Pioneer WYT012ALUI17RL Service Manual

Inverter air conditioner

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Air Conditioner Service Manual

Inverter Air Conditioner

Service Manual

Models:

WYT012ALUI17RL WYT012GLUI17RL

WYT018GLUI17RL WYT024GLUI17RL

WYT036GLUI17RL

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Summary of Contents for Pioneer WYT012ALUI17RL

Page 1 Air Conditioner Service Manual Inverter Air Conditioner Service Manual Models: WYT012ALUI17RL WYT012GLUI17RL WYT018GLUI17RL WYT024GLUI17RL WYT036GLUI17RL...
Page 2 Air Conditioner Service Manual CONTENTS Part Ⅰ Technical Information ........................... . . 3 1. Important Notice ..........................3 2. Product Dimensions ..........................4 3. Refrigeration C ycle D iagram ........................5 4. Wiring Diagram ............................6 5. Electronic Controller Introduction ......................9 5.1 Electronic Controller ........................11 Part Ⅱ...
Page 3 Air Conditioner Service Manual PartⅠTechnical Information 1. Important Notice This service manual is intended for individuals with adequate electrical, electronic, and mechanical experience. Any attempt to repair the appliance may result in personal injury and property damage. The manufacturer or seller cannot be responsible for the interpretation of this information, nor can it assume any liability in connection with its use.
Page 4 Air Conditioner Service Manual 2. Product Dimensions Indoor Unit: Outdoor Unit: Outdoor Unit (mm/inch) Indoor Unit （ mm/inch ） Model 48.5 WYT012ALUI17RL /30.59 /8.07 9.84 /28.03 /19.61 /9.21 16.34 /11.46 /8.86 /1.91 /2.05 /205 48.5 WYT012GLUI17RL /30.59 8.07 9.84 /28.03 /19.61...
Page 5 Air Conditioner Service Manual 3. Refrigeration Cycle Diagram Heat Pump Check valve Liquid side 2-way valve Capillary Heat exchange Heat exchange (Condenser) (Evaporator) Gas side 3-way valve 4-way valve Muffler Muffler Heating Cooling Compressor Liquid side 2-way valve Electronic expansion valve Heat exchange Heat exchange (Condenser)
Page 6 Air Conditioner Service Manual Diagram Wiring Indoor Unit: WT012ALUI17HLD | WT012GLUI17HLD | WT018GLUI17HLD | WT024GLUI17HLD Indoor Unit: WT036GLUI17HLD...
Page 7 Air Conditioner Service Manual Outdoor Unit: YN012ALUI17RPD Outdoor Unit: YN012GLUI17RPD | YN018GLUI17RPD | YN024GLUI17RPD...
Page 8 Air Conditioner Service Manual Outdoor Unit: YN036GLUI17RPD...
Page 9 Air Conditioner Service Manual 5. Electronic Controller Introduction 5.1 Remote Controller The appearance and some functions of the remote controller may differ. The shape and position of the switches and indicators may be different according to the model, but their function is the same.
Page 10 Air Conditioner Service Manual Remote Controller Display The appearance and some functions of the remote controller may differ. The shape and position of the buttons and indicators may vary according to the model, but their function is the same. The unit will beep to confirm the correct reception of each button.
Page 11 Air Conditioner Service Manual 5.2 Electronic Controller RT --- Room Temperature IPT --- Indoor Pipe (Coil) Temperature ST --- Indoor Setting Temperature OPT --- Outdoor Pipe Temperature OAT --- Outdoor Ambient Temperature ODT --- Outdoor Discharge Temperature CRT --- Compensated Room Temperature IDU --- Indoor Unit ODU --- Outdoor Unit Note: When finishing installation, the air inlet on the unit and airflow throughout the room can vary in temperature.
Page 12 Air Conditioner Service Manual 4. When ODU failure or stops for protection, IDU works as preset. Anti-Frosting Protection: Control the unit operation frequency and frequency-changing rate to achieve anti-frosting protection. 1). Frequency Slowly Increasing(FSI): a. If 43°F≤ IPT＜45 °F , the frequency increasing rate is 1Hz/60s, slowly increasing operation speed. b.
Page 13 Air Conditioner Service Manual c. Changed to Fan mode 5). Under normal operation, the compressor can be stopped by program only working after 7 min once it starts up. 6). In the process of unit operation, once the compressor is ceased, it should be a 3-min delay until the next procedure. 3.
Page 14 Air Conditioner Service Manual COMPRESSOR 4-WAY VALVE OUTDOOR FAN Defrosting max time Defrosting end off: The compressor stops working, restarts, and begins working again after 50s delay; 7. Cold Air Prevention: This function prevents cold air from being discharged when the heating operation starts up. 1).
