Compressor Body Protection Control; Inverter Protection Control - Daikin VRV RXYQ72-384XAYCA Service Manual

SiUS342004EB
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
This control is performed for each compressor.
Overcurrent
Protection
Control
Part 4 Functions and Control
Normal control
Compressor body
temperature > 108°C (226.4°F)
Reduce compressor capacity step
Compressor body
temperature > 135°C (275°F)
Compressor body temperature standby
Normal control
A
Reduce compressor capacity
Inverter current standby
RXYQ72/96/120XA
Condition
RXYQ72/96/120XB
A more than 16.8 A
B less than 16.3 A
C more than 17.3 A
When occurring 3 times within 100 minutes,
the error code F3 is output. (Sub code - 20, 21, 22)
B
C
When occurring 3 times within 60
minutes, the error code L8 is output.
RXYQ144/168XA
RXYQ144/168XB
more than 25.5 A
less than 24.7 A
more than 26.0 A
Protection Control
98