113
DIAGNOSTICS AND TROUBLESHOOTING
PROBLEM
POINT TO BE
CORRECTIVE ACTION
CHECKED
Motor speed Loose connections 1.Disable the inverter, switch OFF the power supply and tighten all
varies connections.
(oscillates) Defective speed 1.Replace the defective speed potentiometer.
potentiometer
Variation of the external 1.Identify the cause of the variation.
analog reference
Motor speed Programming error 1.Check if the contents of P133 (minimum frequency)
too high or (reference limits) and P134 (maximum frequency) are according to the motor
too low application.
Signal of the 1.Check the control signal level of the reference.
Reference Control 2.Check the programming (gains and offset) at P234 to P240.
Motor nameplate 1.Check if the used motor meets the application requirements.
data
Display OFF Keypad connection 1.Check the keypad connections to the inverter.
Power supply 1.The power supply must be within the following ranges:
200-240V models: - Min: 170V
- Max: 264V
380-480V models: - Min: 323V
- Max: 528V
NOTE!
When contacting WEG for services, please have the following data on
hand:
Inverter model;
serial number, manufacturing date and hardware revision, as indicated
on the inverter nameplate (refer to section 2.4);
Software version (refer to section 2.2);
information about the application and inverter programming.
7.3 CONTACTING WEG
7.4 PREVENTIVE
MAINTENANCE
DANGER!
Always disconnect the power supply voltage before touching any
component of the inverter.
Even after switching OFF the inverter, high voltages may be present.
Wait 10 minutes to allow complete discharge of the power capacitors.
Always connect the equipment frame to a suitable ground (PE) point.
To Next Page
Loading...
Need help?
General
