York VRF Error Codes



Malfunction and Protection Code Table. The display board in digital scroll system is just to display running conditions and  malfunction information. The manual button is just to check the address code and power code  of indoor units.

York VRF Error Codes
York VRF Error Codes

Malfunction and Protection Code Table:

Error CodesContents
E0Phase sequence or lack of phase
E1Communication malfunction
E2T1 sensor malfunction
E3T2A sensor malfunction
E4T2B sensor malfunction
E5T3 sensor malfunction
E6Over-zero checking malfunction
E7EEPROM malfunction
E8Fan motor checking out of control
E9Communication malfunction between PCB and Display board
EFOther malfunction
EEWater level checking malfunction
EDOutdoor protection
ECClear malfunction
EBInverter Module Protection
EACompressor Over-current (4 times)
P0Evaporator Temp. Protection
P1Anti-cooling or Defrost Protection
P2Condenser High Temp. Protection
P3Compressor Temp. Protection
P4Discharge Pipe Temp. Protection
P5Discharge High-pressure Protection
P6Discharge Low-pressure Protection
P7Power Lack/Over Volt Protection
P8Compressor Over-current
PFOther Protection
PEOil Balance
PDOil Return
H1Net communication malfunction
H2Outdoor decreasing malfunction (valid for host unit)
H3Outdoor adding malfunction (valid for host unit)



YORK VRF Wired remote controller
YORK VRF Wired Remote Controller

Troubleshooting

YORK VRF Troubleshooting
YORK VRF Troubleshooting

The air-conditioner does not run after pressing ON/OFF button.

Communication malfunction between outdoor units (Only valid for 20,30HP)




Display: The outdoor unit digital diode is displaying “E0

Solutions:

  1. Check if communication cable is broken off
  2. Exchange P, Q line if there is no broken circuit

Phase sequence error

Display: The outdoor unit digital diode is displaying “E1

Solutions:

  1. Check if the voltage between the power line terminals A, B, C of outdoor units and N is normally 220v. If not please check whether the power lines are well connected.
  2. After checking the voltage without finding any error, please transpose any two of the outdoor units power lines (A, B.C.)
YORK VRF Wired Remote Controller Meaning
YORK VRF Wired Remote Controller Meaning

Communication trouble between indoor unit and outdoor unit

Display: Outdoor unit digital diode is displaying “E2” and the timer lamp on the display board of the indoor unit, which has the communication trouble blinks.

Solutions:

  1. Check if communication cable is broken off
  2. Exchange P, Q line if there is no broken circuit

Outdoor unit temperature sensor abnormal

Display: Outdoor unit digital diode is displaying E3, E4, E5, and E7 (Only valid for 20,30HP)

Solutions:




  1. Measure T3, T4, T5, T6 electric resistance respectively and replace the broken one if the electric resistance is not correct.
  2. If the electric resistance is normal, please test the outdoor PCB and change a new one if it does not work well.

Indoor unit temperature sensor abnormal

Display: The operation lamp of the indoor unit blinks

Solutions:

  1. Measure T1, T2, and T3 electric resistance respectively to see if there is an open or short circuit
  2. If the electric resistance is normal, please test the indoor PCB and change a new one if it does not work well.

Water-level switch abnormal

Display: Outdoor unit digital diode display “E6” and Indoor unit alarm lamp blinks

Method: Check if the water level switch is closed and replace a new switch if the old one is bad.

The address of outdoor unit malfunction (Only valid for 20,30HP)

Display: Outdoor unit digital diode display “E8

Method: Check the address code of outdoor unit PCB and make sure the address code in the right position

After running a while the system stops to perform protection.

Water level alarming trouble

Display: Indoor unit alarm lamp blinks

Solutions:

  1. Check if water pump runs well
  2. Check if the drainpipe is broken
  3. Check if the water level switch is blocked
  4. If the above situations do not occur please change a new indoor PCB

High-pressure protection

Display: The outdoor unit digital diode is displaying:”P1



Solutions:

  1. Check if the high-pressure protection switch is broken or loosen
  2. Test if the discharge temperature of the compressor is too high. If the discharge temperature is too high and the current is lower than the rated current, the system is probably lack of refrigerant and replenishes it.
  3. Test if the pressure (high pressure) is too high or the current is overloaded. If so the possible causes are: the overcharge of refrigerant, the system air leakage, or bad ventilation conditions.

Low-pressure protection

Display: The outdoor unit digital diode is displaying:”P2

Solutions:

  1. Check if the low pressure protection switch is broken or loosen
  2. Test if the pressure (low pressure) is too low. The probable reasons are: the overcharge of refrigerant or system blockade.

Over current protection

Display: The outdoor unit diode. Is displaying:”P3

Solutions:

  1. Check if the current is overloaded.
  2. The possible reasons for the over current are: the overcharge of refrigerant, air leakage, and bad ventilation and heat-emission conditions.

Compressor discharge temperature protection, Condenser high temperature protection

Display: P4/ P5 is displayed on the outdoor unit diode

Solutions:

  1. Test digital discharge temperature, outdoor condenser T3 temperature
  2. Test system pressure
  3. High digital discharge temperature is likely owing to the lack of refrigerant, air leakage or system blockade. Check the above items respectively to solve the problem.
  4. Condenser high temperature protection owes to the overcharge of refrigerant, air leakage or bad ventilation and heat-emission conditions.

York Vrf  Manual  PDF

York Air Conditioner Error Codes




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