Troubleshooting And Maintenance; Operation Of The Faults And Alarms - WEG CFW-11 User Manual

TROUBLESHOOTING AND MAINTENANCE

This chapter:
- Lists all faults and alarms that may occur.
- Indicates the possible causes of each fault and alarm.
- Lists most frequent problems and corrective actions.
- Presents instructions for periodic inspections and preventive
maintenance in the equipment.

6.1 OPERATION OF THE FAULTS AND ALARMS

When a fault is detected (fault (FXXX)):
The PWM pulses are blocked;
The keypad displays the fault code and description;
The "STATUS" LED starts flashing red;
The output relay set to "NO FAULT" opens;
Some control circuitry data is saved in the EEPROM memory:
- Keypad and EP (Electronic Pot) speed references, in case the function "Reference backup" is enabled in
P0120;
- The fault code that occurred (shifts the last nine previous faults and alarms);
- The state of the motor overload function integrator;
- The state of the operating hours counter (P0043) and the powered-up hours counter (P0042).
Reset the inverter to return the drive to a "READY" condition in the event of a fault. The following reset options
are available:
Removing the power supply and reapplying it (power-on reset);
Pressing the operator key
Through the "Reset" soft key;
Automatically by setting P0206 (auto-reset);
Through a digital input: DIx=20 (P0263 to P0270).
When an alarm situation (alarm (AXXX)) is detected:
The keypad displays the alarm code and description;
The "STATUS" LED changes to yellow;
The PWM pulses are not blocked (the inverter is still operating).
(manual reset);
Troubleshooting and Maintenance
6
6-1