3 | 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 "3.17Plate work"[4230].
a Backup heater contactor K1M
2 Measure the backup heater resistance between K1M/1 and K1M/3.
Result: The measured resistance MUST be approximately 18Ω.
INFORMATION
See the "6.2Wiring diagram"[4314] 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
"6.2Wiring diagram"[4314].
Is the measured backup heater
resistance correct?
Action
Yes Return to "Checking
procedures"[4104] of the backup
heater and continue with the next
procedure.
No Replace the backup heater, see "Repair
procedures"[4108].
To perform an insulation check of the backup heater
Prerequisite: First perform a resistance check of the backup heater, see "Checking
procedures"[4104].
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 500VAC.