Storch Airless ST 850 Mode D'emploi page 172

Problem
Sprayer does not run at all
AND Display shows E = 02
OR control board status light
blinks 2 times repeatedly
Sprayer does not run at all
AND display shows E=03
OR control board status light
blinks 3 times repeatedly
Sprayer does not run at all
AND display shows E = 04
OR control board status light
blinks 4 times repeatedly
Sprayer does not run at all
AND display shows E = 05 OR
Control board status
blinks 5 times repeatedly
Original instruction
What to check
Check transducer or trans-
ducer connections
Check transducer or trans-
ducer connections (control
board is not detecting a
pressure signal).
Check voltage supply to
the sprayer (control board
is detecting a multiple vol-
tage surges).
Control is commanding
motor to run but motor
light shaft does not rotate.
Possibly locked rotor con-
dition, an open connection
exists between motor and
control, there is a problem
with motor or control
board, or motor amp draw
is excessive.
How to check
Make sure there is no pressure in the system (see Pres-
sure Relief Procedure). Check fluid path for clogs, such
as clogged filter. Use airless paint spray hose with no
metal braid. A small hose or metal braid hose may
result in high-pressure spikes. Turn ON/OFF switch OFF
and disconnect power to sprayer. Check transducer and
connections to control board. Disconnect transducer
from control board socket. Check that transducer and
control board contacts are clean and secure. Reconnect
transducer to control board socket. Connect power, turn
ON/OFF switch ON and control knob 1/2 turn clockwi-
se. If sprayer does not run properly, turn ON/OFF switch
OFF and go to next step. Install new transducer. Con-
nect power, turn ON/OFF switch ON and control knob
1/2 turn clockwise. Replace control board if sprayer does
not run properly.
Turn ON/OFF switch OFF and disconnect power to spra-
yer. Check transducer and connections to control board.
Disconnect transducer from control board socket. Check
to see if transducer and control board contacts are cle-
an and secure. Reconnect transducer to control board
socket. Connect power, turn ON/OFF switch ON and
control knob to 1/2 turn clockwise. If sprayer does not
run, turn ON/OFF switch OFF and go to next step. Con-
nect a confirmed working transducer to control board
socket. Turn ON/OFF switch ON and control knob to 1/2
turn clockwise. If sprayer runs, install new transducer.
Replace control board if sprayer does not run.
Turn ON/OFF switch OFF and disconnect power to spra-
yer. Locate a good voltage supply to prevent damage to
electronics.
1. Remove pump and try to run sprayer. If motor runs,
check for locked or frozen pump or drive train. If sprayer
does not run, continue to step 2.
2. Turn ON/OFF switch OFF and disconnect power to
sprayer.
3. Disconnect motor connector(s) from control board
socket(s). Check that motor connector and control board
contacts are clean and secure. If contacts are clean and
secure, continue to step 4.
4. Connect a DC voltmeter across the two motor wires
– red & black spin the motor fan and check for a voltage
to register on the meter. If voltage is not present, check
brushes. If OK, replace motor. If voltage is present, go
to step 5.
5. Perform a spin test by connecting a 9 – 12 Volt batte-
ry 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 batte-
ry is connected to the motor leads.
172
black
red
yellow
9-Volt battery