Panasonic CS-E9GFEW Service Manual page 48

2. Outdoor total current I Air conditioning: 0.65<=I<1.65.
Heating: 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 operation
1) Unit stop operation
2) 7 segment "F91" indicated
9.15.1.8. Low Frequency Protection Control 1
When the compressor operate at frequency lower than 25 Hz continued for 20 minutes, the operation frequency will be increased
to 20 Hz for two minutes.
9.15.1.9. Low Frequency Protection Control 2
When all the below conditions occur, minimum value (Freq. MIN) for the frequency instructed to compressor will change to 30 Hz
for cooling mode operation and 20 Hz for heating mode operation.
Temperature, T, for:
Indoor intake air ( C)
Outdoor air ( C)
Indoor heat exchanger ( C)
9.15.1.10. DC Current Protection Control (E9FGE, E12GFE)
Purpose
In order to control DC current rise in a compressor low frequency region, load is detected with from indoor/outdoor heat
exchanger temperature, Hz control is performed.
Control contents
1. During cooling and dry except test mode
2. During heating compressor operation, except test mode.
Cooling/Dry
T < 15 or T 30
T < 16 or T 38
T < 30
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Heating
—
T < 4 or T 24
T 0