Panasonic CS-E9EKK, Service Manual

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10.2.9. Four-way Valve Operation Detection Control (Switching Abnormality between
Cooling and Heating)
In Cooling operation
1. When indoor heat exchanger temperature exceeds 45°C in 4 minutes after compressor starts, compressor will be stopped.
2. If the above excess occurs 4 times per 30 minutes, timer LED is to be blinking. (“F11” is to be confirmed.)
In Heating operation
1. When indoor heat exchanger temperature is below 0°C in 4 minutes after compressor starts, compressor will be stopped.
2. If the above excess occurs 4 times per 30 minutes, timer LED is to be blinking. (“F11” is to be confirmed.)
10.2.10. Freeze Prevention Control (Cooling and Soft Dry Operation)
Limit of Cooling power
1. When temperature of indoor heat exchanger is below 5°C, operating frequency will be decreased.
2. When temperature of indoor heat exchanger exceeds 7°C, operating frequency will be increased. (But, up to programmed
frequency.)
3. When temperature of indoor heat exchanger is below 0°C continuously for 6 minutes, compressor will be stopped.
4. Timer LED is not blinking. (“F99” is memorized, then.)
Limit of Indoor fan speed
• When temperature of indoor heat exchanger is below 6°C (2°C at Soft Dry) continuously for 6 minutes, indoor fan speed will be
increased by 50 rpm.
10.2.11. Outdoor Air Temperature Control
The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the diagram below.
This control will begin one minute after the compressor starts.
10.2.12. Indoor Intake Air Temperature Control (Heating operation)
1. When indoor air temperature is 35°C or more, the maximum power will be limited up to the rated power.
2. When fan speed is set at “Lo” and intake air temperature is below 21°C, the maximum power will be limited up to the rated-
power.