36 TROUBLESHOOTING
6.1 INTRODUCTION
This section contains instructions for troubleshooting the equipment following a malfunction. Each issue or
problem is followed by a list of probable causes and suggested actions to be followed in order to eliminate
the cause.
The actions listed should be performed in the order listed, although the order may be varied if the need is
indicated by conditions under which the problem occurred. The action which can be performed in the least
6.2 UNPLANNED SHUTDOWN
POSSIBLE CAUSE ACTION
Engine fault codes present Machine not out of warm-up mode; allow machine to
complete warm-up.
Low fuel Fill the machine with fuel and retest.
High compressor discharge temperature Check compressor oil level; add as needed.
Clean the coolers and pressure check.
Check the fan belt tension. Adjust or replace as needed.
Verify correct operation of thermal by-pass valve.
Clean oil cooler internally.
Inspect and clean the thermal by-pass valve by
removing valve from bypass housing. Sediment particles
can lodge in the valve-seating surface and prevent
from closing, allowing hot oil to pass directly to the
compressor without being cooled.
tank(s).
Low engine coolant and/or high engine coolant
temperature
Check the engine coolant level. Add as needed.
Clean the coolers.
Check the fan belt tension. Adjust or replace as needed.
Refer to Engine Manufacturer’s manual.
Low engine oil pressure fault code Check engine oil; add as needed.
Verify the engine oil pressure exceeds engine
manufacturer’s spec with the engine running.
Obstruction in radiator and/or oil cooler Remove any external obstructions and clean the coolers.
Improper fan belt tension Replace the fan belt or tensioner as needed.
Broken hoses or oil lines Repair/Replace any broken hoses or oil lines.
Loose or broken wires Repair/Replace any loose or broken wires.
If none of the above caused the shutdown, restart the engine and observe the engine oil pressure, engine
water temperature, and compressor discharge temperature and pressure. If it is found that low engine oil
pressure or high engine water temperature is causing the shutdown, refer to the Engine Manufacturer’s
manual.
6.3 DISCHARGE PRESSURE IS TOO LOW
POSSIBLE CAUSE ACTION
Start/Run valve in the START position Move the Start/Run valve to the RUN position and retest.
Too much air demand Add additional compressor to handle the demand or
decrease the air demand.
Service valve open Close service valve and retest.
Regulator valve faulty or mis-adjusted Properly adjust the regulator.
Rebuild/replace the regulator valve if necessary.
Service line leaks Repair any leaks found and retest.
To Next Page
Loading...
