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6. Function and Control 6.2 Brief Description of Models and Functions ●Indoor Unit 1.Basic function of system (1)Cooling mode (1) Under this mode, fan and swing operates at setting status. Temperature setting range is 16~30 OC. (2) During malfunction of outdoor unit or the unit is stopped because of protection, indoor unit keeps original operation status. (2)Drying mode (1) Under this mode, fan operates at low speed and swing operates at setting status. Temperature setting range is 16~30 OC. (2) During malfunction of outdoor unit or the unit is stopped because of protection, indoor unit keeps original operation status. (3) Protection status is same as that under cooling mode. (4) Sleep function is not available for drying mode. (3)Heating mode OC. (2) Working condition and process for heating mode: When turn on the unit under heating mode, indoor unit enters into cold air prevention status. When the unit is stopped or at OFF status, and indoor unit has been started up just now, the unit enters into residual heat-blowing status. (4)Working method for AUTO mode: (1) Under this mode, Temperature setting range is 16~30 1.Working condition and process for AUTO mode: a.Under AUTO mode, standard heating Tpreset=20 OC and standard cooling Tpreset=25 OC. The unit will switch mode automatically according to ambient temperature. 2.Protection function a. During cooling operation, protection function is same as that under cooling mode. b. During heating operation, protection function is same as that under heating mode. 3. Display: Set temperature is the set value under each condition. Ambient temperature is (Tamb.-Tcompensation) for heat pump unit and Tamb. for cooling only unit. 4. If theres I feel function, Tcompensation is 0. Others are same as above. (5)Fan mode Under this mode, indoor fan operates at set fan speed. Compressor, outdoor fan, 4-way valve and electric heating tube stop operation. Indoor fan can select to operate at high, medium, low or auto fan speed. Temperature setting range is 16~30 2. Other control (1) Buzzer Upon energization or availably operating the unit or remote controller, the buzzer will give out a beep. (2) Auto button If press this auto button when turning off the unit, the complete unit will operate at auto mode. Indoor fan operates at auto fan 30 Technical Information Service Manual speed and swing function is turned on. Press this auto button at ON status to turn off the unit. (3) Auto fan Heating mode: During auto heating mode or normal heating ode, auto fan speed will adjust the fan speed automatically according to ambient temperature and set temperature. (4) Sleep After setting sleep function for a period of time, system will adjust set temperature automatically. (5) Timer function: General timer and clock timer functions are compatible by equipping remote controller with different functions. (6) Memory function memorize compensation temperature, off-peak energization value. Memory content: mode, up&down swing, light, set temperature, set fan speed, general timer (clock timer can't be memorized). After power recovery, the unit will be turned on automatically according to memory content. (7) Health function During operation of indoor fan, set health function by remote controller. Turn off the unit will also turn off health function. Turn on the unit by pressing auto button, and the health is defaulted ON. (8)I feel control mode After controller received I feel control signal and ambient temperature sent by remote controller, controller will work according to the ambient temperature sent by remote controller. (9)Entry condition for compulsory defrosting function When turn on the unit under heating ode and set temperature is 16 OC (or 16.5 OC by remote controller), press “ , , , , , ” button successively within 5s and then indoor unit will enter into compulsory defrosting setting status: (1) If theres only indoor units controller, it enters into indoor normal defrosting mode. (2) If theres indoor units controller and outdoor units controller, indoor unit will send compulsory defrosting mode signal to outdoor unit and then outdoor unit will operate under normal defrosting mode. After indoor unit received the signal that outdoor unit has entered into defrosting status, indoor unit will cancel to send compulsory mode to outdoor unit. If outdoor unit hasnt received feedback signal from outdoor unit after 3min, indoor unit will also cancel to send compulsory defrosting signal. (10)Refrigerant recovery function: OC. Enter into Freon recovery mode actively: Within 5min after energization, turn on the unit at 16 OC under cooling mode, and press light button for 3 times within 3s to enter into Freon recovery mode. Fo is displayed and Freon recovery mode will be sent to outdoor unit. (11)Ambient temperature display control mode 1. When user set the remote controller to display set temperature
6. Function and Control Service Manual (corresponding remote control code: 01), current set temperature will be displayed. 2. Only when remote control signal is switched to indoor ambient temperature display status (corresponding remote control code: 10) from other display status (corresponding remote control code: 00, 01,11),controller will display indoor ambient temperature for 3s and then turn back to display set temperature. Under this mode, indoor fan operates at set fan speed. Compressor, outdoor fan, 4-way valve and electric heating tube stop operation. Indoor fan can select to operate at high, medium, low or auto fan speed. Temperature setting range is 16~30 (12)Off-peak energization function: Adjust compressors minimum stop time. The original minimum stop time is 180s and then we change to: The time interval between two start-ups of compressor can't be less than 180+Ts(0≤T≤15). T is the variable of controller. Thats to say the minimum stop time of compressor is 180s~195s. Read- in T into memory chip when refurbish the memory chip each time. After power recovery, compressor can only be started up after 180+T s at least. (13) SE control mode The unit operates at SE status. (14) X-fan mode When X-fan function is turned on, after turn off the unit, indoor fan will still operate at low speed for 2min and then the complete unit will be turned off. When x-fan function is turned off, after turn off the unit, the complete unit will be turned off directly. (15) 8 OC heating function Under heating mode, you can set 8 OC heating function by remote controller. The system will operate at 8 OC set temperature. (16)Turbo function Turbo function can be set under cooling and heating modes. Press Fan Speed button to cancel turbo setting. Turbo function is not available under auto, drying and fan modes. 31 Technical Information OC.
●Outdoor Unit 1. Cooling mode: Working condition and process of cooling mode: ① When Tindoor ambient temperature≥Tpreset, unit enters into cooling mode. Indoor fan, outdoor fan and compressor start operation. Indoor fan operates according to set fan speed. ② When Tindoor ambient temperature≤Tpreset-2℃, compressor stops operation and outdoor fan will stop 30s later. Indoor fan operates according to set fan speed. ③ When Tpreset-2℃＜Tindoor ambient temperature ＜Tpreset, unit operates according to the previous status. Under cooling mode, 4-way valve is not energized. Temperature setting range is 16~30 ℃. If compressor stops because of malfunction in cooling mode, indoor fan and swing motor will work according to the original status. 2. Drying mode (1) Working condition and process of drying mode ① When Tindoor ambient temperature ＞Tpreset, unit will be in drying mode. Outdoor fan and compressor start operation while indoor fan will operate at low fan speed. ② When Tpreset-2℃≤Tindoor ambient temperature≤Tpreset, unit operates according to the previous status. ③ When Tindoor ambient temperature ＜Tpreset-2 ℃, compressor stops operation and outdoor fan will stop 30s later. (2) Under drying mode, 4-way valve is not energized. Temperature setting range is 16~30℃. (3) Protection function: same as in cooling mode. 3. Fan mode (1) Under this mode, indoor fan can select different fan speed (except Turbo) or auto fan speed. Compressor, outdoor fan and 4-way valve all stop operation. (2) In fan mode, temperature setting range is 16~30℃. 4. Heating mode Working condition and process of heating mode: ① W h e n T p r e s e t - ( Ti n d o o r a m b i e n t t e m p e r a t u r e - Tcompensation)≥1℃, unit enters into heating mode. Compressor, outdoor fan and 4-way valve start operation. ② When -2 ℃ ＜Tpreset-(Tindoor ambient temperature- Tcompensation) ＜1℃, unit operates according to the previous status. ③ W h e n T p r e s e t - ( Ti n d o o r a m b i e n t t e m p e r a t u r e - Tcompensation)≤-2 ℃, compressor stops operation and outdoor fan will stop 30s later. Indoor fan will be in residual-heat blowing status. ④ When unit is turned off under heating mode or changed to other modes from heating mode, 4-way valve will be power-off 2min after compressor stops working (compressor is in operation status under heating mode). ⑤ When Toutdoor ambient temperature ＞30 ℃, compressor stops operation immediately. Outdoor fan will stop 30s later. 32 Installation and Maintenance Service Manual ⑥ Under the condition that compressor is turned on, when unit is changed to heating mode from cooling or drying mode, 4-way valve will be energized in 2~3mins delay. Note: Tcompensation is determined by IDU and ODU. If IDU controls the compensation temperature, then Tcompensation is determined according to the value sent by IDU to ODU; If IDU does not control the compensation temperature, then Tcompensation will default to 3℃ by the ODU. 5. Freon recovery mode After the Freon recovery signal from IDU is received, cooling at rated frequency will be forcibly turned on to recover Freon. Indoor unit will display Fo. If any signal from remote controller is received, unit will exit from Freon recovery mode and indoor unit stops displaying Fo. 6. Compulsory defrosting If unit is turned on under heating mode and set temperature is 16 ℃ (by remote controller), press “ , , , , , ” within 5s, unit will enter into compulsory defrosting mode and send the signal to ODU. When the compulsory defrosting signal from ODU is received, IDU will exit from the compulsory defrosting mode and stop sending the signal to ODU. After ODU receives the compulsory defrosting code, it will start compulsory defrosting. Defrosting frequency and opening angle will be the same as in normal defrosting mode. When compulsory defrosting is finished, the complete unit resumes original status. 7. Auto mode Auto mode is determined by controller of IDU. See IDU logic for details. 8. 8 OC heating OC. Display board of IDU displays 8 OC. Under Set temperature is 8 this mode, “Cold air prevention” function is shielded. If compressor is operating under this mode, fan speed will adjust according to auto fan speed; if compressor stops operation under this mode, indoor fan will be in residual-heat blowing status. When power on, communication light will be blinking in a normal way (after receiving a group of correct signals, blinking stops for 0.2s~0.3s). If theres no communication, communication light will be always on. If other ODU has malfunction, communication light will be on for 1s and off for 1s in a circular way.
