Self Protecting Function; Protection For Ic - Panasonic NR-CY54AG Service Manual

5. SELF PROTECTING FUNCTION

5.1 Protection for IC

1
Does IC receive IPM protect signal?
2
IC orders to stop compressor for 10 min.
After 10 min., does PCB check if IPM protect
3
signal is normal?
IC cancels to stop compressor.
4
Normal operating?
After restarting, does "Stop compressor"
5
occure 10 times within 2 min?
IC cancels to stop compressor.
6
Normal operating?
8
Does system protection cycle for 333 times?
9
IC order to stop compressor completely.
SYSTEM PROTECT CONTROL CYCLE
OPERATE each 7min X 10 times COMPRESSOR 1hour STOP
YES
YES
NO
YES
1st time
NO
• Normal operating.
• IC continues to stop compressor until 1 hour.
NO
• IC indicates Self Diagnosing sign.
• IC continues to stop compressor until 1 hour.
YES
• IC indicates Self Diagnosing sign.
7
After 1 hour.
SYSTEM PROTECT CONTROL CYCLE
333rd time
OPERATE each 7min X 10 times
- 7 -
STOP COMPRESSOR