5 Normal Operation Control
5.1 Component Control During Normal Operation
Table 3-5.1: Outdoor unit component control during normal operation
Normal Simultaneous
Cooling / Heating
PI control, High pressure protection, Low pressure protection, Discharge temperature
protection, Inverter Over-current protection control, Inverter module temperature
protection control, Wet compression protection control, High pressure ratio protection
control
Electronic expansion valve A
Subcooling control,
Inverter module
temperature control
Subcooling control,
Superheat control, Inverter
module temperature control
Subcooling control,
Superheat control,
Inverter module
temperature control
Electronic expansion valve C
Outdoor unit heat exchanger: Condenser / OFF
Outdoor unit heat exchanger: Evaporator / ON
Solenoid valve (fast
defrosting (in heating) and
unloading (in cooling))
ON with the following conditions:
Ambient temperature ≥5°C when heat exchanger act as evaporator or
when ambient temperature < 25°C when state of heat exchanger act as condenser
Solenoid valve (indoor units
bypass)
ON when the low pressure is too low or the high pressure is too high
Solenoid valve (inverter
compressor A vapor
injection)
Compressor operation, ON
Compressor not operation, OFF
Table 3-5.2: Indoor unit component control during normal operation
Remote controller setting
Remote controller setting
Remote controller setting
Remote controller setting
Electronic
expansion
valve (EEV)
Outlet temperature average control
Condensing temperature average control
500P EEV IDU: 56pls
3000P EEV IDU: 72pls
500P EEV IDU: 56pls
3000P EEV IDU: 72pls
500P EEV IDU: 56pls
3000P EEV IDU: 72pls
500P EEV IDU: 56pls
3000P EEV IDU: 72pls
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