Honeywell RP908A Series Service Data page 6

Before troubleshooting the RP908, make a visual
check of the Controller to see that springs and pivots are
connected properly for the application. If the RP908 is
CPA ONLY
CHECK DEVICE
OPERATION.
REPLACE IF
NECESSARY
MEASURE CONTROLLED
V A R I A B L E . C O M P A R E 4
WITH SENSOR 1 GAGE
READING.
REMOTE
CHECK BRANCH
LINE PRESSURE
TEST BRANCH
LINE FOR
LEAKS. REPAIR
IF NECESSARY.
Fig. 8. RP908 Troubleshooting Flowchart.
still not working properly, refer to Fig. 8, RP908
Troubleshooting Flowchart.
CONTROLLER
NOT CONTROLLING
YES
CHECK VALVE OR DAMPER
FOR CLOSEOFF, LEAK, OR
MALFUNCTION. CHECK RF'908
FOR CLOGGED RESTRICTIONS,
FILTERS. SCREENS. SENSOR I
LINE AIR LEAK, BAD SENSOR,
OR GAGE OUT OF CALIBRATION.
CORRECT AS NECESSARY.
I
CHECK OPERATION
LUBRICATE CONTROLLER
PIVOT POINTS. REPLACE
CONTROLLER IF LIBRICATION
DOESN'T HELP
CONTROLLER
ADJUST PRV OR
RECONNECT TO
l
RECALIBRATE
AND RECHECK
TEST TUBING
FOR LEAKS
REPAIR IF
NECESSARY
NOW MATCH
REPLACE SENSOR,
CHECK OPERATION. I
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