Daikin Altherma 3 M - Page 107

3 | 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 "Checking
procedures"[4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 "Checking
procedures"[4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
"6.2Wiring diagram"[4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