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4
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Components
Service manual
175
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05
4.12 Hydro PCB
4.12.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed order.
To perform a power check of the hydro PCB
Prerequisite:
Stop the unit operation via the user interface.
Prerequisite:
Turn OFF the respective circuit breaker.
1
Remove the required plate work, see
2
Turn ON the power of the unit.
3
Measure the voltage on the connectors X1A: 1‑3 and X19A: 1‑3 on the hydro
PCB.
Result:
The measured voltage MUST be 230 V AC.
a
b
a
Connector X1A
b
Connector X19A
Is the measured voltage on the hydro
PCB correct?
Action
Yes
Return to
175] of the hydro PCB
and continue with the next procedure.
No
Continue with the next step.
4
Check the power supply to the unit, see
254].
Does the unit receive power?
Action
Yes
Correct the wiring between the main
power supply terminal and the hydro
PCB, see
178].
No
Adjust the power supply to the unit, see
draft – 31/05/2022 15:53
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