Si33-105 Outline of Control (Outdoor Unit) < Symbols using in this manual >
Function R407C PLUS Series Heat Recovery System 89
Equalizing
control IN
Equalizing
control OUT
Step No.
INV
SVP
Outdoor EV
Outdoor fan
20S1
20S2
20S3
SVS
(Aux. compressor)
Indoor EV
(Heating unit)
Indoor fan
(Heating unit)
Indoor EV
(Cooling thermostat ON unit)
Indoor EV
(Cooling thermostat OFF unit)
(Cooling stop unit)
(Fan mode unit)
Indoor fan
(Cooling unit)
(Fan mode unit)
BS unit
solenoid valve
Normal control 546321
41Hz
H
1
According to protection control
According to operation mode
Full operation normally
H
2
Provides fan control for high pressure keeping.
H
5
OFF
OFF
0 pls instruction
Fan = OFF instruction
Instruction cancel with
H
4
Instruction cancel with
H
3
Instruction cancel with
H
3
SH control
H
7
SC control
H
6
200pls instruction
200pls instruction
Cooling thermostat OFF, fan unit
instruction cancel
No instruction
Changeover
Changeover
Changeover
According to operation mode
According to operation mode
According to operation mode
When Pc>2.3MPa,
compressor turns on.
All solenoid
valves = OFF
According to operation mode
OR
40s 30s 10s 10s 30s
2min
Pe<0.03MPa
BS unit solenoid valve changeover (Max. 16 sec)
(V2589)
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