Daikin Emura RXJ20A5V1B Service Manual page 141

Problem solved?
Repair procedures
To remove the propeller fan blade assembly
RXJ20~50A + FTXJ-A(W)(S)(B)
Split Emura 3 R32
ESIE22-04B – 2022.08
13 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 unit MUST be kept powered.
14 Manually (slowly) rotate the fan blade propeller 1 turn and measure the
voltage on the DC fan motor connector pins 1-4.
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.
a Nut
b Propeller fan blade assembly
3 Pull and remove the propeller fan blade assembly from the DC fan motor
assembly.
Action
Perform a check of the main PCB, see
"Checking procedures" [
Replace the DC fan motor, see
procedures" [
Action
No further actions required.
Return to the troubleshooting of the
specific error and continue with the
next procedure.
"4.14 Plate
a b
4 Components
|
4
117].
"Repair
4
141].
4
work" [ 144].
Service manual
141