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9. Troubleshooting

9.1 Indoor Unit Error Display

Display LED

STATUS

EEPROM parameter error

Indoor / outdoor units communication protection

Zero-crossing signal error

Indoor fan speed out of control

Open or short circuit of outdoor temperature sensor or outdoor unit

EEPROM parameter error

Open or short circuit of room or evaporator temperature sensor

Outdoor fan speed out of control

IBM malfunction or IGBT over-strong current protection

Over voltage or too low voltage protection

Temperature protection of compressor top.

Inverter compressor drive error

Note:

E4 & P3: Reserved function.

Outdoor unit error display:

On the outdoor PCB, there are two LED lights. One is green, the other is red. You can judge what the

error is through the status of the two lights.

Error

LED6

（

Green

）

LED5

（

Red

）

Indoor unit display

Over voltage or too low voltage protection

Stand by

Over voltage or too low voltage protection

Normal operation

Inverter compressor drive error

IBM malfunction or IGBT over-strong
current protection

X P0

Inverter compressor drive error

（

light

）

（

off

）

☆（

flash

）

Содержание WYB-GMFI SERIES

Страница 1: ...WYB GF19 A1 1112 SERVICE MANUAL DC INVERTER SPLIT WALL MOUNTED DUCTLESS HEAT PUMPS WYB GMFI SERIES 16 AND 19 SEER VERSIONS ...

Страница 2: ... 6 3 Pipe length and the elevation 19 6 4 Installation for the first time 20 6 5 Adding the refrigerant after running the system for many years 23 6 6 Re installation while the indoor unit need to be repaired 23 6 7 Re installation while the outdoor unit need to be repaired 26 7 Operation characteristics 28 8 Electronic function 29 8 1 Abbreviation 29 8 2 Display function 29 8 3 Main Protection 30...

Страница 3: ...ble or repair the product there is risk of fire or electric shock Always ground the product There is risk of fire or electric shock Install the panel and the cover of control box securely There is risk of fire of electric shock Always install a dedicated circuit and breaker Improper wiring or installation may cause fore or electric shock Use the correctly rated breaker of fuse There is risk of fir...

Страница 4: ...during operation There is risk of fire or electric shock Do not place anything on the power cable There is risk of fire or electric shock Do not plug or unplug the power supply plug during operation There is risk of fire or electric shock Do not touch operation the product with wet hands There is risk of fire or electric shock Do not place a heater or other appliance near the power cable There is ...

Страница 5: ... electric shock Be caution that water could not enter the product There is risk of fire electric shock or product damage Ventilate the product from time to time when operating it together with a stove etc There is risk of fire or electric shock Turn the main power off when cleaning or maintaining the product There is risk of electric shock When the product is not be used for a long time disconnect...

Страница 6: ...m to your health Do not use the product for special purposes such as preserving foods works of art etc It is a consumer air conditioner not a precision refrigerant system There is risk of damage or loss of property Do not block the inlet or outlet of air flow It may cause product failure Use a soft cloth to clean Do not use harsh detergents solvents etc There is risk of fire electric shock or dama...

Страница 7: ...t Be careful and avoid personal injury Replace the all batteries in the remote control with new ones of the same type Do not mix old and mew batteries or different types of batteries There is risk of fire or explosion Do not recharge or disassemble the batteries Do not dispose of batteries in a fire They may burn of explode If the liquid from the batteries gets onto your skin or clothes wash it we...

Страница 8: ...mes of Indoor Outdoor Units DC Inverter Capacity Model Indoor units Outdoor units 9K WYB009AMFI WB009AMFI WN009AMFI 12K WYB0129AMFI WB0129AMFI WN0129AMFI 18K WYB018GMFI WB018GMFI WN018GMFI 24K WYB024GMFI WB024GMFI WN024GMFI ...

Страница 9: ...he evaporator pipe temperature Indoor unit Operation by remote controller Anti freezing control in cooling Time Delay Safety control Indoor fan speed control Two direction air vane Sleep mode auto control Independent dehumidification Air flow Direction Auto mode Temp Compensation Flexible wiring connection Auto defrost Anti cold function Self diag function Auto restart Ionizer Optional Prevent the...

Страница 10: ...rove the heating efficiency at operation mode Hydrophilic aluminum fin It is only operated in the heating operation mode except defrosting operation Valve protection 4 way valve control Made from electrolytic zinc steel sheet and anti rust coated components Low noise air flow system Bird tail propeller fan makes the outdoor unit run more quietly PTC heater Optional Anti rust cabinet ...

