Panasonic CS-E9EKK Service Manual page 28

10.2.4. 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 18.5 A, the compressor will stop operate. Then, operation will restart
afterthree minutes.
2. If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will restart after two
minute.
3. If the set value is 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.
10.2.5. Compressor Overheating Prevention Control
1. If discharge pipe temperature exceeds 100°C, compressor power will be limited.
2. If discharge pipe temperature exceeds 112°C, compressor will be stopped.
3. If the above excess occurs 4 times per 10 minutes, timer LED will be blinking. ("F97" is to be confirmed.)
10.2.6. Outdoor High Pressure Prevention Control (Cooling and Soft Dry Operations)
1. If outdoor heat exchanger temperature exceeds 63°C in cooling or soft dry operation, compressor will be stopped.
2. Timer LED is not blinking. ("F95" is memorized, then.)
10.2.7. 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.
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 operatio
1) Unit stop operation
1) Timer LED blink and "F91" indicated
10.2.8. 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
2. Outdoor total current I Air conditioning: 0.65<=I<1.65.
It is not during deice operation.
3. During cooling and dry operation: indoor suction-indoor piping temperature is below 4°C.
During 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 operatio
1) Unit stop operation
1) Timer LED blink and "F91" indicated
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