Daikin J Series Service Manual page 141

SiBE041101
42 class: Activate power transistor test operation from indoor unit.
(1) When all the LEDs are lit uniformly, the compressor is defective.
(2) When the LEDs are not lit uniformly, check the power module.
(3) If NG in Check No.13, replace the power module (PCB).
(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,
(2) On completion of diagnose by the inverter checker, be sure to re-crimp the FASTON
Service Diagnosis
1) Turn the power on.
2) Select FAN operation with the [MODE] button on the remote controller.
3) Press the 3 buttons (TEMP , TEMP , MODE) simultaneously.
→ 00
is displayed with the figure of ten's place blinking.
4) Press the [MODE] button.
→ 00
is displayed with the figure of one's place blinking.
5) Press the [MODE] button.
→ T
is displayed.
6) Press the [ON/OFF] button.
→
Power transistor test operation starts.
Diagnose method (Diagnose according to 6 LEDs lighting status.)
→
Replace the compressor.
→
Refer to Check No.13.
If OK in Check No.13, check if there is any solder cracking on the PCB.
If there is no solder cracking, replace the PCB.
the LEDs blink quicker. (The LEDs look like they are lit.)
terminals. Otherwise, the terminals may be burned due to loosening.
Direction of crimp
FASTON terminal
Check
This size is shortened
by "crimp".
(R5161)
130