Inverter Protection Control - Daikin VRV RXYMQ-A Series Service Manual

SiME332106E
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
Heating
Part 4 Functions and Control
Condition
A
B
Condition
A
B
26
24
22
20
18
16
14
12
10
8
43 44 45
Normal control
A
Reduce compressor step
Primary current [CTi1] (A)
Ta < 43 °C
> 27.0
≤ 25.0
Primary current [CTi1] (A)
> 26.5
≤ 24.5
Graph A
46 47 48
Ta (°C)
Protection Control
B
Ta ≥ 43 °C
> CTi1 in graph A
≤ CTi1 in graph B
49 50 51 52 53
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