Daikin SkyAir RZQ200 · 250C7Y1B Service Manual page 69

Outdoor Unit
2.3.3 Cooling 3 (Pump Down Residual Operation / Oil Return Operation)
M1C
Compressor
[INV]
Outdoor unit fan M1F
Indoor unit fan MF
Electronic
expansion valve Y1E
(main)
Electronic
expansion valve Y2E
(subcooling)
Four way ralve Y3S
Solenoid valve for
venting receiver Y2S
gas
Solenoid valve for
Y1S
hot gas
Remarks
2.3.4 Heating 1 (Control while Compressor is Stopped)
M1C
Compressor
[INV]
Outdoor unit fan M1F
Indoor unit fan MF
Electronic
expansion valve Y1E
(main)
Electronic
expansion valve Y2E
(subcooling)
Four way ralve Y3S
Solenoid valve for
venting receiver Y2S
gas
Solenoid valve for
Y1S
hot gas
Remarks
58
"Cooling operation pump down residual operation"
Basic operation
"High pressure protection
control"
"Discharge pipe
temperature protection
124Hz control"
"Inverter current
protection control"
"Control by inverter fin
temperature"
"Pump down residual
operation"
"Control before the
compressor stops (indoor
unit fan)"
"EV fixed open degree 2"
0
OFF
ON
"Movement of constant-
speed compressor"
"Restart standby" Thermostat OFF standby
0Hz (*1) 0Hz (*1)
According to "Restart
0 Step
standby"
No instruction No instruction
0 0
0 0
ON (*2) ON (*2)
OFF OFF
ON OFF
After "Restart standby,"
between outdoor unit in
5 minutes after the
operation = ON and
compressor stops
outdoor unit thermostat
ON = OFF
*1: In the instruction on inverter compressor frequency, 0 Hz indicates K2 (magnetic contactor for inverter
compressor) is ON.
*2: While the compressor is stopped when cooling is switched to heating, the previous state is maintained.
*3: For the first operation after turning ON the power, it is OFF.
Compressor in operation
Protection control Basic operation
Fmin Cool oil return
= Oil return
implementation step
7 steps
"Oil recovery operation
control"
"Electronic expansion
valve control"
"Subcooling electronic
expansion valve control"
OFF
OFF
OFF
While compressor is stopped
In normal operation
OFF (*1)
0 Step
No instruction
0
0
ON (*2)(*3)
OFF
OFF
Outdoor unit in operation
= OFF
SiBE26-701
"Oil return operation control"
Protection control
"High pressure protection
control"
"Discharge pipe
temperature protection
control"
"Inverter current
protection control"
"Control by inverter fin
temperature"
"Cooling operation low
outdoor air control"
"Outdoor unit fan control"
No instruction
Low pressure protection
control
"Pressure equalization
control before startup"
0Hz (*1)
"Pressure equalization
control before startup"
"Pressure equalization
control before startup"
(Indoor unit fan)
0
0
ON (*2)(*3)
OFF
ON
10 seconds at the earliest
Up to 1 minute
Function and Operation