4
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Components
Service manual
132
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
(B)+35M5V1B
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
VDC
Com
Ref
VDC
Com
Ref
V
DC+
0.501 V
DC+
V
O.L
W
DC+
0.501 V
DC+
W
O.L
DC–
U
0.501 V
U
DC–
O.L
DC–
V
0.501 V
V
DC–
O.L
DC–
W
0.501 V
W
DC–
O.L
Are the test results OK?
Action
Yes
Power modules are OK. Return to
the main PCB and continue with the
next procedure.
No
Replace the main PCB, see
4.14.2 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
144].
1
Disconnect the compressor connector.
2
Cut the tie straps to disconnect the compressor wiring harness (part
connected to the PCB) from the switch box.
3
Disconnect the power supply wires from the main power supply terminal
X1M.
a
e
b
c
d
f
a
Compressor wiring harness
b
Power supply wiring
c
Red wire
d
Ground wire
e
Screw
f
Terminal X1M
4
Disconnect the red wire from the terminal X1M.
5
Remove the ferrite core(s) (for power supply wiring) from the switch box
(unplug fixation plug).
Summary of Contents for RXTA30B2V1B
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