Daikin REYQ8-48PY1B, Service Manual

Page: 131 / 477

SiBE37-701_B Special Control
Function 120
3.1.2 Startup Control in Heating Operation
Actuator Symbol
Elect.
symbol
Control
before
startup
Startup control
REYQ REMQ
STEP 1 STEP 2
Compressor 1
—
M1C M1C
0 Hz 52 Hz+OFF+OFF
52Hz+OFF+OFF+2 STEP / 20
sec.
(Until it reaches
Pc-Pe>0.39 MPa)
Compressor 2 M2C M2C
Compressor 3 — M3C
Outdoor unit fan 1
—
M1F M1F
STEP 4
20SA=ON: STEP 7
20SA=OFF
+1step/15 sec. (When
Pc_max>2.16 MPa)
-1step/15 sec. (When
Pc_max<1.77 MPa) 20SA=ON: STEP 7
20SA=OFF
+1step/15 sec. (When
Pc_max>2.16 MPa)
-1step/15 sec. (When
Pc_max<1.77 MPa)
Outdoor unit fan 2 M2F M2F
Electronic expansion
valve (Main)
EVM
Y1E
Y3E
Y1E 0 pls
20SA=ON: SH Control
20SA=OFF: 1375 pls 20SA=ON: SH Control
20SA=OFF: 1375 pls
Electronic expansion
valve (Subcooling)
EVT
Y2E
Y5E
Y3E 0 pls 0 pls 0 pls
Electronic expansion
valve (Refrigerant
charge)
EVJ Y4E Y2E 80 pls 80 pls 80 pls
Four way valve (Heat
exchanger switch)
20SA
Y2S
Y9S
Y3S
When
outdoor
heat
exchanger
is
evaporator:
ON
When
outdoor
heat
exchanger
is
condenser:
OFF
When outdoor heat
exchanger is evaporator: ON
When outdoor heat
exchanger is condenser:
OFF When outdoor heat
exchanger is evaporator: ON
When outdoor heat
exchanger is condenser:
OFF
Four way valve (Dual
pressure gas pipe switch)
20SB Y8S Y2S OFF OFF OFF
Solenoid valve (Main
bypass)
SVE
Y5S
Y10S
Y6S OFF OFF OFF
Solenoid valve (Hot gas) SVP Y4S Y5S OFF OFF OFF
Solenoid valve
(Refrigerant regulator
liquid pipe)
SVL Y3S Y4S OFF OFF OFF
Solenoid valve
(Refrigerant regulator gas
vent pipe)
SVG Y1S Y1S OFF OFF OFF
Solenoid valve
(Refrigerant regulator
discharge pipe)
SVO Y7S Y7S OFF OFF OFF
Solenoid valve
(Refrigerant regulator
discharge pipe)
SVT Y6S Y8S OFF OFF OFF
Ending conditions
A lapse of
60 sec.
A lapse of 15 sec.
•
A lapse of 90 sec.
•
Pc - Pe>0.39 MPa
OR