H1-00 - External Temperature Sensor Problem - Daikin EBLA04E V Series Service Manual

3 | Troubleshooting
3.3.50 H1-00 – External temperature sensor problem
Service manual
54
draft – 31/05/2022 15:53
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
2 Check if the power supply is compliant with the regulations. See
4
circuit" [ 254].
Possible cause:
▪ Faulty or disturbance of the power supply (power supply MUST be within
range of nominal operating voltage ±4%),
▪ Power drop,
▪ Short circuit.
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
3 Wait until the rectifier voltage is below 10 V DC.
DANGER: RISK OF ELECTROCUTION
Confirm the rectifier voltage is below 10 V DC before proceeding, see
electrical hazards" [
4 Check that the thermal interface grease is applied properly on the (PCB or
refrigerant piping) contact surface of the heat sink. Adjust if needed.
Possible cause: Thermal interface grease NOT applied properly on the heat
sink.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Optional external indoor
or outdoor ambient
thermistor input is out of
range.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Perform a check of the external indoor or outdoor ambient thermistor. See
4
"4.19 Thermistors" [
Possible cause: Faulty external indoor or outdoor ambient thermistor.
2 Perform a check of the hydro PCB. See
Possible cause: Faulty hydro PCB.
"4.14 Main
4
254].
Effect
Unit will NOT stop
operating.
217].
"4.12 Hydro
4
PCB" [ 184].
"5.1 Electrical
"To prevent
Reset
Automatic reset when
input is in range.
4
PCB" [ 175].
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05