Repair Procedures - Daikin RXTA30B2V1B Service Manual

4 | Components

4.14.2 Repair procedures

To remove the main PCB
Service manual
132
VDC Com
V DC+
W DC+
DC– U
DC– V
DC– W
Are the test results OK?
Yes
No
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 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
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).
Ref VDC
0.501 V DC+
0.501 V DC+
0.501 V
0.501 V
0.501 V
Action
Power modules are OK. Return to
"4.14.1 Checking
the main PCB and continue with the
next procedure.
Replace the main PCB, see
"4.14.2 Repair
e
c
(B)+FTXTM30+40R2V1B+FTXTP25+35M5V1B+ATXTP25+35M5V1B
Com
V
W
U DC–
V DC–
W DC–
procedures" [
procedures" [ 4
4
"4.17 Plate work" [
f
b d
RXTM-R+RXTP-R+ARXTP-R+RXTA-B+FTXTA30B2V1B(W)
R32 Optimized Heating 4 Split
ESIE21-12A – 2022.02
Ref
O.L
O.L
O.L
O.L
O.L
4
126] of
132].
144].