DUCTLESS MINI SPLIT SYSTEM AIR CONDITIONER / HEAT PUMP WYT Inverter Series For 9,000-36,000 BTU/hr Systems Service Manual CS78421-548-754 IMPORTANT NOTICE: Please read this manual carefully before installing or operating your new air conditioning system. Be sure to save this manual for future reference.
Air Conditioner Service Manual Table of Contents 1. Important Notice 2. Product Dimensions 3. Refrigeration cycle diagram 4. Operation details 5. Wiring diagram 6. Explosion view and parts 7. Precaution 8. Names of parts 9. Installation 10.
Air Conditioner Service Manual 1. Important Notice This service manual is intended for use by individuals possessing adequate backgrounds of 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.
Air Conditioner Service Manual 2. Product Dimensions Indoor Unit: Model WT009GLFI19HLD WT012GLFI19HLD WT009ALFI19HLD WT012ALFI19HLD WT018GLFI19HLD WT024GLFI19HLD WT036GLFI19HLD Indoor unit(mm/inch) A B 811(31.9) 292(11.5) 292(11.5) 811(31.9) 811(31.9) 292(11.5) 811(31.9) 292(11.5) 1010(39.8) 315(12.4) (46.7) 340(13.4) 1186 1186(46.7) 340(13.4) C 203(7.99) 203(7.99) 203(7.99) 203(7.99) 220(8.7) 258 (10.2) 258(10.
Air Conditioner Service Manual Outdoor Unit: Model YN009GLFI19RPD YN012ALFI19RPD YN009ALFI19RPD YN012ALFI19RPD YN018GLFI19RPD YN024GLFI19RPD YN036GLFI19RPD D 787(31.0) 787(31.0) 810(31.9) 810(31.9) 863(34) 927(36.5) 975(38.4) E 498(19.6) 498(19.6) 549(21.6) 549(21.6) 602(23.7) 699(27.5) 808(31.8) Outdoor unit(mm/inch) F G I 290(11.4) 415(16.3) 225(8.9) 290(11.4) 415(16.3) 225(8.9) 305(12.0) 433.8(17.1) 278(10.9) 305(12.0) 433.8(17.1) 278(10.9) 349(13.7) 516(20.3) 314(12.4) 380(15) 586(23) 347.5(13.
Air Conditioner Service Manual 3.
Air Conditioner Service Manual 4. Operation Details Remote controller 1 ON/OFF button To switch the conditioner on and off. 2 ECO button In cooling mode,press this button ,the temperature will increase 2 on the base of setting temperature: In heating mode, press this button, the temperature will decrease 2 on the base of setting temperature. 3 MODE button To select the mode of operation. 4 FAN SPEED button 1 2 3 4 5 6 To select the fan speed of auto/low/mid/high.
Air Conditioner Service Manual 4.2 Electronic Controller 4.2.1 Safety Protection (1) Time Delay for Safety protection 3 minutes delay for compressor ---The compressor is ceased for 3minutes before restarting to balance the pressure in the refrigeration cycle in order to protect the compressor.
Air Conditioner Service Manual down, the compressor running frequency will go down. When room temperature is lower than set temperature, the compressor will run at very low frequency. In general, unit will change its running frequency according to δt to make room temperature closing to set temperature . (2) Outdoor temperature affects running frequency of the compressor Outdoor temperature affect compressor’s running frequency.
Air Conditioner Service Manual In heating operation, if air conditioner turn off, the indoor fan motor will run most for 30 seconds since the stop of compressor. 2) Auto fan control (heating) In heating mode (include in “FEEL” mode), fan speed is determined by δt as the following: RT-ST ℃(℉) 3.5(38.3) δt come up δt come down 3.5 High fan 3.0(37.4) 1.5(34.7) 1.5 Min fan 1.0(33.
