7-2
MEGA3 NFPA Medical Gas Notification System
4107 9016 59.03
Symptom
Possible Cause
Corrective Action
Area Display pressure/
vacuum reading not
matching pipeline.
Bad gauge on pipeline
Verify gauge used on pipeline
Incorrect unit of measure
Check unit of measure, if incorrect, repro-
gram unit of measure.
Gas sensor out of calibration
Adjust Zero Offset to correct reading.
(Note: there is a max of 3 psi / 3 “hg offset
adjustment). If sensor cannot be adjusted
enough, replace sensor.
High or Low alarm, with
normal pressure display-
ing on Area display
Alarm set points have been changed.
Verify / correct alarm set points.
Screen is blank, power on
LED is illuminated
Screen backlight will time out and
shut off. Motion sensor will awaken
screen when motion is sensed within
5 ft of screen.
If screen does not awaken when approach-
ing alarm, touch screen to awaken. Possible
bad motion sensor.
Audible alarm reactivates
a short period of time
after Silence button has
been pressed
A new alarm condition has occurred.
If alarm condition previously silenced,
self corrects and then reactivates again,
the alarm panel treats this as a new alarm
condition.
Troubleshooting (continued)
