NorthStar M157117I.1 Owner's Manual page 52

PRESSURE WASHER SURGES OR CYCLES WHILE IN BYPASS
Causes
Leak between unloader and gun.
Gun leaking internally
Causes
Engine not at full throttle
Damper not adjusted properly
Poor quality fuel
Belt broken
Causes
Scale build-up in coil
Coil is full of soot
Causes
Inadequate detergent supply
High pressure hose too long
Chemical strainer or injector clogged
Troubleshooting
Solutions
Check all connections between unloader and gun for leaks.
Tighten loose components and replace damaged components.
Replace spray gun.
SMOKE FROM HEAT EXCHANGER
Solutions
Throttle engine all the way up.
Adjust the damper until the burner burns cleanly. See Burner
Adjustment.
Use kerosene for the cleanest burn.
Replace belt.
WATER NOT HEATING SUFFICIENTLY
Solutions
See Coil Descaling under Maintenance Instructions.
See Coil Desooting under Maintenance Instructions.
POOR OR NO DETERGENT SUPPLY
Solutions
Refill detergent container. Make sure chemical strainer is fully
submerged.
Use less hose. Move machine closer to the work.
Clean the strainer and injector. Always start with a clean detergent
container. Run clean water through the injector after each use.
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