Low Pressure Prevention Control (Gas Leakage Detection); Compressor Tank Temperature Rise Protection Control; Low Frequency Protection Control 1; Low Frequency Protection Control 2 - Panasonic CS-PS9JKT Service Manual

12.5

Low Pressure Prevention Control (Gas Leakage Detection)

•
Control start conditions
For 5 minutes, the compressor continuously operates and outdoor total current is between 0.65A and 1.65A.
o
During Cooling and Soft Dry operation:
o
Indoor suction temperature – indoor piping temperature is below 4°C
•
Control contents
Compressor stops (and restart after 3 minutes).
o
If the conditions above happened 2 times within 20 minutes, the unit will:
o
Stop operation
Timer LED blinks and "F91" indicated.
12.6

Compressor Tank Temperature Rise Protection Control

•
Control start conditions
For 5 minutes, the compressor continuously operates and outdoor total current is between 0.65A and 1.65A.
o
During Cooling and Soft Dry operation:
o
Indoor suction temperature -indoor piping temperature is below 4°C.
Indoor temperature and outdoor temperature is 30±5°C.
Remote Control setting 16°C and Hi Fan Speed.
•
Control contents
Compressor stops (and restart after 3 minutes)
o
If the conditions above happened 2 times within 20 minutes, the unit will:
o
Stop operation
Timer LED blinks and "F91" indicated.
12.7

Low Frequency Protection Control 1

•
When the compressor operates at frequency lower than 24Hz continued for 20 minutes, the operation frequency
will be changed to 23Hz for 2 minutes.
12.8

Low Frequency Protection Control 2

•
When all below conditions comply, the compressor frequency will changed to lower frequency.
12.9

Outdoor Air Temperature Control

•
The compressor operating frequency is regulated in accordance to the outdoor air temperature as shown in the
diagram below.
•
This control will begin 1 minute after the compressor starts.
•
Compressor frequency will adjust based on outdoor air temperature.
Temperature, T, for:
Indoor intake air (°C)
Outdoor air (°C)
Indoor heat exchanger (°C)
Free
38°C
Limited Frequency
Outdoor air temperature
36
Cooling / Soft Dry
T < 15 or T ≥ 30
T < 16 or T ≥ 38
T < 30
37°C