Cooling Overload Control (Cool); Heating Overload Control (Heat) - Panasonic CU-3E19RBU-5 Service Manual

13.5 Cooling overload control (Cool)


This control detect outdoor pipe temperature and perform the compressor frequency restriction during cooling
operation.

The compressor will be stopped to avoid compressor overloading.

13.6 Heating overload control (Heat)


This control detect indoor pipe temperature and perform the compressor frequency restriction during heating
operation.

This control detect outdoor ambient temperature and perform the fan speed adjustment during heating operation.

The compressor will be stopped to avoid compressor overloading.
Comp stop
147.2°F (64°C)
Comp freq
restricted
140°F (60°C)
Comp freq
free
OD Pipe
temp
COMP. ON
14.0°F (-10.0°C)
COMP. OFF
Outdoor
Air Temperature
140.0°F (60°C)
127.4°F (53°C)
118.4°F (48°C)
ID Pipe
temp
RPM controlled
53.6°F (12°C)
RPM free
OD temp
COMP. ON
-5.8°F (-21°C)
COMP. OFF
Outdoor
Air Temperature
55
134.6°F (57°C)
10.4°F (-12.0°C)
Comp stop
Comp freq
restricted
Comp freq
maintain
Comp freq
free
50.0°F (10°C)
-7.6°F (-22°C)