Error Messages; High Temp/Low Liquid Level Safety - Thermo Scientific ULT-80 Installation & Operation Manual

Error Messages

High Temp/
Low Level Cutout
Error Action
Er00: ROM Checksum
Er01: RAM Test Failed
Er02: Keypad Test Failed
Er04 - Er13: Interrupt Error
Er14: Synchronous Error
Er15: Asychronous Error
Er16: Bad Calibration
Er19: Low Temp Limit
Er21: High Temp Limit
Er23: RTD2 Shorted
Er24: RTD2 Open/Not Installed
Er25: RTD1 Shorted
Er26: RTD1 Open
HTC: High Temperature Cutout
Er52: System Error
NOTE: On start up Er21 is active until the reservoir fluid temperature drops
within 5°C of the circulator's high-end temperature range. Errors 00 through
15 will lockup the controller keypad. Errors 00 through 03 may be cleared by
depressing the NEXT ENTER key.
To protect your application, the adjustable High Temperature/Low Liquid Level
Safety (HIGH TEMP/LOW LEVEL) ensures the heater will not exceed tem-
peratures that can cause serious damage to your circulator. A single tempera-
ture sensor, located on the heater coils in the bath, monitors both conditions.
A High Temperature/Low Liquid Level fault occurs when the temperature of
the sensor exceeds the set temperature limit.
In the event of a fault, the circulator will shut down. The cause of the fault
must be identified and corrected before the circulator can be restarted.
The safety is not preset and must be adjusted during initial installation. To set
the safety, locate the HIGH TEMP/LOW LEVEL SAFETY adjustment dial on
the rear of the pump box. Turn the dial fully clockwise and turn the Power
switch OFF then back ON.
Start the circulator. Adjust the setpoint for a few degrees higher than the
highest desired fluid temperature and allow the bath to stabilize at the tem-
perature setpoint. Turn the HIGH TEMP/LOW LEVEL SAFETY dial counter-
clockwise until you hear a click and the circulator shuts down. The FAULT
LED will light to indicate a fault has occurred.
Cool the bath and then, without moving the adjustment dial, turn the Power
switch OFF then back ON.
NOTE: The safety switch has a temperature range of 7°C to 180°C.
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