Specifications

5. ZVD Troubleshooting and Fault Information
5-1
The ZVD motor drive has a comprehensive fault diagnostic system that includes several
different alarms and fault messages. Once a fault is detected, the corresponding
protective functions will be activated to shut down the drive output. Below are the fault
descriptions for a fault shown on the digital keypad display. The four most recent faults
can be read on the digital keypad display (codes 06-08 through 06-11.
NOTE: After faults occur, press RESET to begin using the drive again.
Fault
Name Fault Descriptions Corrective Actions
The AC drive detects an abnormal
increase in current.
IGBT protection
The AC drive detects that the
DC bus voltage has exceeded its
maximum allowable value.
The AC drive temperature sensor
detects excessive heat.
The AC drive detects that the DC
bus voltage has fallen below its
minimum value.
1. Check whether the motors horsepower
corresponds to the AC drive output power.
2. Check the wiring connections between the
AC drive and motor for possible short circuits.
3. Increase the Acceleration time.
4. Check for possible excessive loading
conditions at the motor.
5. If there are any abnormal conditions when
operating the AC drive after short-circuit
being removed, it should be sent back to
manufacturer.
1. Check whether the input voltage falls within
the rated AC drive input voltage.
2. Check for possible voltage transients.
3. Bus over-voltage may also be caused by
motor regeneration. Either increase the decel
time or add an optional braking resistor.
4. Check whether the required braking power
is within the specified limits.
1. Ensure that the ambient temperature falls
within the specified temperature range.
2. Make sure that the ventilation holes are not
obstructed.
3. Remove any foreign objects on the heatsinks
and check for possible dirty heat sink fins.
4. Provide enough spacing for adequate
ventilation.
1. Check whether the input voltage falls within
the rated AC drive’s input voltage.