Cooling/Heating Switch Abnormality - Daikin Sky Air Advance RZA200D7Y1B Service Manual

2 | Troubleshooting
2.4.8 EA-00 – Cooling/Heating switch abnormality
Service manual
24
Possible cause: Closed stop valve in the refrigerant circuit.
4 Check if the refrigerant circuit is clogged. See
Possible cause: Clogged refrigerant circuit.
5 Check if the refrigerant circuit is correctly charged. See
4
circuit" [ 137].
Possible cause: Refrigerant overcharge.
6 Check for the presence of non‑condensables and/or humidity in the
refrigerant circuit. See
Possible cause: Non‑condensables and/or humidity in the refrigerant circuit.
7 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
8 Check if the power supply is conform with the regulations. See
4
circuit" [ 135].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >10%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Room thermistor is NOT
functioning within
operation range.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the 4‑way valve. See
Possible cause: Faulty 4‑way valve.
2 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
3 Perform a check of the room thermistor. See service manual of the specific
indoor unit.
Possible cause: Faulty room thermistor.
4 Perform a check of the indoor unit PCB. See service manual of the specific
indoor unit.
Possible cause: Faulty indoor unit PCB.
"4.2 Refrigerant
"4.2 Refrigerant circuit" [
"3.9 Main
Effect
Unit will NOT stop
operating.
If the error occurs too
soon: unit will stop
operating.
"3.1 4-way
"3.9 Main
4
circuit" [
"4.2 Refrigerant
4
137].
4
PCB" [ 95].
"4.1 Electrical
Reset
Automatic reset after a
continuous operation for
some time.
Manual reset via user
interface.
4
valve" [ 50].
4
PCB" [ 95].
RZA200+250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05
137].