Страница 11: ...9 3 Dimension 3 1 Indoor Units Model W mm H mm D mm 009 790 31 10in 265 10 43in 198 7 80in 012 920 36 22in 292 11 50in 223 8 78in 018 024 998 39 29in 322 12 68in 240 9 45in ...

Страница 12: ...L H Model 009 Model 012 L L L mm R m 100 15 L mm R m 150 18 mm H mm 51 45 mm H mm 87 45 Dimension Dimension R n of installati Φ65 n of installati Φ65 on hole mm on hole mm ...

Страница 13: ...Model 018 Model 024 L L mm R m 100 11 L mm 120 5 mm H mm 9 45 H mm 55 Dimension Dimension o n of installati Φ65 of installation Φ95 on hole mm n hole mm ...

Страница 14: ...0cm More than 30cm More than 60cm Service space Fence or obstacles Model W mm D mm H mm W1 mm A mm B mm 009 760 29 92in 285 11 22in 590 23 23in 823 32 40in 530 20 87in 290 11 42in 012 018 845 33 27in 320 12 60in 700 27 56in 908 35 75in 560 22 05in 335 13 19in 024 ...

Страница 15: ...13 4 Refrigerant Cycle Diagram For cooling only models INDOOR OUTDOOR LIQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR CAPILIARY TUBE ...

Страница 16: ...NDOOR OUTDOOR LIQUID SIDE GAS SIDE HEAT EXCHANGE EVAPORATOR HEAT EXCHANGE CONDENSER COMPRESSOR 2 WAY VALVE 3 WAY VALVE CHECK VALVE Heating Model only CAPILIARY TUBE REVERSING VALVE Heating Model only COOLING HEATING ACCUMULATOR ...

Страница 17: ...15 5 Wiring Diagram 5 1 Indoor Units 009 012 018 024 ...

Страница 18: ...16 5 2 Outdoor Units 009 012 018 ...

Страница 19: ...17 024 ...

Страница 20: ...9 3 4 6500 663kgf cm 6700 683kgf cm 6 2 Connecting the cables The power cord of connect should be selected according to the following specifications sheet Rated current of appliance Nominal cross sectional area mm 3 and 6 0 75 6 and 10 1 10 and 16 1 5 16 and 25 2 5 The cable size and the current of the fuse or switch are determined by the maximum current indicated on the nameplate which located on...

Страница 21: ...s than 5m Use vacuum pump 9K 12K More than 5m Use vacuum pump Pipe length 5 20g m 18K 24K More than 5m Use vacuum pump Pipe length 5 40g m Model Standard length m Max Elevation B m Max Length A m 9K 12K 5 8 20 18K 24K 5 10 25 Caution Capacity test is based on standard length and maximum allowance length is based on system reliability Oil trap should be installed per 5 7 meters ...

Страница 22: ...letely tighten the flare nuts of the indoor and outdoor units confirm that both the 2 way and 3 way valves are set to the closed position 2 Connect the charge hose with the push pin of handle lo to the 3 way valves gas service port 3 Connect the charge hose of handle hi connection to the vacuum pump 4 Fully open the handle Lo of the manifold valve 5 Operate the vacuum pump to evacuate 6 Make evacu...

Страница 23: ...t to the closed position 2 Connect the charge set and a charging cylinder to the service port of the 3 way valve 3 Air purging Open the valves on the charging cylinder and the charge set Purge the air by loosening the flare nut on the 2 way valve approximately 45 for 3 seconds then closing it for 1 minute repeat 3 times After purging the air use a torque wrench to tighten the flare nut on the 2 wa...

Страница 24: ...2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air be careful of the liquid refrigerant 3 Put the charging cylinder onto the electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Open the valves Low side on the charge set and charge the system with liquid refrigerant 6 W...

Страница 25: ...linder onto the electronic scale and record the weight 4 Operate the air conditioner at the cooling mode 5 Open the valves Low side on the charge set and charge the system with liquid refrigerant 6 When the electronic scale displays the proper weight refer to the gauge and the pressure of the low side disconnect the charge hose from the 3 way valve s service port immediately and turn off the air c...

Страница 26: ...the manifold valve slightly to purge air from the charge hose for 5 seconds and then close it quickly 4 Set the 2 way valve to the close position 5 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 0 1MPa 6 Set the 3 way valve to the closed position immediately Do this quickly so that the gauge ends up indicating 0 3 to 0 5Mpa Disconnect the charge set and tight...

Страница 27: ...orque wrench to tighten the flare nut on the 2 way valve 4 Check the gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the charging cylinder and discharge the refrigerant by loosening the flare nut on the 2 way valve approximately 45 until the gauge indicates 0 3 to 0 5 Mpa 6 Disconnect the charge set and the charging cylinder and set the 2 way ...