Service Manual 6.3 GREE+ App Operation Manual Control Flow Chart Home Wi-Fi Gree intelligent home appliances Home wireless router Operating Systems Requirement for User's smart phone: iOS system Support iOS7.0 and above version Download and installation GREE+ App Download Linkage Scan the QR code or search "GREE+" in the application market to download and install it. When "GREE+" App is installed, register the account and add the device to achieve long-distance control and LAN control of Gree smart home appliances. For more information, please refer to "Help" in App. 33 Installation and Maintenance Internet Gree Cloud Cellular/ Other Wi-FI Home Wi-Fi GREE+ APP Android system Support Android 4.4 and above version
6.4 Ewpe Smart App Operation Manual Control Flow Chart intelligent Home Wi-Fi home appliances Home wireless router Operating Systems Requirement for User's smart phone: iOS system Support iOS7.0 and above version Download and installation App Download Linkage Scan the QR code or search "Ewpe Smart" in the application market to download and install it. When "Ewpe Smart" App is installed, register the account and add the device to achieve long-distance control and LAN control of smart home appliances. For more information, please refer to "Help" in App. 34 Installation and Maintenance Service Manual Internet Cloud Cellular/ Other Wi-FI Home Wi-Fi APP Android system Support Android 4.4 and above version
7. Notes for Installation and Maintenance Service Manual Safety Precautions: Important! Please read the safety precautions carefully before installation and maintenance. The following contents are very important for installation and maintenance. Please follow the instructions below. ●The installation or maintenance must accord with the instructions. ●Comply with all national electrical codes and local electrical codes. ●Pay attention to the warnings and cautions in this manual. ●All installation and maintenance shall be performed by distributor or qualified person. ●All electric work must be performed by a licensed technician according to local regulations and the instructions given in this manual. ●Be caution during installation and maintenance. Prohibit incorrect operation to prevent electric shock, casualty and other accidents. WARNINGS Electrical Safety Precautions: 1. Cut off the power supply of air conditioner before checking and maintenance. 2. The air condition must apply specialized circuit and prohibit share the same circuit with other appliances. 3. The air conditioner should be installed in suitable location and ensure the power plug is touchable. 4. Make sure each wiring terminal is connected firmly during installation and maintenance. 5. Have the unit adequately grounded. The grounding wire can't be used for other purposes. 6. Must apply protective accessories such as protective boards, cable-cross loop and wire clip. 7. The live wire, neutral wire and grounding wire of power supply must be corresponding to the live wire, neutral wire and grounding wire of the air conditioner. 8. The power cord and power connection wires can't be pressed by hard objects. 9. If power cord or connection wire is broken, it must be replaced by a qualified person. 10. If the power cord or connection wire is not long enough, please get the specialized power cord or connection wire from the manufacture or distributor. Prohibit prolong the wire by yourself. 35 Installation and Maintenance 11. For the air conditioner without plug, an air switch must be installed in the circuit. The air switch should be all-pole parting and the contact parting distance should be more than 3mm. 12. Make sure all wires and pipes are connected properly and the valves are opened before energizing. 13. Check if there is electric leakage on the unit body. If yes, please eliminate the electric leakage. 14. Replace the fuse with a new one of the same specification if it is burnt down; dont replace it with a cooper wire or conducting wire. 15. If the unit is to be installed in a humid place, the circuit breaker must be installed. Installation Safety Precautions: 1. Select the installation location according to the requirement of this manual.(See the requirements in installation part) 2. Handle unit transportation with care; the unit should not be carried by only one person if it is more than 20kg. 3. When installing the indoor unit and outdoor unit, a sufficient fixing bolt must be installed; make sure the installation support is firm. 4. Ware safety belt if the height of working is above 2m. 5. Use equipped components or appointed components during installation. 6. Make sure no foreign objects are left in the unit after finishing installation. Refrigerant Safety Precautions: 1. When refrigerant leaks or requires discharge during installation, maintenance, or disassembly, it should be handled by certified professionals or otherwise in compliance with local laws and regulations. 2.Avoid contact between refrigerant and fire as it generates poisonous gas; Prohibit prolong the connection pipe by welding. 3. Apply specified refrigerant only. Never have it mixed with any other refrigerant. Never have air remain in the refrigerant line as it may lead to rupture or other hazards. 4. Make sure no refrigerant gas is leaking out when installation is completed. 5. If there is refrigerant leakage, please take sufficient measure to minimize the density of refrigerant. 6. Never touch the refrigerant piping or compressor without wearing glove to avoid scald or frostbite. Improper installation may lead to fire hazard, explosion, electric shock or injury.
7. Notes for Installation and Maintenance Safety Precautions for Installing and Relocating the Unit: To ensure safety, please be mindful of the following precautions. WARNINGS 1. When installing or relocating the unit, be sure to keep the refrigerant circuit free from air or substances other than the specified refrigerant. Any presence of air or other foreign substance in the refrigerant circuit will cause system pressure rise or compressor rupture, resulting in injury. 2.When installing or moving this unit, do not charge the refrigerant which is not comply with that on the nameplate or unqualified refrigerant. Otherwise, it may cause abnormal operation, wrong action, mechanical malfunction or even series safety accident. 3.When refrigerant needs to be recovered during relocating or repairing the unit, be sure that the unit is running in cooling mode.Then, fully close the valve at high pressure side (liquid valve).About 30-40 seconds later, fully close the valve at low pressure side (gas valve), immediately stop the unit and disconnect power. Please note that the time for refrigerant recovery should not exceed 1 minute. If refrigerant recovery takes too much time, air may be sucked in and cause pressure rise or compressor rupture, resulting in injury. 4.During refrigerant recovery, make sure that liquid valve and gas valve are fully closed and power is disconnected before detaching the connection pipe. If compressor starts running when stop valve is open and connection pipe is not yet connected, air will be sucked in and cause pressure rise or compressor rupture, resulting in injury. 36 Installation and Maintenance Service Manual 5.When installing the unit, make sure that connection pipe is securely connected before the compressor starts running. If compressor starts running when stop valve is open and connection pipe is not yet connected, air will be sucked in and cause pressure rise or compressor rupture, resulting in injury. 6.Prohibit installing the unit at the place where there may be leaked corrosive gas or flammable gas. If there leaked gas around the unit, it may cause explosion and other accidents. 7.Do not use extension cords for electrical connections. If the electric wire is not long enough, please contact a local service center authorized and ask for a proper electric wire. Poor connections may lead to electric shock or fire. 8.Use the specified types of wires for electrical connections between the indoor and outdoor units. Firmly clamp the wires so that their terminals receive no external stresses. Electric wires with insufficient capacity, wrong wire connections and insecure wire terminals may cause electric shock or fire.
Service Manual Appliance filled with flammable gas R32. Before use the appliance, read the owner’s ma- nual first. To realize the function of the air conditioner unit, a special refrigerant circulates in the system. The used refrigerant is the fluoride R32, which is specially cleaned. The refrigerant is flammable and inodorous. Furthermore, it can lead to ex- plosion under certain conditions. But the flam- mability of the refrigerant is very low. It can be ignited only by fire. Compared to common refrigerants, R32 is a nonpolluting refrigerant with no harm to the ozonosphere. The influence upon the green- house effect is also lower. R32 has got very good thermodynamic features which lead to a really high energy efficiency. The units there fore need a less filling. WARNING Do not use means to accelerate the defrosting process or to clean, other than those recomm- ended by the manufacture. Should repair be necessary, contact your nea rest authorized Service Centre. Any repairs carried out by unq- ualified personnel may be dangerous. The app- liance shall be stored in a room without contin- uously operating ignition sources. (for example: open flames, an operating gas appliance or an operating electric heater.) Do not pierce or burn. Appliance shall be installed, operated and stored in a room with a floor area larger than X m . (Please refer to table "a" in section of " Safety operation of flammable refrigerant " for space X.) Appliance filled with flammable gas R32 . For repairs, strictly follow manufacturer’s instructions only . Be aware that refrigerants may not contain an odour . Read specialist’s manual. 37 Installation and Maintenance This appliance is not intended for use by persons (including children) with reduced physical, sensory or d n a e c n eir e p x e f o k c al r o ,s eitilib a p a c la t n e m knowledge, unless they have been given superv- ision or instruction concerning use of the applia- nce by a person responsible for their safety. Children should be supervised to ensure that th- ey do not play with the appliance. Before install the appliance, read the installation manual first. Before repair the appliance, read the service ma- nual first. Frequency band(s) in which the radio equipment 1) operates: 2400MHz-2483.5MHz 2) Maximum radio-frequency power transmitted in the frequency band(s) in which the radio equipment operates: 20dBm R32: 675 This marking indicates that this prod- uct should not be disposed with other house hold wastes. To prevent possib- le harm to the environment or human health from uncontrolled waste throu- ghout the EU. To prevent possible harm to the en- vironment or human health. From uncontrolled waste disposal, recycle it res- ponsibly to promote the sustainable reuse of material resources. To return your used device, please use the return and collection systems or contact the retailer where the product was pur- chased. They can take this product for environ- mental safe recycling. If it needs to install, move or maintain the air co- nditioner, please contact dealer or local service center to conduct it at first. Air conditioner must be installed, moved or maintained by appointed unit. Otherwise, it may cause serious damage or personal injury or death. Safety operation of flammable refrigerant 2 Qualification requirement for installation and maintenance man All the work men who are engaging in the refrig- eration system should bear the valid certification awarded by the authoritative organization and the qualification for dealing with the refrigeration system recognized by this industry. If it needs other technician to maintain and repair the appl- iance, they should be supervised by the person who bears the qualification for using the flamm- able refrigerant. It can only be repaired by the method suggested by the equipment’s manufacturer.
