Johnson T8000PRO, Service Manual

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Running speed is not stable
Possible causes:
1. AC power voltage is too low.
2. Tension of drive belt or running belt is too loose.
3. Inverter is damaged.
4. Motor is damaged.
Fix:
1. Check the power voltage by using voltage-meter to see if it is within
120V 15% or 230V 15%.
If the power voltage isn't within the range, look for a qualified electrician for
help.
2. Open the motor cover, if the belt has stretched and is slipping across the rollers
when running.
Adjust the belt tension (Please refer the” TENSIONING THE BELT
PROCEDURE”……. Page5-6).
2. Replace new Inverter.
3. Replace new Motor.