Troubleshooting And Maintenance; Fault And Alarms; Solutions For The Most Frequent Problems; Data To Contact The Technical Assistance - WEG CFW500 User Manual

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Troubleshooting and Maintenance

6 TROUBLESHOOTING AND MAINTENANCE

6.1 FAULT AND ALARMS

NOTE!
Refer to the quick reference and to the programming manual of the CFW500
for further information about each fault or alarm.

6.2 SOLUTIONS FOR THE MOST FREQUENT PROBLEMS

Problem
Motor will not
start.
Motor speed
oscillates.
Too high or
too low motor
speed.
Display off.

6.3 DATA TO CONTACT THE TECHNICAL ASSISTANCE

For information or service request, it is important to have at hand the following data:
Inverter model.
„
Serial number and manufacturing date of the product identification label (refer to
„
IDENTIFICATION LABELS on page
34 | CFW500
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Table 6.1: Solutions for the most frequent problems
Point to be Verified
Incorrect wiring. 1. Check all the power and command connections.
Analog reference 1. Check if the external signal is properly connected.
(if used). 2. Check the status of the control potentiometer (if used).
Wrong settings. 1. Check if the parameters values are correct for the
Fault. 1. Check if the inverter is disabled due to a fault condition.
Motor stall. 1. Decrease the motor overload.
2. Increase P0136, P0137 (V/f).
Loose connections. 1. Stop the inverter, turn off the power supply and tighten all
2. Check all the internal connections of the inverter.
Defective speed 1. Replace the potentiometer.
reference
potentiometer.
Oscillation of the 1. Identify the cause of the oscillation. If the cause is electrical
external analog
reference.
2. Interconnect the GND of the analog reference to the
Incorrect settings 1. Check whether the content of P0133 (minimum speed) and
(reference limits).
Control signal of the 1. Check the level of the reference control signal.
analog reference 2. Check the setting (gain and offset) of parameters P0232 to
(if used).
Motor nameplate. 1. Check whether the motor used matched the application.
HMI connections. 1. Check the connections of the inverter external HMI.
Power supply voltage. 1. Rated values must be within the limits specified below:
Main supply fuse open. 1. Replace the fuses.
8).
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Corrective Action
application.
the connections.
noise, use shielded cables or separate them from the
power or command wiring.
grounding connection of the inverter.
P0134 (maximum speed) are properly set for the motor and
application used.
P0240.
200 / 240 V power supply: - Min: 170 V - Max: 264 V.
380 / 480 V power supply: - Min: 323 V - Max: 528 V.
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Section 2.4
Email: charles@automatedpt.com