Compressor Tank Temperature Rise Protection Control - Panasonic CS-E9GFEW Service Manual

9.15.1.4. IPM (Power transistor) Prevention Control
A. Overheating Prevention Control
1. When the IPM temperature rises to 100 C, compressor operation will stop immediately.
2. Compressor operation restarts after three minutes the temperature decreases to 95 C.
B. DC Peak Current Control
1. When electric current to IPM exceeds set value of 22.33 A, the compressor will stop operate. Then, operation will restart
after three minutes.
2. If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will restart after two
minutes.
3. If the set value exceeded again within 30 seconds after the compressor starts, the operation will restart after one minute. If
this condition repeats continuously for seven times, all indoor and outdoor relays will be cut off.
9.15.1.5. Compressor Overheating Prevention Control
Instructed frequency for compressor operation will be regulated by compressor discharge temperature. The changes of frequency
are as below figure.
9.15.1.6. Low Pressure Prevention Control (Gas Leakage Detection)
a. Control start conditions
Control will perform when (1) - (3) condition continues operation for 5 minute and (4) is fulfill.
1. During cooling and dry operation: Frequency more than normal Fcmax.
During heating operation: Frequency more than normal Fh
2. Outdoor total current I cooling: Ib I<Ia
Heating: Ib I<Ic
Ic = Ia = 1.65 A
Ib = 0.65 A
3. It is not during deice operation.
During heating operation: Frequency more than normal Fh
4. During cooling and dry operation: indoor suction-indoor piping temperature is below 4 C.
During of heating operation: Indoor piping temperature-indoor suction is under 5 C.
Control contents:
• compressor stops (restart after 3 minutes)
• if happen 2 times within (20 minutes), perform the following operation
1) Unit stop operation
2) 7 segment "F91" indicated

9.15.1.7. Compressor Tank Temperature Rise Protection Control

a. Control start conditions
Control will perform when (1) - (3) condition continues operation for 5 minute and (4) is fulfill.
1. During cooling and dry operation: Frequency more than normal Fc.
Air-temperature: Indoor and outdoor 30±5 degrees C
Remote control Hi; 16 degrees C
During Heating operation: Frequency more than Fh
Air temperature: Indoor and outdoor 20±2 degrees C
Remote control Hi; 30 degrees C
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