Installation notes Check whether there is fire source or potential fire source in the maintenance area. The air conditioner must be installed in a room that is larger than the minimum room area. The minimum room area is shown on the nameplate or following table a. - The naked flame is prohibited in the mainte- nance area; and the “no smoking” warning board should be hanged. Check whether the appliance mark is in good condition. It is not allowed to drill hole or burn the connec- tion pipe. - Replace the vague or damaged warning mark. Leak test is a must after installation. table a - Minimum room area ( m ) 2 Welding If you should cut or weld the refrigerant system pipes in the process of maintaining, please foll- ow the steps as below: Charge amount (kg) location floor mounted wall window mounted mounted ceiling a. Shut down the unit and cut power supply b. Eliminate the refrigerant / / / / ≤1.2 c. Vacuuming d. e. Cutting or welding 1.3 14.5 1.6 5.2 1.1 Clean it with N2 gas 1.4 16.8 6.1 1.9 1.3 f. Carry back to the service spot for welding The refrigerant should be recycled into the sp- ecialized storage tank. 2.1 1.4 1.5 19.3 7 1.6 1.6 22 2.4 7.9 Make sure that there isn’t any naked flame ne- ar the outlet of the vacuum pump and it’s well- ventilated. 1.7 2.8 1.8 24.8 8.9 1.8 27.8 10 3.1 2.1 Filling the refrigerant Use the refrigerant filling appliances specia- lized for R32. Make sure that different kinds of refrigerant won’t contaminate with each other. The refrigerant tank should be kept upright at the time of filling refrigerant. 1.9 3.4 2.3 31 11.2 2 3.8 2.6 34.3 12.4 2.8 2.1 37.8 13.6 4.2 Stick the label on the system after filling is fin- ished (or haven’t finished). Don’t overfilling. 2.2 4.6 3.1 41.5 15 5 2.3 45.4 16.3 3.4 After filling is finished, please do the leakage detection before test running; another time of leak detection should be done when it’s removed. 2.4 49.4 17.8 5.5 3.7 2.5 53.6 19.3 6 4 Safety instructions for transportation and storage Maintenance notes Please use the flammable gas detector to ch- eck before unload and open the container. Check whether the maintenance area or the ro- om area meet the requirement of the nameplate. - It’s only allowed to be operated in the rooms No fire source and smoking. According to the local rules and laws. that meet the requirement of the nameplate. Check whether the maintenance area is well- ventilated. - The continuous ventilation status should be kept during the operation process. 38 Installation and Maintenance Service Manual
7. Notes for Installation and Maintenance Service Manual Main Tools for Installation and Maintenance Level meter Measuring tape Drill head Electric drill Torque wrench Open-end wrench Inner hexagon Vacuum pump Pressure meter Pipe cutter Pipe bender Pipe expander Electronic scale Refrigerant container 39 Installation and Maintenance Screw driver Impact drill Electroprobe Universal meter Electronic leakage detector spanner Pipe pliers Pipe pliers Soldering appliance
Service Manual 8. Installation 8.1 Installation Dimension Diagram Space to the ceiling At least 15cm Space to the wall At least 15cm At least 15cm Space to the wall At least 300cm Space to the obstruction Space to the floor At least 250cm Space to the obstruction At least 50cm Space to the obstruction At least 30cm Drainage pipe At least 30cm Space to the wall Space to the obstruction At least 50cm Space to the obstruction At least 200cm 40 Installation and Maintenance
Installation Procedures 8. Installation Service Manual 41 Installation and Maintenance Start installation Preparation before installation Prepare tools Read the requirements for electric connection select installation location Select indoor unit installation location Select outdoor unit installation location Install the support of outdoor unit (select it according to the actual situation) Install wall-mounting frame, drill wall holes Connect pipes of indoor unit and drainage pipe Fix outdoor unit Install drainage joint of outdoor unit (only for cooling and heating unit) Connect wires of indoor unit Bind up pipes and hang the indoor unit Make the bound pipes pass through the wall hole and then connect outdoor unit Connect pipes of outdoor unit Connect wires of outdoor unit Neaten the pipes Vacuum pumping and leakage detection Check after installation and test operation Finish installation Note: this flow is only for reference; please find the more detailed installation steps in this se
Service Manual 8. Installation 8.2 Installation Parts-checking No. Name 1 Indoor unit 2 Outdoor unit 3 Connection pipe 4 Drainage pipe 5 Wall-mounting frame 6 Connecting cable(power cord) 7 Wall pipe 8 Sealing gum 9 Wrapping tape 10 Support of outdoor unit 11 Fixing screw 12 Drainage plug(cooling and heating unit) 13 Owners manual, remote controller Note: 1.Please contact the local agent for installation. 2.Dont use unqualified power cord. 8.3 Selection of Installation Location 1. Basic Requirement: Installing the unit in the following places may cause malfunction. If it is unavoidable, please consult the local dealer: (1) The place with strong heat sources, vapors, flammable or explosive gas, or volatile objects spread in the air. (2) The place with high-frequency devices (such as welding machine, medical equipment). (3) The place near coast area. (4) The place with oil or fumes in the air. (5) The place with sulfureted gas. (6) Other places with special circumstances. (7) The appliance shall nost be installed in the laundry. (8) It’s not allowed to be installed on the unstable or motive base structure(such as truck) or in the corrosive environment (such as chemical factory). 2. Indoor Unit: (1) There should be no obstruction near air inlet and air outlet. (2) Select a location where the condensation water can be dispersed easily andwont affect other people. (3) Select a location which is convenient to connect the outdoor unit and near the power socket. (4) Select a location which is out of reach for children. (5) The location should be able to withstand the weight of indoor unit and wont increase noise and vibration. (6) The appliance must be installed 2.5m above floor. (7) Dont install the indoor unit right above the electric appliance. (8) Please try your best to keep way from fluorescent lamp. 42 Installation and Maintenance 3. Outdoor Unit: (1) Select a location where the noise and outflow air emitted by the outdoor unit will not affect neighborhood. (2) The location should be well ventilated and dry, in which the outdoor unit wont be exposed directly to sunlight or strong wind. (3) The location should be able to withstand the weight of outdoor unit. (4) Make sure that the installation follows the requirement of installation dimension diagram. (5) Select a location which is out of reach for children and far away from animals or plants.If it is unavoidable, please add fence for safety purpose. 8.4 Electric Connection Requirement 1. Safety Precaution (1) Must follow the electric safety regulations when installing the unit. (2) According to the local safety regulations, use qualified power supply circuit and air switch. (3) Make sure the power supply matches with the requirement of air conditioner. Unstable power supply or incorrect wiring may result in electric shock,fire hazard or malfunction. Please install proper power supply cables before using the air conditioner. (4) Properly connect the live wire, neutral wire and grounding wire of power socket. (5) Be sure to cut off the power supply before proceeding any work related to electricity and safety. (6) Do not put through the power before finishing installation. (7) If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard . (8) The temperature of refrigerant circuit will be high, please keep the interconnection cable away from the copper tube. (9) The appliance shall be installed in accordance with national wiring regulations. (10) Appliance shall be installed, operated and stored in a room with a floor area larger than “X”m 2 (see table a). Please notice that the unit is filled with flammable gas R32. Inappropriate treatment of the unit involves the risk of severe damages of people and material. Details to this refrigerant are found in chapter “refrigerant”. 2. Grounding Requirement: (1) The air conditioner is the first class electric appliance.It must be properly grounding with specialized grounding device by a professional. Please make sure it is always grounded effectively,otherwise it may cause electric shock. (2) The yellow-green wire in air conditioner is grounding wire, which can't be used for other purposes. (3) The grounding resistance should comply with national electric safety regulations. (4) The appliance must be positioned so that the plug is accessible. (5) An all-pole disconnection switch having a contact separation of at least 3mm in all poles should be connected in fixed wiring. (6) Including an air switch with suitable capacity, please note the following table. Air switch should be included magnet buckle and heating buckle function, it can protect the circuit-short and overload. (Caution: please do not use the fuse only for protect the circuit) Model Air switch capacity Power cord 7/9K 10A 3G1.0 18K 16A 3G1.5 21/24/28K 25A 3G2.5
