AIR COMPRESSORS
DIRECT & BELT DRIVEN MANUALS
COPYRIGHT ADENDORFF MACHINERY MART
10
TROUBLESHOOTING CHART
IMPORTANT
I.
Any remedial work that may be required must be carried out by a qualified electrician/engineer.
II.
Disconnect from the mains supply before removing any parts from the compressor.
III.
Empty Air Receiver of air before dismantling any part of the compressor unit’s pressure system.
IV.
If your compressor develops a fault do not use until the fault has been rectified.
SYMPTOM
PROBABLE CAUSE
REMEDY
Compressor will not start auto-
matically
Fault in electrical installation
Let an electrician check the electrical installation
Current supply failure
Voltage drop
Motor starter faulty
Motor incorrectly connected or faulty
Starter overload has tripped out
Reset by depressing button
Pressure switch defective
Have pressure switch changed by an electrician
Compressor unit will not stop
automatically
Pressure switch defective
Contact Adendorff Machinery
Bleed valve under pressure
switch blows whilst compres-
sor is not running
Non-return valve leaking
Replace
Bleed valve under pressure
Non return valve stuck (NRV) open at junction
at the tank and the pump delivery pipe
Drain tank and remove inspection nut to clean
Non Return valve
Compressor unit starts, but
stops again after only a few
revolutions
Non-return valve leaking (compressor unit is
on load during start).
Disconnect from the mains supply and empty air
receiver. Clean or replace
Non-Return value blocked, possibly frozen up Thaw non-return valve out (unit must be installed
in frost-free place)
Solenoid valve leaking or defective (only
applies to certain models - where applicable
- and above)
Contact Adendorff Machinery
Unusual noise from compressor Bolts loose
Tighten bolts
V-Belt flywheel or cooling coil touching belt
guard
Find place of contact and remedy fault
Flywheel loose
Tighten flywheel
Unit installed on an unsuitable base
Move unit to a more solid base
Bearings, piston rings or cylinder worn
Contact Adendorff Machinery
Valve broken
Contact Adendorff Machinery
Bearings of electric motor worn
Contact Adendorff Machinery
Compressor unit starts and
stops more frequently than
usual
Large amount of condensation in air receiver
Drain off condensation at least once a day/week
Leaks in control unit or inspection cover
Locate leaks (by means of soapy water) and
repair
Too little pressure
Contact Adendorff Machinery
Compressor unit starts when no
air is being used
Leaks in pipework system
Locate and repair leaks
Electric motor too hot:
Maximum temperature 90°C
Operational voltage too low
Call an electrician
Faults in electrical installation
Contact Adendorff Machinery
Cooling fins of electric motor blocked by dirt
Clean cooling fins