Running speed is not stable
Possible causes:
1. AC power voltage is too low.
2. Tension of poly belt or running belt is too loose.
3. Poor adjustment of MCB.
4. MCB is damaged.
5. Motor is damaged.
Fix:
1. Check the power voltage by using voltage-meter to see if it is within
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.
3. Remove the motor cover and run the
machine at low speed, then adjust the R42
of MCB the variable resistance.
If it hasn't been improved, replace new
MCB.
4. Replace new motor.
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