2 | Troubleshooting
Service manual
42
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
1 Perform a check of the external indoor or outdoor ambient thermistor. See
"3.20Thermistors"[4248].
Possible cause: Faulty external indoor or outdoor ambient thermistor.
2 Perform a check of the hydro PCB. See "3.12Hydro PCB"[4160].
Possible cause: Faulty hydro PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.42 H3-00 – Outdoor unit: Malfunction of high pressure switch
Trigger Effect Reset
High pressure switch is
activated when
compressor is off.
Unit will stop operating. Manual reset via user
interface.
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 "3.11 High pressure
switch"[4157].
Possible cause: Faulty high pressure switch.
2 Perform a check of the main PCB. See "3.14Main PCB"[4171].
Possible cause: Faulty main PCB.
3 Check if the power supply is conform with the regulations. See "4.1Electrical
circuit"[4284].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >4%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
2.3.43 H4-00 – Malfunction of low pressure switch
Trigger Effect Reset
Low pressure switch is
defective or NOT well
connected.
Unit will stop operating. Manual reset via user
interface.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.