Installation Condition Check - Daikin FTXN25KEV1B Service Manual

Check
(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.22, 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
5.8

Installation Condition Check

Check No.17
92
Diagnose method (Diagnose according to 6 LEDs lighting status.)
→
Replace the compressor.
→
Refer to Check No.22.
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.
the LEDs blink quicker. (The LEDs look like they are lit.)
terminals. Otherwise, the terminals may be burned due to loosening.

Installation condition check

Check the allowable
dimensions of the air
suction and
discharge area.
OK
Is the discharged air
short-circuited?
NO
Is the outdoor heat
exchanger very dirty?
NO
Is the airflow blocked by
obstacles or winds
blowing in the opposite
direction?
NO
Direction of crimp
FASTON terminal
NG
YES
YES
YES
SiBE041102_A
This size is shortened
by the crimp.
(R15292)
Change the installation
location or direction.
Change the installation
location or direction.
Clean the outdoor heat
exchanger.
Change the installation
location or direction.
Check the outdoor temperature.
(The outdoor temperature
should be 46˚C or lower.)
(R14390)
Service Diagnosis