Basic Control; Normal Operation - Daikin SkyAir RZQ-P Series Service Manual

SiUS28-902_B

2. Basic Control

2.1

Normal Operation

 Cooling
Parts Name
Compressor (INV.)
Outdoor unit fan
Four-way valve
Electronic expansion valve
(Main)
Electronic expansion valve
(Subcooling)
Solenoid valve (Hot gas)
Solenoid valve (Receiver
gas discharging)
 Heating
Parts Name
Compressor (INV.)
Outdoor unit fan
Four-way valve
Electronic expansion valve
(Main)
Electronic expansion valve
(Subcooling)
Solenoid valve (Hot gas)
Solenoid valve (Receiver
gas discharging)
Heating operation is not functional at an outdoor air temperature of 82FDB or more.
Function
Electric Symbol
Symbol
RZR18/24/30P RZR36/42P
RZQ18/24/30P RZQ36/42P

M1C M1C
M1F

M1F
M2F
20S1 Y1S Y1S
EV1 Y1E Y1E

EV3 Y3E
SVP Y2S Y2S

SVG Y3S
Electric Symbol
Symbol
RZQ18/24/30P RZQ36/42P RZQ18/24/30P RZQ36/42P

M1C M1C
M1F

M1F
M2F
20S1 Y1S Y1S
EV1 Y1E Y1E

EV3 Y3E
SVP Y2S Y2S

SVG Y3S
Operation
RZR18/24/30P RZR36/42P
RZQ18/24/30P RZQ36/42P
Compressor Compressor
PI control PI control
Cooling fan Cooling fan
control control
OFF OFF
1400 pls 480 pls

PI control
OFF OFF

OFF
Operation
Compressor Compressor
PI control PI control
STEP 8 Step 7 or 8
ON ON
PI control PI control

PI control
OFF OFF

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.
The fan step changes to
STEP 1 with high pressure
> 454 psi.



This valve turns on with
low pressure protection
control.

13