Daikin FTX09NMVJU Service Manual page 117

SiUS091601E
Step 3
Activate power transistor test operation from the indoor unit.
(1) Turn the power on.
(2) Press the center of TEMP button and OFF button on the remote controller at the same time.
(3) Select T with TEMP
(4) Press FAN button.
(5) Press FAN ONLY button to start the power transistor test operation.
(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.
Caution
(1) When the output frequency is low, the LEDs blink slowly. As the output frequency increases, the
(2) On completion of the inverter analyzer diagnosis, be sure to re-crimp the FASTON terminals.
Service Diagnosis
or TEMP
Diagnose method (Diagnose according to 6 LEDs lighting status.)
→ 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.)
Otherwise, the terminals may be burned due to loosening.
button.
OFF
button
(R23157)
Direction of crimp
FASTON terminal
Check
This size is shortened
by the crimp.
(R15292)
106