Daikin VAM350J8VEB, Руководство по обслуживанию

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3 | Troubleshooting
Service manual
32
VAM350~200 EKVDX32~100A2VEB
VRV system air conditioner
ESIE22-07 – 2022.02
2 Perform a power reset. If the error disappears and is raised again after a
while, check for the presence of an external source causing electrical noise.
See External factors.
Possible cause: External source may cause interference.
3 Perform a check of the indoor unit expansion valve. See Expansion valve.
Possible cause: Faulty expansion valve.
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.
3.2.15 A9-02 – Y1E Expansion valve body abnormality
EKVDX-A units
Trigger Effect Reset
Difference between gas
temperature and liquid
temperature too high or
liquid temperature too
low during cooling
operation, thermostat
OFF. The indoor unit with this
error will stop refrigerant
flow (expansion valve
OFF) and VAM unit will
resume fan operation (fan
ON). All other indoor units
and outdoor unit will
continue 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.
2 Perform a power reset. If the error disappears and is raised again after a
while, check for the presence of an external source causing electrical noise.
See External factors.
Possible cause: External source may cause interference.
3 Perform a check of the indoor unit refrigerant gas thermistor. See
Thermistors.
Possible cause: Faulty refrigerant gas thermistor or connector fault.
4 Perform a check of the indoor unit refrigerant liquid thermistor. See
Thermistors.
Possible cause: Faulty refrigerant liquid thermistor.
5 Perform a check of the indoor unit expansion valve. See Expansion valve.
draft – 07/02/2022 15:12