Operation Mode SiAU18-715
76 Function
1. Operation Mode
Startup control
Yes
Yes
Yes
No
No
No
Normal operation
• Compressor PI control
• Protection control
Note:
(Q0587)
In the event indoor unit stops or the thermostat
turns OFF while in oil return operation or
defrosting operation, pump-down residual
operation is performed on completion of the oil
return operation or defrosting operation.
Defrost IN
conditions are met.
Operation mode
change
Oil return IN
conditions are met.
Cooling or heating
operation
Oil return operation
Defrosting operation
Indoor unit stop or
thermostat OFF
Indoor unit stop or
thermostat OFF
Indoor unit stop or
thermostat OFF
Indoor unit thermostat ON
Indoor unit thermostat ON
Malfunction/Standby
Malfunction/Standby
Malfunction/
Standby
Malfunction/
Standby
Pressure
equalization
prior to startup
Restart standby
(Compressor stop)
Pump-down
residual
operation
Operation in
stop mode
•
Electronic expansion
valve PI control
•
Heating startup
control
•
Cooling startup
control