Daikin VRV RXYQ72-384XAYCA, Service Manual

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SiUS342004EB Protection Control
Part 4 Functions and Control 98
6.4 Compressor Body Protection Control
This compressor body protection control is used to protect the compressor internal temperature
against an error or transient increase of compressor body temperature.
Control
The following control is performed for each compressor.
6.5 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.
In the case of multi-outdoor-unit system, each compressor performs these controls in the following
sequence.
Inverter
Overcurrent
Protection
Control
This control is performed for each compressor.
Normal control
Compressor body temperature standby
Reduce compressor capacity step
Compressor body
temperature > 108°C (226.4°F)
Compressor body
temperature > 135°C (275°F)
When occurring 3 times within 100 minutes,
the error code
F3 is output. (Sub code - 20, 21, 22)
Condition
RXYQ72/96/120XA
RXYQ72/96/120XB
RXYQ144/168XA
RXYQ144/168XB
A more than 16.8 A more than 25.5 A
B less than 16.3 A less than 24.7 A
C more than 17.3 A more than 26.0 A
Normal control
Inverter current standby
Reduce compressor capacity
A B
When occurring 3 times within 60
minutes, the error code L8 is output.
C