Inverter Protection Control - Daikin RXQ12AHR Service Manual

SiAF341904E
6.5

Inverter Protection Control

Inverter current protection control and radiation fin temperature control are performed to prevent
tripping due to an error, or transient inverter overcurrent, and fin temperature increase.
In the case of multi-outdoor-unit system, each inverter compressor performs these controls in
the following sequence.
Inverter overcurrent protection control
Perform the following control of integrated as well as multi units for each inverter compressor.
RXQ6/8A
Condition
M1C
A more than 17.0 A
B less than 17.0 A
C more than 17.6 A
Radiation fin temperature control
Perform the following control of integrated as well as multi units for each inverter compressor.
Part 4 Functions and Control
Normal operation
A
Reduce compressor capacity
Inverter current standby
RXQ10-14A
M1C
more than 27.5 A
less than 27.5 A
more than 27.5 A
Normal operation
A
Reduce compressor capacity
Fin temperature standby
Condition All inverter compressors
A more than 110 °C
B less than 107 °C
C more than 114 °C
B
C
RXQ16/18A
M1C, M2C
more than 17.0 A
less than 17.0 A
more than 17.6 A
B
C
When occurring 4 times within 60
minutes, the error code L4 is output.
Protection Control
When occurring 3 times within 60
minutes, the error code L8 is
output.
RXQ20A
M1C
more than 17.0 A more than 27.5 A
less than 17.0 A
more than 17.6 A more than 27.5 A
M2C
less than 27.5 A
89