Robinair 16900 Refrigerant Identifier - Manual (Page 21)

16900 Refrigerant Identifier 19
AIR DETECTION SENSOR REPLACEMENT
Inspection Frequency: The Identifier informs the user of possible air
detection replacement requirements by displaying AIR SENSOR FAULT.
Air Detection Sensor Replacement Procedure:
Refer to Error Codes and Corrective Actions, and try each suggested
action. If the instrument still shows the error code, the air detection
sensor needs to be replaced.
1. Power down the instrument, and remove the sample hose from the
instrument sample inlet port.
2. Remove the sample filter, and unthread the two screws located on
the filter retainer clip.
3. Turn the instrument onto its face, and remove the four large Phillips
head screws from the rear countersunk holes around the outer edge
of the instrument.
4. Remove the instrument case front to expose the internal components.
5. Disconnect the air sensor harness (from circuit board located in front
half of instrument case) by pulling it straight out of the connector.
6. Unthread the air detector sensor from its housing. Discard the spent sensor.
7. Obtain a replacement air detection sensor, Robinair part no. 19712.
Thread it into the housing hand-tight. Verify the o-ring is seated
around the threaded end of the air detector sensor.
8. Route the sensor harness to the circuit board, and plug it into the
sensor harness header of the circuit by pressing it straight in. The
harness is keyed and fits securely in one direction only.
9. Verify the circuit board is correctly positioned onto the mounting
studs of the instrument case.
10. Position the housing halves together, and secure with two small
screws located under the filter location and four large rear screws.
Replace the sample filter onto the instrument.
Maintenance