![background image](http://html1.mh-extra.com/html/daikin/split-comfora-r32/split-comfora-r32_service-manual_2459095088.webp)
2
|
Components
Service manual
88
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
Split Comfora R32
ESIE18-01C – 2020.07
INFORMATION
The measured resistance values may deviate from the listed values due to instability
during the measurements.
DC fan motor resistance measurements
are correct?
Action
Yes
Continue with the next step.
No
90].
6
Turn ON the power of the unit.
7
With the DC fan motor connector S71 disconnected from the inverter PCB,
measure the voltage on the connector pins 4-7 (= fan motor power supply) on
the inverter PCB.
Result:
The voltage MUST be 200~390 V DC.
8
Measure the voltage on the connector pins 4-3 (= fan motor control) on the
inverter PCB.
Result:
The voltage MUST be 15±10% V DC.
Is the measured voltage on the DC fan
motor connector on the inverter PCB
correct?
Action
Yes
Replace the DC fan motor assembly, see
No
Perform a check of the inverter PCB,
see
73].
To perform an electrical check of the DC fan motor assembly (fan motor rotates for a short
time)
1
First perform a functionality check of the outdoor unit fan motor assembly,
see
86].
INFORMATION
The DC fan motor connector MUST be plugged into the appropriate PCB.
2
Confirm via the service monitoring tool that the DC fan motor assembly
receives an ON signal.
3
Turn OFF the unit via the user interface.
4
Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Wait for at least 10 minutes after the circuit breaker has been turned OFF, to be sure
the rectifier voltage is below 10 V DC before proceeding.
5
Disconnect the DC fan motor connector S71 and measure the resistance on
the connector pins shown below. The measured resistance MUST be:
VDC
Comm
Resistance
VDC
Comm
Resistance
4
1
OL
1
4
OL
4
2
108 kΩ
2
4
108 kΩ