SiME332106E
Protection Control
Part 4 Functions and Control
61
6.4 Inverter Protection Control
Inverter current protection control and radiation fin temperature control are performed to prevent
tripping due to an abnormality, or transient inverter overcurrent, and fin temperature increase.
Inverter overcurrent protection control by primary current [CTi1]
Cooling
Condition
Primary current [CTi1] (A)
Ta < 43 °C
Ta ≥ 43 °C
A
> 27.0
> CTi1 in graph A
B
≤ 25.0
≤ CTi1 in graph B
Heating
Condition
Primary current [CTi1] (A)
A
> 26.5
B
≤ 24.5
Normal control
Reduce compressor step
A
B
8
10
12
14
16
18
20
22
24
26
43
44
45
46
47
48
49
50
51
52
53
CTi1 (A)
Ta (°C)
Graph A
