H3-00 - Outdoor Unit: Malfunction Of High Pressure Switch; H4-00 - Low Pressure Switch Abnormality - Daikin Sky Air Advance RZA200D7Y1B Service Manual

2 | Troubleshooting
2.4.10 H3-00 – Outdoor unit: Malfunction of high pressure switch
2.4.11 H4-00 – Low pressure switch abnormality
Service manual
26
Possible cause: Faulty expansion valve.
7 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
8 Perform a check
"3.15 Thermistors" [
Possible cause: Faulty refrigerant side thermistor(s).
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
High pressure switch is
activated when
compressor is off.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the high pressure switch. See
4
switch" [ 78].
Possible cause: Faulty high pressure switch.
2 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
3 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
When there is no
continuity in the low
pressure switch during
compressor start.
"3.9 Main
of all refrigerant
4
128].
Effect
Unit will stop operating.
"3.9 Main
Effect
Unit will stop operating.
4
PCB" [ 95].
side thermistors.
Reset
Manual reset via user
interface.
"3.6 High pressure
4
PCB" [ 95].
"4.1 Electrical
Reset
Automatic reset.
RZA200+250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05
See