IMPULSE•G+/VG+ Series 4 Technical Manual
November 2022
Page 169
5.7.7 Hardware Protection
The IMPULSE•G+/VG+ Series 4 has several built-in functions designed to protect the VFD and its components
from damage.
Table 5-100: Hardware Protection Parameter Settings
Parameter
Display
Function
Range
Default
L08-02
OH Pre-Alarm Lvl
Heatsink temperature level for protection against
overheat (OH).
NOTE:
The VFD measures heatsink temperature
by a negative temperature coefficient
thermistor.
50–150°C
*
L08-03
OH Pre-Alarm Sel
Stopping method when heatsink overheat is
detected
0–5
3
0 Decel to Stop
Decel to stop using B05-02
1 Coast to Stop
Immediate stop
2 Fast Stop
Decel to stop using B05-08
3 Use B3-03 Method
Uses programmed B03-03 Method
4 Alarm Only
Operation continues and “OH Heatsink Overtemp”
is displayed on keypad
5 Run@L8-19 Rate
Continue operation at reduced speed L08-19.
L08-05
Ph Loss In Sel
Input phase loss detection
0, 1
1
0 Disabled
1 Enabled
L08-07
Ph Loss Out Sel
Output phase loss detection
0–2
1
0 Disabled
1 1PH Loss Det
2 2/3PH Loss Det
L08-08
Ph Loss Out Lvl
Output current level above which is considered an
output phase.
0.0–20.0%
5.0
L08-09
Ground Fault Sel
Ground fault detection
0, 1
1
0 Disabled
1 Enabled
L08-10
Fan On/Off Sel
Cooling fan operation
0, 1
0
0 Dur Run (OffDly)
1 Always On
L08-11
Fan Delay Time
When L08-10 = 0, fan will operate L08-11 seconds
after Run Command is removed
0–300 sec
60
L08-12
Ambient Temp
Adjusts Overload (OL2) Protection for high
ambients
-10–50°C
40
L08-13
UV3 Detect
Soft Charge Bypass Circuit Fault
0, 1
1
0 Disabled
1 Enabled
L08-15
OL2 Sel @ L-Spd
OL2 detection when output frequency
≤
6 Hz
0, 1
0**
0 Disabled
1 Enabled
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