IMPULSE•G+/VG+ Series 4 Technical Manual
November 2022
Page 199
OT2
Overtorque Det 2
Overtorque Detection Level 2.
Defined by L06-05. Alarm or fault defined by L06-
04.
Check for proper programming for
L06-05 and L06-06.
X
X
OV
DC Bus Overvolt
Overvoltage Fault.
The main circuit direct
current voltage exceeded the overvoltage level.
1. Extend the deceleration time.
2. Check DBU operation.
3. Check the resistor.
4. Check the line voltage.
X
OV
DC Bus Overvolt
Overvoltage Fault.
Overvoltage occurs during
stop. Main circuit DC voltage rises above the
detection level while the VFD output is off.
Check the line voltage.
X
PF
Input Phase Loss
Input Phase Loss Fault.
VFD input power supply
has open phase.
1. Check the line voltage and
fuses.
2. Remove power.
3. Tighten input terminals.
X
PGO-1-S
PGO-1-H
PG Open Ch1
Pulse Generator Channel 1 Fault.
PGO-1-S, software detected fault.
PGO-1-H, hardware detected fault.
Alarm or fault defined by F01-21.
1. Check for proper direction of
encoder feedback.
2.
X
X
PGO-2-S
PGO-2-H
PG Open Ch2
Pulse Generator Channel 2 Fault.
PGO-2-S, software detected fault.
PGO-2-H, hardware detected fault.
Alarm or fault defined by F01-21.
1. Check for proper direction of
encoder feedback.
2.
X
X
PULSDEV
Pulse Deviation
Pulse Deviation.
The pulse input into terminal
RP compared to the pulse output from terminal
MP is greater than the percentage programmed
into H06-09.
1. During operation, verify that
there is an incoming pulse
signal on the RP terminal,
viewable at U01-54.
2. Increase the deviation margin
percentage in H06-09.
X
RF
Tr RFerr
Braking Resistor Fault.
The resistance of the
braking resistor is too low, or the proper braking
resistor has not been installed.
Verify correct braking resistor.
X
RH
DynBrk Resistor
Braking Resistor Overheat.
Deceleration time is too short and excessive
regenerative energy is flowing back into the VFD.
Verify correct braking resistor.
X
RR
DynBrk Transistr
Braking Transistor Fault.
Internal Braking
transistor failed.
1. Verify that the external braking
resistor is connected to the
proper terminals.
2. Confirm that the proper
resistor is installed.
3. Check for a short circuit across
the braking resistor.
X
SC
Short Circuit
Short Circuit Fault.
The VFD has detected an
output short circuit condition.
1. Disconnect the motor.
2. Check for a short circuit in the
motor or wiring using a
megger.
X
Display
Description
Corrective Action
Fault Alarm
Содержание Impulse G+ series 4
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