CompAir UK Ltd
5280D Compressor Publication 98407.1440
Page 33
1440.doc
FAULT
POSSIBLE CAUSE
RECOMMENDATION
Failure of unloader valve timer
Check and replace as
necessary.
No electrical supply to unloader
solenoid coil.
Check and replace as
necessary.
Electrical and/or mechanical failure of
unloader solenoid valve.
Check and replace as
necessary.
Lack of pilot air to solenoid valve.
Check pipework for blockages.
Air leak on pilot air pipework.
Check and rectify as necessary.
Loose diaphragm drain valve
clamping.
Check and rectify as necessary.
Punctured drain valve diaphragm.
Check and replace as
necessary.
Diaphragm drain valves held open.
Check for obstructions at valve
seat.
11.6
Compressor runs but fails to
build-up pressure
Failure of First stage suction valves
Check for damage/obstruction
and replace parts as necessary.
11.7
Partial or no pressure
on final stage only.
Manual valve on separator open.
Leak on high pressure pipework.
Check and close as necessary.
Trace and rectify as necessary.
Failure of timed drainage timer to
operate.
Check, adjust and replace as
necessary.
11.8
Compressor will not unload
automatically.
Solenoid valve manually overridden. Return valve to automatic
operation mode.
Leak on diaphragm drain valves.
Check drain valves for leak tight
operation. (for higher pressure
valves leak will cause 'frosting' of
body and pipe.
11.9
Constant bleed of Air from
diaphragm drain valves.
Leak on high pressure pipework.
Trace and rectify as necessary.
Faulty compressor stage valve (s)
and/or valve cover O seals.
Check, service, replace valve (s)
as necessary.
Note: Fault usually lies with
suction valve immediately before
stage safety valve operating.
Valve not seating or insufficient
torque for holding down valve.
Check condition of seat, tighten
to correct valve cover torque.
11.10
Interstage safety valve
blowing
Final stage piston seizure
check and replace parts as
necessary.
11.11
Final stage safety valve
blowing
Restriction/blockage in pipework from
compressor.
Check operation of non-return
valve on compressor outlet,
setting of any line valves,
condition of line filters and
auxiliary equipment.
Pressure switch incorrectly set or
faulty.
Check, adjust or replace as
necessary.
11.12
Compressor shut down
before working pressure
reached.
Safety switch operating
Identify all safety devices and
"short-out" each in turn to identify
problem switch.
Summary of Contents for 5280D.1.IAC
Page 3: ...DATE REMARKS DATE REMARKS logsheet5280 d...
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Page 44: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 38 1440 doc CRANKCASE 1...
Page 46: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 40 1440 doc CRANKCASE 2...
Page 48: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 42 1440 doc CRANKCASE 3...
Page 50: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 44 1440 doc CYLINDER 1st STAGE...
Page 52: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 46 1440 doc SUCTION VALVE COVER...
Page 60: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 54 1440 doc CROSSHEAD 1st STAGE...
Page 62: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 56 1440 doc PISTON 1st STAGE...
Page 64: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 58 1440 doc GLAND 1st STAGE...
Page 66: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 60 1440 doc OIL PUMP...
Page 68: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 62 1440 doc OIL PUMP FILTER...
Page 70: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 64 1440 doc INTERCOOLER...
Page 72: ...CompAir UK Ltd 5280D Compressor Publication 98407 1440 Page 66 1440 doc 1st STAGE PIPE WORK...
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Page 120: ...CompAir UK Ltd APP 004 ANTI VIBRATION MOUNTS Page 2 app004 doc...
Page 122: ...CompAir UK Ltd PUBLICATION APP070 PRESSURE GAUGES GENERAL Page 2 app070 doc...
Page 128: ...CompAir UK Ltd PUBLICATION APP 138 3 WAY SOLENOID VALVES PS2197 Page 2 app138 doc...
Page 130: ...CompAir UK PUBLICATION APP034 ELECTRIC MOTOR MAINTENANCE GENERAL Page 2 APP034 doc...
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