Daikin VRV S RXQ4/5ARV1 Service Manual page 82

Control for 6/8 HP Outdoor Unit
2.6.3 Discharge Pipe Protection Control
This discharge pipe protection control is used to protect the compressor internal temperature
against an error or transient increase of discharge pipe temperature.
temperature > 108°C
2.6.4 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]
76
Normal control
Discharge pipe
Reduce compressor capacity step
Discharge pipe temperature > 135°C
Discharge pipe temperature standby
Condition
A
B
26
24
22
20
18
16
14
12
10
8
43 44 45
Discharge pipe
temperature < 95°C
Normal control
A
Reduce compressor step
Primary current [CTi1] (A)
Ta < 43 °C
> 27.0
≤ 25.0
Graph A
46 47 48
Ta (°C)
SiAF332111E
When occurring 3 times within 100
minutes, the error code F3 is output.
(Sub code - 01)
B
Ta ≥ 43 °C
> CTi1 in graph A
≤ CTi1 in graph B
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Part 4 Functions and Control
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