Air Conditioner Service Manual (5) Indoor exchanger overheat protection When Indoor exchanger Temperature (IPT)is higher than 55℃(131℉) , unit comes into indoor exchanger overheat protection. The compressor drops its frequency towardto F1 level until IPT≤ 52℃(125.6℉) If IPT≤ 52℃(125.6℉) and keep for 5 minutes, control system doesn’t limit running frequency. If IPT>62℃(143.6℉), control system shut down compressor, and recover while IPT drop less than 50℃(122℉). 4.2.
Air Conditioner Service Manual Error list Failure Type LED Code DigitalLED Code Indoor and outdoor communication fault RUN、TIMER –both winking E0 Outdoor communication failure RUN、TIMER –both winking EC Indoor room temperature sensor (IRT) fault RUN-1 time/8s E1 Indoor coil temperature sensor (IPT) fault RUN-2 times /8s E2 Outdoor coil temperature sensor (OPT) RUN-3 times /8s E3 System abnormity RUN-4 times /8s E4 Model configuration wrong RUN-5 times /8s E5 Indoor fan motor fault R
Air Conditioner Service Manual Display on outdoor power source board: blink time (n) Failure 1 IPM protection 2 Over voltage /lower voltage 3 Overcurrent 4 Exhaust over temperature protection 5 Outdoor coil over temperature protection 6 Drive fault and protection (V1，VP1) 7 Communication fault with indoor unit 8 Compressor overheat fault (compressor top switch) 9 Short-circuit / open-circuit fault of outdoor temperature sensor 10 Short circuit / open-circuit fault of outdoor heat exch
Air Conditioner Service Manual 5.
Air Conditioner Service Manual MODEL: WYT012GLFI19RL θ θ θ POWER SOURCE BOARD OUTDOOR UNIT RED RED U V W θ θ θ 13
Air Conditioner Service Manual WYT009GLFI19RL,WYT018GLFI19RL,WYT024GLFI19RL , WYT036GLFI19RL INDOOR UNIT POWER SOURCE BOARD OUTDOOR UNIT RED RED U V W θ θ θ 14
Air Conditioner Service Manual 7. Precaution 7.1 SAFETY RULES AND RECOMMENDATIONS FOR THE INSTALLATION Read this guide before installing and using the appliance. During the installation of the indoor and outdoor units the access to the working area should be forbidden to children. Unforeseeable accidents could happen. Make sure that the base of the outdoor unit is firmly fixed. Check that air cannot enter the refrigerant system and check for refrigerant leaks when moving the air conditioner.
Air Conditioner Service Manual Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision. 7.2 SAFETY RULES AND RECOMMENDATIONS FOR THE USER Do not try to install the conditioner alone; always contact specialized technical personnel. Cleaning and maintenance must be carried out by specialized technical personnel. In any case disconnect the appliance from the mains electricity supply before carrying out any cleaning or maintenance.
Air Conditioner Service Manual 7.3 SAFETY RULES AND PROHIBITIONS Do not bend, tug or compress the power cord since this could damage it. Electrical shocks or fire are probably due to a damaged power cord. Specialized technical personnel only must replace a damaged power cord. Do not use extensions or gang modules. Do not touch the appliance when barefoot or parts of the body are wet or damp. Do not obstruct the air inlet or outlet of the indoor or the outdoor unit.
Air Conditioner Service Manual 8.Names of parts INDOOR UNIT 1 2-3 4 Indoor unit No. 6 5 Name 1 Front panel 2 Air filter 3 Special filter(option) 4 Display PCB 5 Vertical vane 6 Horizontal vane 7 Remote controller 7 8 Outdoor unit No.
Air Conditioner Service Manual 9. Installation manual 9.1 Installation Details Connecting pipe length Pipe size(Inch) Model Liquid Gas WYT009GLFI19RL 1/4 3/8 WYT009ALFI19RL 1/4 3/8 WYT012GLFI19RL 1/4 3/8 WYT012ALFI19RL 1/4 3/8 WYT018GLFI19RL 1/4 3/8 WYT024GLFI19RL 1/4 1/2 WYT036GLFI19RL 1/4 5/8 Outdoor unit Indoor unit Pipe length is 15 m(59Inch) Max. Indoor unit Standard length: m (Inch) Model Height should be less than 5m (19.7Inch) Height should be less than 5m (19.
