Function General; Operation Mode - Daikin VRV II-Q RQYQ8-48PY1B Service Manual

SiBE341027

1. Function General

1.1

Operation Mode

2-1. Stop
Indoor unit
stop or
thermostat
OFF
Pressure
equalization prior
to startup
2.3. Startup control
(1) Startup control in cooling
(2) Startup control in heating
2.4. Normal Operation
(1) List of Functions in Normal
Operation
(2) Compressor PI Control
(4) Compressor Step Control
(5) Electronic Expansion
Valve PI Control
(6) Step Control of
Outdoor Unit Fans
2.5. Protection Control
(1) High Pressure
Protection Control
(2) Low Pressure
Protection Control
(3) Discharge Pipe
Temperature
Protection Control
(4) Inverter Protection
Control
(5) STD Compressor
Overload Control
Function
operation
Thermostat ON
(If test run has not been completed, the error code "U3" is displayed
and the unit will not operation. However this does not apply to test
run in service mode, refrigerant charging, and pump down.)
Retry
Indoor unit
stop or
thermostat
OFF
(3) Outdoor Unit
Rotation
In Operation
Oil
return starting
conditions are
met
No
Defrost starting
conditions are
met
No
Cooling / Heating
change
No
Indoor unit thermostat ON
Indoor unit
stop or
thermostat
OFF
Retry
2.6. Special Control
Yes
Yes
Yes

Function General

2.2. Standby
(1)
Restart Standby
(2)
Crankcase
Heater Control
Retry
Pump down
Residual
Operation
Indoor unit
stop or
thermostat
OFF
(1) Oil Return Operation
(2) Defrost Operation
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