Daikin FTK24NMVJU - 3.3 Facility Setting Switch (cooling at low outdoor temperature) (Only for RK(X) series)

SiUS041501E Check
Service Diagnosis 96
Step 3
Activate power transistor test operation from the indoor unit.
(1) Turn the power on.
(2) Press the center of the TEMP button and the OFF button on the remote controller at the same
time.
(3) Select
T
with the TEMP or TEMP button.
(4) Press the FAN button.
(5) Press the FAN ONLY button to start the power transistor test operation.

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.
HEAT PUMP model COOLING ONLY model
OFF
button
(R21675)
(R15292)
Direction of crimp
FASTON terminal
This size is shortened
by the crimp.