B5. LED blinks seven times, then repeats
Protection Logic
Blink
Blink
Blink
Blink Blink Blink Blink OFF
Protection
logic
Check B
Blink 7 times
(Lock Piston Trip) Check B5
Compressor
Doesn’t work
Y
N
Repeat
Check Procedure
Replace
Drive PCB
N
Y
Check IPM
visual inspection
(turn off)
Short
Test
Point A
Power
Reset
Compressor
Damage
Check C3
Replace
Compressor
NG
Y
Modify
- Purpose: Prevent high current due to IPM Short
- Cause: Damaged IPM (Dead Short)
- Test for a dead short at
Point A
with a VOM.
- Logic: Compressor is forced off and tries to restart in 20 seconds.
A
41
Summary of Contents for LDCS24223B
Page 13: ...5 CIRCUIT DIAGRAM 13 ...
Page 63: ...October 2015 P No MFL31442315 ...