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12.10 Cooling Overload Control
Pipe temperature limitation / restriction.
o Detects the outdoor pipe temperature and carry out restriction / limitation below (Limit the compressor
operation frequency)
o The compressor stops if outdoor pipe temperature exceeds 61°C (PS9, 12NK), 63°C (PS18, 24NK).
o If the compressor stops 4 times in 20 minutes, Timer LED blinks (“F95” indicated: Outdoor high pressure rise
protection)
12.11 Freeze Prevention Control 1
When indoor hear exchanger temperature is lower than 0°C continuously for 6 minutes, compressor will stops
operation.
Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 5°C.
At the same time, indoor fan speed will be higher than during its normal operation.
If indoor heat exchanger is higher than 5°C for 5 minutes, the fan speed will return to its normal operation.
12.12 Freeze Prevention Control 2
Control start conditions
o During Cooling operation and soft dry operation
During Thermo OFF condition, Indoor intake temperature is less than 10°C or
Compressor stops for freeze prevention control
o Either one of the conditions above occurs 5 times in 60 minutes.
Control contents
o Operation stops
o Timer LED blinks and “H99” indicated
12.13 Dew Prevention Control
To prevent dew formation at indoor unit discharge area.
This control will be activated if:
o Outdoor air temperature and indoor pipe temperature judgment by microcontroller is fulfilled.
o When COOL or DRY mode is operated more than 20 minutes or more.
This control stopped if
o Compressor stopped.
o Remote Control setting changed (fan speed/ temperature).
o Outdoor air temperature and indoor intake temperature changed.
Fan speed will be adjusted accordingly in this control.
12.14 Odor Cut Control
To reduce the odor released from the unit.
o Start Condition
AUTO FAN Speed is selected during COOL or DRY operation.
During freeze prevention control and timer preliminary operation, this control is not applicable.
o Control content
Depends on compressor conditions:
1. Compressor OFF → Compressor ON.
The indoor unit fan stops temporarily and then starts to blow at minimum airflow for 30 seconds.
2. Compressor ON → Compressor OFF.
The indoor unit fan stops for 90 seconds and then blows at minimum airflow for 20 seconds.
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