Page 15 Air Conditioner Service Manual 3). Press “▲” or “▼” to set the start time for the unit. 4). Set other function as MODE, FAN SPEED, SWING, etc. 5). Press TIMER once again to confirm the TIME ON setting. TIMER OFF 1).
Page 16 Air Conditioner Service Manual The failure and times for protection will be eliminated immediately once the unit has switched Off or changed to Fan or Heating mode. Note: If the defective failure can’t be recovered, the failure can’t be eliminated even if the operation mode has changed.
Page 17 Air Conditioner Service Manual PART Ⅱ Installation and Maintenance 1. Notes for Installation and Maintenance Safety Precautions Important! Read the safety precautions carefully before installation and maintenance. The following contents are very important for installation and maintenance. Follow the instructions below: •...
Page 18 Air Conditioner Service Manual 6) Make sure no foreign objects are left in the unit after finishing installation. Improper installation may lead to fire hazard, explosion, electric shock, or injury. Safety precautions for installing and relocating the unit. To ensure safety, be mindful of the following precautions. Warnings When installing or relocating the unit, be sure to keep the refrigerant circuit free from air or substances other than the specified refrigerant.
Page 19 Air Conditioner Service Manual is the required minimum room area, in m2; A is the room area, in m2; LFL is the lower flammable limit, in kg/m3; h0 is the installation height of the appliance, in meters for calculating M or A , 1.8 m for wall mounted;...
Page 20 Air Conditioner Service Manual Mind static electricity Must wear protective clothing and anti-static gloves Don`t use mobile phone Installation Safety • Refrigerant Leak The left picture is the schematic diagram of a Detector • Appropriate Installation Refrigerant Leak Detector. Location Caution: •...
Page 21 Air Conditioner Service Manual Carry fire extinguisher(s) during installation and maintenance. On the maintenance site, ensure there are two or more kinds of dry powder, carbon dioxide, and Fire Extinguisher foam fire extinguishers. The items should have eye-catching labels and be placed at stipulated positions.
Page 22 Air Conditioner Service Manual • If the product is damaged to the extent that the refrigerant system must be opened for maintenance, carry the product back to the maintenance station. Welding refrigerant pipes or conducting similar operations are prohibited at the user’s site. •...
Page 23 Air Conditioner Service Manual 8). Maintenance of Electrical Components • Use a special leak detector to check whether the location of the maintained electrical parts has a refrigerant leak. • It is prohibited to refit, remove, or cancel any component with the safety protection function after finishing maintenance.
Page 24 Air Conditioner Service Manual 2 Installation 2.1 Installation Dimension Diagram Space to the wall At least 15cm At least 15cm Space to the wall Space to the obstruction Space to the floor Space to the obstruction Drainage pipe Connecting wire...
Page 25 Air Conditioner Service Manual 2.2 Accessory Remote Controller Remote Controller Batteries Vinyl Tape Supporter Drain Hose Hole Cover Screw Insulation Material 2.3 Tools Tool Name Tool Name Picture Tool Name Picture Picture Standard Pipe Cutter Vacuum Pump Wrench Screw Adjustable/ Drivers Crescent Safety Glasses...
Page 26 Air Conditioner Service Manual 2.4 Position Indoor Unit 2.5 Electricity and Wiring • Install the indoor unit level on a strong wall that Safety Precautions is not subject to vibrations. 1) Follow the electric safety regulations when • The inlet and outlet ports should not be installing the unit.
Page 27 Air Conditioner Service Manual The hole must slope downwards towards the exterior. 12K(770X) Note: Keep the drain pipe down towards the direction of the wall hole, otherwise leakage may occur. 2.6.3 Electrical Connections - Indoor Unit 1). Lift the front panel. 2).
Page 28 Air Conditioner Service Manual 4.) When extending the drain hose at the indoor unit, install the drain pipe. Wrap the insulation material around the connecting portion. • Overlap the connection pipe insulation material and indoor unit pipe insulation material. Bind them together with vinyl tape so there is no gap.