Service Manual 8. Installation 8.5 Installation of Indoor Unit 4. Outlet Pipe (1) The pipe can be led out in the direction of right, rear right, left or rear left.(As show in Fig.3) 1. Choosing Installation Iocation Recommend the installation location to the client and then confirm it with the client. (2) When selecting leading out the pipe from left or right, please cut off the corresponding hole on the bottom case.(As show in Fig.4) 2. Install Wall-mounting Frame (1) Hang the wall-mounting frame on the wall; adjust it in horizontal position with the level meter and then point out the screw fixing holes on the wall. Left Right (2) Drill the screw fixing holes on the wall with impact drill (the specification of drill head should be the same as the plastic expansion particle) and then fill the plastic expansion particles in the holes. Cut off the hole Left Rear left Right Rear right Fig.3 Fig.4 (3) Fix the wall-mounting frame on the wall with tapping screws and then check if the frame is firmly installed by pulling the frame. If the plastic expansion particle is loose, please drill another fixing hole nearby. 5. Connect the Pipe of Indoor Unit (1) Aim the pipe joint at the corresponding bellmouth.(As show in Fig.5) 3. Install Wall-mounting Frame (2) Pretightening the union nut with hand. (1) Choose the position of piping hole according to the direction of outlet pipe. The position of piping hole should be a little lower than the wall-mounted frame,shown as below.(As show in Fig.1) (3) Adjust the torque force by referring to the following sheet. Place the open-end wrench on the pipe joint and place the torque wrench on the union nut. Tighten the union nut with torque wrench.(As show in Fig.6) Mark in the middle of it Wall (4) Wrap the indoor pipe and joint of connection pipe with insulating pipe, and then wrap it with tape.(As show in Fig.7) Space Wall to the Space wall above 150mm Left to the wall above 150mm Open-end wrench Right (Rear piping hole) Level meter Union nut Union nut Pipe joint Pipe (For some models) (Rear piping hole) Pipe Torque wrench Fig.1 Indoor pipe Fig.5 Fig.6 (2) Open a piping hole with the diameter of Φ55mm or Φ70mm on the selected outlet pipe position. In order to drain smoothly, slant the piping hole on the wall slightly downward to the outdoor side with the gradient of 5-10°.(As show in Fig.2) Indoor Outdoor Insulating pipe Fig.7 5-10° Φ55/70mm Refer to the following table for wrench moment of force: Fig.2 Piping size Tightening torque(N.m) Note: 1/4” 15~20 Pay attention to dust prevention and take relevant safety 3/8” 30~40 measures when opening the hole. 1/2” 45~55 5/8” 60~65 3/4” 70~75 43 Installation and Maintenance
Service Manual 8. Installation 6. Install Drain Hose 9/18/21/24/28K 7K (1) Connect the drain hose to the outlet pipe of indoor unit.(As show in Fig.8) Fig.13 3 2 N(1) 3 2 N(1) brown green yellow- black blue brown green yellow- black blue (2) Bind the joint with tape.(As show in Fig.9) Outdoor unit connection Outdoor unit connection Drain hose Outlet pipe Note: The wiring connect is for reference only, please refer to the actual one. Drain hose Outlet (4) Put wiring cover back and then tighten the screw. Tape pipe (5) Close the panel. Fig.8 Fig.9 Note: Note: (1) All wires of indoor unit and outdoor unit should be connected by a professional. (1) Add insulating pipe in the indoor drain hose in order to (2) If the length of power connection wire is insufficient, please contact the supplier for a new one. Avoid extending the wire by yourself. prevent condensation. (2) The plastic expansion particles are not provided. (3) For the air conditioner with plug, the plug should be reachable after finishing installation. (As show in Fig.10) (4) For the air conditioner without plug, an air switch must be installed in the line. The air switch should be all-pole parting and the contact parting distance should be more than 3mm. Drain hose 8. Bind up Pipe Insulating pipe (1) Bind up the connection pipe, power cord and drain hose with the band.(As show in Fig.14) Fig.10 (2) Reserve a certain length of drain hose and power cord for installation when binding them. When binding to a certain degree, separate the indoor power and then separate the drain hose.(As show in Fig.15) 7. Connect Wire of Indoor Unit (1) Open the panel, remove the screw on the wiring cover and then take down the cover.(As show in Fig.11) (3) Bind them evenly. Panel Screw (4) The liquid pipe and gas pipe should be bound separately at the end. Indoor and outdoor power cord Indoor unit Gas pipe Wiring cover Fig.11 (2) Make the power connection wire go through the cable-cross hole at the back of indoor unit and then pull it out from the front side.(As show in Fig.12) Liquid pipe Drain hose Band Fig.14 Cable-cross hole Drain hose Band Connection pipe Power connection wire Fig.12 (3) Remove the wire clip; connect the power connection wiresignal control wire (only for cooling and heating unit) to the wiring terminal according to the color; tighten the screw and then fix the power connection wire with wire clip.(As show in Fig.13) Indoor power cord Fig.15 44 Installation and Maintenance
Service Manual 8. Installation Note: (1) The power cord and control wire can't be crossed or winding. (2) The drain hose should be bound at the bottom. 9. Hang the Indoor Unit (1) Put the bound pipes in the wall pipe and then make them pass through the wall hole. (2) Hang the indoor unit on the wall-mounting frame. (3) Stuff the gap between pipes and wall hole with sealing gum. (4) Fix the wall pipe.(As show in Fig.16) (5) Check if the indoor unit is installed firmly and closed to the wall.(As show in Fig.17) Indoor Outdoor Wall pipe Sealing gum Lower hook of wall-mounting frame Fig.16 Fig.17 Note: Do not bend the drain hose too excessively in order to prevent blocking. 8.6 Installation of Outdoor unit 1. Fix the Support of Outdoor Unit(Select it according to the actual installation situation) (1) Select installation location according to the house structure. (2) Fix the support of outdoor unit on the selected location with expansion screws. Note: (1) Take sufficient protective measures when installing the outdoor unit. (2) Make sure the support can withstand at least four times the unit weight. (3) The outdoor unit should be installed at least 3cm above the floor in order to install drain joint.(As show in Fig.18) (4) For the unit with cooling capacity of 2300W~5000W, 6 expansion screws are needed; for the unit with cooling capacity of 6000W~8000W, 8 expansion screws are needed; for the unit with cooling capacity of 10000W~16000W, 10 expansion screws are needed. 45 Installation and Maintenance Drain vent Chassis Outdoor drain joint Drain hose At least 3cm above the floor Fig.18 Fig.19 2. Install Drain Joint(Only for cooling and heating unit) (1) Connect the outdoor drain joint into the hole on the chassis. (2) Connect the drain hose into the drain vent. (As show in Fig.19) 3. Fix Outdoor Unit Upper hook (1) Place the outdoor unit on the support. (2) Fix the foot holes of outdoor unit with bolts. (As show in Fig.20) Foot holes Handle Foot holes Valve cover Fig.20 Fig.21 4. Connect Indoor and Outdoor Pipes (1) Remove the screw on the right handle of outdoor unit and then remove the handle.(As show in Fig.21) Note:(1) When there're multiple cables passing through it, the cross- hole of handle should be knocked off and eliminate the sharp burrs for avoid damaging the cables.(As show in Fig.23) (2) Only applicable for some models. cross-hole Fig.23 (2) Remove the screw cap of valve and aim the pipe joint at the bellmouth of pipe.(As show in Fig.24) Liquid pipe Pipe joint Liquid valve gas pipe Union nut gas valve Fig.24
8. Installation (3) Pretightening the union nut with hand. (4) Tighten the union nut with torque wrench . Refer to the following table for wrench moment of force: Piping size Tightening torque(N.m) 1/4” 15~20 3/8” 30~40 1/2” 45~55 5/8” 60~65 3/4” 70~75 5. Connect Outdoor Electric Wire (1) Remove the wire clip; connect the power connection wire and signal control wire (only for cooling and heating unit) to the wiring terminal according to the color; fix them with screws.(As show in Fig.25) N(1) 2 L(3) yellow- green brown yellow- green blue black brown blue (black) N L Indoor unit connection POWER Fig.25 Note: the wiring connect is for reference only,please refer to the actual one. (2) Fix the power connection wire and signal control wire with wire clip (only for cooling and heating unit). Note: (1) After tightening the screw, pull the power cord slightly to check if it is firm. (2) Never cut the power connection wire to prolong or shorten the distance. 6. Installation connection wires of DRED module (1) For the connection wire and power cord of DRED module, it’s suggested to use rubber cord that is pursuant to IEC 57 of IEC 60245. If the power cord and connection wire use H05VV-F or other conducting wires that are unsuitable for outdoors, we suggest user should install the power cord and connection wire in wire-leading ducts that are separated from rain and violet ray. (2) DRED module should be installed indoors or inside an enclosed space that can prevent rain and violet ray. (3)The connection wire of DRED module and the wire connecting indoor unit and outdoor unit shall share a same wire clip. Another wire clip is used to secure the power cord of outdoor unit (as picture shows). Note:Below picture is for reference. Please refer to actual products. 46 Installation and Maintenance Service Manual POWER DRED module connection wires of DRED module 7. Neaten the Pipes (1) The pipes should be placed along the wall, bent reasonably and hidden possibly. Min. semidiameter of bending the pipe is 10cm. (2) If the outdoor unit is higher than the wall hole, you must set a U-shaped curve in the pipe before pipe goes into the room, in order to prevent rain from getting into the room.(As show in Fig.26) The drain hose can't raise upwards. Wall U-shaped curve Drain hose Fig.26 Fig.27 Note: (1) The through-wall height of drain hose shouldnt be higher than the outlet pipe hole of indoor unit.(As show in Fig.27) (2) Slant the drain hose slightly downwards. The drain hose can't be curved, raised and fluctuant, etc.(As show in Fig.28) (3) The water outlet can't be placed in water in order to drain smoothly.(As show in Fig.29) The drain hose can't be fluctuant The water outlet can't be placed in water The drain hose can't be fluctuant The water outlet can't be fluctuant Fig.28 Fig.29
