Section 7: Service; Troubleshooting - Grizzly EXTREME Series Owner's Manual

SECTION 7: SERVICE

Review the troubleshooting procedures in this section if a problem develops with your machine. If you need
replacement parts or additional help with a procedure, call our Technical Support. Note: Please gather the
serial number and manufacture date of your machine before calling.
Motor & Electrical
Symptom Possible Cause
Machine does 1. Incorrect power supply voltage or circuit size.
not start, or
power supply
2. Plug/receptacle at fault/wired incorrectly.
breaker
3. Power supply circuit breaker tripped or fuse
immediately
blown.
trips after
4. Motor wires connected incorrectly.
startup.
5. Thermal overload relay has tripped/at fault.
6. Contactor not energized/at fault.
7. Wiring broken, disconnected, or corroded.
8. ON button loose/misadjusted/at fault.
9. Auxiliary contactor at fault.
10. Motor or motor bearings at fault.
Motor rotates 1. Power connections are wired out of phase.
clockwise.
Machine 1. Motor wires connected incorrectly.
stalls or is
2. Downdraft table is undersized.
underpowered.
3. Plug/receptacle at fault/wired incorrectly.
4. Motor overheated.
5. Extension cord too long.
6. Contactor not energized/at fault.
7. Motor or motor bearings at fault.
Machine has 1. Motor loose.
vibration or
noisy operation.
2. Motor fan rubbing on fan cover.
3. Motor bearings at fault.
Work light 1. Switch disabling key removed.
AND auxiliary
2. Circuit breaker tripped.
power tool do
3. Incorrect power supply voltage or circuit size.
not turn ON, or
auxiliary power
4. Power supply circuit breaker tripped or fuse
supply breaker
blown.
immediately
trips after
5. Wiring broken, disconnected, or corroded.
startup.
6. ON/OFF switch or circuit breaker at fault.
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Troubleshooting

Possible Solution
1. Ensure correct power supply voltage and circuit size
(Page 13).
2. Test for good contacts; correct wiring (Page 45).
3. Ensure circuit is free of shorts. Reset circuit breaker or
replace fuse.
4. Correct motor wiring connections (Page 45).
5. Reset. Adjust or replace if at fault.
6. Test all legs for power; replace if necessary.
7. Fix broken wires or disconnected/corroded
connections (Page 45).
8. Tighten/adjust/replace button.
9. Replace auxiliary contactor.
10. Replace motor.
1. Correct phase polarity (Page 25).
1. Correct motor wiring connections (Page 45).
2. Use larger, more powerful downdraft table.
3. Test for good contacts; correct wiring (Page 45).
4. Clean motor, let cool, and reduce workload.
5. Move machine closer to power supply; use shorter
extension cord (Page 14).
6. Test all legs for power; repair/replace if at fault.
7. Replace motor.
1. Replace damaged or missing bolts/nuts or tighten if
loose.
2. Fix/replace fan cover; replace loose/damaged fan.
3. Test by rotating shaft; rotational grinding/loose shaft
requires bearing replacement.
1. Install switch disabling key.
2. Reset circuit breaker (Page 5).
3. Ensure correct power supply voltage and circuit size
(Page 13).
4. Ensure circuit is free of shorts. Reset circuit breaker or
replace fuse.
5. Fix broken wires or disconnected/corroded
connections (Page 45).
6. Replace switch/circuit breaker.
Model G0965 (Mfd. Since 04/23)