Storch Airless ST 850 Handbuch Seite 171

Problem
Pump is difficult to prime
Sprayer operates for 5 to 10
minutes then stops
Electrical
Symptom: Sprayer does not run, stops running, or will not
shut off.
Perform Pressure Relief Procedure.
1. Plug sprayer into correct voltage, grounded outlet.
2. Turn the ON/OFF switch OFF wait 30 seconds and
then turn power back ON again (this ensures sprayer is in
normal run mode).
Problem
Sprayer does not run at all
AND display is blank
OR control board status light
never lights
Sprayer does not shut off AND
display shows E = 02 OR con-
trol board status light blinks 2
times repeatedly
What to check
If check is OK, go to next check
Air in pump or hose.
Intake valve is leaking.
Pump packings are worn.
Paint is too thick.
Pump packing nut too tight. When
pump packing nut is too tight the
packings on the pump rod restrict
pump action and overloads the
motor.
What to check
See flow chart
Sprayer will not run
Control board.
171
What to do
When check is not OK, refer to this column
Check and tighten all fluid connections. Cycle
pump as slowly as possible during priming.
Clean intake valve. Be sure ball seat is not
nicked or worn and that ball seats well. Reas-
semble valve.
Replace pump packings. See pump manual.
Thin the paint according to supplier recommen-
dations.
Loosen pump packing nut. Check for leaks
around throat. If necessary, replace pump
packings. See Pump manual.
3. Turn pressure control knob clockwise 1/2 turn.
4. View digital display or remove control box cover to
view control board status light. To determine which
code (or any other code besides voltage supply) refer to
the control board status light. Turn the ON/OFF switch
OFF, remove the control cover then turn power back ON.
Observe the status light. Blinking LED total count equals
the error code (for example: two blinks equals CODE 02).
Keep clear of electrical and moving parts during trou-
bleshooting procedures. To avoid electrical shock haza-
rds when covers are removed for troubleshooting, wait 7
seconds after disconnecting power cord for stored electri-
city to dissipate.
How to check
Replace control board.
Original instruction