Daikin Comfora FTXP20~71L2V1B, Service Manual

Page: 29 / 68

2 Components
Service manual
29
ATXP20~3 FTXP20~7 ARXP20~3
RXP20~71L2V1B
Split Comfora R32
ESIE18-01 – 2019.02
a a
b
c
d
e
a Grouding wire screw
b Heat exchanger thermistor
c Indoor unit PCB
d Switch box screw
e Switch box
5 Route the connectors of the indoor unit fan motor and swing
flap motor inside the switch box and connect them to the indoor
unit PCB.
6 Install and tighten the screw to secure the switch box.
7 Install the heat exchanger thermistor in its holder.
8 Connect the grounding wires to the heat exchanger using the
screws.
Is the problem solved? Action
Yes No further actions required.
No Return to the troubleshooting of
the specific error and continue
with the next procedure.
2.6 Indoor unit PCB
2.6.1 Checking procedures
INFORMATION
It is recommended to perform the checks in the listed
order.
To perform a power check of the indoor unit PCB
1 Measure the voltage between the black and white wires on the
PCB. The measured voltage MUST be 16 V DC.
a
b
a Black wire
b White wire
Is the measured voltage on the
indoor unit PCB correct? Action
Yes Return to "2.6.1 Checking
procedures" on page 29 of the
indoor unit PCB and continue
with the next procedure.
No Adjust the power of the indoor
unit PCB, see
"2.6.2 Repair
procedures" on page 30 .
To perform an electrical check of the indoor unit
PCB
Procedure not available yet.
To check if the correct spare part is installed
1 Visit your local spare parts webbank.
2 Enter the model name of your unit and check if the installed
spare part number corresponds with the spare part number
indicated in the webbank.
Is the correct spare part for the
indoor unit PCB installed? Action
Yes Return to "2.6.1 Checking
procedures" on page 29 of the
indoor unit PCB and continue
with the next procedure.
No Replace the indoor unit PCB, see
"2.6.2 Repair procedures" on
page 30
.
To check the wiring of the indoor unit PCB
1 Check that all connectors are fully plugged‑in. All colour codes
MUST correspond.
2 Check that no connectors are damaged.
3 Check that the wiring corresponds with the wiring diagram, see
"5.2 Wiring diagram" on page 50 .
Is the wiring on the indoor unit
PCB correct? Action
Yes Return to "2.6.1 Checking
procedures" on page 29 of the
indoor unit PCB and continue
with the next procedure.
No Adjust the wiring of the indoor
unit PCB, see
"2.6.2 Repair
procedures" on page 30 .
To check the fuse of the indoor unit PCB
1 Measure the continuity of the fuse. If no continuity is measured,
the fuse is blown.