Daikin FTXP20-71L Service Manual page 102

3 | Components
Service manual
102
Outdoor unit fan ...
Does not rotate or rotates for a short
time
5 Turn OFF the unit via the user interface.
6 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.
7 Check that the DC fan motor connector is properly connected to the PCB.
8 Unplug the DC fan motor connector and measure the resistance on the
connector pins shown below. The measured resistance MUST be:
VDC
1
1
4
10 (GND)
INFORMATION
The measured resistance values may deviate from the listed values due to instability
during the measurements.
Are the measured resistance values
correct?
Yes
No
9 Turn ON the power of the unit.
10 With the DC fan motor connector S71 disconnected from the main PCB,
measure the voltage on the connector pins 10-11 (= fan motor control) on the
inverter PCB.
Result: The voltage MUST be 15±10% V DC.
Is the measured voltage correct?
Yes
No
11 Connect the DC fan motor connector to the PCB. Remove the plastic insert
from the connector for easier measurement.
Action
Continue with the next step.
Comm
4
7
7
1
4
7
11
12
13
Action
Continue with the next step.
Replace the DC fan motor, see
procedures" [
Action
Continue with the next step.
Perform a check of the main PCB, see
"3.7.1 Checking
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
Resistance
71~79 Ω
OL
1.96 kΩ
10.9 kΩ
"Repair
4
104].
4
procedures" [ 84].
Split Comfora R32
ESIE18-01E – 2023.01