BeaconMedaes MEGA 2 Installation, Operation And Maintenance Instructions page 48

Troubleshooting Guide
Symptom
13)Pressure or vacuum digital
display does not match
pressure or vacuum levels
in pipeline.
14)Low alarm with - - F F I I - - display
on digital display module.
15)Low alarm with - - F F 2 2 - -
display on digital display
module.
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Part No. 6-847684-00 Rev. D01
Possible Cause
a. Incorrect digital display "unit
of measure".
b. Faulty digital display module.
c. Faulty sensor module.
No pressure or vacuum
signal to digital display
module as a result of:
a. Sensor wiring disconnected
or wiring polarity reversed.
b. Faulty digital display module.
c. Faulty sensor module.
Pressure or vacuum signal
to digital display module out
of measurement range (too
low) as a result of:
a. No pressure or vacuum in
pipeline.
b. Faulty digital display module.
c. Faulty sensor module.
Corrective Action
a. Use digital display module test mode
as described on page 41 to check
current unit of measure (PSI, in Hg,
kPa, mm Hg). If incorrect, reprogram
unit of measure. Refer to Set-Up
instructions pages 35 through 40.
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 correct reading, replace
faulty digital display module.
c. If test module in step b above also
gives incorrect display, replace faulty
sensor module.
a. Correct sensor wiring. If sensor is
mounted remotely, verify field wiring
continuity and polarity from sensor to
digital display module connector pins
5 (+) and 6 (-).
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 I I - -
, replace faulty digital display module.
c. If test module in step b above also
gives - - F F I I - - , replace faulty sensor
module.
a. Apply appropriate pressure or
vacuum to pipeline.
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 2 2 - - , replace faulty digital display
module.
c. If test module in step b above also
gives - - F F 2 2 - - , replace faulty sensor
module.