Daikin Split Comfora R32 Service Manual page 87

To perform a functionality check of the DC fan motor assembly
To perform an electrical check of the DC fan motor assembly (fan motor does not rotate)
ATXP20~35 + FTXP20~71 + ARXP20~35 + RXP20~71
Split Comfora R32
ESIE18-01C – 2020.07
Is the DC fan motor shaft friction
normal?
No
1 First perform a mechanical check of the DC fan motor assembly, see
4
procedures" [ 86].
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
Rotates for a short time
1 First perform a functionality check of the outdoor unit fan motor assembly,
see "Checking procedures" [
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
4 1
4 2
4 3
4 7
Action
Replace the DC fan motor assembly, see
"Repair procedures" [
Action
DC fan motor assembly is OK. Return to
the troubleshooting of the specific error
and continue with the next procedure.
Perform an electrical check of the DC
fan motor assembly (fan motor does
not rotate), see
procedures" [
Perform an electrical check of the DC
fan motor assembly (fan motor rotates
for a short time), see
procedures" [
4
86].
Resistance VDC
OL 1
108 kΩ 2
1.2 kΩ 3
OL 7
2 Components
|
4
90].
"Checking
"Checking
4
86].
"Checking
4
86].
Comm Resistance
4 OL
4 108 kΩ
4 1.2 kΩ
4 OL
Service manual
87