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B4. LED blinks five times, then repeats (Locked Piston: A & E Inverters)
Protection Logic
Blink Blink Blink Blink Blink OFF
Protection
logic
Check B
Blink 5 times
(Lock Piston Trip) Check B4
Compressor
Doesn’t work
Repeat
Check Procedure
Reset
Power
Compressor
Doesn’t work
N
Y
Replace
Compressor
Hi side
restriction
N
Y
Sealed
system
Repair
- Purpose: To detect locked piston
- Cause: Lack of oil to the cylinder, cylinder or piston damaged and or restricted discharge.
A Locked Piston can also be caused by foreign materials inside the compressor.
- Logic: Compressor is forced off and tries to restart within 2.5 minutes.
B3. LED blinks three times, then repeats (Stroke Trip)
Protection Logic
Blink Blink Blink OFF
Protection
logic
Check B
Blink 3 times
(No Current Trip) Check B3
Compressor
Doesn’t work
Y
Reset
Power
Y
Y
Harness
Connecting
Check C
Y
Compressor
Damage
Check C
Replace
Compressor
No Connect trip
occur?
Replace
Drive PCB
Repeat
Check Procedure
Fix Harness
N
N
N
N
- Purpose: Prevent over voltage and current detecting connecting error.
- Cause: -. Connecting error of PCB and Comp, Capacitor Harness -. Comp insulation damage
Logic: Compressor is forced off and tries to restart within 40 seconds.
Blink Blink Blink OFF
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