2920 7090 00
59
Instruction book
7 Problem
solving
Condition
Fault
Remedy
Insufficient air pressure
Air leak
Check and correct as
necessary
Air filter choked
Replace filter
Air pressure switch incorrectly
set
Adjust switch
Air consumption exceeds
maximum output of compressor
Check equipment connected
Damaged valve
Inspect valves and replace
parts where necessary
Unloader malfunctioning
Inspect and replace parts
where necessary
Solenoid valve out of order
Remove and check. Replace if
necessary
Unit does not speed up
Voltage drop at motor terminals Consult power supplier. Use
correct size of cable
Unloader malfunctioning
Inspect and replace parts
where necessary
Solenoid valve out of order
Remove and check. Replace if
necessary
Blow-off silencer choked
Replace
Air receiver pressure rises above
maximum and causes safety valve to
blow
Air pressure switch or pilot
valve incorrectly set or out of
order
Check. Replace switch or valve,
if necessary
Solenoid valve defective
Remove and check. Replace if
necessary
Unloader malfunctioning
Inspect and replace parts
where necessary
Blow-off silencer choked
Replace
Receiver does not hold pressure
Check valve leaks
Check for broken valve and
springs
Air leaks
Check and correct as
necessary
Too frequent starting/too short
operating periods
Air pressure switch or pilot
valve incorrectly set
Increase pressure difference
Check valve leaks
Check for broken valve and
springs
Unit does not start
Electrical failure
Have electrical system
checked. Check fuses and line
terminals for tightness
Summary of Contents for LF 10
Page 1: ...Atlas Copco Industrial aluminium piston compressor LF 2 LF 3 LF 5 LF 7 LF 10 Instruction book ...
Page 2: ......
Page 12: ...10 2920 7090 00 Instruction book Power Pack with unloading valve Base mounted ...
Page 18: ...16 2920 7090 00 Instruction book Air flow and regulating system with DOL starter ...
Page 19: ...2920 7090 00 17 Instruction book Air flow and regulating system with Y D starter ...
Page 20: ...18 2920 7090 00 Instruction book Air flow and regulating system of trolley ...
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