SiBE05-722EE Check
Service Diagnosis 107
RXS25/35L3V1B
Activate power transistor test operation from indoor unit.
(1) Turn the power on.
(2) Select FAN operation with the MODE button on the remote controller.
(3) Press the center of the TEMP button and the MODE button at the same time.
→
00
is displayed with the left-side number blinking.
(4) Press the MODE button.
→
00
is displayed with the right-side number 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.)
(1) If all the LEDs are lit uniformly, the compressor is defective.
→ Replace the compressor.
(2) If the LEDs are not lit uniformly, check the power module.
→ Refer to Check No.22.
(3) If NG in Check No.22, replace the power module.
(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.
(4) If any solder cracking is found, replace the PCB or repair the soldered section.
If there is no solder cracking, replace the PCB.
Caution
(1) When the output frequency is low, the LEDs blink slowly. As the output frequency increases,
the LEDs blink quicker. (The LEDs look like they are lit.)
(2) On completion of the inverter analyzer diagnosis, be sure to re-crimp the FASTON terminals.
Otherwise, the terminals may be burned due to loosening.
(R19646)
Direction of crimp
FASTON terminal
This size is shortened
by the crimp.
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