Atlas Copco LT 2 User Manual

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
Relief valve blows Defective inlet valve in HP
cylinder head
Inspect and replace part(s) as
necessary
Relief valve not airtight Replace valve
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
High oil consumption on LE/LT
compressors
Oil level too high Do not overfill crankcase. Keep
level in red circle of sight-glass
Piston ring(s) worn or broken Have condition of piston rings
checked
Instruction book
2920 7089 90 65

Atlas Copco LT 2 Specifications

General

Brand	Atlas Copco
Model	LT 2
Category	Air Compressor
Language	English