Troubleshooting And Maintenance; Faults And Alarms; Solution For The Most Frequent Problems - WEG CFW100 User Manual

Troubleshooting and Maintenance

6 TROUBLESHOOTING AND MAINTENANCE

6.1 FAULTS AND ALARMS

NOTE!
Refer to the CFW100 quick reference and the programming manual for further
information on each fault or alarm.

6.2 SOLUTION FOR THE MOST FREQUENT PROBLEMS

Problem
Motor will not start Incorrect wiring
Incorrect settings
Fault
Motor stall
Motor speed Loose connections
oscillates
Too high or too low Incorrect settings
motor speed (reference limits)
Motor nameplate
Display is off Keypad connections
Power supply voltage
Mains supply fuses open
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Table 6.1: Solution for the most frequent problems
Point to be Verified
1. Check all power and control connections.
1. Check if the parameter values are correct for the application.
1. Check whether the inverter is disabled due to a fault
1. Decrease the motor overload.
2. Increase P136, P137 (V/f).
1. Stop the inverter, turn off the power supply, check and tighten
2. Check all the internal connections of the inverter.
1. Check whether the values of P133 (minimum speed) and
1. Check whether the used motor matches the application.
1. Check the inverter keypad connection.
1. Rated values must be within the limits specified below:
1. Replace the fuses.
Corrective Action
condition.
all the power connections.
P134 (maximum speed) are properly set for the used motor
and application.
200-240 V power supply: - Minimum: 170 V
Maximum: 264 V.