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Troubleshooting for Ge AV300i

This section outlines potential drive faults and their causes. Refer to the Table of Contents to locate information on a specific keyword.

Keypad Display Failure Alarms

FAILURE ALARM - POSSIBLE CAUSES

BU overload - The braking duty cycle exceeds the allowable range.

Bus loss - Bus connection failure (only with the interface Bus option card). Check the Bus connection for any issues.

Curr fbk loss - Connection failure between the regulation card and the TA transformer. Inspect the connection cable on the XTA connector.

DSP error - Processor program error. Turn off the drive and restart. If the issue persists, it may indicate an internal fault. Contact your service office for assistance.

Enable seqerr - The drive is powered up or RESET with the ENABLE input connected to 24V (activated) while in "terminal mode." Refer to the CONFIGURATION/Main Commands section for more details.*

External fault - An external failure is connected to terminal 15. If the "External fault" message appears, check the connection between terminals 16 and 18 (reference point) and/or 15 and 19. Ensure that the signal on terminal 15 is present (15 ... 30 V to terminal 16). If using an external voltage supply, connect the "commons" together.

Failure supply - Voltage supply fault; voltages are below the acceptable value. CAUTION: Turn off the voltage before removing terminal strips. The issue is often related to external wiring. Disconnect the plug-in terminal strips of the regulator card and enter the Reset command. If no other failures are reported, inspect your wiring for any short circuits or issues with cable shields. If the problem persists, try to RESET again. If still unsuccessful, the fault is likely internal. Contact your service office for further assistance.*

Heatsink ot (For sizes from 30 Hp ... and higher) - The temperature of the drive heatsink is too high. Possible causes include failure of drive fans, failure in the IGBT module in the power section, or a rapid overload current duty cycle.

Heatsink sensor - The ambient temperature is too high. Possible causes include failure of drive fans or a dirty heatsink.

Intake air ot (For sizes from 30HP ... and higher) - The temperature of the cooling air is too high. Possible causes include failure of drive fan(s) or an obstructed air intake.

Interrupt error - An unexpected interrupt has occurred. Turn off the drive and restart. If the issue persists, the fault is likely internal. Contact your service office for assistance.

Module overtemp (For sizes from 1HP to 20HP) - The temperature of the IGBT module is too high. Possible causes include failure of drive fans, failure in the IGBT module in the power section, or a rapid overload current duty cycle.

Output stages - Internal Overcurrent failure of the IGBT power section. Turn off the drive and restart. If the issue persists, contact your service office for assistance.

Overcurrent - Overcurrent in the motor circuit. Possible causes include a short circuit or ground fault at the output of the drive, incorrect tuning of the current regulator, or the drive connecting to a motor that is running when switched on. Ensure the auto capture function is activated. Turn off the drive and restart. If the issue persists, contact your service office for assistance.

Overvoltage - Overvoltage on the DC Bus due to energy regenerated from the motor. Solutions include lengthening the deceleration ramp or using a BU... braking unit to increase energy absorption capability.

Overtemp - Overtemperature of the motor (indicated via a thermistor on terminals 78/79). Possible causes include an interrupted cable between the thermistor in the motor and terminals 78 and 79, overheating of the motor due to an extreme load cycle, high ambient temperature at the motor location, failure of an external blower, or the motor not having an external blower and being overloaded at low speeds. Solutions include changing the load cycle, installing an external blower, or improving the cooling effect of the fan on the motor shaft.

Regulation ot - The temperature of the drive Regulator card is too high. The ambient temperature may be too high.

Speed fbk loss - Loss of speed feedback. Possible causes include the encoder not being connected or incorrectly connected. Select the Enc 1 speed parameter in the MONITOR\ Measurement \ Speed \ Speed in rpm menu and manually turn the motor clockwise (viewed from the front of the shaft) with the Drive disabled. The indicated value should be positive. If the indicated value does not change or random values are shown, check the power supply and cabling of the encoder. If the indicated value is negative, reverse the encoder connections by exchanging channel A+ and A- or B+ and B-.

Undervoltage - The line voltage parameter is incorrectly set. Remedy: set the parameter correctly and then acknowledge the failure via RESET. The incoming voltage to the power section of the device may be too low due to too low an AC input voltage, extreme line dips, or poor cable connections (e.g., terminals on contactor, choke, filter not properly tightened). Remedy: check connections.*

*To RESET the alarms, press [Escape]. If Enable and Start commands are configured for terminal mode, remove both commands before "Reset."

Note: The RESET alarm operation can also be configured for a digital input.

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