Air Conditioner Service Manual 9.2 Installation for the first time Indoor unit 150mm(5.9") Install the indoor unit level on a strong wall that is not subject to vibrations Mounting plate The inlet and outlet ports should not be 150mm(5.9") obstructed: the air should be able to blow all over 150mm(5.9") the room. Do not install the unit near a source of heat, steam, or flammable gas. Install the unit near an electric socket or private Condensed water drain pipe circuit.
Air Conditioner Service Manual Install the indoor unit at a height of at least 2.5m(0.1") appliance has been installed so that it can be from the ground. pulled out if necessary. To install, proceed as follows: 9.2.1 Installation of the mounting plate. 9.2.2.1 By using a level, put the mounting plate in a perfect square position vertically and horizontally. 9.2.1.2 Drill 32mm(1.26") deep holes in the wall to fix the plate. 9.2.1.3 Insert the plastic anchors into the hole. 9.2.1.
Air Conditioner Service Manual 7).An efficient earth connection must be ensured. 8).If the power cable is damaged, it must be replaced by an authorized Service Centre. 1 9.2.4 Refrigerant piping connection The piping can be run in the 3 directions indicated 2 by numbers in the picture. When the piping is run 3 in direction 1 or 3, cut a notch along the groove on the side of the indoor unit with a cutter.
Air Conditioner Service Manual 4).If the piping is installed to the right, the pipes, power cable and drain hose must be lagged and secured onto the rear of the unit with a pipe connection. Insert the pipe connection into the relative slot. Press to join the pipe connection to the base. 9.2.8 Electronic connections Wiring diagram on the back of the cover 1. Take the cover away. 2. Connect the cable wires to the terminal board using the same numbering as in the indoor unit. 3.
Air Conditioner Service Manual 10. Trouble shooting 10.
Air Conditioner Service Manual WYT018GLFI19RL, WYT024GLFI19RL, WYT036GLFI19RL 10.3 Connection of ODU PCB PC monitor DRM-COM DRM1 DRM2 DRM3 COMP. top Temp protection SuctionTemp sensor Out door coil eTmp sensor Outdoor ambient Temp senso r （ White） （ Blue） （ Red） Exhaust Temp. sensor Expansion valve COMP.
Air Conditioner Service Manual DRM-COM DRM1 DRM2 DRM3 COMP. top Temp protection Suction Temp sensor Out door coil Temp sensor Outdoor ambient Temp senso r （White） （Red） （Blue） CN7 （ LEV） Exhaust Temp. sensor Expansion valve COMP.
Air Conditioner Service Manual 10.5 Examples of repairing 10.5.1 Display E1 or E2 Reasons : 1) The sensor connection terminal loose or not plugged in. Solution: Check the connecter of sensor and slot (CN6), if loose or not plugged in, please connect again. 2) Room temperature sensor (IRT) and Indoor pipe (coil) temperature sensor (IPT) damage (short or broken). Solution: check the resistance of the sensor R (25℃) =5 kΩ, if short or broken please replace it. Fail OK 3) The PCB fail.
Air Conditioner Service Manual 3) The indoor main PCB damage. Solution: Replace the indoor main PCB. 10.5.3 Display E3, E7 Reasons: 1) Outdoor pipe temp sensor, outdoor temp sensor connection terminal loose or not plugged in. Solution: Check the connecter of sensor and slot, if loose or not plugged in, please connect again. 2) Outdoor pipe temp sensor and outdoor temp sensor damage (short or broken). Solution: Check and replace the sensor. Fail OK 3) Outdoor PCB damage.
Air Conditioner Service Manual 2) Outdoor pipe temp sensor damage. Fail OK Solution: Check and replace the sensor. 3) Outdoor PCB damage. Solution: Check and replace the outdoor PCB. 10.5.5 Display E0,E5 Reason: Indoor / outdoor communication damage. Solution: 1) Check if the indoor and outdoor connections are correct. The terminal L and N which connect to indoor unit shall correspond to each other on indoor and outdoor units.
