Compressor Body Protection Control; Inverter Protection Control - Daikin VRV Aurora RXLQ-TATJU Series Service Manual

SiUS341802EC
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
RXLQ72TATJU
Condition RXLQ72TATJA
RXLQ72TBTJA
A more than 47.0 A
B less than 45.6 A
C more than 50.0 A
RXLQ96/120TATJU
Condition RXLQ96/120TATJA
RXLQ96/120TBTJA
Cooling more than 58.0 A
A
Heating more than 67.5 A
Cooling less than 56.3 A
B
Heating less than 65.5 A
C more than 72.0 A
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
C
Inverter current standby
When occurring 3 times within 100 minutes,
the error code F3 is output. (Sub code - 20, 21, 22)
B
When occurring 3 times within 60
minutes, the error code L8 is output.
RXLQ72TAYDU
RXLQ72TAYDA
RXLQ72TBYDA
more than 22.0 A
less than 21.3 A
more than 25.0 A
RXLQ96/120TAYDU
RXLQ96/120TAYDA
RXLQ96/120TBYDA
more than 30.0 A
more than 34.0 A
less than 29.1 A
less than 33.0 A
more than 38.0 A
Protection Control
RXLQ72TAYCU
RXLQ72TAYCA
RXLQ72TBYCA
RXYQ72/96/120TAYCU
RXYQ72/96/120TAYCA
more than 16.8 A
less than 16.3 A
more than 17.3 A
RXLQ96/120TAYCU
RXLQ96/120TAYCA
RXLQ96/120TBYCA
RXYQ144/168TAYCU
RXYQ144/168TAYCA
more than 20.5 A
more than 25.5 A
less than 19.9 A
less than 24.7 A
more than 26.0 A
102