Page 29 Air Conditioner Service Manual 4). If the piping is installed to the right, the pipes, power cable, and drain hose must be lagged and 1). Fasten the drain port in the 1in hole placed in secured onto the rear of the unit with a pipe the part of the unit as shown in the picture.
Page 30 Air Conditioner Service Manual connection pipes flare nuts 2.9 Final Test liquid tap gas tap 1. Preparation of Test Operation indoor unit • The client approves the air conditioner Liquid valve gas valve installation. • Specify the important notes for the air conditioner to the client.
Page 31 Air Conditioner Service Manual 3. Maintenance 3.1 Failure code Code Reason Remark IDU and ODU communication failure The IDU and ODU wiring connection correct? IDU room temperature sensor failure (IDU RT IDU sensor and PCB failure) IDU coil temperature sensor failure (IDU IPT IDU sensor and PCB failure) ODU coil temperature sensor failure (OPT)
Page 32 Air Conditioner Service Manual PFC protection Please check the troubleshooting for detail The compressor lack of phase/Anti-phase Please check the troubleshooting for detail protection IPM module temperature protection Please check the troubleshooting for detail 4-way value reversing abnormal Please check the troubleshooting for detail The module temperature test circuit failure ODU PCB The compressor phase-current test circuit...
Page 33 Air Conditioner Service Manual 3.2 Troubleshooting 3.2.1 E0 --- IDU and ODU Communication Failure Start Display E0 IDU wiring Check and E0 disappear? connection correct? reconnect Communication, earth Replace and E0 disappear? wiring, and connection reconnect in good condition? ODU wiring Check and connection correct? E0 disappear?
Page 34 Air Conditioner Service Manual 3.2.2 E1, E2 --- IDU Room Temperature Sensor and/or Coil Temperature Sensor Failure Start Display E1 or E2 Is the sensor Reconnect well-connected to PCB? E1/E2 disappear? Use Multimeter to check sensor. Is Replace the sensor it open or short circuit? Malfunction...
Page 35 Air Conditioner Service Manual 3.2.3 E4 --- AC Cooling System Abnormal (Gas Not Enough) Start Display E4 Check the pressure AC pressure correct? Is the sensor short or (Cooling:0.8-1.3Mpa open? /Heating:2.0-3.6Mpa) Replace the sensor Are the valves open or not? Replace the main PCB Open the valves Lower than 0.8 Mpa in...
Page 36 Air Conditioner Service Manual 3.2.4 E6 --- IDU Ventilation Failure (PG and DC Fan Motor Only) Start Display E6 Turn the fan blades by hand while power off Adjust the motor and blade Can the fan blades run assembly so that rotor can smoothly? run smoothly E6 disappear?
Page 37 Air Conditioner Service Manual 3.2.5 E3, E7 or E8 --- ODU Coil Temperature Sensor, Ambient Temperature Sensor, or Discharge Temperature Sensor Failure When any of the sensor resistance is open or short circuit , the unit will display the failure code as E3, E7, or E8. The IDU and ODU turns off.
Page 38 Air Conditioner Service Manual 3.2.6 E9 --- ODU IPM /Compressor Drive Fault If the unit stops working for IPM protection (P0) 6 times consecutively, it will display the E9 error. The unit can't be recovered to operation, except by pressing the On/Off button. Display E9 Cut the power supply again, then restart unit.
Page 39 Air Conditioner Service Manual 3.2.7 EF --- ODU DC Fan Motor Failure Shut off Check the fan blade by Reinstall the DC motor hand. Can it rotate freely? Works normal? Is the fan motor Reconnect well-connected to PCB? Works normal? 1.
Page 40 Air Conditioner Service Manual 3.2.8 EU --- ODU Voltage Test Sensor Failure After power relay works and when tested voltage effective value less than 50V for 3s continuously, the unit will display EU. Start Display EU Test voltage btw ODU Check while voltage terminal L/N.
Page 41 Air Conditioner Service Manual 3.2.9 P0 --- IPM Protection When overheat or over-current for IPM, the AC unit will display P0 protection. Display P0 Restart unit. It works normal? Wiring connection Reconnect U/V/W correct? P0 disappear? Is ODU fan motor not Replace ODU fan Can the compressor start working or too slowly?
