Basic Control; Normal Operation - Daikin VRV II RXYQ5MY1B Service Manual

Basic Control

2. Basic Control

2.1

Normal Operation

Cooling Operation
Actuator
Compressor
Outdoor unit fan
Four way valve
Main motorized valve (EV1)
Subcooling motorized valve (EV2)
Hot gas bypass valve (SVP)
Oil equalization valve (SVO)
Receiver gas discharging valve (SVG)
Non-operating unit liquid pipe stop valve
(SVSL)
Heating Operation
Actuator
Compressor
Outdoor unit fan
Four way valve
Main motorized valve (EV1)
Subcooling motorized valve (EV2)
Hot gas bypass valve (SVP)
Oil equalization valve (SVO)
Receiver gas discharging valve (SVG)
Non-operating unit liquid pipe stop valve
(SVSL)
HHeating operation is not functional at an outdoor air temperature of 24°C or more.
76
Operation
Compressor PI control
Cooling fan control
OFF
1400 pls
PI control
OFF
ON
OFF
ON
Operation
Compressor PI control
STEP8 or 9
ON
PI control
0 pls
OFF
ON
OFF
ON
Remarks
Used for high pressure protection control, low
pressure protection control, discharge pipe
temperature protection control, and compressor
operating frequency upper limit control with inverter
protection control.
⎯
⎯
⎯
⎯
This valve turns on with low pressure protection
control.
In the case of multi-outdoor-unit system, this valve
repeats ON/OFF operation at regular intervals of
time.
⎯
⎯
Remarks
Used for high pressure protection control, low
pressure protection control, discharge pipe
temperature protection control, and compressor
operating frequency upper limit control with inverter
protection control.
⎯
⎯
⎯
⎯
This valve turns on with low pressure protection
control.
In the case of multi-outdoor-unit system, this valve
repeats ON/OFF operation at regular intervals of
time.
⎯
⎯
SiE39-404
Function