16
If you have problems using the unit, follow these general procedures to track down the cause from the symp-
toms you are experiencing. If an error message appears on the display, refer to the specific error in this chart.
If the problem is not resolved using the table below, contact Technical Support at 1-800-553-0039.
Problem
Possible Cause
No power indication
Unit not plugged in; no power at the outlet; incorrect power (make
sure outlet matches label on back of unit); defective power cord;
defective power switch or fuse (s) (call Technical Support).
No heating
Setpoint or backup not set properly; defective heater or controller
(call Technical Support).
Always heating
Defective controller (call Technical Support).
Very slow heating of samples
Empty tank or extremely low liquid level in tank (add liquid to the tank
to improve heating).
Unit heating up slower than
Defective controller (call Technical Support).
normal
Alarm light on constantly
Setpoint or backup not set properly; defective primary controller
(call Technical Support).
Display not correct
Temperature F or C set in error; temperature not calibrated (perform
calibration procedure with thermometer); defective controller
(call Technical Support).
Erratic operation
Broken internal electrical connection; defective heater or controller
(call Technical Support).
Error Message: E1
Failure of temperature sensor or controller (call Technical Support).
Error Message: E2
Failure of controller (call Technical Support).
Display shows LLLL at power-up
Wrong voltage; controller not set up properly (call Technical Support).
Troubleshooting
Summary of Contents for Precision WB159910-33
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