Panasonic CS-G93KE Service Manual page 39

Operation Details
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)
Outdoor air temp. (°C)
Indoor heat exchanger temp. (°C)
Operation
• When the above conditions occur, the compressor will operate at minimum frequency as below:-
Cooling / Soft Dry
Heating
i. Low Power Supply Voltage Protection
When the DC voltage supplied to IPM (Power transistor) is reduced to 169 ± 5V (CS-G93KE) or 160 ± 5V
•
(CS-G123KE) 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-G93KE) or
•
160 ± 5V (CS-G123KE) 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.
DC Voltage
Supplied to IPM
169 or 160
j. High Power Supply Voltage Protection
When the voltage supply (AC) exceeds 295 ± 15 V (T
•
when the voltage supply (AC) is below (T
Comp. Operating
Frequency
31Hz
40 min
≥ 30°C or < 15°C
≥ 38°C or < 16°C
< 30°C
Cooling/Soft Dry
CU-G93KE
Min 31Hz
Min 33Hz
(V)
Comp OFF
3 min 30 sec
30 sec
- 5)V. However, waiting for 3 minutes is necessary for re-operation.
0
2 min
≥ 28°C or < 14°C
≥ 24°C or < 4°C
> 0°C
Heating
CU-G123KE
Min 31Hz
Min 36Hz
Comp
OFF
1 min 30 sec 30 sec
1 min 30 sec 30 sec
7 times
), the air conditioner stops and restarts automatically
0
– 44 –
CS-G93KE
TIMER LED
Blinks
F99 is
displayed