Daikin EBLA04E V Series Service Manual page 126

4 | Components
To perform an insulation check of the backup heater
To perform an electrical check of the backup heater
Service manual
126
draft – 31/05/2022 15:53
INFORMATION
See the "7.2 Wiring
Is the measured backup heater
resistance correct?
Yes
No
Prerequisite: First perform a resistance check of the backup heater, see
4
procedures" [ 125].
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.
3 Connect the Megger ground test lead directly to the backup heater ground
wire.
CAUTION
Do NOT connect the Megger ground test lead to any other ground wire.
4 Measure the insulation resistance between the following terminals. The
measured insulation resistance MUST be >3 MΩ.
▪ K1M1‑ground
▪ K1M3‑ground
▪ K1M5‑ground
▪ K2M1‑ground
▪ K2M3‑ground
▪ K2M5‑ground
Is the measured backup heater
insulation resistance correct?
Yes
No
Prerequisite: First perform an insulation check of the backup heater, see
4
procedures" [ 125].
Prerequisite: Check the circuit breaker. Reset if it has tripped.
4
diagram" [ 281] for more detailed information.
Action
Return to
procedures" [
heater and continue with the next
procedure.
Replace the backup heater, see
procedures" [
Action
Return to
procedures" [
heater and continue with the next
procedure.
Replace the backup heater, see
procedures" [
"Checking
4
125] of the backup
"Repair
4
130].
"Checking
"Checking
4
125] of the backup
"Repair
4
130].
"Checking
EBLA04~08E + EDLA04~08E
Daikin Altherma 3 M
ESIE22-09 – 2022.05