Resistance Check; Isolation Check - Daikin EDLQO5CAV3 Service Manual

ESIE15-08B | Part 2. Troubleshooting

4.1.2. Resistance check

1. Measure the backup heater resistance (tolerance = ±10%).
3 kW
1~ 230 V
52.9 Ω
K1M/1 K5M/13
∞
K1M/3
∞
K1M/5
26.5 Ω
K1M/3 K1M/5
∞
K2M/1 K5M/13
∞
K2M/3
∞
K2M/5
52.9 Ω
K2M/3 K2M/5
∞
K1M/5 K2M/1

4.1.3. Isolation check

1. Switch off the Daikin Altherma Monobloc CA via the user interface.
2. Switch off the Daikin Altherma Monobloc CA with the field supplied circuit breaker.
C
AUTION
To prevent damage to the unit, F1B or F2B, K1M, K2M and K5M (if installed) must be OPENED before using a Meg-
ger.
3. Open circuit breakers K1M & K2M, K5M (if installed).
4. Set the Megger voltage to 500 VAC.
C
AUTION
Do not connect the Megger ground test lead to a another grounding wire.
5. Connect the Megger ground test lead directly to the backup heater ground wire (see red arrow below).
19/07/16
Daikin Altherma Monobloc CA
6 kW 6 kW 9 kW
1~ 230 V 3N~ 400 V 3N~ 400 V
52.9 Ω ∞
∞ 105.8 Ω
∞ 105.8 Ω
26.5 Ω 105.8 Ω
26.5 Ω ∞
∞ 52.9 Ω
∞ 52.9 Ω
52.9 Ω 52.9 Ω
∞ ∞
4. Component checklist - Water Circuit
∞
105.8 Ω
105.8 Ω
105.8 Ω
∞
52.9 Ω
52.9 Ω
52.9 Ω
∞
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