Error Message:

HEAD: thermal head humidity alarm, <humidity> percent

Applies to:

• Thermal

Service Information:

Every thirty seconds, the thermal head firmware reads the humidity sensor and compares the reading to the threshhold configured by the head NVS parameter humidity. If the threshhold has been exceeded, the thermal head is shutdown and any plot in progress is aborted.

Setting the head NVS parameter humidity to zero disables the humidity check.

The humidity sensor is only available on some heads. Issue the command "head version" and note the line "PHC hardware version". If the "PHC hardware version" >= 3, the thermal head has a humidity sensor.

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

Operator Action:

Call service.

Cause:

• Verify the humidity of the environment local to the machine.

See Also:

• NVS: head humidity