Daikin FTXG20LV1BW, Service Manual

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Check SiBE041401E
97 Service Diagnosis
„
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.
5.8 Rotation Pulse Check on the Outdoor Unit PCB
Check No.16 20/25/35 class
1. Check that the control voltage between the pins 10 - 11 is 15 VDC.
2. Check if the Hall IC generates the rotation pulse (0 ~ 15 VDC) 4 times between the pins 10 -
12, 10 - 13, when the fan motor is manually rotated once.
(R19646)
Direction of crimp
FASTON terminal
This size is shortened
by the crimp.
13
12
11
10
9
8
7
6
5
4
3
2
1
S70
Phase U
Control voltage 15 VDC
Phase V
Phase W
HU (Hall IC)
HV (Hall IC)
Free pin
Free pin
Free pin
Free pin
Free pin
Free pin
(R19957)