Rotation Pulse Check On The Outdoor Unit Pcb - Daikin K-Series Service Manual

SiBE061121.book Page 124 Monday, April 25, 2011 3:21 PM
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.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
5.8

Rotation Pulse Check on the Outdoor Unit PCB

Check No.16 25/35 class
1. Check that the 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 -
124
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.
12, 10 - 13, when the fan motor is manually rotated once.
S70
13
12
11
10
9
8
7
6
5
4
3
2
1
Direction of crimp
FASTON terminal
HV (Hall IC)
HU (Hall IC)
15 VDC
Free pin
Free pin
Phase W
Free pin
Free pin
Phase V
Free pin
Free pin
Phase U
(R11907)
SiBE061121
This size is shortened
by "crimp".
(R5161)
Service Diagnosis