Delta MS300 Series User Manual page 566

ID Display on LCD Keypad
10
Action Condition
Action Time
Fault Treatment Parameter
Reset Method
Reset Condition
Record
Cause
Power voltage is too high
ON/OFF switch action of phase-in
capacitor in the same power
system
Incorrect wiring of brake resistor or
brake unit
Malfunction caused by
interference
Hardware failure in voltage
detection
Motor ground fault
Fault Name
Over-voltage at stop
(ovS)
Action and Reset
230V models: 410 V
DC
460V models: 820 V
DC
575V models: 1116 V
DC
Immediately act when the DC bus voltage is higher than the level
N/A
Manual reset
Reset only when the DC bus voltage is lower than 90% of the over-voltage level
Yes
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 activates in the same
power system, the input voltage may surge abnormally in a short time. In this
case, install an AC reactor.
Check the wiring of the brake resistor or braking unit.
Verify the wiring of the control circuit and the wiring/grounding of the main
circuit to prevent interference.
Check if other error codes such as cd1–cd3 occur after cycling the power. If
yes, return to the factory for repair.
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.
Troubleshoot the ground fault.
557
Fault Descriptions
Over-voltage at stop
Corrective Actions
Chapter 14 Fault CodesMS300