Page 42 Air Conditioner Service Manual 3.2.10 P1 --- Over/Under-Voltage Protection 1. Test voltage between L&N. When the power supply V ＞AC260V or V ＜AC150V, the AC will display P1 protection. The unit will recover back to previous status while V＞AC155V. 2. Test voltage on the big size electrolytic capacitor of ODU PCB. When DC busbar voltage V＞DC420V or V＜DC150V, the unit will recover back to previous status while DC190V＜V＜DC410V Display P1 Wait until the AC...
Page 43 Air Conditioner Service Manual 3.2.11 P2 Over-Current Protection When the AC unit running current is more than I max , it will stop and display P2 protection. Note: For different AC model, I max has difference valve. Display P2 Replace fan motor IDU fan motor works? P2 disappear? Is IDU filter or ODU...
Page 44 Air Conditioner Service Manual 3.2.12 P4 --- ODU Discharge Temperature Overheating Protection Display P4 Is the discharge Replace the discharge temperature P4 disappear? pipe sensor over than 230°F? Is the ODU Normal protection temperature higher than 140°F? Adjust ODU Enough space for Is the ODU location Does the unit operate? installation...
Page 45 Air Conditioner Service Manual 3.2.13 P5 --- Sub-Cooling Protection on Cooling/Dry Mode In Cooling or Dry mode, when the IDU evaporator coil temperature IPT＜34°F continuously for 3 min after the compressor starts up for 6 min, the CPU will switch Off outdoor unit and show P5 failure code. Display P5 Switch On unit after mins...
Page 46 Air Conditioner Service Manual 3.2.14 P6 --- Overheating Protection on Cooling Mode On Cooling or Dry mode, when ODU condenser coil temperature OPT≥144°F, MCU will switch Off outdoor unit and show P6 failure code. Display P6 Does IDU fan motor Replace fan motor Is fan motor broken? work normal?
Page 47 Air Conditioner Service Manual 3.2.15 P7 --- Overheating Protection on Heating Mode On Heating mode, when IDU evaporator coil temperature IPT≥144°F, ODU PCB will switch Off outdoor unit and show P7 failure code. Display P7 Does the ODU Is fan motor Replace fan motor fan motor work broken?
Page 48 Air Conditioner Service Manual 3.2.16 P8 --- Outdoor Over-Temperature/Under-Temperature Protection When the environment temperature is the below condition, the compressor will stop working. After 200s delay, the IDU will show P8 failure code. (1). On Cooling or Dry mode: ODU ambient temperature: OAT＜-4°F or OAT＞145°F (2).
Page 49 Air Conditioner Service Manual 3.2.17 P9 --- The Compressor Driving Protection (The Compressor Load Abnormal) When compressor starts up or in the process of operation, if: (1). MCU can’t test the feedback signal from compressor, or (2). Tested an abnormal signal from compressor, or (3).
Page 50 Air Conditioner Service Manual 3.2.18 F4 --- Cooling System Gas Flow Abnormal Protection When the compressor starts up, the unit will check the variation of the IDU coil temperature. If the installer forgets to open the 2-way or 3-way valve on ODU, the gas can’t flow in the cooling system. The unit will show F4 protection.
Page 51 Air Conditioner Service Manual 3.2.19 F5 --- PFC Protection PFC Over-Current Protection F5 Code Check the power supply. Is it Display F5 by abnormal? (This is normal random? protection) Display F5 frequently Switch Off the unit for 3 mins. Still F5? Re-switch On Still F5? Replace ODU PCB...
Page 52 Air Conditioner Service Manual 3.2.20 F6 Compressor Lack of Phase / Anti-Phase Protection If ODU PCB can’t test one or even three phase of compressor current, it will show F6 protection. Display F6 Check compressor Reconnect wiring connector. Is it well-connected? Problem solved? Is compressor wiring in...
Page 53 Air Conditioner Service Manual 3.2.21 F7 --- Module Temperature Protection IPM over-temperature protection, when IPM temperature is more than 203°F, the unit will show F7. Display F7 Is IPM well- Is there any dust or Clean or adjust the gap connected to heat gap between IPM and between IPM and heat sink...
Page 54 Air Conditioner Service Manual 3.2.22 F8 --- 4-Way Value Reversing Abnormal On Heating mode, if the IDU coil temperature tested lower than Room temperature 41°F or even more after the compressor works for 8 min, the unit will show F8 code. Display F8 Is the 4-way valve Reconnect...
Page 55 Air Conditioner Service Manual 3.2.23 Fy --- Gas Leakage Protection After the compressor works in high frequency for 9 min, if the temperature on the IDU evaporator and ODU condenser only has a little variation comparing previously, but the compressor discharge temperature is on high level, then the unit will show Fy failure code.
