Four-Way Valve Operation Detection Control (Switching Abnormality Between Cooling And Heating); Anti-Freezing Control (Cooling And Dry Operations); Outdoor Air Temperature Control; Indoor Intake Air Temperature Control (Heating Operation) - Panasonic CS-XE9EKE Service Manual

12.8.
Four-way Valve Operation Detection Control (Switching Abnormality between Cool-
ing 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.)
12.9.

Anti-Freezing Control (Cooling and Dry operations)

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 fre-
quency.)
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. ("H99" is memorized, then.)
Limit of Indoor fan speed
• When temperature of indoor heat exchanger is below 6 C (2 C at Dry) continuously for 6 minutes, indoor fan speed will be
increased by 50 rpm.
12.10.

Outdoor Air Temperature Control

In Cooling and Dry operations
1. When outdoor air temperature is below 25 C, the maximum power will be limited up to about 80 - 100% of the rated power.
2. When outdoor air temperature is below 18 C, the maximum power will be limited up to about 50 - 100% of the rated power.
3. When outdoor air temperature is below 11 C, the maximum power will be limited up to about 26 - 81% of the rated power.
12.11.

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.
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