User Manual

P/N: 192047082 (REV AA) 627NH January 2018
33
OT2
Overtorque
Det 2
Overtorque Detection Level 2 Fault. Defined by L06.05. Alarm defined by L06.04. 1. Check for proper programming for L06.XX constant.
OV
DC Bus Overvolt
Overvoltage Fault. The DC bus voltage exceeded for overvoltage level.
Detection level: 230V class-approximate 410V 460V class-approximate 820V
1. Extend the deceleration time.
2. Check for proper DBU operation.
3. Check the resistor.
4. Check the line voltage.
5. If on a load break hoist, check the gear box.
OV (flashing)
DC Bus Overvolt
Overvoltage Fault. Overvoltage occurs during stop. Main circuit DC voltage rises
above the detection level while the drive output is off. Detection level: 410V or
more for 230V, 820V or more for 460V.
1. Check the line voltage.
PF
Input Pha Loss
Input Phase Loss Fault. Inverter input power supply has open phase.
1. Check the line voltage.
2. Remove power.
3. Retighten the input terminal screws.
4. Check the fuses.
RR
DynBrk Transistr
Braking Transistor Fault. Internal Braking transistor failed.
1. Verify that the external braking resistor is con-
nected to the proper terminals.
2. Confirm that the proper resistor is installed.
3. Check for a short circuit across the braking resistor.
UL1
Upper Limt 1 Err
Upper Limit 1-SLOW DOWN Indicator. Hoist has reached upper slow approach
limit. No action is required. Slow approach limits can be disabled by following the
instructions on page 18.
1. May not require corrective action.
2. Check the position of the Limit Switch.
UL2
Upper Limt 2 Err
Upper Limit 2-Stop Indicator. Hoist has reached upper limit. Run hoist DOWN away
from upper limit. If limit is set in an inappropriate place, follow the instructions to
reset limits on page 18.
1. May not require corrective action.
2. Check the position of the Limit Switch.
UL3
Upper Limt 3 Err
Upper Limit 3-Weighted Stop. Upper Limit weighted limit switch tripped
1. May not require corrective action.
2. Check the position of the Limit Switch.
3. Check the condition of the Limit Switch.
4. Check the conditions of/for input terminal H01.XX
(U01.10)
UT1
Undertorque
Det1
Undertorque Detection 1. The current is less than L06.02 for more that L06.03.
1. Check settings.
2. Check motor coupling.
UT2
Undertorque
Det2
Undertorque Detection 2. The current is less than L06.05 for more that L06.06.
1. Check settings.
2. Check motor coupling.
UV (Flashing)
DC Bus
Undervolt
Undervoltage Fault. Undervoltage status occurs for more than 2 sec during STOP.
Input voltage drops below 190V DC or less for 230V AC class, 380V DC or less for
460V AC class.
1. Check the power source wiring.
2. Replace and bad branch fuses.
3. Check collector system.
UV1
DC Bus
Undervolt
Undervoltage 1 Fault. Undervoltage status occurs for more than 2 sec during RUN
command. Input voltage drops below 190V DC or less for 230V AC class, 380V DC
or less for 460V AC class.
1. Check the power source wiring.
2. Correct the line voltage.
3. Check collector system.
UV2
CTL PS
Undervolt
Undervoltage 2 Fault. The inverter detected a loss of 24V logic power
supply voltage.
1. Check the power source wiring.
2. Correct the line voltage.
3. Check collector system.
UV3
MC Answerback
MC Fault. The pre-charge contactor opened during operation
1. Check the power supply wiring.
2. Correct the line voltage.
3. Check collector system.
4. Wait 30-45 seconds before restarting drive after
auto shut down.