Air Conditioner Service Manual 1 N L 5) Communication fault if resistance or optical coupler broken, replace outdoor PCB. Communication circuit 6) Is there any burnt on PCB? If no, test the rectifier, FRD, IGBT etc. any component broken, replace PCB. Any of 2 pins should be no short circuit Any of 2 pins should be no short circuit Any of 2 pins should be no short circuit 7) Test the DC voltage between DC+ and DC-. If the voltage is less than 50V approximately, please replace outdoor PCB. DCDC+ 10.5.
Air Conditioner Service Manual 10.5.7 Display E9 （first display P0 or P9） Reason: Outdoor PCB drive circuit damage. Solution: Re-energize and check the protection code on display. Firstly display P0. 1) If this code is displayed when the compressor is started for several seconds or even not started, check the compressor connection for correctness, if no insert wrong, replace outdoor PCB.
Air Conditioner Service Manual 10.5.9 Display EE Reason: EEPROM fault. Solution: Shut down power supply and reenergize it, if the fault remains there, check the EEPROM installation, if no problem, please replace outdoor PCB. EEPROM 10.5.10 Display CL Cause: Air filter duty, the unit operation Cumulative time 500 hours, the controller will confirmation the filter dirty and display CL. Solution: Clean the air filter then cut off the power and suppl y again. 10.6 MALFUNCTION (PARTS) CHECK METHOD 10.6.
Air Conditioner Service Manual 10.6.2 DC Over Current Error Error memory is recorded Start Are valves (2-way or 3-war) close? Yes Full open stop valves Does compressor rotates? Yes No Does compressor rotates more than 30 seconds? No Yes Yes Is IPM PWB floating from the heat sink? Fix IPM PWB with screws No Check IPM lead wire (UVW) Modify the connection of compressor lead wire on PWB Normal securely. Abnormal Check the AC power supply voltage when compressor rotate.
Air Conditioner Service Manual 10.6.
Air Conditioner Service Manual 10.7 THERMISTOR TEMPERATURE CHARACTERISTICS 1. Indoor unit and outdoor exchange temperature and outside air temperature sensor temperature characteristics TEMP. ℃(℉) Resistance (k Ohm) Voltage of resistance TEMP. ℃(℉) Resistance (k Ohm) Voltage of resistance TEMP. ℃(℉) Resistance (k Ohm) Voltage of resistance -30(-86) 63.513 4.628 15(59) 7.447 2.968 60(140） 1.464 1.115 -29(-84.2) 60.135 4.609 16(60.8) 7.148 2.918 61(141.8) 1.418 1.088 -28(-82.
Air Conditioner Service Manual TH1: indoor room temperature sensor and outside air temperature sensor TH2: indoor exchange temperature sensor and outside exchange temperature sensor Before measuring resistance, disconnect connectorsas shown above. 2. Outdoor unit sensor temperature characteristics TEMP. R min R(t) R max TEMP. R min R(t) R max R min R(t) R max (k Ohm) (k Ohm) ℃(℉) -30(-86) 283.3 322.9 367.7 24(75.2) 19.36 20.89 22.52 78(172.4) 2.563 2.654 2.745 -29(-84.2) 267.
Air Conditioner Service Manual -2(-35.6) 63.74 70.48 77.87 52(125.6) 6.309 6.655 7.013 106(222.8) 1.073 1.12 1.168 -1(-33.8) 60.69 67.05 74 53(127.4) 6.08 6.409 6.748 107(224.6) 1.042 1.089 1.136 0(32) 57.81 63.8 70.34 54(129.2) 5.861 6.173 6.495 108(226.4) 1.013 1.058 1.104 1(33.8) 55.08 60.72 66.88 55(131) 5.651 5.947 6.253 109228.2) 0.9833 1.028 1.074 2(35.6) 52.49 57.81 63.61 56(132.8) 5.449 5.73 6.02 110(230) 0.9553 0.9997 1.045 3(37.4) 50.
