BeaconMedaes MEGA 2 Installation, Operation And Maintenance Instructions page 49

Troubleshooting Guide
Symptom
16)High alarm with - - F F 3 3 - -
display on digital display
module.
17)High and low alarm with
- - F F 4 4 - - display on digital
display module.
18)No blinking LED on digital
sensor module.
19)Fast blinking LED on digital
sensor module.
Possible Cause
Pressure or vacuum signal
to digital display module out
of measurement range (too
high) as a result of:
a. Shorted sensor wiring.
b. Faulty digital display module.
c. Faulty sensor module.
Gas/vacuum service
mismatch between digital
display module and digital
sensor module as a result
of:
a. Sensor wired to wrong digital
display module.
b. Digital display module
programmed with the wrong
service.
No power to digital sensor
due to:
a. Faulty wiring.
b. Faulty digital sensor module.
Sensor out of range:
a. Vacuum digital sensor
module connected to
pressure service.
b. Pressure digital sensor
module connected to
vacuum service.
c. Faulty digital sensor module.
Corrective Action
a. Correct sensor wiring.
b. If alarm panel contains another
working digital display module,
remove field wiring connector from
suspect module and connect to
working (test) module. If test module
provides any reading other than
- - F F 3 3 - - , replace faulty digital display
module.
c. If test module in step b above also
gives - - F F 3 3 - - , replace faulty sensor
module.
a. Correct sensor wiring.
b. Program digital display module for
the correct gas/vacuum service.
Refer to Set-Up instructions page 36.
a. Correct sensor wiring.
b. Replace digital sensor module.
a. Verify piping connections. Vacuum
sensor maximum overpressure: 30
psi.
b. Verify piping connections.
c. Replace digital sensor module.
Part No. 6-847684-00 Rev. D01
49