Daikin FTXM-V Series Service Manual page 143

SiUS042113E
Reference:
If the terminals of the compressor are not FASTON terminals (difficult to remove the wire on the
terminals), it is possible to connect wires available on site to the outdoor unit from output side of
PCB. Do not connect them to the compressor at the same time, otherwise it may result in incorrect
detection.
Step 3
Activate power transistor test operation from the indoor unit.
1. Turn the power on.
2. Select FAN operation with Mode button on the remote controller.
3. Press the center of Temp button and Mode button at the same time.
4. Select T with Temp or Temp button.
5. Press Mode button to start the power transistor test operation.
 Diagnose method (Diagnose according to 6 LEDs lighting status of the inverter analyzer.)
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, the power module is defective.
4. If any solder cracking is found, replace the PCB or repair the soldered section.
Caution
1. When the output frequency is low, the LEDs blink slowly. As the output frequency increases, the
Part 6 Service Diagnosis
(1) Remove the terminals from
the compressor.
Compressor
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.
LEDs blink quicker. The LEDs look like they are lit.
(2) Connect the terminals to the
terminals of the inverter
analyzer.
Compressor
Inverter analyzer
Be careful not to let the terminals (U,V,W)
touch each other. Otherwise, high voltage
is applied.
Check
(R22731)
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