Panasonic CS-PS9NKH, Service Manual

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12.10 Cooling Overload Control
š
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
š
When indoor hear exchanger temperature is lower than 0°C continuously for 6 minutes, compressor will stops
operation.
š
Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 5°C.
š
At the same time, indoor fan speed will be higher than during its normal operation.
š
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
š
Control start conditions
o
During Cooling operation and soft dry operation
ƒ
During Thermo OFF condition, Indoor intake temperature is less than 10°C or
ƒ Compressor stops for freeze prevention control
o
Either one of the conditions above occurs 5 times in 60 minutes.
š
Control contents
o
Operation stops
o
Timer LED blinks and “H99” indicated
12.13 Dew Prevention Control
š
To prevent dew formation at indoor unit discharge area.
š
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.
š
This control stopped if
o
Compressor stopped.
o
Remote Control setting changed (fan speed/ temperature).
o
Outdoor air temperature and indoor intake temperature changed.
š
Fan speed will be adjusted accordingly in this control.
12.14 Odor Cut Control
š
To reduce the odor released from the unit.
o
Start Condition
ƒ AUTO FAN Speed is selected during COOL or DRY operation.
ƒ During freeze prevention control and timer preliminary operation, this control is not applicable.
o
Control content
ƒ 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.