Delta VFD11AMS23ANSAA - Page 566

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