Labconco SteamScrubbe & FlaskScrubbe Glassware Washers 44204 Series - Manual (Page 35)

Labconco Glassware Washer Service/Technical Manual
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2. Disconnect feed tube from valves and inlets (NOTE: depending on when
the alarm went off, it could be either the hot tap water valve or the
DI)
3. Inspect fill valve for blockages or sticking solenoid valve plunger.
4. Test electrical functionality of valve.
5. inspect hoses for blockages
6. Replace the valve if it will not open, or if it has no resistance
across the two terminals.
7. repeat diagnostic check
Pressure Switch Adjustment
The pressure switch is located on the back of the washer beneath the
insulation jacket. There are four red screw sockets located on this switch,
two above the row of electrical nodes and two below. The top socket on the
bottom pair controls the level of fill (Fig 2B).
1. Carefully remove the insulation jacket from the back of the machine.
2. Locate the pressure switch.
3. Using a Phillip’s screwdriver, adjust the fill control (red socket) by
giving it a ¼ to ½ turn to the left (counter clock-wise) to lower the
water and right (clock-wise) to raise the level.
NOTE: If you adjust either of the contacts also adjust the other screw the
same amount of turns to keep the proper distance between them.
4. Repeat Diagnostic check and advance accordingly.
5. Adjust/Replace Pressure switch as necessary
Overfill Alarm
This displays if the pressure switch’s initial fill contact does not
trigger. The water level will then switch the overfill contact as an
emergency shut off before the tanks is flooded and leaks out the door.
The Alarm will shut off the fill and message the display. The Alarm
is canceled by opening the door.
Inspect the Sump Screen:
Look at the sump screen in the bottom of the tank. It should have a 1/8 inch
hole drilled into it. If it doesn't, use a 1/8" drill bit and put a hole as
Figure 2:
Fill Pressure Switch: The pressure
switch has replaced the traditional float
switch.
(A) Red Arrow: Adjustment slot for the
overflow/overfill contact. Turning it
clockwise raises the level at which it
switches off, counter clockwise lowers
it.
(B) Blue Arrow: Adjustment slot for the
initial fill. Turning it for changes is the
same as above.