Panasonic CS-A12KKD-2, Service Manual

Page: 89 / 136

89
13.24 Overload Protection Control
•
Outdoor Fan Control
o
If the temperature of the Outdoor Heat Exchanger less than -3°C, Outdoor Fan is ON. The Outdoor Fan stop,
when Outdoor Heat Exchanger temperature is Tb or more according to Outdoor Air Temperature region as
table below:
The Outdoor Fan restarts when the indoor heat exchanger temperature falls to 49°C.
Outdoor Air
Temperature
< 10°C 10°C ~ < 15°C 5°C ~ < 20°C 20°C ~ < 25°C 25°C
Tb 5°C 3°C 1.5°C 0.5°C 0.5°C
Outdoor Fan
OFF
During starting of Heating mode and after deice, Outdoor Fan ON for 90 sec. (Hi).
•
Compressor High Pressure Control
o
If the indoor heat exchanger becomes 68°C or more, the compressor will stop and restart automatically.
o
Time Delay Safety Control is activated before the compressor restart.
13.25 4-Way Valve Control
•
4-way valve always on during Heating operation. (except deicing operation)
•
When the unit is switched off by remote control during Heating operation, the 4-way valve stay at Heating
position for 5 minutes.
•
This is to prevent the refrigerant flow process sound for being occur.
13.26 Hot Start Control
•
Hot Start Control is to prevent cool air discharge into the room when heating operation start.
•
When Heating operation starts, Indoor fan will not start until the indoor heat exchanger reaches 30°C as diagram
shown.
•
Hot start is completed when indoor heat exchanger rises to 42°C or operation over 4 minutes.