: Indicates a "control unit malfunction," which may require resetting the furnace or replacing the internal battery. Quick Programming Guide To set a program on the membrane keypad: Select Program and enter the desired program number. Set Temperature to enter the high temperature. Adjust Times for holding time (default is 1 minute) and for closing time (default is 30 seconds). Vacuum Settings
Often occurs after a battery change; may require parameter reset or technician service. Pros & Cons
Turn the power switch back on. If an error code persists immediately upon boot-up, consult your manual's error code index to identify whether it indicates a specific board failure or a blown internal fuse.
: Features the keyboard and digital display for managing firing programs.
: Indicates a "control unit malfunction," which may require resetting the furnace or replacing the internal battery. Quick Programming Guide To set a program on the membrane keypad: Select Program and enter the desired program number. Set Temperature to enter the high temperature. Adjust Times for holding time (default is 1 minute) and for closing time (default is 30 seconds). Vacuum Settings
Often occurs after a battery change; may require parameter reset or technician service. Pros & Cons
Turn the power switch back on. If an error code persists immediately upon boot-up, consult your manual's error code index to identify whether it indicates a specific board failure or a blown internal fuse.
: Features the keyboard and digital display for managing firing programs.