Daikin Perfera RXM R Series Service Manual page 53

To perform an insulation check of the compressor
RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01
U Wire terminal U
V Wire terminal V
W Wire terminal W
7 Install the compressor insulation.
8 Turn ON the power using the respective circuit breaker.
9 Start the unit operation via the user interface.
10 Wait for – or create condition to operate the compressor.
11 Once the compressor operates, measure the U-V-W inverter voltages. All
measurements MUST be the same.
Inverter voltage measurements are
correct?
Yes
No
12 Measure the current in each phase U, V and W while compressor is operating.
All measurements MUST be the same.
Compressor motor winding current
measurements are correct?
Yes
No
Prerequisite: First perform an electrical check of the compressor, see
4
procedures" [ 49].
Prerequisite: Stop the unit operation via the user interface.
1 Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure
the rectifier voltage is below 10 V DC before proceeding.
V U
W
Action
Continue with the next step.
Perform a check of the appropriate PCB,
see "3 Components" [
Action
Perform an insulation check of the
compressor, see
4
procedures" [ 49].
Preventively replace the compressor,
see "Repair procedures" [
3 Components
|
4
41].
"Checking
4
55].
"Checking
Service manual
53