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Troubleshooting – Global Machinery Company AC40L User Manual

Page 13

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13

Troubleshooting

Trouble

Motor will not run, running too slow or
becoming excessively hot

Main compressor sticking/tight

Vibration or abnormal noise

Possible cause

1. Power fault or supply voltage too

low

2. Power cord too long or too thin

3. Faulty pressure switch

4. Faulty motor

5. Main compressor sticking/tight

1. Moving parts damaged by heat due

to insufficient lubrication

2. Moving parts damaged or blocked by

foreign particle

1. Loose part

2. Foreign body in main compressor

3. Piston connecting with the valve

seat

4. Moving parts excessively worn

Suggested remedy

1. Check the power supply

2. Use authorised service centre to

replace the power cord

3. Use authorised service centre to

repair or replace the switch

4. Use authorised service centre to

repair or replace the motor

5. Use authorised service centre to

repair or replace faulty parts.

Use authorised service centre to check
crankshaft, bearings, con rod, piston
rings, etc and replace where necessary.

1. Use authorised service centre to

check and repair if necessary

2. Use authorised service centre to

check and clean if necessary

3. Use authorised service centre to

increase size of gasket

4. Use authorised service centre to

repair or replace

5. If the release valve under the pressure switch cover (2)

fails to operate when the on/off button is pressed
down, switch the power supply off and determine the
nature of the fault.

6. Ensure that the lubricating oil is clean and that the oil

level is maintained at the mid point of the red circle in
the oil level glass (17)..

7. Take care when discharging air from the tank, i.e. from

the safety valve, the drain cock or the air outlet.
Compressed air can be extremely dangerous. Take care
the discharge air does not cause dust, stones or any
other foreign particles to be blown through the air and
that the air is discharged in a safe manner.

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