North Star 157394 ユーザーズマニュアル

- 12 -

The water pump will not start 

The motor thermic protection is open 

Check the mains voltage (+/- 5% 

 

 

tolerance).  Check the phases 

 

 

in the plug are connected well.

The water pump will not enter  

The no-return valve does not seal 

Replace the valve or the gasket 

in bypass 

 

and check the pressure valve 

 

 

body wear.

 

Leakage from the water system  

Eliminate the leaks

 

of the gun 

The water pump does not reach  

Nozzle worn 

Replace the nozzle

 

Pressure ball or adjustment housing  

Replace the faulty part

 

worn or spring broken

 

Pressure valve gaskets worn 

Replace the valve gaskets 

 

Pistons seal gasket worn 

Replace the gaskets 

 

Nozzle holding head in position  

Turn the head on high pressure

 

low pressure

Strong vibrations on the water pump 

Water supply insufficient 

Check the water supply flow and 

 

 

the relative pressure (2÷10)

 

 

Check the water filter and clean 

 

 

it if necessary

 

 

Prime the pump without the lance

 

Alien matter under a check valve 

Check the valves, clean and reassemble

The burner will not start 

Diesel filter blocked 

Clean the filter 

 

Diesel nozzle blocked 

Clean the filter 

 

Worn or broken electrodes 

Replace the electrodes 

 

The pressure switch remains open 

Replace the pressure switch 

 

Safety thermostat is open 

Replace the safety thermostat

Anormal noise of Diesel pump 

Low diesel 

Fill diesel tank or work on cold water 

No detergent suction 

High viscosity of the employed  

Further dilute the detergent 

 

detergent

 

Detergent filter blocked 

Clean the filter