Magnetek Impulse G+ series 4, Technical Manual

Page: 200 / 248

IMPULSE•G+/VG+ Series 4 Technical Manual
November 2022
Page 200
SLC
Slack Cable
Detection
Slack Cable Fault. A hoist slack cable condition
occurred.
1. May not require corrective
action.
2. Check setting of Slack Cable
Detection (C11-xx).
X
SNAP
Snapped Shaft
Snapped Shaft Fault. A drive train discontinuity
has been detected.
Alarm or fault defined by C11-09.
1. Check for loose/broken
coupling.
2. Check for loose encoder(s).
3. Check for broken shaft.
X X
SNR
Follower Not Ready
Load Share follower not ready alarm. The Load
Share follower VFD ready signal has been lost.
1. Check for loose/broken wires.
2. Check digital input settings. X
TST END
Exit Test Mode
Exceeded the 10 minute time limit. 1. Ensure the test mode MFDI is
OFF.
2. Reset the fault (Fault Reset
MFDI, Keypad, or cycle
power).
3. Ensure that test mode is not
used for normal operation.
X
UBNC
Unbalanced Cur
Current Unbalance. Current flow has become
unbalanced.
Exclusive to 4810 and 41090 models.
1. Check wiring.
2. Check for damaged
transistors.
3. Check for short circuits or
grounding problems on the
connected motor.
X
UL1
Upper Limit 1 Err
Upper Limit 1—SLOW DOWN Indicator. Upper
Limit 1—SLOW DOWN switch status is changed.
1. May not require corrective
action.
2. Check the limit switches
location and condition.
X
UL2
Upper Limit 2 Err
Upper Limit 2—STOP Indicator.
Upper Limit 2—STOP switch status is changed.
1. May not require corrective
action.
2. Check the limit switches
location and condition.
X
UL3
Upper Limit 3 Err
Upper Limit 3—Weighted Stop.
Upper Limit weighted limit switch tripped.
1. May not require corrective
action.
2. Check the position and
condition of the limit switch.
3. Check the conditions of/for
terminal H01-xx (U01-10).
X X
UT1
Undertorque Det 1
Undertorque Detection 1. The current is less
than L06-02 for more than L06-03.
Alarm or fault defined by L06-01.
1. Check settings.
2. Check motor coupling. X X
UT2
Undertorque Det 2
Undertorque Detection 2. The current is less
than L06-05 for more than L06-06.
Alarm or fault defined by L06-04.
1. Check settings.
2. Check motor coupling. X X
UV
DC Bus Undervolt
Undervoltage Fault. Undervoltage status occurs
for more than 2 sec during STOP.
1. Check the power wiring.
2. Replace any bad branch fuses.
3. Check collector system. X
UV1
DC Bus Undervolt
Undervoltage 1 Fault. Undervoltage status
occurs for more than 2 sec during RUN
command.
1. Check power wiring.
2. Correct the line voltage.
3. Check collector system. X
Display Description Corrective Action Fault Alarm