Error Message:

HEAD: case temperature low warning, <temperature> C

Applies to:

• Thermal

Service Information:

Every thirty seconds, the thermal head firmware reads the case temperature and compares the reading to a threshhold.

For air-cooled thermal heads ( either head NVS parameter casehigh or caselow is zero; but not both ), the threshhold is hardcoded to 15 degrees C. If the threshhold has been exceeded, this error message is provided for informational purposes only.

For water-cooled thermal heads ( neither head NVS parameter casehigh or caselow is zero ), the threshhold is determined by the NVS parameter caselow. If the threshhold has been exceeded, this error message is provided to disable the chiller and for informational purposes.

This error code applies to Thermal Head firmware version 1.30 and above.

Operator Action:

No action is required; this message is for informational purposes only.

Cause:

• The thermal head is getting cool.

See Also:

• NVS: head casehigh
• NVS: head caselow