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Troubleshooting
Service manual
31
VAM350~200 EKVDX32~100A2VEB
VRV system air conditioner
ESIE22-07 – 2022.02
3.2.13 A8-01 – Fan motor abnormality - power supply abnormality
VAM-J8 units
Trigger
Effect
Reset
Input voltage detected by
PCB too low or too high.
Units will stop operating.
Remote controller reset.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Check the power supply to the indoor unit. See Power supply.
Possible cause:
▪
Faulty or disturbance of the power supply (imbalance),
▪
Phase missing,
▪
Power drop,
▪
Short circuit.
2
Perform a check of the indoor unit fan PCBs. See Indoor unit fan PCB.
Possible cause:
Faulty indoor unit fan PCB.
3
Perform a check of the indoor unit fan motors. See Indoor unit fan motor.
Possible cause:
Faulty indoor unit fan motor.
4
Perform a check of the indoor unit main PCB. See Indoor unit PCB.
Possible cause:
Faulty indoor unit main PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
3.2.14 A9-01 – Y1E Expansion valve coil abnormality
EKVDX-A units
Trigger
Effect
Reset
Upon power reset, Y1E
expansion valve coil is
NOT detected.
Unit will stop operating.
Power reset of indoor
unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1
Check the power supply to the indoor unit. See Power supply.
Possible cause:
▪
Faulty or disturbance of the power supply (imbalance),
▪
Phase missing,
▪
Power drop,
▪
Short circuit.
draft – 07/02/2022 15:12