Table of Contents
SiUS341615E
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.
Model
TAYDU
TATJU
Radiation fin temperature control
Perform the following control of integrated as well as multi units for each inverter compressor.
Model
TAYDU
TATJU
Functions and Control
Normal operation
A
Reduce compressor capacity
C
Inverter current standby
RXYQ72TA
Condition
M1C
A
> 11.0 A
B
< 11.0 A
C
> 13.0 A
A
> 27.6 A
B
< 26.5 A
C
> 33.5 A
Normal operation
A
Reduce compressor capacity
C
Fin temperature standby
RXYQ72TA
Condition
M1C
≥ 100°C (212°F)
A
B
< 97°C (207°F)
≥ 105°C (221°F)
C
≥ 83°C (181°F)
A
B
< 80°C (176°F)
≥ 105°C (221°F)
C
B
When occurring 3 times within 60
minutes, the error code L8 is
output.
RXYQ96/120TA
M1C
> 18.0 A
< 18.0 A
> 21.5 A
> 33.8 A
< 32.5 A
> 45.0 A
B
When occurring 4 times within 60
minutes, the error code L4 is output.
RXYQ96/120TA
M1C
≥ 82°C (180°F)
< 79°C (174°F)
≥ 86°C (187°F)
≥ 83°C (181°F)
< 80°C (176°F)
≥ 105°C (221°F)
Protection Control
RXYQ144/168TA
M1C
> 11.5 A
< 11.5 A
> 13.0 A
> 27.6 A
< 26.5 A
> 33.5 A
RXYQ144/168TA
M1C
≥ 98°C (208°F)
≥ 98°C (208°F)
< 95°C (203°F)
< 95°C (203°F)
≥ 105°C (221°F)
≥ 105°C (221°F)
≥ 82°C (180°F)
≥ 82°C (180°F)
< 79°C (174°F)
< 79°C (174°F)
≥ 85°C (185°F)
≥ 85°C (185°F)
M2C
> 11.5 A
< 11.5 A
> 13.0 A
> 27.6 A
< 26.5 A
> 33.5 A
M2C
64
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