Daikin REYQ-AATJA, Service Manual, Page: 135 / 495

SiUS372201EA Startup Control
Part 4 Functions and Control 128
Reference
4.1 Startup Control in Cooling
4.2 Startup Control in Heating
Refer to page 136 for Step X.
0 rps
0 pulse
3,000 pulse (fully open)
Pc – Pe > 0.42 MPa (60.9 psi)
DSH > 10°C (18°F)
OR
Ta < 20°C: OFF
(68°F)
Ta
≥
20°C: StepX/2
(68°F)
Rotation speed step up
5 sec. interval
+3step/15 sec. (Pc > 2.16 MPa (313 psi))
–3step/15 sec. (Pc < 1.77 MPa (257 psi))
Compressor motor
(M1C) (M2C)
Electronic expansion
valve (main)
(Y1E) (Y2E) (Y3E)
Fan motor
(M1F + M2F)
Pc – Pe > 0.17 MPa (24.7 psi)
A
B
C
D
E
Step 2X/3
0 rps
+ F /5 sec.
A
B
C
D
E
0 pulse
Maximum step
PI control
Compressor motor
(M1C) (M2C)
Electronic expansion
valve (main)
(Y1E) (Y2E) (Y3E)
Fan motor
(M1F + M2F)
Rotation speed step up
5 sec. interval
Initial
opening
Pc – Pe > 0.42 MPa (60.9 psi)
DSH > 12°C (21.6°F)
Pc – Pe > 0.17 MPa (24.7 psi)
&
Step 2X/3
A
Frequency
(rps)
REYQ72AA
REYQ96/120AA REYQ144/168AA REYQ192/216/240AA
M1C M2C M1C M2C M1C M2C
A 15 26 26 26 15 15 15
B 23 37 37 37 23 23 23
C 28 45 45 45 28 28 28
D 37.3 60 60 60 37.3 37.3 37.3
E 51.4 82 82 82 51.4 51.4 51.4
F 0.9 0.8 0.8 0.8 0.5 0.5 0.5