Basic Control; Normal Operation - Daikin SkyAir RZR-TA Series Service Manual

SiUS281811EA

2. Basic Control

2.1

Normal Operation

Cooling Operation
Compressor
Outdoor fan
Main electronic
expansion valve
Subcooling
electronic expansion
valve
Four way valve
Hot gas bypass
valve
Heating Operation
Compressor
Outdoor fan
Main electronic
expansion valve
Subcooling
electronic expansion
Four way valve
Hot gas bypass
valve
∗ Heating operation is not functional at an outdoor air temperature of 24°CDB (75.2°FDB) or more.
Part 4 Functions and Control
Electric Symbol
Outdoor unit
18/24
actuator
class
M1C
M1F
Y1E
—
Y1S
Y2S
Electric Symbol
Outdoor unit
18/24
actuator
class
M1C
M1F
Y1E
—
Y1S
Y2S
Operation
30/36/42/48
class
M1C Compressor
PI control
M1F Cooling fan control
M2F
Y1E 480 pulse
Y3E PI control
Y1S OFF
— OFF
Operation
30/36/42/48
class
M1C Compressor
PI control
M1F Step 7 or 8
M2F
Y1E PI control
Y3E PI control
Y1S ON
— OFF

Basic Control

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.
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.
105