NVF5 Series User Manual Chapter 6 Parameter Function Description
overload early alarm.
When the early alarm level of motor overload FE.03 is set to 100%, the alarm
advance is 0. At this time, the early alarm and overload protection occur simultaneously.
6.9.3 Phase Loss Protection
Code
Name
Default
Setting
Range
Description
FE.24
Input Phase Loss
Detection
Selection
1
0
～
2
0
：
Input Phase Loss
Hardware Detection
1
：
Input Phase Loss
Software Detection
2
：
No Input Phase Loss
Hardware/Software
Detection
FE.25
Output Phase
Loss Detection
Selection
1
0
～
1
0
：
No Output Phase Loss
Software Detection
1
：
Output Phase Loss
Software Detection
1
）
Input Phase Loss Setting
If one phase is missing in the three-phase AC power supply of the inverter, the
inverter prompts whether to input the phase loss protection action.
The inverter input phase loss protection needs to be adapted to the motor (the same
power level as the inverter) with a load of more than 20% rated torque when selecting
software testing, which can prompt the input phase loss protection action.
2
）
Output Phase Loss Setting
Choosing if the inverter prompts output the phase loss protection action when any
phase is missing in U, V, W three-phase when the inverter is running with a motor.
6.9.4 Load Loss Protection
FE.17=1Load Loss Protection is effective
，
when inverter output current is less than
Load Loss Detection Level- FE.18
，
and the duration is more than Load Loss Detection
Time-FE.19
，
Load Loss Protectio will be effective.
If the load loss keep running is selected, when the load is recovered, the inverter will
automatically restore to the setting frequency.
Code
Name
Default
Setting Range
Description
FE.17
Load Loss
Protection
Selection
1
0
～
1
0
：
Ineffective
1
：
Effective
FE.18
Load Loss
Detection
Level
10.0%
（
0.0
～
100.0
）
%
100% equals motor
rated current
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