Shellab SWB30-2 - Manual (Page 13)

13 Microprocessor Control Water Baths
TROUBLESHOOTING
Should the unit malfunction, use this section to determine the problem and resolution. Troubleshooting
topics include:

Temperature

Miscellaneous
Warning : Troubleshooting procedures involve working with high voltages that can cause injury or death.
Troubleshooting should be performed only by trained personnel.
Avertissement: Les procédures de diagnostic des problèmes impliquent de travailler sur des composants
sous tension et par conséquent un risque de blessure ou de mort par électrocution. Le
diagnostic des problèmes doit être confié exclusivement à des personnes qualifiées.
Temperature Troubleshooting
Problem Possible Cause Solution
Temperature too high
Insufficient
quantity of water.
Fill bath a minimum of three-fourths (3/4) full with water.
Main controller set
too high
See Setting Main Temperature Control
Main controller
failed on
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 and then settles to set
point.
Calibration issue Recalibrate.
Temperature is too low
Over Temperature
Limit is set too low.
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.
Main controller
failure
Confirm with front panel lights that controller is calling for heat.
Display reads "LO" but heating
all the time
Control failure Call customer service.
Unit will not heat over a
temperature that is below set
point
OTL has activated.
Confirm that set point is set high enough and that the Over
Temperature Safety is not activated.
Temperature
calibration is not
correct.
Check calibration. Using independent thermometer, follow
instructions in Calibration.
Section
8