Panasonic CU-3Z52TBE - Heating Protection Functions

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14.5 Cooling overload control (Cool)
 This control detect outdoor pipe temperature and perform the compressor frequency restriction during cooling
operation.
Comp stop
Comp freq
restricted
60°C
57°C
Comp freq
free
64°C
OD Pipe
tem
p
14.6 Heating overload control (Heat)
 This control detect indoor pipe temperature and perform the compressor frequency restriction during heating
operation.
Comp stop
Comp freq
restricted
53°C
Comp freq
free
60°C
ID Pipe
tem
p
48°C
Comp freq
maintain
 This control detect outdoor ambient temperature and perform the fan speed adjustment during heating operation.
RPM controlled
12°C
10°C
RPM free
OD temp
14.7 Extreme Low Temperature Compressor low pressure protection control
(Heat)
 This control is to prevent low pressure drops too low during extremely low outdoor ambient temperature to
improve the compressor reliability.
 During heating operation, when outdoor ambient temperature is in Zone 1, this control will be activated.
Compressor frequency restriction will be based on outdoor piping temperature.
Zone 0
-5°C
-3°C
Zone 1
OD temp
Comp freq
free
Comp freq
restricted
Comp freq
stop
-25°C
-23°C
-28°C
-26°C
OD pipe
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