Defrost Operation - Daikin RXYQ96PYDN Service Manual

Special Control
Cooling indoor unit actuator
Fan
Motorized valve
Heating indoor unit actuator
Fan
Motorized valve
7.4

Defrost Operation

7.4.1 Single System
Defrosting outdoor unit actuator Symbol
Compressor 1
Compressor 2
Outdoor unit fan
Four-way valve (heat
exchanging)
Four-way valve (switching
between high- and low-
pressure gas pipes)
Electronic expansion valve
(main)
Electronic expansion valve
(subcool)
Electronic expansion valve
(refrigerant charge)
Solenoid valve (main)
Solenoid valve (hot gas)
Solenoid valve (liquid pipe of
refrigerant regulator)
Solenoid valve (gas purging
pipe of refrigerant regulator)
Solenoid valve (drain pipe of
refrigerant regulator)
56
Thermo ON unit
Unit not in operation
Thermo OFF unit
Thermo ON unit
Unit not in operation
Thermo OFF unit
Thermo ON unit
Unit not in operation
Thermo OFF unit
Thermo ON unit
Unit not in operation
Thermo OFF unit
Electrical symbol
For any model
RXYQ
other than that
144PTJU
shown on the left
M1C
—
M2C
M1F
—
M2F
Y2S
20SA
Y9S
20SB Y8S
Y1E
EVM
Y3E
Y2E
EVT
Y5E
EVJ Y4E
Y5S
SVE
Y10S
SVP Y4S
SVL Y3S
SVG Y1S
SVO Y7S
Normal opening degree for forced thermostat ON
Normal opening degree for forced thermostat ON
Defrosting operation
M1C
232Hz+ON
M2C
FAN=OFF
M1F
Applicable
unit Tfin
or
>167˚F
Applicable
unit Pc>23k
—
FAN=7Y
Y3S OFF
Y2S ON
Y1E 1375pls
Y3E SH control
Y2E 80pls
Y6S ON
Y5S OFF
Y4S 0pls
Y1S 0pls
Y7S 0pls
SiUS34-801A_b
Oil return operation
Remote controller setting
OFF
Remote controller setting
Normal opening degree
192pls
Oil return operation
Remote controller setting
OFF
LL
Normal opening degree
224 pls
Operation after defrosting
232Hz+ON
Applicable
unit Tfin
&
Step 8
<165.2˚F
Applicable
unit Pc<18k
ON
OFF
0pls— >200~400pls
0pls
80pls
OFF
OFF
0pls
0pls
0pls
VRVIII R-410A Heat Pump 60Hz