Outdoor Fan Motor Control; Hot Start Control; Cold Draft Prevention Control - Panasonic CS-A9MKD Service Manual

13.11 Outdoor Fan Motor Control

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When compressor stops (reaches room temperature), outdoor fan will operate for 30 seconds (forced operation).
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This is to release the heat and to obtain the lowest pressure as fast as possible.

13.12 Hot Start Control

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Hot start control is to prevent cool air discharge into room when heating operating starts.
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Hot start is executed after heating operation starts and deice operation is completed.
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Indoor fan control during hot start is shown below:
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When indoor pipe temperature over 34°C or maximum 240 seconds, hot start is completed.
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During hot start and for 30 seconds after hot start completed, intake thermostat is ignored and no Thermo OFF.

13.13 Cold Draft Prevention Control

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This operation is to prevent the Cold Draft during Heating mode operation.
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The operation will start when compressor OFF (Thermo OFF) during Heating operation.
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For the first 30 sec. from compressor OFF (Thermo OFF), Indoor fan speed will operate accordingly to the Indoor
heat exchanger temperature as shown below:
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After 30 sec. from compressor OFF (thermo OFF), Indoor fan will run at SSLo speed only.
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Anti Cold Draft Control will stop when:
Intake temperature < set temperature. (Time Delay Safety Control 4 minutes waiting is valid)
o
30 Minutes Time Save Control activates.
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Indoor Pipe Temperature
≤ 30°C
30°C < t ≤ 34°C
t ≥ 34°C
Indoor Fan
OFF
SLo
Lo-
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