North Star MHOTPWR - Manual (Page 18)

18
Troubleshooting Guide
Pressure Washer Will Not Run - No Power
Causes Solutions
Machine not plugged in Plug machine in
GFCI tripped Make sure machine is dry. Press RESET on the GFCI
Machine turned OFF Turn Pump switch ON
Line circuit breaker tripped Check for tripped circuit breaker in building
Circuit Breaker Trips During Operation
Causes Solutions
Voltage too low Check the voltage
Circuit Breaker Overloaded Make sure to use NEMA specified receptacle. Make sure there is no other
equipment using the same circuit. - see Specifications
Pressure set too high Check/adjust pressure setting on unloader.
Pressure Washer Runs But No Pressure
Causes Solutions
Partially clogged or damaged nozzle Clean or replace nozzle
Low water flow Make sure the water supply is more than 4 gpm
Pressure Washer Surges Or Cycles While In Bypass
Causes Solutions
Leak between unloader and gun. Check all connections between unloader and gun for leaks. Tighten loose
components and replace damaged components.
Gun leaking internally Replace spray gun
Smoke From Heat Exchanger
Causes Solutions
Air band not adjusted properly due to
different elevation Adjust the air band until the burner burns cleanly. See Oil Burner under
Installation Instructions
Poor quality fuel Use Kerosene for the cleanest burn
Water Not Heating Sufficiently
Causes Solutions
Scale build-up in coil See Coil Descaling under Maintenance Instructions
Coil is full of soot See Coil Desooting under Maintenance Instructions
Safety Relief Valve Sprays Water
Causes Solutions
Unloader/Burner Control Problem Call customer service
Poor Or No Detergent Supply
Causes Solutions
Soap control knob set too low. Adjust soap control knob
Inadequate detergent supply Refill detergent container. Make sure the chemical strainer is fully
submerged
High pressure hose too long Use less hose. Move machine closer to the work.
Chemical strainer or injector clogged Clean the strainer and injector. Always start with a clean detergent
container. Run clean water through the injector after each use.