Beacon MEGA - Page 48

48
Part No. 6-847681-00 Rev. D
Symptom Possible Cause Corrective Action
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9. Digital display module LCD
is blank or erroneous
characters are displayed
while other indicators are
functioning correctly.
a. Faulty display chassis. a. Replace display chassis.
10. Low pressure or vacuum
alarm with -F 1- display on
digital display module LCD.
No pressure or vacuum signal
to the display chassis as a
result of:
a. Field wiring disconnected.
b. Field wiring polarity
reversed.
c. Wiring connection at
interconnect board not
made.
d. Sensor module not
connected to field wiring.
e. Faulty sensor module.
f. Display chassis is faulty.
g. Faulty interconnect board.
a. Complete wiring.
b. Check wiring polarity.
c. Check wiring connections at
interconnect board SENSOR INPUT
or DATA INPUT terminal.
d. Confirm wiring connections at
sensor.
e. Replace sensor.
f. Replace display chassis.
g. Replace interconnect board.
11. Low pressure or vacuum
alarm activated with -F2-
display on digital display
module LCD.
a. No line pressure or vacuum
in pipeline.
b. Faulty sensor module.
a. Pressurize or pull vacuum on piping.
b. Replace sensor.
12. High pressure or vacuum
alarm with -F3- display on
digital display module LCD.
a. Short in field wiring from
sensor.
b. Faulty sensor, interconnect
board or display chassis.
a. Check wiring for short.
b. Disconnect sensor input wires from
interconnect board. If display
changes to -F 1- then sensor is
faulty. If it remains -F3- then
interconnect board or display
chassis are faulty. Replace as
necessary.
13. Remote computer signals
not being relayed when
signal switch is opened or
closed.
a. Field wiring disconnected.
b. Relay not held closed during
normal operation (faulty
relay on module).
a. Complete wiring.
b. Replace module as necessary.