1
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3WAY SYSTEM
Control Functions
1
3. Compressor Control
3-7. Protection Control
3-7-1. Compressor discharge temperature protection
Discharge temp.
The compressor capacity is controlled according to the table below.
3-7-2. Abnormal Low Pressure Protection
The compressor capacity is controlled according to the table below.
3-7-3. Over-current Protection of Compressor
Current limitation of compressor is shown in the table below. This limitation is to protect the compressor, so that
the current of the power cable connected with the compressor is limited.
*
Inverter compressor
For the inverter compressor, this is the secondary current from HIC board.
*Discharge temperature that is used for this control is the highest temperature among all compressors.
106 deg
104 deg
103 deg
101 deg
Capacity goes down 2.0 hp
Capacity goes down 1.0 hp
Capacity goes down 0.5 hp
Compressor capacity cannot increase
Compressor capacity can increase
Compressor
capacity
decreases
105 deg
Stop If this temperature is detected at regular intervals, alarm appears.
Low pressure
0.25 MPa
0.17 MPa
Capacity goes up slowly
Capacity cannot increase
Capacity goes down
0.20 MPa
No restriction
8 hp
10 hp
12 hp
14 hp
16 hp
Secondary current
Limit current 2 (A)
Max. current 2 L (A)
22.5
22.5
21.0
21.8
20.6
17.5
19.0
19.0
17.1
18.3
hp = horsepower
hp = horsepower
Max. current 2 H (A)
18.5
20.0
20.0
18.1
19.3
Constant speed compressor
8 hp
10 hp
12 hp
14 hp
16 hp
Limit current (A)
14.9
12.4
12.4
-
-
hp = horsepower
Limit current 2
Max. current 2 L
Stop
If this current is detected at regular intervals, alarm appears.
Frequency of inverter compressor goes down.
Frequency of inverter compressor can increase.
Frequency of inverter compressor cannot increase.
Max. current 2 H
SM830226-00̲3WAY ECO-i SYSTEM.in11 11
SM830226-00̲3WAY ECO-i SYSTEM.in11 11
2013/02/13 11:52:24
2013/02/13 11:52:24
