Delta VFD-V Series User Manual

7
VFD-V Series
DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
7-1
CHAPTER 7 ERROR MESSAGE AND TROUBLESHOOTING
The AC drive has a comprehensive fault diagnostic system that includes various alarms and
fault messages such as over-voltage, low-voltage and over-current. Once a fault is detected,
the corresponding protective functions will be activated, and the AC drive will stop the output
and the motor will then coast to stop. The following faults are displayed as shown on the AC
drive digital keypad panel. Once the fault occurred, eliminate it first, and then press the
RESET button after 5 seconds to reactivate the operation.
Problems and Solutions
Code Displayed Error Explanations Treatments
OC: output current of the
AC drive exceeds the OC
level

Extend the accel/decel time

Check whether the motor rating and
the AC drive rating match up with
each other

Check whether there is short-circuit
among U-V-W of the AC drive
 Check whether the wiring to the
motor is short-circuited or grounded

Check whether the screw between
the AC drive and the motor is
tightened or not

Check whether the motor is over
loaded
OV: DC voltage of the main
circuit exceeds the
over-voltage detection level
230 V Series: about 400V
460 V Series: about 800V

Check whether the input voltage is
within the scope of the rated input
voltage of the AC drive, and monitor
whether there is any occurrence of
the voltage transients

If it is of the motor inertia uprising
voltage that caused the exceeding
voltage on the DC high-voltage side
within the AC drive, the solution is to
extend the accel/decel time or install
the braking resistor (optional)
OH1: radiation base
over-heat
Temperature of the cooling
fan of the transistor module
exceeds the allowable
value

Check whether the fan is functioning
right and whether its ambient
temperature is within the rated
temperature

Delta VFD-V Series Specifications

General

Brand	Delta
Model	VFD-V Series
Category	Controller
Language	English