Panasonic CS-G125KE CU-G125KE, Service Manual, Page: 44 / 114

g. Minimum Frequency Operation Protection
•
When the compressor operates at less than 31 Hz for 40 minutes, the operating frequency will increase to 31 Hz for 2
minutes.
h. Low Frequency Operation Protection
Indoor intake air temp. (°C) 30°C or < 15°C 28°C or < 14°C
Outdoor air temp. (°C) 38°C or < 16°C 24°C or < 4°C
Indoor heat exchanger temp. (°C) < 30 °C > 0°C
Operation Cooling/Soft Dry Heating
•
When the above conditions occur, the compressor will operate at minimum frequency as below:-
CU-G95KE CU-G125KE
Cooling/Soft Dry Min 31Hz Min 31Hz
Heating Min 33Hz Min 36Hz
i. Low Power Supply Voltage Protection
•
When the DC voltage supplied to IPM (Power transistor) is reduced to 169 ± 5V (CS-G95KE) or 160 ± 5V (CS-G125KE) the
compressor stops and restarts after 3 minutes.
•
If within 30 seconds after restarting of compressor, the DC voltage is reduced to 169 ± 5V (CS-G95KE) or 160 ± 5V (CS-
G125KE) again, the compressor will stop for 1 minute.
If this condition repeats for 7 times, all indoor and outdoor relays will be turned off; TIMER LED will blink and F99 is
displayed.
j. High Power Supply Voltage Protection
•
When the voltage supply (AC) exceeds 295 ± 15V (T
0
), the air conditioner stops and restarts automatically when the voltage
supply (AC) is below (T
0
- 5)V. However, waiting for 3 minutes is necessary for re-operation.
44
S-G95KE CU-G95KE / CS-G125KE CU-G125KE