Product Manual

Cod. 9828093011 00 - Edition 03/2015 - 43
ENGLISH
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19.0 TROUBLE-SHOOTING AND EMERGENCY REMEDIES
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N.B. OPERATIONS MARKED   MUST BE PERFORMED BY PROFESSIONALLY SKILLED PERSONNEL APPROVED THE
MANUFACTURER.
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ALL WORK MUST BE PERFORMED BY PROFESSIONALLY SKILLED PERSONNEL. BEFORE CARRYING OUT ANY
MAINTENANCE JOBS IT IS MANDATORY TO STOP THE MACHINE AND DISCONNECT IT FROM THE POWER MAINS.
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19.1 TROUBLE-SHOOTING AND EMERGENCY REMEDIES FOR SCREW COMPRESSOR (Standard controller for fixed speed
compressor)
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F
A
ULT FOUND POSSIBLE CAUSES OBSERV
A
TIONS
1) The machine does not start 1A - no power
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1B - the transformer protection device has
tripped
- check the power supply line,
Chapter 12.2
- replace fuses
2) The machine does not start
the pilot lamp (Ref. 8 Fig. 15) is flashes.
The pictograph appears intermittently
(Ref. 7 Tab. B)
2A - Phases
incorrect
2B - the main motor protection device has
tripped
2C – Temperature switch on element oulet
has
tripped
-
Verify phase sequence
- to check possible motor failure
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-environment temperature too high;
improve ventilation in the compressor
room, Chapter 9.2
  - cooling radiator is dirty, clean the
radiator
- oil level too low; top up the oil tank
3) The machine does not start
the pilot lamp (Ref. 8 Fig. 15) is flashes.
The pictograph appears intermittently
(Ref. 5 Tab. B)
3A - The
oil high temperature protection has
tripped
- environment temperature too high;
improve ventilation in the compressor
room, Chapter 9.2
  - cooling radiator is dirty, clean the
radiator
- oil level too low; top up the oil tank
4) The compressor does not reach working
pressure
4A - the compressed air consumption is
too high
4B - the discharge electrovalve remains
closed.
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  - check the electric system
5) Excess oil consumption
5A - deteriorated
oil separating
f
ilter
oil level is too high
  - change the oil separating
f
ilter,
Chapter 23
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19.2 - TROUBLE-SHOOTING AND EMERGENCY REMEDIES FOR SCREW COMPRESSOR (Graphic controller for fixed speed
compressor)
F
A
ULT FOUND POSSIBLE CAUSES OBSERV
A
TIONS
1) The machine does not start 1A - no power

1B - the transformer protection device has
tripped
-
check the power supply line,
Chapter 12.2

- replace fuses
2) The machine does not start
the pilot lamp (Ref. 5 Fig.16) is flashes.
The pictograph appears intermittently
(Status icons Shutdown)
2A - Phases
incorrect
2B - the main motor protection device has
tripped
2C – Temperature switch on element oulet
has tripped
-
Verify phases sequence
- to check possible motor failure

-environment temperature too high;
improve ventilation in the compressor
room, Chapter 9.2
  - cooling radiator is dirty, clean
the
radiator
- oil level too low; top up the oil tank
3) The machine does not start
the pilot lamp (Ref. 5 Fig.16) is flashes.
The pictograph appears intermittently
(Status icons Shutdown)
3A - The oil high temperature protection has
tripped
-
environment temperature too high;
improve ventilation in the compressor
room, Chapter 9.2
  - cooling radiator is dirty, clean the
radiator
- oil level too low; top up the oil tank
4) The compressor does not reach working
pressure
4A - the compressed air consumption is
too high
4B - the discharge electrovalve remains
closed.
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  - check the electric system
5) Excess oil consumption 5A - deteriorated oil separating
f
ilter
oil level is too high
  -
change the oil separating
f
ilter,
Chapter 23