Cooling Overload Control; Freeze Prevention Control; Dew Prevention Control; Protection Control For Heating Operation - Panasonic CS-E12JKKW-1 Service Manual

14.2.2

Cooling Overload Control

•
Pipe temperature limitation / restriction.
Detects the outdoor pipe temperature and carry out restriction / limitation below (Limit the compressor
o
operation frequency)
The compressor stops if outdoor pipe temperature exceeds 141.8°F. (For E12JK-1 only)
o
The compressor stops if outdoor pipe temperature exceeds 145.4°F. (For E18JK-1 only)
o
If the compressor stops 4 times in 20 minutes, Timer LED blinks ("F95" indicated: Outdoor high pressure rise
o
protection)
14.2.3

Freeze Prevention Control 1

•
When indoor heat exchanger temperature is lower than 32°F continuously for 6 minutes, compressor will stops
operation.
•
Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 41°F. (For
E12JK-1 only)
•
Compressor will resume its operation 3 minutes after the indoor heat exchanger is higher than 41°F. (For
E18JK-1 only)
•
At the same time, indoor fan speed will be higher than during its normal operation.
•
If the indoor heat exchanger temperature is higher than 55.4°F for 5 minutes, the fan speed will return to its
normal operation. (For E12JK-1 only)
•
If the indoor heat exchanger temperature is higher than 55.4°F for 5 minutes, the fan speed will return to its
normal operation. (For E18JK-1 only)
14.2.4 Freeze Prevention Control 2 (For E12JK-1)
•
Control start conditions
During Cooling operation and soft dry operation
o
During thermo OFF condition, indoor intake temperature is less than 50°F or
Compressor stops for freeze prevention control
Either one of the conditions above occurs 5 times in 60 minutes.
o
•
Control contents
Operation stops
o
Timer LED blinks and "H99" indicated
o
14.2.5

Dew Prevention Control 1

•
To prevent dew formation at indoor unit discharge area.
•
This control will be activated if:
Outdoor air temperature and Indoor pipe temperature judgment by microcontroller is fulfilled.
o
When Cooling or Dry mode is operated more than 20 minutes or more.
o
• This control stopped if:
Compressor stopped.
o
Remote control setting changed (fan speed / temperature).
o
Outdoor air temperature and indoor intake temperature changed.
o
•
Fan speed, angle of louver (vertical airflow angle) will be adjusted accordingly in this control.
1. Fan speed will be increased slowly when control is activated until predetermine value.
• Compressor frequency will be regulated accordingly.
14.2.6

Protection Control For Heating Operation

14.2.6.1 Intake Air Temperature Control
Compressor will operate at limited freq., if indoor intake air temperature is 86°F or above.
14.2.6.2 Outdoor Air Temperature Control
•
The Max current value is regulated when the outdoor air temperature rise above 60.8°F in order to avoid
compressor overloading. (For E12JK-1 only)
•
The Max current value is regulated when the outdoor air temperature rise above 57.2°F in order to avoid
compressor overloading. (For E18JK-1 only)
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