Shellab SWBR27-2 - Manual (Page 15)

Reciprocating Water Bath 15
TROUBLESHOOTING
Should the unit malfunction, use this section to determine the problem and resolution. Troubleshooting
topics include:

Temperature

Mechanical

Other
Table 3. Temperature Troubleshooting
Problem Possible Cause Solution
Temperature too high
Main controller set too high See Setting Main Temperature Control
Main controller failed on Call customer service.
Wiring error Call customer service.
Display reads "HI" or "400"+
Probe is unplugged Call customer service.
Probe is broken or wire to the
sensor is broken.
Call customer service.
Temperature spikes over set
point then settles to set point.
Calibration issue
Recalibrate. See Calibrating the Main
Temperature Control.
Temperature is too low
Over Temperature Safety is set
too low.
See Setting the Over Temperature Safety
Thermostat.
See Setting Main Temperature Control.
Bath temperature not recovered
from water being added.
Wait for display to stop changing.
Unit not recovered from power
failure or being turned off. Bath will need a minimum of 2 hours to warm up
and stabilize.
Element failure Compare current draw to data plate.
Main controller failure
Confirm with front panel lights that controller is
calling for heat.
Over Temperature Safety failure
Confirm with Safety light that Thermostat is
operating correctly.
Wiring problem
Check all functions and compare wiring to the
wiring schematic, especially around any areas
recently worked on.
Loose connection Call customer service.
Display reads "LO" but heating
all the time
Control failure Call customer service.
Display reads “LO” and not
heating
Sensor plugged in backwards Call customer service.
Unit will not heat over a
temperature that is below set
point
N/A Confirm that amperage and voltage match data
plate.
N/A Confirm that set point is set high enough and that
the Over Temperature Safety is not activated.
Section
8