8. Installation Service Manual 8.8 Check after Installation and Test operation 8.7 Vacuum Pumping and Leak Detection 1. Check after Installation 1. Use Vacuum Pump Check according to the following requirement after finishing installation. (1) Remove the valve caps on the liquid valve and gas valve and the nut of refrigerant charging vent. (2) Connect the charging hose of piezometer to the refrigerant charging vent of gas valve and then connect the other charging hose to the vacuum pump. NO. Items to be checked Possible malfunction 1 Has the unit been installed firmly? (3) Open the piezometer completely and operate for 10-15min to check if the pressure of piezometer remains in -0.1MPa. 2 Have you done the refrigerant leakage test? (4) Close the vacuum pump and maintain this status for 1-2min to check if the pressure of piezometer remains in -0.1MPa. If the pressure decreases, there may be leakage. 3 Is heat insulation of pipeline sufficient? 4 Is water drained well? It may cause condensation and water dripping. (5) Remove the piezometer, open the valve core of liquid valve and gas valve completely with inner hexagon spanner. Is the voltage of power supply according to the voltage marked on the nameplate? (6) Tighten the screw caps of valves and refrigerant charging vent.(As show in Fig.30) 5 6 Is electric wiring and pipeline installed correctly? Liquid valve Piezometer Lo Hi 7 Is the unit grounded securely? Gas valve Valve cap Refrigerant charging vent 8 Does the power cord follow the specification? Nut of refrigerant 9 Is there any obstruction in air inlet and air outlet? Charging vent 10 The dust and sundries caused during installation are removed? Vacuum pump Inner hexagon spanner 11 The gas valve and liquid valve of connection pipe are open completely? Open Close 12 Is the inlet and outlet of piping hole been covered? Fig.30 2. Test Operation 2. Leakage Detection (1) Preparation of test operation (1) With leakage detector: ● The client approves the air conditioner installation. Check if there is leakage with leakage detector. ● Specify the important notes for air conditioner to the client. (2) With soap water: (2) Method of test operation If leakage detector is not available, please use soap water for leakage detection. Apply soap water at the suspected position and keep the soap water for more than 3min. If there are air bubbles coming out of this position, there's a leakage. ● Put through the power, press ON/OFF button on the remote controller to start operation. ● Press MODE button to select AUTO, COOL, DRY, FAN and HEAT to check whether the operation is normal or not. ● If the ambient temperature is lower than 16℃, the air conditioner can't start cooling. 47 Installation and Maintenance The unit may drop, shake or emit noise. It may cause insufficient cooling (heating) capacity. It may cause condensation and water dripping. It may cause malfunction or damage the parts. It may cause malfunction or damage the parts. It may cause electric leakage. It may cause malfunction or damage the parts. It may cause insufficient cooling (heating) capacity. It may cause malfunction or damaging the parts. It may cause insufficient cooling (heating) capacity. It may cause insufficient cooling(heating) capacity or waster eletricity.
9. Maintenance 9.1 Error Code List Display Method Possible Causes(For specific maintenance method, please refer to the following procedure of Malfunction of Indoor Unit A/C Status Name (Error Code) troubleshooting) Possible reasons: 1. Refrigerant was superabundant; 2. Poor heat exchange (including filth blockage of heat exchanger and bad radiating environment ); Ambient temperature is too high. Anti-freezing protection for evaporator During cooling and drying operation, except indoor fan operates, all loads stop operation. During heating operation, the complete unit stops. High pressure protection of system E1 E2 Not the error code. It’s the status code for the operation. System block or refrigerant leakage The Dual-8 Code Display will show E3 until the low pressure switch stop operation. 1.Low-pressure protection 2.Low-pressure protection of system 3.Low-pressure protection of compressor E3 High discharge temperature protection of compressor During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating operation, all loads stop. Please refer to the malfunction analysis (discharge protection, overload). E4 During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating operation, all loads stop. 1. Supply voltage is unstable; 2. Supply voltage is too low and load is too high; 3. Evaporator is dirty. Overcurrent protection E5 During cooling operation, compressor stops while indoor fan motor operates. During heating operation, the complete unit stops. Communi- cation Malfunction E6 Refer to the corresponding malfunction analysis. High temperature resistant protection During cooling operation: compressor will stop while indoor fan will operate. During heating operation, the complete unit stops. Refer to the malfunction analysis (overload, high temperature resistant). E8 During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop EEPROM malfunction EE Replace outdoor control panel AP1 Limit/decrease frequency due to high temperature of module Discharging after the complete unit is de-energized for 20mins, check whether the thermal grease on IPM Module of outdoor control panel AP1 is sufficient and whether the radiator is inserted tightly. If its no use, please replace control panel AP1. EU All loads operate normally, while operation frequency for compressor is decreased 1. No jumper cap insert on mainboard. 2. Incorrect insert of jumper cap. 3. Jumper cap damaged. 4. Abnormal detecting circuit of mainboard. Malfunction protection of jumper cap C5 Wireless remote receiver and button are effective, but can not dispose the related command When the outdoor unit receive signal of Gathering refrigerant ,the system will be forced to run under cooling mode for gathering refrigerant Gathering refrigerant F0 Nominal cooling mode 1. Loosening or bad contact of indoor ambient temp. sensor and mainboard terminal. 2. Components in mainboard fell down leads short circuit. 3. Indoor ambient temp. sensor damaged.(check with sensor resistance value chart) 4. Mainboard damaged. Indoor evaporator temperature sensor is open/short circuited Indoor ambient temperature sensor is open/short circuited During cooling and drying operation, indoor unit operates while other loads will stop; during heating operation, the complete unit will stop operation. F1 1. Loosening or bad contact of Indoor evaporator temp. sensor and mainboard terminal. 2. Components on the mainboard fall down leads short circuit. 3. Indoor evaporator temp. sensor damaged.(check temp. sensor value chart for testing) 4. Mainboard damaged. AC stops operation once reaches the setting temperature. Cooling, drying: internal fan motor stops operation while other loads stop operation; heating: AC stop operation F2 48 Installation and Maintenance Service Manual
Service Manual 9. Maintenance During cooling and drying operating, compressor stops while indoor fan operates; During heating operation, the complete unit will stop operation Outdoor ambient temperature sensor is open/short circuited F3 During cooling and drying operation, compressor stops while indoor fan will operate; During heating operation, the complete unit will stop operation. Outdoor condenser temperature sensor is open/short circuited F4 During cooling and drying operation, compressor will sop after operating for about 3 mins, while indoor fan will operate; During heating operation, the complete unit will stop after operating for about 3 mins. Outdoor discharge temperature sensor is open/short circuited F5 Limit/decrease frequency due to overload F6 All loads operate normally, while operation frequency for compressor is decreased Decrease frequency due to overcurrent F8 All loads operate normally, while operation frequency for compressor is decreased Decrease frequency due to high air discharge F9 All loads operate normally, while operation frequency for compressor is decreased Limit/decrease frequency due to antifreezing FH All loads operate normally, while operation frequency for compressor is decreased Poor air-return in indoor unit or fan speed is too low During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. Voltage for DC bus- bar is too high PH 1. Measure the voltage of position L and N on wiring board (XT), if the voltage is higher than 150VAC, turn on the unit after the supply voltage is increased to the normal range. 2.If the AC input is normal, measure the voltage of electrolytic capacitor C on control panel (AP1), if its normal, theres malfunction for the circuit, please replace the control panel (AP1) Compressor Min frequence in test state P0 Showing during min. cooling or min. heating test During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop Voltage of DC bus-bar is too low PL Compressor rated frequence in test state P1 Showing during nominal cooling or nominal heating test Compressor maximum frequence in test state P2 Showing during max. cooling or max. heating test Compressor intermediate frequence in test state P3 Showing during middle cooling or middle heating test During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. Overcurrent protection of phase current for compressor P5 During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop Charging malfunction of capacitor PU 49 Installation and Maintenance Outdoor temperature sensor hasnt been connected well or is damaged. Please check it by referring to the resistance table for temperature sensor) Outdoor temperature sensor hasnt been connected well or is damaged. Please check it by referring to the resistance table for temperature sensor) 1.Outdoor temperature sensor hasnt been connected well or is damaged. Please check it by referring to the resistance table for temperature sensor) 2.The head of temperature sensor hasnt been inserted into the copper tube Refer to the malfunction analysis (overload, high temperature resistant) The input supply voltage is too low; System pressure is too high and overload Overload or temperature is too high; Refrigerant is insufficient; Malfunction of electric expansion valve (EKV) 1. Measure the voltage of position L and N on wiring board (XT), if the voltage is higher than 265VAC, turn on the unit after the supply voltage is increased to the normal range. 2.If the AC input is normal, measure the voltage of electrolytic capacitor C on control panel (AP1), if its normal, theres malfunction for the circuit, please replace the control panel (AP1) Refer to the malfunction analysis (IPM protection, loss of synchronism protection and overcurrent protection of phase current for compressor. Refer to the part three—charging malfunction analysis of capacitor
