4
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Components
Service manual
61
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+35M5V1B
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
Inverter voltage measurements are
correct?
Action
Yes
Continue with the next step.
No
Perform a check of the appropriate PCB,
see
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?
Action
Yes
Perform an insulation check of the
compressor, see
No
Preventively replace the compressor,
see
To perform an insulation check of the compressor
Prerequisite:
First perform an electrical check of the compressor, see
57].
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
a
Compressor wire terminals cover
3
Disconnect the Faston connectors from the compressor wire terminals U, V
and W.
Summary of Contents for RXTA30B2V1B
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