3
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Components
Service manual
131
RXM20~71R + ARXM25~71R + FTXM20~71R + ATXM25~50R +
FVXM25~50A
Split New Perfera R32
ESIE20-11 – 2021.01
Is the problem solved?
Action
No
Return to the troubleshooting of the
specific error and continue with the
next procedure.
Repair procedures
To remove the main PCB
Prerequisite:
Stop the unit operation via the user interface.
Prerequisite:
Turn OFF the respective circuit breaker.
Prerequisite:
Remove the required plate work, see
1
Disconnect the power supply wires from the main power supply terminal X1M
and route the wires out of the ferrite core(s).
e
e
e
e
e
f
a
a
b
c
d
a
Power supply wires from X1M
b
Wire from X1M
c
Ground wiring
d
Connector X11A
e
Screw
f
Main PCB
2
Disconnect the wire from the terminal X1M and route the wire out of the
ferrite core(s).
3
Remove the screw and remove the ground wiring from the switch box. Route
the ground wire out of the ferrite core.
4
Disconnect the connector X11A.
5
Disconnect all other connectors from the main PCB.
6
Remove the screws from the main PCB.
7
Remove the main PCB from the unit.
8
To install the main PCB
1
Apply grease to the PCB contact surface of the heat sink. Distribute the grease
as evenly as possible.
CAUTION
ALWAYS apply new grease on the PCB heat sink. NOT doing so may cause the PCB to
fail due to insufficient cooling.
2
Install the main PCB in the correct location in the switch box.