During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop Malfunction of module temperature sensor circuit P7 Replace outdoor control panel AP1 After the complete unit is de-energized for 20mins, check whether the thermal grease on IPM Module of outdoor control panel AP1 is sufficient and whether the radiator is inserted tightly. If its no use, please replace control panel AP1. During cooling operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop Module high temperature protection P8 During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. 1. Wiring terminal OVC-COMP is loosened. In normal state, the resistance for this terminal should be less than 1ohm. 2.Refer to the malfunction analysis ( discharge protection, overload) Overload protection for compressor H3 During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. Refer to the malfunction analysis (IPM protection, loss of synchronism protection and overcurrent protection of phase current for compressor. IPM protection H5 Malfunction of zero- cross detection circuit U8 The complete unit stops 1.Power supply is abnormal; 2.Detection circuit of indoor control mainboard is abnormal. 1. Bad contact of DC motor feedback terminal. 2. Bad contact of DC motor control end. 3. Fan motor is stalling. 4. Motor malfunction. 5. Malfunction of mainboard revdetecting circuit. Internal fan motor, external fan motor, compressor and electric heater stop operation,guide louver stops at present location. Internal motor (fan motor) do not operate H6 During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. Refer to the malfunction analysis (IPM protection, loss of synchronism protection and overcurrent protection of phase current for compressor. Desynchro-nizing of compressor H7 During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. PFC protection HC Refer to the malfunction analysis Outdoor DC fan motor malfunction L3 Outdoor DC fan motor malfunction lead to compressor stop operation, DC fan motor malfunction or system blocked or the connector loosed compressor stop operation and Outdoor fan motor will stop 30s latter , 3 minutes latter fan motor and compressor will restart To protect the electronical components when detect high power power protection L9 Indoor unit and outdoor unit doesnt match LP compressor and Outdoor fan motor can't work Indoor unit and outdoor unit doesnt match During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop operation. Failure start-up LC Refer to the malfunction analysis Heating indicator off for 0.5s and then blinks for 10s Defrosting will occur in heating mode. Compressor will operate while indoor fan will stop operation. Defrosting Not the error code. It’s the status code for the operation If this malfunction occurs during heating operation, the complete unit will stop operation. 1.Supply voltage is lower than AC175V; 2.Wiring terminal 4V is loosened or broken; 3.4V is damaged, please replace 4V. The four-way valve is abnormal U7 50 Installation and Maintenance Service Manual
Service Manual During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop Malfunction of phase current detection circuit for compressor U1 During cooling and drying operation, compressor will stop while indoor fan will operate; During heating operation, the complete unit will stop Malfunction of voltage dropping for DC busbar U3 During cooling and drying operation, the compressor will stop while indoor fan will operate; During heating operating, the complete unit will stop operation. Malfunction of complete units current detection U5 Cold air prevention protection E9 Not the error code. It’s the status code for the operation. Refrigerant recovery mode Fo Refrigerant recovery. The Serviceman operates it for maintenance. Cool: compressor and outdoor fan stops operation, while indoor fan operates; Heat: compressor, outdoor fan and indoor fan stop operation. Undefined outdoor unit error oE Malfunction of detecting plate(WIFI ) JF Loads operate normally, while the unit can’t be normally controlled by APP. Analysis or processing of some of the malfunction display: 1. Compressor discharge protection Possible causes: shortage of refrigerant; blockage of air filter; poor ventilation or air flow short pass for condenser; the sys tem has noncondensing gas (such as air, water etc.); blockage of capillary assy (including filter); leakage inside four-way valve causes incorrect operation; malfunction of compressor; malfunction of protection relay; malfunction of discharge sen sor; outdoor temperature too high. Processing method: refer to the malfunction analysis in the above section. 2. Low voltage overcurrent protection Possible cause: Sudden drop of supply voltage. 3.Communication malfunction Processing method: Check if communication signal cable is connected reliably. 4. Sensor open or short circuit Processing method: Check whether sensor is normal, connected with the corre sponding position on the controller and if damage of lead wire is found. 5. Compressor over load protection Possible causes: insufficient or too much refrigrant; blockage of capillary and increase of suction temp.; improper running of compressor, burning in or stuck of bearing, damage of discharge valve; malfunction of protector. Processing method: adjust refrigerant amount; replace the capillary; replace the compressor; use universal meter to check if the contactor of compress or is fine when it is not overheated, if not replace the protector. 6. System malfunction i.e.overload protection.When tube temperature(Check the temperature of outdoor heat exchanger when cooling and check the temperatur e of indoor heat exchanger when heating) is too high, protection will be activated. Possible causes: Outdoor temperature is too high when cooling; insufficient outdoor air circulation; refrigerant flow malfunc tion. please refer to the malfunction analysis in the previous section for handling method . 7. IPM module protection Processing method:Once the module malfunction happens,if it persists for a long time and can not be selfcanceled, cut off the power and turn off the unit,and then re-energize the unit again after about 10 min.After repeating the procedure for sever times, if the malfunction still exists,replace the module. 51 Installation and Maintenance Replace outdoor control panel AP1 Supply voltage is unstable Theres circuit malfunction on outdoor units control panel AP1, please replace the outdoor units control panel AP1. 1. Outdoor ambient temperature exceeds the operation range of unit (eg: less than-20 oC for cooling; more than 30 oC or more than 60 oC for heating); 2. Failure startup of compressor? 3. Are wires of compressor not connected tightly? 4. Is compressor damaged? 5. Is main board damaged? 1. Main board of indoor unit is damaged; 2. Detection board is damaged; 3. The connection between indoor unit and detection board is not good;
Service Manual If malfunction occurs,corresponding code will display and the unit will resume normal until protection or malfunction disappears. 52 Installation and Maintenance
9. Maintenance Service Manual 9.2 Procedure of Troubleshooting ●Indoor unit: 1. Malfunction of Temperature Sensor F1, F2 Main detection points: ● Is the wiring terminal between the temperature sensor and the controller loosened or poorly contacted? ● Is there short circuit due to trip-over of the parts? ● Is the temperature sensor broken? ● Is mainboard broken? Malfunction diagnosis process: 53 Installation and Maintenance Start Is the wiring terminal between the temperature sensor and the controller Yes loosened or poorly contacted? Insert the temperature sensor tightly No No Is malfunction eliminated Yes Is there short circuit due to trip- over of the parts Make the parts upright No No Is malfunction Yes eliminated Is the temperature sensor normal according to the resistance table? No Yes Replace it with a temperature sensor with the same model Yes Is malfunction No eliminated Replace the mainboard with the same model. Yes End
Service Manual 9. Maintenance 2. Malfunction of Blocked Protection of IDU Fan Motor H6 Main detection points: ● SmoothlyIs the control terminal of PG motor connected tightly? ● SmoothlyIs the feedback interface of PG motor connected tightly? ● The fan motor can't operate? ● The motor is broken? ● Detectioncircuit of the mainboard is defined abnormal? Malfunction diagnosis process: Measure the voltage of this foot to neutral wire on the mainboard 54 Installation and Maintenance Start While power is off stir the blade No with a tool to see whether the blade rotates smoothly Tighten the screw; reassemble the blade, motor and shaft bearing rubber base sub-assy to make sure there is no foreign object between them Yes No Yes Is malfunction eliminated Check if the connection of PG motor feedback terminal is firm No Insert the control terminal of PG motor tightly Yes No Is malfunction Yes eliminated Check if the connection of PG No motor control terminal is firm Reinstall the blade and motor correctly Yes No Is malfunction Yes eliminated Turn on the unit again; measure whether the output voltage on control terminal for PG motor is more than 50V within 1 min after Yes Yes the louvers are opened Yes Is the motor started up No Replace PG motor No No Yes Is malfunction eliminated Replace the mainboard with the same model End
9. Maintenance Service Manual 3. Malfunction of Protection of Jumper Cap C5 Main detection points: ● Is there jumper cap on the mainboard? ● Is the jumper cap inserted correctly and tightly? ● The jumper is broken? ● The motor is broken? ● Detection circuit of the mainboard is defined abnormal? Malfunction diagnosis process: 55 Installation and Maintenance Start No Appearance of the Is there jumper cap on the mainboard? jumper cap Assemble the jumper cap with the same model Yes No Is malfunction eliminated No Is the jumper cap inserted correctly and tightly? Insert the jumper cap tightly Yes No Is malfunction Yes eliminated Replace the jumper cap with the same model Yes Is malfunction eliminated Yes No Replace the mainboard with the same model End
