38 TROUBLESHOOTING
6.9 ENGINE DOES NOT ACCELERATE OR WILL NOT MAINTAIN FULL
LOAD SPEED
POSSIBLE CAUSE ACTION
Compressor discharge pressure too high Adjust the pressure to the maximum operating pressure
for the machine.
Engine problem Have an authorized engine repair facility inspect the
engine.
Operating above maximum altitude rating of engine Refer to Engine Manufacturer's recommendation on
maximum altitude.
Engine fault codes present Machine not out of warm-up mode; allow machine to
complete warm-up.
6.10 SEPARATOR PLUGGING
POSSIBLE CAUSE ACTION
If the separator element has to be replaced frequently because it is plugging up, it is an indication that
foreign material may be entering the compressor inlet or the compressor oil is breaking down. Compressor
oil can break down prematurely for a number of reasons:
» Extreme operating temperature
» Failure to drain condensate from oil sump
» Using the incorrect type of oil
»
» Prolonged operation at extreme ambient temperatures
» Foreign material, gases or vapors entering compressor inlet
6.11 ENGINE SPEED CONTROL DOES NOT CHANGE TO IDLE SPEED WITH
SERVICE VALVES CLOSED
POSSIBLE CAUSE ACTION
Faulty pressure transducer Replace pressure transducer.
Faulty or broken wires to SPEC or pressure
transducer
Fix or replace broken wires.
Faulty SPEC
6.12 ENGINE SPEED CONTROL DOES NOT CHANGE TO FULL SPEED WITH
AIR DEMAND
POSSIBLE CAUSE ACTION
Start/Run valve is positioned in START instead
of RUN
Move the Start/Run valve to the RUN position.
Discharge Pressure Regulator faulty or improperly set Properly adjust the regulator.
Rebuild/replace the regulator if necessary.
Faulty pressure transducer Replace pressure transducer.
Faulty or broken wires to SPEC or pressure transducer Fix or replace broken wires.
Faulty SPEC
Engine fault codes present Machine not out of warm-up mode; allow machine to
complete warm-up.
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