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Troubleshooting –
Nautilus MX3-500
Machine not Building circuit breaker tripped. Reset breakers or move cords to other outlets
turning on - Faulty power cord Replace cord (AX33)
No power Faulty switches or internal wiring Check wiring & test switches - Repair as needed *
Solution
Pump Building circuit breaker tripped. Reset breakers or move cords to other outlets
not running Pump circuit breaker tripped Reset breaker – Check available circuit power & pump
Faulty power cord Replace cord (AX33)
Faulty switches or internal wiring Check wiring & test switches - Repair as needed *
Pump motor breaker tripped Push in reset button on pump motor &/or external breaker
Pump motor faulty Replace pump motor (PT066)
Pump seized - trips breaker
Repair or replace pump head & bearing (PT065) - Check
motor and/or replace complete pump & motor assy. (AP52)
Low Solution Jets too large for pressure desired
Check jets size & flow rates use smaller jets or lower
pressure
Pressure
and/or Jets worn allowing too much flow Replace jets
Pulsation Solution inlet filter plugged Clean or replace filter
Hose from solution tank restricted Repair or replace hose
Pump intake hose or fittings
leaking Repair or replace hose. Tighten clamps or replace fittings
Pressure regulator sticking Lube o-rings on regulator piston – PAGE 33
Pressure regulator faulty Repair or replace pressure regulator (PT021)
Filter screen or jets plugged on
tool Clean out filter or jets
Solution tank empty Add water to tank - Check & repair auto fill assembly
Pump not primed Perform pump priming procedure
Pump faulty Repair or replace pump (PT065 or AP52)
Tool valve faulty Repair or replace valve
Quick connects or hoses restricted Clean out or replace quick connects and/or hoses
Can't connect Pressure in lines Release pressure
solution hose Quick connects faulty Replace quick connects (AH101B, AH102B)
to machine Wrong style/size quick connects Replace quick connects to match connects on machine
*
: To reduce the risk of fire electrical shock or injury repairs to wiring should only be
performed by experienced service technicians.
If you are not experienced in checking electrical wiring contact your nearest authorized service
center to perform tests and repairs to wiring and switches.
Troubleshooting
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