Franklin Electric CERUS X-DRIVE CXD-003A-4V, Installation And Operation Manual, Page: 157 / 252

MAINTENANCE
Troubleshooting
157
ovd
(8)
ov at decel
DC bus over-voltage during deceleration. When ovd occurs, the drive closes the gate of the output immediately, the
motor runs freely, and the display shows an ovd error.
Action and Reset
Action level 230V models: 410 VDC
460V models: 820 VDC
575V models: 1116 VDC
690V models: 1318 VDC
Action time Immediately act when DC bus voltage is higher than the level
Related parameters [SET-12] ; [VFD-22] ; [VFD-24] ; [SET-55] ; [PROT-04] ; [ADV-06] ; [VFD-37]
Reset method Manually
Reset condition Reset only when DC bus voltage is lower than 90% of the over-voltage level
Recorded Yes
Possible Causes Corrective Action
• Deceleration time is too short, causing
too large regenerative energy of the
load
• The setting for stall prevention level is
smaller than no-load current
• Power voltage is too high
• ON/OFF switch action of phase-in
capacitor in the same power system
• Motor ground fault
• Incorrect wiring of brake resistor or
brake unit
• Malfunction caused by interference
• Increase the setting value of [SET-12] , [VFD-22] , [VFD-24] , and [SET-55] (deceleration time)
• Connect brake resistor, brake unit or DC bus on the drive.
• Reduce the brake frequency.
• Replace the drive with a larger capacity model.
• Use S-curve acceleration/deceleration.
• Use over-voltage stall prevention
[PROT-04]
• Use auto-acceleration and auto-deceleration [ADV-06]
• Adjust braking level [VFD-37] or the bolt position of the brake unit.
• The setting for stall prevention level should be larger than no-load current
• Check if the input voltage is within the rated AC motor drive input voltage range, and check for
possible voltage spikes.
• If the phase-in capacitor or active power supply unit acts in the same power system, the input
voltage may surge abnormally in a short time. In this case, install an AC reactor.
• The ground short circuit current charges the capacitor in the main circuit through the power.
Check if there is ground fault on the motor cable, wiring box and its internal terminals. Trouble -
shoot the ground fault.
• Check the wiring of brake resistor or brake unit.
• Verify the wiring of the control circuit and wiring/grounding of the main circuit to prevent inter
-
ference.
Fault Display Description