Storch Airless ST 550 Mode D'emploi page 221

Sprayer will not shut off
1. Perform Pressure Relief Procedure. Leave circulation val-
ve open (down) and switch ON/OFF switch OFF.
Troubleshooting Procedure
Connect an analogue manometer between
the device and the airless hose, connect a
spray to the power and set the on/off switch
to ON. Does sprayer reach or exceed its maxi-
mum pressure?
YES
Is the control board status light on?
YES
Unplug the pressure sensor from control
board. Does motor stop running?
YES
Install new pressure sensor.
2. Remove control box cover so the control board status
light can be viewed if available.
Mechanical problem: See the proper fluid
pump manual for the sprayer for further trou-
NO
ble shooting procedures.
Replace the control board.
NO
Replace the control board.
NO
221 Original instruction