SiBE18-821_C Protection Control
Function 91
4.4 Inverter Protection Control
Inverter over current protection control and inverter fin temperature control are performed to
prevent tripping due to a malfunction, or transient inverter overcurrent, and fin temperature
increase.
[Inverter overcurrent protection control]
[Inverter fin temperature control]
Not limited
Limited
Inverter current > 23.8 A
Inverter current > 23.8 A
Inverter current ≥ 24.9 A continues for 260 sec.
&
&
Inverter current
standby
Inverter current ≤ 23.8 A
continues for 3 min.
Keeping the current step.
Without conditions
(R12931)
Upper limit frequency:
1-step down from current
compressor frequency
Upper limit frequency:
1-step up from current
compressor frequency
•
When occurring 4 times within 60 min.,
the error code "L8" is output.
Inverter current ≤ 23.8 A
Upper limit frequency = max Hz
10 sec.
Matching of frequency
Not limited
Limited
Tfin ≥ 78˚C
Tfin ≥ 78˚C
Tfin ≥ 83˚C
Fin temperature standby
&
&
Tfin ≤ 75˚C
continues for 3 min.
Keeping the current step.
Without conditions
(R12932)
Upper limit frequency:
1-step down from current
compressor frequency
Upper limit frequency:
1-step up from current
compressor frequency
•
When occurring 4 times within 60 min.,
the error code "L4" is output.
Tfin < 75˚C
U
pper limit frequency = max Hz
10 sec.
Matching of frequency
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