Compressor; Checking Procedures - Daikin RXM20R Service Manual

4.2 Compressor

4.2.1 Checking procedures

To perform an auditive check of the compressor
RXM20~71R(9) + ARXM25~71R(9) + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11B – 2022.02
WARNING
When reconnecting a connector to the PCB, make sure to connect it on the correct
location and do NOT apply force, as this may damage the connector or connector
pins of the PCB.
5 Fix the 4‑way valve coil harness using new tie straps.
Is the problem solved?
Yes
No
INFORMATION
It is recommended to perform the checks in the listed order.
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
Prerequisite: Remove the required plate work, see
1 Open the compressor insulation.
2 Turn ON the power using the respective circuit breaker.
3 Start the unit operation via the user interface.
4 Wait for - or create condition to operate the compressor.
5 Listen to the compressor when it tries to operate. Judge if a mechanical lock is
present.
INFORMATION
If you have a multimeter with data logging functionality, record the current in 1 of
the U‑V‑W wires at compressor start‑up. If mechanical lock is present, logged current
will drastically increase to a peak value and the unit will trigger an error.
INFORMATION
If a mechanical lock is present, also check and eliminate the root cause. Mechanical
lock is most likely caused by lack of lubrication (which might be related to overheat
or wet operation), failing crankcase heater (if available), impurities in the refrigerant,
....
A mechanical lock is present on the
compressor?
Yes
4
|
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
"4.14 Plate work" [
Action
Replace the compressor, see
"4.2.2 Repair procedures" [
Components
4
153].
4
63].
Service manual
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