Delta Electronics AC Motor Drive VFD-EL User Manual

Revision August 2008, 2ELE, V1.02 6-1
Chapter 6 Fault Code Information and Maintenance
6.1 Fault Code Information
The AC 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. The following faults are displayed as shown on the AC motor drive digital keypad display.
The five most recent faults can be read from the digital keypad or communication.
NOTE
Wait 5 seconds after a fault has been cleared before performing reset via keypad of input terminal.
6.1.1 Common Problems and Solutions
Fault
Name
Fault Descriptions Corrective Actions
Over current
Abnormal increase in current.
1. Check if motor power corresponds with the
AC motor drive output power.
2. Check the wiring connections to U/T1, V/T2,
W/T3 for possible short circuits.
3. Check the wiring connections between the AC
motor drive and motor for possible short
circuits, also to ground.
4. Check for loose contacts between AC motor
drive and motor.
5. Increase the Acceleration Time.
6. Check for possible excessive loading
conditions at the motor.
7. If there are still any abnormal conditions when
operating the AC motor drive after a short-
circuit is removed and the other points above
are checked, it should be sent back to
manufacturer.
Over voltage
The DC bus voltage has
exceeded its maximum
allowable value.
1. Check if the input voltage falls within the
rated AC motor drive input voltage range.
2. Check for possible voltage transients.
3. DC-bus over-voltage may also be caused by
motor regeneration. Either increase the
Decel. Time or add an optional brake resistor
(and brake unit).
4. Check whether the required brake power is
within the specified limits.

Delta Electronics AC Motor Drive VFD-EL Specifications

General

Input Frequency	50/60 Hz
Control Method	V/F control
IP Rating	IP20
Humidity	Less than 90% RH (non-condensing)
Output Voltage	0 to Input Voltage
Overload Capacity	150% for 60 seconds
Braking Unit	Built-in
Protection Functions	Over voltage, Over current, Under voltage, Over temperature, Short circuit
Communication	RS-485 (Modbus)
Digital Output	1 (Relay output)
Analog Output	1 (0 to 10 VDC)
Operating Temperature	-10°C to +50°C
Storage Temperature	-20°C ~ +60°C
Altitude	1000m (Derating required above 1000m)
Input Voltage	1-phase 200 ~ 240VAC, 3-phase 200 ~ 240VAC, 3-phase 380 ~ 480VAC
Output Frequency	0.1 to 600 Hz
Power Range	0.2 kW ~ 3.7 kW
Digital Inputs	5 programmable digital inputs
Analog Input	2 (0-10V, 4-20mA)