Daikin FDMQ-R Series Service Manual page 116

Check
Step 3
Activate power transistor test operation from the outdoor unit.
Note: Power transistor test operation can be activated only once after turning on the power supply.
If reactivation of the power supply transistor operation is needed, turn the power supply off and then
on again.
With Wired Remote Controller (BRC1E73)
With Wireless Remote Controller (BRC082A43)
1. If all the LEDs are lit uniformly, the compressor is defective.
2. If the LEDs are not lit uniformly, check the power module.
3. If NG in Check No.22, replace the power module.
4. If any solder cracking is found, replace the PCB or repair the soldered section.
105
Start method of power transistor test operation
1. Turn the power on.
2. Set FAN operation using the remote controller.
3. Press and hold Cancel button for 4 seconds or
longer.
4. Select Test Operation
menu, then press Menu/OK button.
Basic screen returns and "Test Operation"
is displayed at the bottom.
5. Press On/Off button within 10 seconds.
3 minutes after pressing On/Off button,
power transistor test operation will start.
• Test operation will stop automatically after
about 30 minutes.
To stop the operation, press On/Off button.
1. Turn the power on.
2. Press and select FAN operation.
3. Press twice. "TEST" is displayed.
4. Press within 10 seconds.
3 minutes after pressing
• Test operation will stop automatically after about 30 minutes.
To stop the operation, press
Diagnose method (Diagnose according to 6 LEDs lighting status of the inverter analyzer.)
→ Replace the compressor.
→ Refer to Check No.22.
(Replace the main PCB. The power module is united with the main PCB.)
If OK in Check No.22, check if there is any solder cracking on the PCB.
If there is no solder cracking, replace the PCB.
in the service settings
, power transistor test operation will start.
.
Basic screen
2.
3.
Fan
Press and hold Cancel
button for 4 seconds or
longer during backlight lit.
Service Settings
menu screen
4.
Service Settings 1/3
Test Operation
Maintenance Contact
Field Settings
Press Menu/OK button.
Energy Saving Options
Prohibit Function
Min Setpoints Differential
Setting
5.
Fan
Press On/Off button
(within 10 seconds).
Test Operation
Service Diagnosis
SiUS071735EA