Self Protecting Function; Protecting For Ic - Panasonic NR-B37MV2 Service Manual

4. SELF PROTECTING FUNCTION

4.1 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
YES
YES
NO
YES
1st time
COMPRESSOR 1hour STOP
NO
• Normal operating.
NO
• IC continues to stop compressor until 1 hour.
• IC indicates Self Diagnosing sign.
YES
• IC continues to stop compressor until 1 hour.
• IC indicates Self Diagnosing sign.
7 After 1 hour.
SYSTEM PROTECT CONTROL CYCLE
333rd time
OPERATE each 7min X 10 times
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NR-B37MV2 / NR-B41MV2
STOP COMPRESSOR