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IMPULSE
®
•G+ Mini Technical Manual
November 2020
Page 134
6 Troubleshooting
6.1 Maintenance, Faults, and Alarms
In this troubleshooting section, “check” means investigating whether an item is functioning and in an acceptable
physical condition, and then taking corrective action (adjusting, fixing, replacing, etc.) as necessary. In the
Corrective Action column, you may not have to perform all of the steps to correct the problem.
6.1.1 Maintenance and Inspection
This section describes basic maintenance and inspection procedures for the IMPULSE
®
•G+ Mini.
Alarm and Fault classes are described as follows:
•
Major Fault: Brake is set, ALM indicator LED remains lit, fault is displayed on keypad and brake contact output
(terminals MC, MB, & MA) is deactivated. In order to continue operation the reset key must be pressed, a multi-
function digital input set for fault reset or power must be cycled.
•
Fault (minor): Brake is set, ALM/indicator LED flashes, fault code flashes in the keypad brake contact output
(terminals MC, MB, & MA) is deactivated. The reset key does not need to be pressed. The VFD will attempt to
run again at the next run command.
•
Alarm (Warning): Brake does not set, operation continues, ALM/indicator LED flashes, alarm code flashes,
brake contact output (terminals MC, MB, & MA) stay activated.
6.1.2 Motor Faults and Corrective Actions
Component
Check
Corrective Action
External terminals, connectors, mounting
screws, etc.
Loose screws or connectors
Securely tighten.
Heatsink
Build-up of dust and dirt
Blow with dry, compressed air
(57-86 psi).
Printed Circuit Board (PCB)
Accumulation of conductive dust or oil
Blow with dry, compressed air (57-86 psi).
If dust and oil cannot be removed,
replace the board.
Cooling Fan
Abnormal noise and vibration
Clean or replace the fan.
Power Components
Accumulation of dust or dirt
Blow with dry, compressed air
(57-86 psi).
Symptom
Corrective Action
Analog frequency reference is not stable (drifting).
1.
Stabilize the analog source.
2.
Increase B02.02.
3.
Increase B05.01, B05.02.
No motor rotation.
1.
Verify that power is on (Charge LED).
2.
Verify that the keypad display is not showing a fault.
3.
Verify that the run command is input to the VFD (U01.10).
4.
Check if motor stalled due to excessive current (U01.03).
Motor rotation is in the wrong direction.
1.
Verify FWD/REV or UP/DN is wired correctly at the interface board.
2.
Switch any two leads on U/T1, V/T2, or W/T3 going to the motor.
3.
Check parameter B03.04.
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