Protection For Compressor Locked - Panasonic NR-BW414MN Service Manual

4.2 Protection for compressor locked

• After starting 2 sec., does IC detect rpm <5r/sec>?
• After starting from 2 ~ 10 sec., does PCB detect
1
rpm over 120r/sec?
2
IC orders to stop compressor for 10 min.
IC cancels to stop compressor after 10 min.
3
After restarting, does "Stop compressor" occure 10
4
times within 2 min?
IC cancels to stop compressor. Normal operating.
5
7 Does system protection cycle for 333 times?
8 IC orders to stop compressor completely.
SYSTEM PROTECT CONTROL CYCLE
OPERATE each 7min X 10 times COMPRESSOR 1hour STOP
YES
NO
YES
st
1 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
rd
333 time
OPERATE each 7min X 10 times
- 8 -
NR-BW414 / NR-BW464
STOP COMPRESSOR