Daikin Sensira Series Service Manual page 94

2 | Components
Problem solved?
Repair procedures
To remove the propeller fan blade assembly
Service manual
94
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.
CAUTION
Ensure that the system CANNOT start the fan. Disable all modes (heating, cooling, ...)
on the unit. The outdoor 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
After all checking procedures listed above have been performed:
Is the problem solved?
Yes
No
Prerequisite: Stop the unit operation via the user interface.
Prerequisite: Turn OFF the respective circuit breaker.
1 Remove the required plate work, see
2 Remove the nut that fixes the propeller fan blade assembly.
Action
Continue with the next step.
Perform a check of the main PCB, see
"Checking procedures" [
Action
Perform a check of the main PCB, see
"Checking procedures" [
Replace the DC fan motor, see
4
procedures" [ 94].
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
4
"2.10 Plate work" [
FTXF20~71A + FTXF20~25B + FTXF20~42C + ATXF20~71A + ATXF20~42C
+ RXF20~71A + RXF20~60B + RXF20~42C + ARXF20~71A + ARXF20~42C
4
74].
4
74].
"Repair
101].
Split Sensira R32
ESIE18-12E – 2021.02