Page 56 Air Conditioner Service Manual 3.2.24 CL --- Duty Caution Air filter duty, the unit operation cumulative time 500 hours. The controller will confirm the filter is dirty by displaying CL. Display CL Is the air filter dirty? Clean the air filter Cut off the power supply again...
Page 57 Air Conditioner Service Manual 4. Disassembly IDU and ODU 4.1. IDU Disassembly Steps Reference Photo 1. Before disassembly The original status. 2. Disassemble front panel, display board, and Wi-Fi module A. Open front panel. Display B. Remove 1 screw, then take the display box out from the panel.
Page 58 Air Conditioner Service Manual 4. Remove the electric control box cover Unfix 1 screw on the electric box cover, then remove the cover. The Fix Screw 5. Remove the filter Push the filter upwards a little. You can take it out from the unit.
Page 59 Air Conditioner Service Manual 7. Disassemble the electric control box Electric control box A. Remove the RT and IPT from the evaporator. B. Unscrew all the earth ground wirings on the evaporator. C. Take all the connectors out from the PCB. D.
Page 60 Air Conditioner Service Manual 9. Disassemble the evaporator Screws Screws + Motor Cover A. Unfix 2 screws on the left side, as shown as picture. B. Unfix 2 screws on the right side of the motor cover/right support plate. C. Take the evaporator out from the unit by uplifting the input/output pipes slightly.
Page 61 Air Conditioner Service Manual 4.2 ODU Assembly Step Reference Picture 1. Remove the PCB cover, valve cover, and top cover 1). Unfix 1 screw on the PCB cover, then you can remove the cover from the unit. 2). Unfix 1 screw on the valve cover, and then you can take it out.
Page 62 Air Conditioner Service Manual Separate the ODU middle plate and base plate. Lift the front panel so you can take it out from the unit. 3. Disassemble the left and right plate Unfix screws btw right plate, electric box assembly, valve plate, and base plate.
Page 63 Air Conditioner Service Manual 4. Disassemble the axis fan blade Unscrew the fan blade nut. Remove the blade. 5. Disassemble the electric box Unfix the screws on the electric box and motor supporter, etc. Loosen the wiring clamp, then you can take the control box out.
Page 64 Air Conditioner Service Manual 7. Disassemble the separate plate Unfix the screw on the separate plate and unit, then take it out. 8. Disassemble the 2-way and 3-way valve Unfix the screws on the valve plate and base. You can take the 2-way and 3- way valve out by welding.
Page 65 Air Conditioner Service Manual 10. Disassemble the compressor Unscrew the nuts and remove the compressor. 11. Remove the fan motor and fan supporter Unfix the screws on the fan motor and supporter, then remove the supporter of the base plate. Note: Pay attention to the motor wiring.
Page 66 Air Conditioner Service Manual APPENDIX Appendix 1 Comparison Table of Celsius-Fahrenheit Temperature Fahrenheit Fahrenheit Fahrenheit Celsius Celsius Celsius Display Fahrenheit Display Fahrenheit Display Fahrenheit Temperature Temperature Temperature ℃ ℃ ℃ (℉) (℉) (℉) (℉) (℉) (℉) 60.8 69/70 69.8 78/79 78.8 62/63 62.6...
Page 67 Air Conditioner Service Manual Appendix 3 Pipes Flaring Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure: A. Cut the pipes and cable 1) Use the piping kit accessory or pipes purchased locally. 2) Measure the distance between the indoor and outdoor units.
Page 68 Air Conditioner Service Manual Appendix 4 Thermistor Temperature Characteristics 1). Indoor and outdoor units exchange temperature and outside air temperature sensor temperature characteristics TEMP. R min R(t) R max TEMP. R min R(t) R max TEMP. R min R(t) R max (k Ohm) (k Ohm) (k Ohm)
Page 69 Air Conditioner Service Manual 8.545 8.792 9.044 1.328 1.374 1.421 0.319 0.333 0.349 8.199 8.431 8.667 1.287 1.332 1.378 0.311 0.325 0.340 7.870 8.087 8.308 1.247 1.291 1.336 0.303 0.317 0.332 7.554 7.758 7.965 1.208 1.251 1.295 0.296 0.309 0.324 7.254 7.445 7.639...
Page 70 Air Conditioner Service Manual 91.548 103.469 115.391 8.516 9.061 9.606 1.400 1.455 1.509 86.956 98.138 109.320 8.194 8.711 9.228 1.358 1.412 1.465 82.617 93.108 103.600 7.886 8.376 8.866 1.317 1.370 1.423 78.516 88.362 98.209 7.591 8.056 8.520 1.277 1.329 1.382 74.640 83.883 93.126...
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