Related Manuals for EQK 18S-EHVC WD2V Series
Summary of Contents for EQK 18S-EHVC WD2V Series
- Page 1 18SEER Condensing & Air Handler Troubleshooting Manual Model No.: 18S-EHVC*WD2V / 18S-EHVC* WD2H 18S-EHVH*WD2V / 18S-EHVH*WD2H Thank you very much for purchasing our air conditioner. Please read this owen's manual carefully before using your air conditioner.
- Page 2 Troubleshooting THANK YOU Congratulations on your purchase and welcome to the Family. Your new Air Conditioner combines high-efficiency 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 TROUBLESHOOTING Parameter point check table 1. Top discharge outdoor unit For 18S-EHV*24WD2V, 18S-EHV*36WD2V Function description for the corresponding position: Content Content Compressor wiring terminal High/Low pressure switch ports DC fan motor wiring terminal AC fan motor wiring terminal Transformer Four-way valve control port Outdoor display board wiring terminal Crankcase Heating zone control terminal Reserved...
- Page 4 TROUBLESHOOTING For 18S-EHV*48WD2V, 18S-EHV*60WD2V Function description for the corresponding position: Content Content Compressor wiring terminal AC fan motor wiring terminal DC fan motor wiring terminal Four-way valve control port Transformer Crankcase Heating zone control terminal Outdoor display board wiring terminal Chassis Electric Heater control terminal 24V wire controller interface Solenoid valve control terminal...
- Page 5 TROUBLESHOOTING 2. Air handing unit For 18S-EHV*24WD2H, 18S-EHV*36WD2H 18S-EHV*48WD2H 18S-EHV*60WD2H Function description for the corresponding position: Content Content DC fan motor wiring terminal Output port of transformer(11V) Reserved Dip switch to adjust fan speed Chassis Electric Heater control terminal Power supply connecting terminal(L1) Reserved Fan power cord input port(L1) 24V wire controller interface...
- Page 6 TROUBLESHOOTING Error code (1) The error codes for outdoor unit as follows: Definitions of malfunction Error code T4 Outdoor ambient temperature sensor error T5 Discharge temperature sensor error T3 Condenser temperature sensor error AC under voltage protection EEPROM error IPM modular sensor error HLP Pressure sensor error T3 or T5 sensor disconnect error High pressure switch error...
- Page 7 TROUBLESHOOTING High compression ratio protection Low compression ratio protection DC cable bus low voltage protection DC cable bus high voltage protection MCE fault / sync / closed loop Zero speed protection Compressor phase loss protection ratio protection Compressor stalls Frequency limitation or decline by high pressure Frequency limitation by voltage Frequency limitation by condenser temp.
- Page 8 TROUBLESHOOTING (2) Troubleshooting by error code E4/E5/E6 (T4/T5/T3 temperature sensors error) Diagnosis Handling Check the connection The sensor should be Error between the sensor and PCB connected firmly and correctly Replace with a new sensor, and insert Check if the sensor is damaged it in the corresponding position Replace the main board T5/TP...
- Page 9 TROUBLESHOOTING ( AC under voltage protection ) Diagnosis Handling Check if the power supply The power supply wire should wire is reliably connected be connected firmly and correctly Replace the power cord Check if the wire diameter meets to the right diameter the requirements in the manual Check if the compressor It should be connect correctly...
- Page 10 TROUBLESHOOTING (HLP Pressure sensor error） Diagnosis Handling The sensor should be Check the connection Error connected firmly and correctly between the sensor and PCB Measure the value of outdoor If the difference is large, unit pressure sensor replace with a new sensor, Compare it with the pressure weld in the correct position value of the pressure gauge...
- Page 11 TROUBLESHOOTING ( High pressure switch error ) Diagnosis Handling Check the connection The switch should be Error between the switch and PCB connected firmly and correctly If there is still abnormal, Try to short circuit replace the mainboard the pressure switch If it is damaged, replace with a new one, If the error disappears, check and solder it in the correct position...
- Page 12 TROUBLESHOOTING P1/H2 ( High pressure switch protection ) Diagnosis Handling Use the pressure gauge to The pressure switch has damaged, detect the system pressure to and replace it with a new one see if the change is normal Check if the liquid pipe in Remove dirty and keep it unobstructed the system is blocked Check if there’s too much...
- Page 13 TROUBLESHOOTING P5/H1( T3 condenser sensor high temp protection ) Diagnosis Handling Check if the liquid side of Remove dirty and keep it unobstructed outdoor system is blocked Discharge the refrigerant, Check if there is too much vacuum, recharge refrigerant Air or N2 in the system Power off and re-power on If there is still abnormal to see whether it is normal...
- Page 14 TROUBLESHOOTING ( DC fan motor error ) Diagnosis Handling It should be connect correctly Check if the DC fan according to the wiring diagram motor wiring is correct Power off and re-power on Replace the mainboard to see whether it is normal Check if the DC fan If it is damaged, replace with a new one motor is damaged...
- Page 15 TROUBLESHOOTING High pressure abnormal error(In heating mode) P13/H3( Diagnosis Handling Check if the liquid side of Remove dirty and keep it unobstructed outdoor system is blocked Discharge the refrigerant, Check if there is too much vacuum, recharge refrigerant Air or N2 in the system If there is still abnormal Power off and re-power on to see whether it is normal...
- Page 16 TROUBLESHOOTING L1/L2( DC cable bus low/high voltage protection ) Diagnosis Handling Replace the mainboard Check if the voltage is normal Connect a transformer before connecting The power supply is the unit to the power supply, then adjust the too low or too high voltage to the normal operation range L4-L8 (IPM module subdivision protection）...
- 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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