Pressura RPM10 Operation And Service Manual page 76

Symptom Possible Cause
Sensor does not Incorrect
calibrate. pressure sensor
address.
Sensor
communications
not working.
Pressure Problem with
sensor red LED sensor (slow
is blinking uniform blink).
(Figure 18).
Communication
(fast burst of
non-uniform
blinking).
Red LED is
constantly on.
Incorrect
DIM always
pressure sensor
displays 0.200
output.
inches H O.
2
DIM displays Sensor direction
opposite is incorrect.
pressure signal.
68
Corrective Action
Rm1 pressure sensor must have address of 1. Anteroom
sensor must have address of 2. Rm2 sensor must have
address of 3. Check pressure sensor DIP switches 5 & 6
and verify address is correct (7 to 12 must be OFF).
Figure 18: Pressure Sensor DIP Switch
Check SENSOR STAT item in diagnostics menu. If
NORMAL is displayed, sensor is okay. If COMM ERROR is
displayed, check wiring, pressure sensor address, and that
DIP switch 1 & 2 are ON (Figure 18).
Check SENSOR STAT and confirm NORMAL is displayed.
If ERROR is displayed, correct error.
Unit is communicating with DIM. This is normal.
This is normal when no problems exist or when no
communication is occurring.
Pressure sensor must be set for 0 to 10 volt output, not
4-20 mA (do not confuse this output with DIM analog
output). Check pressure sensor DIP switch 3 and make
sure it is OFF (see Figure 18).
Pressure sensor must have DIP switch correctly set for
proper sign display. Verify DIP switch 4 is ON when sensor
is mounted in isolation room (controlled space), and OFF
when sensor is mounted in reference space (see
Figure 18).
Part Two