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Instruction book
6 PROBLEM SOLVING
- Before starting repairs, press stop button O (10-Fig. 1.7),
wait until the compressor has stopped, press emergency
stop button (S3-Fig. 1.1) and switch off the voltage. Close
the air outlet valve; the air outlet valve can be locked as
described in section 4. Open manual drain valves (1 and
4-Fig. 1.5) and wait for at least 30 seconds (time needed
for the compressor to depressurize) before starting any
mechanical repairs. Wait at least 6 minutes before
starting any electrical repairs as hazardous high voltage
remains on the condensers of the start and speed
regulation unit for 6 minutes after switching off the
voltage. Furthermore, apply all relevant safety
precautions, including those mentioned in this book.
- The chart helps to solve mechanical problems. An
electrical fault must be traced by an electrician. Check
that the wires are not damaged and that they are clamped
tight to their terminals.
- Consult the "User manual for Elektronikon regulator" if a
service message or fault message appears on the display
(12-Fig. 1.7) or when alarm LED (7-Fig. 1.7) is alight or
blinks.
Mechanical faults and suggested remedies (Fig. 1.2)
Explanation of the table below:
- Conditions of the compressor, always preceded by a
number, are printed in bold.
- Each possible fault is followed by its relevant suggested
remedy and both are preceded by the same letter.
1 Condensate is not discharged from moisture trap
during operation
a Discharge flexible clogged
a Check and correct as necessary
b Float valve malfunctioning
b Remove float valve assembly, clean and check
2 Compressor air output or pressure below normal
a Air consumption exceeds air output of compressor
a Check equipment connected
b Choked air inlet filter element (AF)
b Replace filter element
c Solenoid valve (Y1) malfunctioning
c Remove and check valve, replace if necessary
d Oil separator element (OS) clogged
d Replace element
e Air leakage
e Check and correct as necessary
f Safety valve (SV) leaking
f Remove and check. Replace if not airtight after reinstalling
g Compressor element (E) out of order
g Consult Atlas Copco
3 Safety valve (SV) blows
a Minimum pressure valve (Vp) malfunctioning
a Remove and check. Replace defective parts
b Oil separator element (OS) clogged
b Replace element
c Safety valve (SV) out of order
c Remove and check. Replace if not airtight after reinstalling
d On Full-feature compressors, dryer piping clogged due to
formation of ice
d Have the refrigerant system checked by Atlas Copco
4 Element outlet 1) or air outlet temperature above
normal
a Oil level too low
a Check and correct as necessary
b Oil cooler (Co) clogged
b Clean cooler
c By-pass valve (BV) malfunctioning
c Remove and test valve
d Air cooler (Ca) clogged
d Clean cooler
e Compressor element (E) out of order
e Consult Atlas Copco
f Insufficient cooling air or cooling air temperature too high
f Check for cooling air restriction or improve ventilation of
compressor room. Avoid recirculation of cooling air. If
installed, check capacity of compressor room fan
5 Motor temperature above normal
a Insufficient cooling air or cooling air temperature too high
a Check for cooling air restriction or improve ventilation of
compressor room. Avoid recirculation of cooling air. If
installed, check capacity of compressor room fan
b Insufficient sealing of door panels
b Check that all doors are closed, check seals of door panels
Footnote chapter 6
1) A warning message will appear on display (12-Fig. 1.7).
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