Страница 28: ... position 2 Connect the vacuum pump to 3 way valve s service port 3 Evacuation for approximately one hour Confirm that the compound meter indicates 0 1Mpa 4 Close the valve Low side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 5 Disconnect the charge hose from the vacuum pump ...

Страница 29: ... on the charge set and charge the system with liquid refrigerant If the system cannot be charge with the specified amount of refrigerant or can be charged with a little at a time approximately 150g each time operating the air conditioner in the cooling cycle however one time is not sufficient wait approximately 1 minute and then repeat the procedure 5 When the electronic scale displays the proper ...

Страница 30: ...e the unit to function abnormally 2 Room relative humidity less than 80 If the air conditioner operates in excess of this figure the surface of the air conditioner may attract condensation Please sets the vertical air flow louver to its maximum angle vertically to the floor and set HIGH fan mode 3 Optimum performance will be achieved within this operating temperature ...

Страница 31: ...n 8 2 1 Icon explanation on indoor display board OPERATION indication lamp This lamp illuminates when the air conditioner is in operation AUTO indication lamp Lights up during the Auto operation Ion indication lamp optional function Lights up when Clean Air feature is activated and Ionizer can generate abundant anions to fill the room with refreshing and natural air TIMER indication lamp Lights up...

Страница 32: ...will stop working when the compressor top temp protector cut off and will restart after the compressor top temp protector restart 8 3 3 Temperature protection of compressor discharge When the compressor discharge temp is getting higher the running frequency will be limited as below rules Compressor discharge temp T5 115 for 5s compressor stops 108 T5 115 decrease the frequency to the lower level e...

Страница 33: ...e wiring terminal of the compressor then the compressor is heated without operation Preheating release condition If T4 5 or the compressor starts running the preheating function will stop 8 3 8 Zero crossing detection error protection If AC detects time interval is not correct for continuous 240s the unit will stop and the LED will display the failure The correct zero crossing signal time interval...

Страница 34: ...he compressor will run at the Fmax frequency for 7 minutes according to the outdoor ambient temp During the 7 minutes the frequency limitation is active 7 minutes later the compressor running frequency will be controlled as below 3 5 3 0 2 5 2 0 1 5 1 0 0 5 0 5 1 0 A B C D E F G H While Temp zone A B C D E F G Frequency F8 F8 F7 F6 F5 F3 F1 Note When T1 Ts keeps in the same temp zone for 3 minutes...

Страница 35: ...1COOL Off Compressor stops Decrease Decrease the running frequency to the lower level Hold Keep the current frequency Resume No limitation for frequency Note When AC is in hold zone for 3 minutes the compressor frequency will rise to the higher level frequency will increase twice at most 8 4 2 2 Outdoor fan running rules 22 20 High Low 8 4 2 3 Indoor fan running rules In cooling mode indoor fan ru...

Страница 36: ...requency T3 52 the compressor will not limit the frequency and resume to the former frequency T3 60 for 5 seconds the compressor will stop until T3 52 8 4 2 5 Evaporator low temperature T2 protection T2 0 the compressor will stop and restart when T2 5 0 T2 4 the compressor frequency will be limited and decreased to the lower level 4 T2 7 the compressor will keep the current frequency T2 7 the comp...

Страница 37: ... Fmax F9 Fmax F10 Fmax F8 Fmax F6 Fmax F2 34 Off 33 28 27 25 24 22 21 19 18 16 17 15 14 Fmax F4 12 11 6 5 If users switch on AC by remote controller the compressor will run at the Fmax frequency for 7 minutes according to outdoor ambient temp During the 7 minutes the frequency limitation is active 7 minutes later the compressor running frequency will be controlled as below ...

Страница 38: ...s keeps in the same temp zone for 3 minutes the compressor will run as the below rules A E Increase the frequency to the higher level until to F10 F Keep the current frequency G Decrease the frequency to the lower level until to F1 H Run at F1 for 1h if T1 Ts ΔT 6 the compressor will stop Meanwhile the compressor running frequency is limited by the current ...

Страница 39: ... running frequency to the lower level Hold Keep the current frequency Resume No limitation for frequency Note When AC is in hold zone for 3 minutes the compressor frequency will rise to the higher level The frequency will increase twice at most 8 4 3 2 Outdoor fan running rules 17 15 Low High ...