Service Manual 9. Maintenance 4. Malfunction of Zero-crossing Inspection Circuit Malfunction of the IDU Fan Motor U8 Main detection points: ● Instant energization afte de-energization while the capacitordischarges slowly? ● The zero-cross detectioncircuit of the mainboard is defined abnormal? Malfunction diagnosis process: 56 Installation and Maintenance Start Turn power off for 1minute,the turn back on The unit returns to normal. Conclusion:U8 is displayed due to power off/on while the capacitor discharges slowly. U8 is still displayed No Yes The zero-cross detection circuit of the mainboard is defined abnormal.Replace the mainboard with the same model End
Service Manual 5 . High Temperature and Overload Protection (AP1 below means control board of outdoor unit) E8 Start If the outdoor ambient temperature is higher than 53°C? No is good? No If the indoor and outdoor fan are running normally? Yes Replace outdoor mainboard End 57 Installation and Maintenance Normal protection, please use it after improving the outdoor ambient Yes Unit restarts Yes normally temperature No Improve the radiating environment of Yes Unit restarts unit (clean the heat exchanger and normally remove surrounding obstacles) No Yes Connect normally? Adjust the connection Yes Replace fan Yes Fan capacitor is broken? capacitor No Yes Motor is broken? Replace motor No Replace mainboard
6. Malfunction of detecting plate(WIFI) Start check if the connection wire are correctly connected Yes Replace the detecting plate with the same model Is malfunction eliminated Replace the mainboard Yes No with the same model The end 58 Installation and Maintenance Service Manual
Service Manual ●Outdoor unit: 1.Capacity charging malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor unit) Main detection point: ● Detect if the voltage of L and N terminal of wiring board is between 210AC-240AC by alternating voltage meter; ● Is reactor (L) well connected? Is connection wire loosened or pull-out? Is reactor (L) damaged? Malfunction diagnosis process: Turn on the unit and wait 1 minute Use DC voltmeter to measure the voltage on the two ends of electrolytic capacitor Fault with the voltage testing circuit on control panel AP1 Replace the control panel AP1 Voltage higher than 200V? Y Measure the AC voltage between terminal L and and N on wiring board XT(power supply) Shut down the power and repair the power supply to power on and restart the unit If the fault is eliminated? Voltage within 210VAC~250VAC? N Y restore the range 210VAC~250VAC Y Shut down the power and wait 20 minutes; or use DC voltmeter to measure the voltage N on the two ends of capacitor (test3), until the voltage is lower than 20V Check the connection of reactor (Lin the Electrical Wiring Diagram) Connect the reactor Laccording to Elec- Re-energize and turn on the unit If the fault is eliminated? If the wiring of reactor Lis normal? N trical Wiring Diagr- am correctly Y Replace the control panel AP1 N End 59 Installation and Maintenance Y
2.Diagnosis for anti-high temperature, overload protection (AP1 below is control board of outdoor unit) Main detection point: ● If the outdoor ambient temperature is in normal range; ● If the indoor and outdoor fan is running normal; ● If the radiating environment of indoor and outdoor unit is well. Malfunction diagnosis process: Anti-high temperature, overload protection Normal protection, please use it after improve the outdoor If the outdoor ambient temperature is higher than 53 °C? Y ambient temperature N After the unit de- energized for 20min Improve the radiating environment of unit If the radiating of outdoor and indoor unit is well? Y N 1. Check if fan terminal OFAN is connected well 2. Test if resistance value of any two terminals is less than 1kΩ with ohmic meter If the indoor and outdoor fan work well? N Y Replace fan capacitor C1 Replace control board AP1 Replace outdoorfan End 60 Installation and Maintenance Service Manual
Service Manual
3.IPM protection, phase current overcurrent (the control board as below indicates the control board
of outdoor unit) H5/P5
Mainly detect:
(1) Compressor COMP terminal (2) voltage of power supply (3) compressor
(4) Refrigerant-charging volume (5) air outlet and air inlet of outdoor/indoor unit
Troubleshooting:
Turn on the unit
after energization
Check the connection
between the control board
Whether IPM
protection occurs after the unit has
and the compressor by
N
referring to the electric
operated for a while?
wiring diagram
Check whether wires
of compressor (UVW) are connected
Whether
the voltage between
terminal L and terminal N
of XT is within 210AVC~
Correctly connect the wires of
Y
compressor according to the
correctly
electric wiring diagram, and
then turn on the unit
250VAC?
Measure the resistance value
among three terminals (UVW)
of compressor with a resistance
Check the power
supply voltage and
make the power voltage
measuring meter.
Whether IPM
protection occurs after the unit has
N
operated for a while?
resume to the range
of 210VAC~250VAC
Whether the
resistance value of three terminals
are almost the same.
Y
1. Whether the heat exchangers of indoor unit and outdoor unit are
dirty? Whether the radiation is affected because the unit is
Measure the resistance
between three terminals (UVW)
of compressor and the copper pipe
covered by the objects?
2. When indoor fan and outdoor unit are operate normally?
3. Whether the system pressure is too high?
4. Whether the pressure is because there's too much refrigerant?
with resistance measuring meter
Whether the
resistance value is more than
500ohm?
Correct it one by one
according to the Service
Manual, and then turn on
Whether there's
abnormal phenomenons
Y
described as above?
the unit.
N
Replace the
compressor
N
Y
Whether the unit
can operate normally?
N
Y
Replace control
Y
board
End
61
Installation and Maintenance4. Start-up failure (following AP1 for outdoor unit control board) Mainly detect: ●Whether the compressor wiring is connected correct? ●Is compressor broken? ●Is time for compressor stopping enough? Fault diagnosis process: Power on the unit No Restart it up after 3 minutes Is stop time of the compressor longer than 3 minutes? Yes Does startup fail? Yes Connect the wires as per the connection diagram Are the wires for the compressor connected No correctly? Is connection sequence right? Yes Replace the control panel AP1 No If the fault is eliminated? No Replace the compressor Yes End 62 Installation and Maintenance Service Manual
Service Manual 5. Out of step diagnosis for the compressor (AP1 hereinafter refers to the control board of the outdoor unit) Mainly detect: ●Is the system pressure too high? ●Is the input voltage too low? Fault diagnosis process: unit is powered on. Out of step occurs once the No Is stop time of the compressor longer than 3 minutes? Yes Are the wires for the compressor connected Is the connection made in clockwise correctly? Is connection sequence right? direction? No Yes Connect the wires correctly Replace the control panel AP1 Yes If the fault is eliminated? No Replace the compressor End 63 Installation and Maintenance Out of step occurs in operation capacitor C1 Check if the fan terminal OFAN is connected correctly No Replace the fan Is the outdoor fan working normally? Yes Replace the outdoor fan Yes Remove foreign objects Is the outdoor unit blocked by foreign objects? No Replace the control panel AP1 Yes If the fault is eliminated? No Replace the compressor End
6. Overload and air exhaust malfunction diagnosis (following AP1 for outdoor unit control board) Mainly detect: ●Is the PMV connected well or not? Is PMV damaged? ●Is refrigerant leaked? Fault diagnosis process: 64 Installation and Maintenance Service Manual 20 minutes after the complete unit is powered off Is the terminal FA for the electronic expansion valve Connect the wires correctly No connected correctly? Yes Resistances between the first four pins close to the terminal hole and the fifth pin are almost the same, less than 100 ohm. Replace the electronic expansion valve Yes If the fault is eliminated? No Replace the AP1 control panel Yes If the fault is eliminated? No Coolant leakage, refilling the coolant End
Service Manual 7. Communication malfunction: (following AP1 for outdoor unit control board) Mainly detect: ●Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged? ●Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect well or not, if is there any damage? Fault diagnosis process: Start Did the equipment operate normally before the failure No Yes occurs? Check the wiring of the indoor and outdoor units with reference to the wiring diagram Check wiring inside of the indoor and Yes Is the connection right? outdoor units No No Correctly connect the corresponding wires for The AP1 voltage detection circuit is at fault Yes Are wires broken? the indoor and outdoor units with reference to the wiring diagram No If the fault is eliminated? Check the communication No circuit of the outdoor unit If the fault is eliminated? Replace the main board The communication Yes AP1 of the outdoor unit circuit is abnormal No If the fault is eliminated? No Replace the main board of the indoor unit Yes Yes Yes End 65 Installation and Maintenance
