- When setting the column temperature on the Alliance or setting up your inlet method in Empower/MassLynx, the error message "Column temp H/W fault (7)" comes up and you cannot set the temperature
- Alliance HPLC System
- 2695 Separations Module
- 2795 Separations Module
"Column temperature h/w fault (7)" indicates that the column heater/cooler electronics have signaled an internal power failure.
FIX or WORKAROUND
- Ensure that the column heater/cooler is plugged in and turned on. There is an on/off switch on the lower-right side of the column oven.
- If the error persists, you can contact Waters via iRequest to request an on-site visit to help you troubleshoot. The power supply most likely needs replacing.