Storch Airless ST 550 Mode D'emploi page 215

Problem
Sprayer does not run at
all
AND
Display shows E = 03
Sprayer does not run at
all
AND
Display shows E = 04
Sprayer does not run at
all
AND
Display shows E = 05
What to Check How to check
Check pressure Turn ON/OFF switch OFF and disconnect power to the sprayer.
sensor and its cable
Check pressure sensor and its cable connection.
connection. (Control
Disconnect pressure sensor from control board. Check that the
board is not receiving
contacts of the sensor and the control board are clean and for
a pressure signal).
any damage. Reconnect the sensor to the control board. Connect
power, turn ON/OFF switch ON and control knob to 1/2 turn clock-
wise. If the device is not working perfectly, set the on/off switch
to OFF, unplug the mains plug and install a new pressure sensor.
Turn ON/OFF switch ON and control knob to half turn clockwise.
Replace control board if device still does not run properly.
Check voltage sup- Turn ON/OFF switch OFF and disconnect power to the sprayer.
ply to the sprayer
Set up a good voltage supply to prevent damage to electronics.
(control board is
detecting a multiple
voltage surges).
Control is comman- 1.Remove pump and try to run sprayer. If motor runs, check if
ding motor to run but pump is blocked or frozen. If sprayer does not run, continue to
motor shaft does not step 2.
rotate.
2.Turn ON/OFF switch OFF and disconnect power to sprayer.
Possibly locked rotor
3. Disconnect motor connectors (red and black) from control board
condition, an open
sockets. Check that motor connector and control board contacts are
connection exists
clean and secure. If contacts are clean and secure, continue to step
between
4.
motor and control,
4. Connect a voltmeter (DC) across the two motor wires (red &
there is a problem
black), spin the motor fan and check for a voltage to register on the
with motor or control
meter during the turn. If voltage is not present, check brushes. If
board, or motor amp
OK, replace motor. If voltage is present, go to step 5.
draw is excessive.
5.Perform a spin test by connecting a 9 - 12 Volt battery to the
motor leads. Motor leads may vary in style and size. Locate the
two wires going to the carbon brushes normally Red and Black.
Motor should spin when battery is connected to the motor leads.
Black
215
Red
Yellow
9-volt battery
Original instruction