Daikin RXTA30B2V1B Service Manual page 61

To perform an insulation check of the compressor
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
Inverter voltage measurements are
correct?
Yes
No
12 While compressor is operating, measure the current in each phase U, V and
W. ALWAYS measure at the PCB side.
Result: 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
"4.2.1 Checking procedures" [
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Wait until the rectifier voltage is below 10 V DC.
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.
2 Remove the cover of the compressor wire terminals.
a Compressor wire terminals cover
3 Disconnect the Faston connectors from the compressor wire terminals U, V
and W.
Action
Continue with the next step.
Perform a check of the appropriate PCB,
see "4 Components" [
Action
Perform an insulation check of the
compressor, see
procedures" [
Preventively replace the compressor,
see "4.2.2 Repair
4
57].
a
4 Components
|
4
50].
"4.2.1 Checking
4
57].
4
procedures" [ 62].
Service manual
61