Protection Control
SiME332106E
64
Part 4 Functions and Control
6.5 Heating Operation Prohibition
When outdoor air temperature becomes high, outdoor unit cannot perform heating because:
Low pressure sensor can give pressure value above upper limit of sensor: error
JC
.
Mechanical internal load on compressor increases.
Low compression ratio can result in insufficient compressor internal oil lubrication.
Heating is disabled when outdoor air temperature rises above 27°C.
Forced thermostat-OFF indoor units.
Outdoor fan operates at step 1.
Heating returns available when outdoor air temperature drops below 25°C.
6.6 Overload Protection Control
Prevent ignition due to abnormal heating of the compressor when it becomes damaged or
abnormal operation.
Normal control
Overload standby
(Error code
F3
is output)
Compressor body temp.
125
°C
&
Compressor body temp.
110
°C
Remote controller resets.
