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Components
Service manual
105
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
ESIE20-06A – 2021.03
To perform a resistance check of the backup heater
Prerequisite:
Stop the unit operation via the user interface.
Prerequisite:
Turn OFF the respective circuit breaker.
1
Remove the required plate work, see
a
a
Backup heater contactor K1M
2
Measure the backup heater resistance between K1M/1 and K1M/3.
Result:
The measured resistance MUST be approximately 18 Ω.
INFORMATION
314] for more detailed information.
INFORMATION
Make sure that the wiring between the backup heater contactors and the backup
heater connector is properly connected and NOT damaged (check continuity), see
314].
Is the measured backup heater
resistance correct?
Action
Yes
Return to
104] of the backup
heater and continue with the next
procedure.
No
Replace the backup heater, see
108].
To perform an insulation check of the backup heater
Prerequisite:
First perform a resistance check of the backup heater, see
104].
1
Open all circuit breakers.
CAUTION
To prevent damage to the unit, all circuit breakers MUST be opened before using a
Megger.
2
Set the Megger voltage to 500 V AC.
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