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EQK 18S-EHVC WD2H Series, Troubleshooting Manual

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EQK 18S-EHVC WD2H Series Troubleshooting Manual Download Page 14

13

TROUBLESHOOTING

P9

( DC fan motor error )

Diagnosis

Handling

P5/H1

( T3 condenser sensor high temp protection )

Diagnosis

Handling

Check if the DC fan
motor wiring is correct

It should be connect correctly

according to the wiring diagram

No

Power off and re-power on
to see whether it is normal

Replace the mainboard

Check if the DC fan
motor is damaged

If it is damaged, replace with a new one

Yes

Yes

No

The DC fan motor
wire interface

Power off and re-power on to
see whether it is normal

Summary of Contents for 18S-EHVC WD2H Series

Page 1: ... purchasing our air conditioner Please read this owen s manual carefully before using your air conditioner Model No 18S EHVC WD2V 18S EHVC WD2H 18S EHVH WD2V 18S EHVH WD2H Troubleshooting Manual 18SEER Condensing Air Handler ...

Page 2: ...ncy operation with portable convenience By following the operating and care instructions in this manual your air conditioner will provide you with many years of reliable service Please visit our website www eqkhvac com For any questions or Technical Support please contact us by mail info geektechnology com or by phone 1 888 493 0305 ...

Page 3: ...y valve control port 4 Outdoor display board wiring terminal 15 Crankcase Heating zone control terminal 5 Reserved 16 Chassis Electric Heater control terminal 6 24V wire controller interface 17 Solenoid valve2 control terminal 7 EXV drive port 18 Power supply connecting terminal 8 Exhaust temperature sensor port T5 19 Power supply connecting terminal 9 Outdoor ambient temperature sensor port T4 20...

Page 4: ...inal 4 Outdoor display board wiring terminal 15 Chassis Electric Heater control terminal 5 24V wire controller interface 16 Solenoid valve control terminal 6 EXV drive port 17 Power supply connecting terminal 7 Exhaust temperature sensor port T5 18 Power supply connecting terminal 8 Outdoor ambient temperature sensor port T4 19 Relay 9 Condenser temperature sensor port T3 20 Relay 10 Pressure sens...

Page 5: ...ut port of transformer 11V 2 Reserved 9 Dip switch to adjust fan speed 3 Chassis Electric Heater control terminal 10 Power supply connecting terminal L1 4 Reserved 11 Fan power cord input port L1 5 24V wire controller interface 12 Input power cord transformer port 6 Output port of transformer 24V 13 Power supply connecting terminal L2 7 Fuse 14 Fan power cord input port L2 2 Air handing unit ...

Page 6: ... pressure abnormal in heating mode 20 times P13 error within 180 mins H3 IPM modular high temp error 20 times P8 within 120 mins H4 Low pressure error 20 times P2 within 100 mins H5 Discharge temperature abnormal error 20 times P4 within 100 mins H6 Wet operation error 20 times P12 within 200 mins H7 T3 condenser sensor disconnect error 20 times E14 within 100 mins H8 Discharge temp sensor disconn...

Page 7: ... L4 Zero speed protection L5 Compressor phase loss protection ratio protection L7 Compressor stalls L8 Frequency limitation or decline by high pressure L9 Frequency limitation by voltage LA Frequency limitation by condenser temp LC Frequency limitation by discharge temp LD Frequency limitation by IPM modular high temp LE Frequency limitation by current LF Oil return d0 Defrost dF Force cooling dH ...

Page 8: ...s Handling Check the connection between the sensor and PCB The sensor should be connected firmly and correctly Error Check if the sensor is damaged OK Replace with a new sensor and insert it in the corresponding position Yes Replace the main board No Power off and re power on to see whether it is normal If there is still abnormal replace the mainboard ...

Page 9: ... requirements in the manual Yes Replace the power cord to the right diameter Check if the compressor wiring is correct Yes The power supply wire interface It should be connect correctly according to the wiring diagram Yes If there is still abnormal replace the mainboard No Power off and re power on to see whether it is normal The compressor wire interface No No No Power off and re power on to see ...

Page 10: ... Measure the value of outdoor unit pressure sensor Compare it with the pressure value of the pressure gauge OK If the difference is large replace with a new sensor and weld in the correct position If the difference is small replace the mainboard The pressure sensor should be soldered in the correct position Check the connection between the sensor and PCB The sensor should be connected firmly and c...

Page 11: ...mly and correctly Error Try to short circuit the pressure switch OK If there is still abnormal replace the mainboard If the error disappears check if the switch is damaged If it is damaged replace with a new one and solder it in the correct position The high pressure switch should be soldered in the correct position Power off and re power on to see whether it is normal If there is still abnormal r...

Page 12: ...e s too much refrigerant in the system Discharge some refrigerant from the system No Discharge the refrigerant vacuum recharge refrigerant Check if there is too much Air or N2 in the system No No Yes Yes Yes Yes Check if the gas pipe in the system is blocked No Remove dirty and keep it unobstructed Check if the refrigerant of the system is insufficient Charge some refrigerant into the system Yes R...

Page 13: ... No Power off and re power on to see whether it is normal Yes Yes If there is still abnormal replace the mainboard Power off and re power on to see whether it is normal If there is still abnormal replace the mainboard Re power on to measure the temperature of the IPM board Observe the temperature change If the temperature changes normally but the final temperature is too high remove the IPM heat s...

Page 14: ...fan motor wiring is correct It should be connect correctly according to the wiring diagram No Power off and re power on to see whether it is normal Replace the mainboard Check if the DC fan motor is damaged If it is damaged replace with a new one Yes Yes No The DC fan motor wire interface Power off and re power on to see whether it is normal ...

Page 15: ...e is still abnormal replace the mainboard No Yes Yes Check if the refrigerant is lack or the refrigerant is No Charge some refrigerant into the system Yes Check if there is too much Air or N2 in the system Discharge the refrigerant vacuum recharge refrigerant Power off and re power on to see whether it is normal Check if the throttle part of the system is blocked Remove dirty and keep it unobstruc...

Page 16: ...y limitation protection not error Check if the voltage is normal Replace the mainboard Yes The power supply is too low or too high No Connect a transformer before connecting the unit to the power supply then adjust the voltage to the normal operation range Power off and re power on to see whether it is normal If there is still abnormal replace the mainboard ...

Page 17: ...Emerson Quiet Kool Co Ltd 120 US 46 Parsippany Troy Hills NJ 07054 Toll Free 1 888 493 0305 Version Update 2021 5 0 ...

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