Startup Control In Cooling; Startup Control In Heating - Daikin VRV EMERION REYQ-AATJA Service Manual

SiUS372201EB
4.1

Startup Control in Cooling

4.2

Startup Control in Heating

Frequency
REYQ72AA
(rps)
A 15
B 23
C 28
D 37.3
E 51.4
F 0.9
Reference
Refer to page 156 for Step X.
Part 4 Functions and Control
0 rps
Compressor motor
(M1C) (M2C)
0 pulse
Electronic expansion
valve (main)
(Y1E) (Y2E) (Y3E)
Step 2X/3
Fan motor
(M1F + M2F)
Pc – Pe > 0.17 MPa (24.7 psi)
0 rps
Compressor motor
(M1C) (M2C)
0 pulse
Electronic expansion
valve (main)
(Y1E) (Y2E) (Y3E)
Step 2X/3
Fan motor
(M1F + M2F)
REYQ96/120AA
M1C M2C
26 26
37 37
45 45
60 60
82 82
0.8 0.8
Rotation speed step up
5 sec. interval
E
D
C
B
A
3,000 pulse (fully open)
Ta < 20°C: OFF
(68°F)
Ta ≥ 20°C: StepX/2
+3step/15 sec. (Pc > 2.16 MPa (313 psi))
(68°F) –3step/15 sec. (Pc < 1.77 MPa (257 psi))
Rotation speed step up
5 sec. interval
E
D
C
+F/5 sec.
B
A A
PI control
Initial
opening
Maximum step
Pc – Pe > 0.17 MPa (24.7 psi)
REYQ144/168AA
M1C
26
37
45
60
82
0.8
Startup Control
Pc – Pe > 0.42 MPa (60.9 psi)
OR
DSH > 10°C (18°F)
Pc – Pe > 0.42 MPa (60.9 psi)
&
DSH > 12°C (21.6°F)
REYQ192/216/240AA
M2C M1C
15 15
23 23
28 28
37.3 37.3
51.4 51.4
0.5 0.5
M2C
15
23
28
37.3
51.4
0.5
148