SiAF341904E
Protection Control
Part 4 Functions and Control
89
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.
Radiation fin temperature control
Perform the following control of integrated as well as multi units for each inverter compressor.
Normal operation
Inverter current standby
Reduce compressor capacity
A
B
When occurring 3 times within 60
minutes, the error code
L8
is
output.
C
Condition
RXQ6/8A
RXQ10-14A
RXQ16/18A
RXQ20A
M1C
M1C
M1C, M2C
M1C
M2C
A
more than 17.0 A
more than 27.5 A
more than 17.0 A
more than 17.0 A
more than 27.5 A
B
less than 17.0 A
less than 27.5 A
less than 17.0 A
less than 17.0 A
less than 27.5 A
C
more than 17.6 A
more than 27.5 A
more than 17.6 A
more than 17.6 A
more than 27.5 A
Condition
All inverter compressors
A
more than 110 °C
B
less than 107 °C
C
more than 114 °C
Normal operation
Fin temperature standby
Reduce compressor capacity
When occurring 4 times within 60
minutes, the error code
L4
is output.
A
B
C
