Section V Troubleshooting; Error Codes - Thermo Scientific NESLAB EX Series Installation, Operation And Maintanance Manual

Section V Troubleshooting

Error Codes

On Start Up:
Operational Errors:
Unusual Hardware Conditions
These errors will flash on the display and cannot be cleared. These are internal
controller problems.
Functional/ Machine Errors
Warnings self-clear after the cause of the error is identified and corrected.
Faults require pressing I/0 to clear the error message and then pressing
I/0 again to start the unit after the cause of the error is identified and corrected.
Error Display
ROM checksum. Check with Thermo Fisher
Test failure. Locks up the program
Display board failure. Clears when display board is fixed
Critical checksum failure. Check with Thermo Fisher
Asynchronous communication error, check serial interface
parameters
Bad calibration data entered using Calibration Loop. Redo calibration
through - Interrupt errors during runtime
Synchronous communication error - check connections
BOM invalid. Contact Thermo Fisher
Indication
Low temp setpoint warning/fault, see page 21
Low level warning, fluid below safe operating level
High temp setpoint warning/fault, see page 21
Shorted external temperature sensor (rtd2)
Open external temperature sensor (rtd2)
Shorted internal temperature sensor (rtd1)
Open internal temperature sensor (rtd1)
Fluid low level fault - unit shuts down
High Temp fault - unit shuts down, see page 28
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