Страница 40: ...ed and the anti cold wind function is disabled Indoor fan speed can be set as high medium low or auto fan and the anti cold wind function is preferential Auto fan action in heating mode 2 5 2 High Low 1 Medium 1 5 8 4 3 4 Defrosting mode Condition of defrosting T4 0 When the units are running if the following two items are satisfied the units start defrosting The units run with T3 3 for 40 minutes...

Страница 41: ...3 keeps lower than TCDI 4 for more than 3 minutes the machine will enter defrosting mode no matter if T2 drops more than 5 or not Condition of ending defrosting If any one of the following items is satisfied the defrosting will finish and the machine will turn to normal heating mode T3 rises to be higher than TCDE1 T3 keeps to be higher than TCDE2 for 80 seconds The machine has run for 10 minutes ...

Страница 42: ...40 Defrosting action For 18k 24k models Model FD FD1 018 90 100 024 ...

Страница 43: ...H2 for 6 minutes the frequency will not be limited by T2 T2 60 the compressor will stop and restart when T2 48 While TEH2 55 for MS9A 9HRDN1 BQ0W MS9A 24HRDN1 MP0W MS9A 24HRDN1 MS0W TEH2 53 for other models 8 4 4 Auto mode This mode can be chosen with remote controller and the setting temperature can be changed between 17 30 In auto mode the machine will choose cooling heating or fan only mode acc...

Страница 44: ... room temperature is lower than 10 the compressor will stop and not resume until room temperature exceeds 12 8 4 5 4 Evaporator anti freezing protection condenser high temperature protection and outdoor unit frequency limit are active and the same as that in cooling mode 8 4 5 5 The outdoor fan operates the same as in cooling mode 8 4 6 Forced operation function 8 4 6 1 Enter forced operation func...

Страница 45: ...on mode Suppose AC is off now it will not start up firstly after setting the timer off function And when reaching the setting time the timer LED will be off and the AC running mode has not been changed 8 4 7 7 The setting time is relative time 8 4 8 Sleep function mode 8 4 8 1 Operation time in sleep mode is 7 hours After 7 hours the AC quits this mode and turns off 8 4 8 2 Operation process in sl...

Страница 46: ...or will have 3 minutes delay when restarts 8 4 10 Ionizer function optional The indoor unit is equipped with Ionizer which is controlled by the CLEAN AIR button on the remote controller When the unit is turned on press the CLEAN AIR button to activate the function Press it again to stop the function During the time when Ionizer is controlled by remote controller Ionizer will be turned off automati...

Страница 47: ...age or too low voltage protection P2 Temperature protection of compressor top P4 Inverter compressor drive error Note E4 P3 Reserved function Outdoor unit error display On the outdoor PCB there are two LED lights One is green the other is red You can judge what the error is through the status of the two lights Error LED6 Green LED5 Red Indoor unit display Over voltage or too low voltage protection...

Страница 48: ... 1 EEPROM parameter error diagnosis and solution Shut off the power supply and turn on it 5s later The problem comes out again Is the EEPROM chip plugged in indoor PCB well No Correct the connection Replace the main PCB of indoor unit ...

Страница 49: ...r 3 minutes Change the outdoor PCB Yes Power off then power on the A C by the breaker reconnect the power wire Is the E1 extinguished Check the wiring on the outdoor terminal and indoor terminal follow the wiring diagram Is all the connecting correctly 24V Vs 24V Vs is the voltage between S and N No Is the wiring to the outdoor PCB connecting correctly Is the wiring to the indoor PCB connecting co...

Страница 50: ... check if the errors happen again Is the fan motor connector and connection good The unit does not work normally Turn off the unit rotate the cross fan Does it rotate freely No Disassemble the connection between fan and motor check if the bearing is normal If not change the bearing If yes follow the below step Yes No Yes Is the voltage being applied to the fan motor Yes Shut off the power supply a...

Страница 51: ... protector normal No No Is the connection good Is refrigerant circulation volume normal Reconnect it Does the compressor operate Replace it Is the power supply good Replace the outdoor e box Make sure the power supply is normal Yes No Yes Fastening the IPM to the radiator No Check whether the connections between outdoor PCB and IPM are good Check whether the IPM is fixed to radiator tightly Replac...

Страница 52: ...ccurs the main control board must have fault Appendix 10 11 12 13 14 15 16 F 48 50 52 54 56 58 60 17 18 19 20 21 22 23 F 62 64 66 68 70 72 74 24 25 26 27 28 29 30 F 76 78 80 82 84 86 88 31 32 33 34 35 F 90 92 94 96 98 Yes Replace the outdoor PCB Replace inverter compressor Reconnect and retry No No Is the connection of compressor good Is the wiring sequence right The voltage range proper ...

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