Outline of Control (Outdoor Unit) < Symbols using in this manual > Si33-105
58 Function R407C PLUS Series Heat Recovery System
3.3.3 Startup Control
Cooling Startup
Control
Fixes the frequency at a low level for a certain period of time during compressor startup to
prevent liquid return.
[Startup control in cooling operation]
Startup control ends
when
H
1 is met
Opens outdoor
unit EV when
H
2
is met
41Hz
H
3
H
4
H
6
H
7
H
5
52Hz
20 sec delay
30 sec
1 min
2000
200 (in retry: 1200,
second time: 2000)
SH control
Normal full operation
Provides fan control to maintain
high pressure in cooling operation.
Equalization prior to startup
Startup control
Thermostat ON Inverter charging
H
1
Startup control ending conditions
H
2
Outdoor unit EV full-open conditions
H
3
Operates at 52 Hz after operating
at 41 Hz for 1 minute.
(until PI control is activated in
H
1)
INV
SVP
Outdoor EV3(2)
(on Sub unit)
Indoor EV
(Unit with
thermostat ON)
Outdoor fan
Indoor fan
Maximum 15 minutes (including 5 minutes of restart standby in stop mode)
When HP - LP < 0.196MPa, compressor turns on.
(V0808)
OR
&
Tc>Ta+10
Elapsed time of 10 minutes
Tcg>55deg
When condition
H
1 is met
OR
DSHi>30
Th7 – Te>10
Elapsed time of 15 minutes
LP<0.098MPa
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