Heating Operation Prohibition; Overload Protection Control - Daikin VRV RXYMQ-A Series Service Manual

Protection Control
6.5

Heating Operation Prohibition

 When outdoor air temperature becomes high, outdoor unit cannot perform heating because:
 Heating is disabled when outdoor air temperature rises above 27°C.
 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.
64
 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.
 Forced thermostat-OFF indoor units.
 Outdoor fan operates at step 1.
Compressor body temp.
Normal control
t 125 °C
Overload standby
(Error code F3 is output)
SiME332106E
Compressor body temp. d 110 °C
&
Remote controller resets.
Part 4 Functions and Control