Sierra INNOVA 215 - Manual (Page 30)

IM-215 Rev-A.1 Series Innova-Switch™ Page 30 of 42
6.0
INTENANCE AND TROUBLE SHOOTING
6.1
Cleaning
The switch can be cleaned by soaking, spraying solvents or detergent-and-water onto
the sensor tubes, or by ultrasonic cleaning.
Lime deposits can be safely removed by soaking in 20% hydrochloric acid. Warming
to 150°F is permissible to speed this process. The acid must be thoroughly rinsed off
once cleaned.
For unusual cleaning problems, call SIERRA INSTRUMENTS and determine the
exact materials of construction and chemical compatibility before using strong acids
or unusual cleansers.
**IMPORTANT**
DO NOT SANDBLAST OR ABRASIVE CLEAN THE SENSING
PROBES. THE SENSING PROBES COULD BE DAMAGED BY
ABRASIVES.
6.2
Troubleshooting
6.2.1
Power and Continuity Verification
1. Turn power off to the Innova-Switch ™ .
2. Remove the instrument enclosure cover (ccw).
3. Loosen the two PC captive screws (see Figure 4.0 for location).
4. Unplug the PC board from the instrument enclosure by pulling straight out on the
transformer.
5. Reapply power and verify correct voltage at pins 7 (positive for DC) and 8
(negative for DC) of TBB (see Figures 6.0 or 7.0).
6. If voltage is correct, verify the fuse (F1) on the PC board is not blown (See Figure
8.0). If fuse is not blown proceed to 6.2.2.
7. If fuse is blown replace with appropriate value (See 7.0 Specification).