Daikin FTXP20-71L Service Manual page 103

ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
Split Comfora R32
ESIE18-01E – 2023.01
CAUTION
Ensure that the system CANNOT start the fan. Disable all modes (heating, cooling, ...)
on the unit. The unit MUST be kept powered.
12 Manually (slowly) rotate the fan blade propeller 1 turn and measure the
voltage on the DC fan motor connector pins 10-12.
Result: 4 pulses MUST be measured.
13 Repeat the previous step and measure the voltage on the DC fan motor
connector pins 10-13.
Result: 4 pulses MUST be measured.
Pulses are measured during fan blade
propeller rotation?
Yes
No
ARXP20~35N + RXP20~35N units
1 First perform a mechanical check of the DC fan motor assembly, see
4
procedures" [ 100].
INFORMATION
Check the DC fan motor power supply (voltage) circuit on the PCB.
2 Turn ON the power of the unit.
3 Activate Cooling or Heating operation via the user interface.
4 Check the functioning of the outdoor unit fan.
Outdoor unit fan ...
Rotates continuously (without
interruption)
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 between the
pins 1-3, 1-5, and 3-5 of the DC fan motor connector.
Result: All measurements MUST be 83.2~92 Ω.
3
|
Action
Perform a check of the main PCB, see
"3.7.1 Checking procedures" [
Replace the DC fan motor, see
4
procedures" [ 104].
Action
DC fan motor assembly is OK. Return to
the troubleshooting of the specific error
and continue with the next procedure.
Continue with the next step.
Components
4
84].
"Repair
"Checking
Service manual
103