Protection For Compressor Locked - Panasonic NR-BX418XS Service Manual

NR-BX418/NR-BX468/NR-BX41B/NR-BX46B

5.2 Protection for compressor locked

• After starting 2 sec., does IC detect
rpm < 5r/sec.?
1
• After starting from 2-10 sec., does PCB
detect rpm over 120r/sec.?
2
IC orders to stop compressor for 10 min.
3
IC cancels to stop compressor after 10 min.
After restarting, does "Stop compressor"
4
occure 10 times within 2 min.?
IC cancels to stop compressor.
5
Normal operating?
7 Does system protection cycle for 333 times?
8 IC order to stop compressor completely.
SYSTEM PROTECT CONTROL CYCLE
OPERATE each 7min X 10 times COMPRESSOR 1hour STOP
YES
NO
YES
1st time
NO
• Normal operating.
YES • IC continues to stop compressor until 1 hour.
• IC indicates Self Diagnosing sign.
6
After 1 hour.
NO
SYSTEM PROTECT CONTROL CYCLE
333rd time
OPERATE each 7min X 10 times
- 9 -
STOP COMPRESSOR