TROUBLESHOOTING/ Monitor Unit Change Interval Settings IMPORTANT: Change interval can only be set when maintenance information dis- play is set to ON. 1. Select change interval by using keys 1 and 2. 2. Set time for change interval by using keys 3 and 4. 3. Select remaining hours by using keys 1 and 2 and push the confirm key. 4. The message "Adjust remaining hours to new change interval. OK?" appears. Then, push the confirm key. 5. Push key 6, and the primary screen appears. Key 1 T1V5-05-01-052 Key 2 Key 3 Key 4 Interval ON/OFF Setup Screen Key 1 T1V5-05-01-138 Key 2 Confirm Key Key 6 Confirm Key T1V5-05-01-139 Menu Key Primary Screen T1V1-05-01-123 T5-2-58