Miller TRAILBLAZER 302 AIR PAK Owner's Manual page 64

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A complete Parts List is available at www.MillerWelds.com
Trouble
Air compressor stops after short period
of operation.
Low air pressure.
High air pressure.
Insufficient air delivery.
Oil in air from compressor.
Air compressor overheats.
OM-229 930 Page 60
Check compressor oil level (see Section 5-5). Automatic shutdown stops compressor if compressor tem-
perature is too high.
Circuit breaker CB5 is open. CB5 automatically resets when the compressor cools. If CB5 continues to
open, contact Factory Authorized Service Agent.
Check fan operation. Fan should run whenever compressor is on. Have Factory Authorized Service
Agent check fan circuit.
Clean debris from oil cooler. Automatic shutdown stops compressor if compressor temperature is too
high. Recirculation or open covers may cause overheating. Be sure all covers, panels, and doors are in
place. Operate in area with proper airflow.
Check for leaks in air lines and hoses, including control line.
Reduce air demand.
Close air outlet valve.
Check for frozen lines or hoses downstream from compressor outlet.
Adjust compressor air pressure (see Section 7-2).
Check air compressor air cleaner (see Section 11-4).
Check compressor oil level (see Section 5-5).
Check air/oil separator, and replace if plugged (see Section 11-4).
Check compressor belt and tension. Be sure correct belt is used and is properly installed. Replace belt
if damaged or stretched.
Have Factory Authorized Service Agent check compressor blow down valve, and for leaks in control
lines. Also check air compressor for rated output.
Adjust compressor air pressure (see Section 7-2).
Verify control line is connected at regulator valve and inlet valve. Check for frozen control lines. If ambient
temperature is cold, run unit for a period of time to allow heaters to thaw control lines and regulator.
Check air/oil separator, and replace if plugged (see Section 11-4).
Have Factory Authorized Service Agent check for leaks in control lines, and also check air gauge, com-
pressor air inlet valve, safety valve, air pressure switch, and internal heating system.
Check air compressor air cleaner (see Section 11-4).
Check air/oil separator, and replace if plugged (see Section 11-4).
Check for frozen lines or hoses downstream from compressor outlet.
Have Factory Authorized Service Agent check engine speed, and adjust if necessary.
Check compressor belt and tension. Be sure correct belt is used and is properly installed. Replace belt
if damaged or stretched.
Have Factory Authorized Service Agent check compressor air inlet valve, safety valve, air pressure
switch, and internal heating system.
Check compressor oil level (see Section 5-5). If oil level is too high, system becomes saturated with oil.
Open line (nothing connected to compressor outlet) will result in oil in air. Do not operate with open air
line.
Change compressor air/oil separator if close to replacement hours (see Section 11-4).
Wrong or mixed oil results in foaming which can cause oil in air. If mixed oil is suspected, replace oil, oil
filter, and air/oil separator.
Check connections of control lines.
Have Factory Authorized Service Agent check for plugged oil scavenge line.
Check compressor oil level (see Section 5-4). Automatic shutdown stops compressor if compressor tem-
perature is too high.
Verify adequate air flow to compressor. Check for blocked air intake. Recirculation or open covers may
cause overheating. Be sure all covers, panels, and doors are in place. Operate in area with proper airflow.
Automatic shutdown stops compressor if compressor temperature is too high.
Verify compressor fan is running while compressor is on. Contact Factory Authorized Service Agent if
fan is not operating properly.
Remedy