Daikin VRV IV+ Service Manual page 236

3 | Components
3.4.2 Repair procedures
To remove the crankcase heater
Service manual
236
3 Connect the Megger ground test lead directly to the crankcase heater ground
wire.
CAUTION
Do NOT connect the Megger ground test lead to any other ground wire.
4 Measure the insulation resistance between the phase and ground wire. The
measured insulation resistance MUST be >100 MΩ.
Is the measured insulation resistance
correct?
Yes
No
Prerequisite: Stop the unit operation via the central controller.
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see
DANGER: RISK OF ELECTROCUTION
Confirm the rectifier voltage is below 10 V DC before proceeding, see
rectifier voltage" [
2 Open the compressor insulation.
3 Detach the spring that fixes the crankcase heater on the compressor.
a
a Spring
b Crankcase heater
4 Cut all tie straps that fix the crankcase heater harness.
5 Disconnect the crankcase heater connector from the appropriate PCB.
6 To install the crankcase heater, see
Action
Return to the troubleshooting of the
specific error and continue with the
next procedure.
Replace the crankcase heater, see
"3.4.2 Repair
"3.15 Plate
4
356].
b
"3.4.2 Repair
4
procedures" [ 236].
4
work" [ 315].
"To check the
4
procedures" [ 236].
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05