Labconco SteamScrubbe & FlaskScrubbe Glassware Washers 44204 Series User Manual
Page 44
Labconco Glassware Washer Service/Technical Manual
38
Checking the function of the Sump Heater
1. Remove the front paneling as described in “Removing the Toe/Kick
Panels” in Section I.
2. Locate the power supply cords and place an Ammeter around the power
supply wiring.
3. Go to Diagnostics (as described in “Accessing the Diagnostic Mode” in
Section I) and use the ▼ button until “HEATER” is highlighted. Press ◄
or ► button and the heater will be energized.
4. With the heater on the Amps should measure between 9.3 & 11.5 for 115V
machines and 7.8 & 9.6 for the 208/230V units.
5. If the measurement is outside of these ranges, and greater than “0”,
check the resistance of the Heater. Replace the Heater Element as
described in “Replacing the Heater Element” in Section IV.
6. Repeat steps 1-5 if you replaced the heater.
7. If the amps are correct, continue to the next section.
Checking the Calibration of the Probe
1. Open the door
2. Position a thermocouple (temperature reader) near or on the temperature
probe.
3. Close the latch by sliding it to the right.
4. When the opening screen is displayed, Press and hold the ◄ button.
5. The display should agree with temperature meter ±2°C.
6. Record Readings
a. Temperature Probe _____________ Washer Probe ____________
7. Proceed to the next section.
NOTE:
If the temperatures do not match and the amp reading is 0, check for
loose wires at the heater connection. If there is voltage to the heater,
check for resistance across the heater. If open or zero, replace the heater.
The theoretical resistance across the heater (not hooked up) should be around
12 ohms for the 120v and 26 ohm for 230v.
Checking the Probes Wiring
1. Lift the back flap of the Insulation Jacket and find the temperature
probe [Fig 13b].
2. Follow the wire to where it connects to the red and white wire
connector from the Base Wiring Harness [Fig 13c].
a. Inspect the connection and repair or reconnect as necessary.
Figure 12
Left: The Temperature
Probe (A) is bolted to the
tank and can be found on
the lower right back
panel of the glassware
washer. Below that is the
Sump Heater Element. It
may be necessary to
replace either or both of
these parts depending on
the findings of this
diagnostic procedure.