3
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Components
Service manual
107
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
Did the fuse blow or did the field
supplied circuit breaker of the backup
heater trip?
Action
No
Return to
104] of the backup
heater and continue with the next
procedure.
To perform a check of the backup heater contactor(s)
Prerequisite:
First perform an electrical check of the backup heater, see
104].
1
Measure the power supply voltage between the following terminals of the
backup heater contactor:
▪
K1M: 2‑4
The measured voltages MUST be 230 V AC ± 10%.
Is the measured power supply voltage
correct?
Action
Yes
Skip the next step.
No
Continue with the next step.
2
Check the power supply (source) of the backup heater.
Is the power supply (source) of the
backup heater correct?
Action
Yes
Correct the wiring and/or components
between the power supply (source) and
the backup heater contactor K1M, see
314].
No
Adjust the power supply (source) of the
backup heater.
3
With the
Actuator test run
still active, activate backup heater: step 1.
4
Measure the voltage between the following terminals of the backup heater
contactor.
▪
K1M: 1‑3 / 2‑4
The measured voltages MUST be 230 V AC ± 10%.
a
a
Backup heater contactor K1M
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