Daikin VRVIII-S, Service Manual

Page: 51 / 266

Operation Mode SiENBE34-703
40 Function
1. Operation Mode
(V3152)
Operation in
stop mode
Indoor unit stop or
thermostat OFF
Indoor unit thermostat ON
Malfunction/Standby
Restart standby
(Compressor stop)
Pressure
equalization
prior to startup
Malfunction/
Standby
Pump-down
residual
operation
Startup control
• Cooling startup
control
• Heating startup
control
Indoor unit thermostat ON
Indoor unit stop or
thermostat OFF
Malfunction/Standby
Indoor unit stop or
thermostat OFF
Normal operation
• Compressor PI control
• Electronic expansion
valve PI control
• Protection control
Cooling or heating
operation
Malfunction/
Standby
Oil return operation
Defrosting operation
Yes
Yes
Yes
No
No
No
Note:
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.
Oil return IN
conditions are met.
Defrost IN
conditions are met.
Operation
mode change