8. Malfunction of Overcurrent Protection Main detection points: ● Is the supply voltage unstable with big fluctuation? ● Is the supply voltage too low with overload? ● Hardware trouble? Malfunction diagnosis process: Start Yes Yes Is the supply voltage unstable of the rated voltage on the nameplate No No Yes Is the supply voltage too low Adjust the supply voltage to maintain it within normal range with overload? No No Is the indoor / outdoor heat exchanger dirty,or are the air inlet Yes Clean the indoor and outdoor heat exchangers and remove the blockage of air inlet and outlet and outlet blocked? No No The fan is abnormal? Fan speed is too low or fan doesnt rotate Yes Check the motor and reinstall the motor to have the fan run normally No No Measure the current of live wire on the main board with a clamp ampere No Replace the mainboard with the same model meter. Is the current higher than the value of the overcurrent protection? No Yes Is there blockage inside the system? Yes Flush the heat exchangers with high pressure nitrogen (Filth blockage, ice plug, greasy blockage, the cut off valve hasnt been opened completely) No No Is the compressor running abnormally? Is there abnormal sound or oil leakage; Is the temperature of the shell too high, Yes Replace the compressor etc.? No Replace the mainboard with the same model End 66 Installation and Maintenance Service Manual eliminated Is malfunction Yes eliminated Is malfunction Yes Is malfunction eliminated Is malfunction Yes eliminated eliminated Is malfunction Yes Yes Is malfunction eliminated eliminated Is malfunction Yes
9. Maintenance Service Manual 9.3 Troubleshooting for Normal Malfunction 1. Air Conditioner Can't be Started Up Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Confirm whether its due to power failure. If yes, wait for power recovery. If not, check power supply circuit and make sure the power plug is connected well. Wrong wire connection between indoor unit and outdoor unit, or poor connection for wiring terminals No power supply, or poor connection for power plug After energization, operation indicator isnt bright and the buzzer can't give out sound Under normal power supply circumstances, operation indicator isnt bright after energization Make sure the air conditioner is grounded reliably Make sure wires of air conditioner is connected correctly Check the wiring inside air conditioner. Check whether the insulation layer of power cord is damaged; if yes, place the power cord. Model selection for air switch is improper After energization, air switch trips off Select proper air switch Electric leakage for air conditioner After energization, room circuit breaker trips off at once After energization, operation indicator is bright, while no display on remote controller or buttons have no action. Malfunction of remote controller 2. Poor Cooling (Heating) for Air Conditioner Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Set temperature is improper Observe the set temperature on remote controller Adjust the set temperature Rotation speed of the IDU fan motor is set too low Small wind blow Set the fan speed at high or medium Filter of indoor unit is blocked Check the filter to see its blocked Clean the filter Check whether the installation postion is proper according to installation requirement for air conditioner Installation position for indoor unit and outdoor unit is improper Discharged air temperature during cooling is higher than normal discharged wind temperature; Discharged air temperature during heating is lower than normal discharged wind temperature; Units pressure is much lower than regulated range Refrigerant is leaking Malfunction of 4-way valve Blow cold wind during heating Replace the 4-way valve Discharged air temperature during cooling is higher than normal discharged wind temperature; Discharged air temperature during heating is lower than normal discharged wind temperature; Unitt pressure is much lower than regulated range. If refrigerant isnt leaking, part of capillary is blocked Malfunction of capillary Flow volume of valve is insufficient The pressure of valves is much lower than that stated in the specification Open the valve completely Malfunction of horizontal louver Horizontal louver can't swing Refer to point 3 of maintenance method for details Malfunction of the IDU fan motor The IDU fan motor can't operate Refer to troubleshooting for H6 for maintenance method in details Malfunction of the ODU fan motor The ODU fan motor can't operate Refer to point 4 of maintenance method for details Malfunction of compressor Compressor can't operate Refer to point 5 of maintenance method for details 3. Horizontal Louver Can't Swing Possible Causes Discriminating Method (Air conditioner Status) Troubleshooting Wrong wire connection, or poor connection Check the wiring status according to circuit diagram Stepping motor is damaged Stepping motor can't operate Repair or replace stepping motor Main board is damaged Others are all normal, while horizontal louver can't operate Replace the main board with the same model 67 Installation and Maintenance Check the circuit according to circuit diagram and connect wires correctly. Make sure all wiring terminals are connected firmly Replace batteries for remote controller Repair or replace remote controller Adjust the installation position, and install the rainproof and sunproof for outdoor unit Find out the leakage causes and deal with it. Add refrigerant. Replace the capillary Connect wires according to wiring diagram to make sure all wiring terminals are connected firmly
9. Maintenance 4. ODU Fan Motor Can't Operate Possible causes Discriminating method (air conditioner status) Troubleshooting Wrong wire connection, or poor connection Check the wiring status according to circuit diagram Measure the capacity of fan capacitor with an universal meter and find that the capacity is out of the deviation range indicated on the nameplate of fan capacitor. Capacity of the ODU fan motor is damaged Power voltage is a little low or high Use universal meter to measure the power supply voltage. The voltage is a little high or low Suggest to equip with voltage regulator When unit is on, cooling/heating performance is bad and ODU compressor generates a lot of noise and heat. Motor of outdoor unit is damaged 5. Compressor Can't Operate Possible causes Discriminating method (air conditioner status) Troubleshooting Wrong wire connection, or poor connection Check the wiring status according to circuit diagram Measure the capacity of fan capacitor with an universal meter and find that the capacity is out of the deviation range indicated on the nameplate of fan capacitor. Capacity of compressor is damaged Power voltage is a little low or high Use universal meter to measure the power supply voltage. The voltage is a little high or low Suggest to equip with voltage regulator Coil of compressor is burnt out Use universal meter to measure the resistance between compressor terminals and its 0 Repair or replace compressor Cylinder of compressor is blocked Compressor can't operate Repair or replace compressor 6. Air Conditioner is Leaking Possible causes Discriminating method (air conditioner status) Troubleshooting Drain pipe is blocked Water leaking from indoor unit Eliminate the foreign objects inside the drain pipe Drain pipe is broken Water leaking from drain pipe Replace drain pipe Wrapping is not tight Water leaking from the pipe connection place of indoor unit Wrap it again and bundle it tightly 7. Abnormal Sound and Vibration Possible causes Discriminating method (air conditioner status) Troubleshooting When turn on or turn off the unit, the panel and other parts will expand and theres abnormal sound Theres the sound of "PAPA" Normal phenomenon. Abnormal sound will disappear after a few minutes. When turn on or turn off the unit, theres abnormal sound due to flow of refrigerant inside air conditioner Water-running sound can be heard Normal phenomenon. Abnormal sound will disappear after a few minutes. Foreign objects inside the indoor unit or therere parts touching together inside the indoor unit Remove foreign objects. Adjust all parts position of indoor unit, tighten screws and stick damping plaster between connected parts Foreign objects inside the outdoor unit or therere parts touching together inside the outdoor unit Theres abnormal sound fro indoor unit Remove foreign objects. Adjust all parts position of outdoor unit, tighten screws and stick damping plaster between connected parts Short circuit inside the magnetic coil Theres abnormal sound fro outdoor unit During heating, the way valve has abnormal electromagnetic sound Replace magnetic coil Abnormal shake of compressor Outdoor unit gives out abnormal sound Adjust the support foot mat of compressor, tighten the bolts Abnormal sound inside the compressor Abnormal sound inside the compressor 68 Installation and Maintenance Service Manual Connect wires according to wiring diagram to make sure all wiring terminals are connected firmly Replace the capacity of fan Change compressor oil and refrigerant. If no better, replace the compressor with a new one Connect wires according to wiring diagram to make sure all wiring terminals are connected firmly Replace the compressor capacitor If add too much refrigerant during maintenance, please reduce refrigerant properly. Replace compressor for other circumstances.
Service Manual 10. Exploded View and Parts List 10.1 Indoor Unit 7/9K 39 40 41 42 2 1 3 4 6 38 37 36 35 34 33 23 24 25 26 27 28 29 30 31 32 The component picture is only for reference; please refer to the actual product. 69 Installation and Maintenance 5 7 8 9 10 11 12 13 14 15 16 18 17 19 20 21 22
Service Manual 10. Exploded View and Parts List NO. Description 1 Evaporator Support 2 Axile Bush Sub-assy 3 Cross Flow Fan 4 Evaporator Assy 5 Motor Press Plate 6 Wall Mounting Frame Sub-assy 7 Fan Motor 8 Rear Case 9 Connecting pipe clamp 10 Screw Cover 11 Plasmacluster Ion 12 Rubber Plug (Water Tray) 13 Air Louver 14 Crank 15 Stepping Motor 16 Stepping Motor 17 Air Louver (Auto) 18 Stepping Motor 19 Electric Box Assy 20 Wire Clamp 21 Electric Box 22 Earthing 23 Terminal Board 24 Cable Clamp 25 Main Board 26 Jumper 27 Plug Pin 28 Helicoid Tongue 29 Guide Louver (lower) 30 Guide Louver (upper) 31 Electric Box Cover2 32 Display Board 33 Front Panel 34 Front Case 35 Filter Sub-Assy 36 Swing Lever 37 Left Axile Bush 38 Drainage Hose 39 Power Cord 40 Connecting Cable 41 Connecting Cable 42 Remote Controller Some models may not contain some parts, please refer to the actual product. 70 Installation and Maintenance