Trouble Shooting - EMS 1304 Installation And Operation Manual

Trouble Shooting

Problem
Control unit reads 100%, both bargraphs are
blinking, Alarm LED is on, Fault message
T2 4-20mA lost/low, service module meter
in T2 reads -20 or higher.
Alignment is good but control unit reads
high opacity or erratic in normal, zero &
span mode, service module meter in opacity
reads high or erratic.
Control unit reads High, zero/span values
are OK
High dust alarm and /or cal fail cal message Transceiver window
Control unit reads High, zero/span values
are OK, alignment is good
Air purge fault message
No stack power fault message
Possible Cause
Transceiver current loop
to the control unit is open
1- Reference voltage TP-2
on signal processor 1667
is lower than 9.3V
2- Main lamp out
1- Smoke
2- Alignment is out
and/or zero mirror is dirty
Dirt built up in flanges
No or low air flow
Service module lost power
or failed
40
Remedy
Operate/test switch must be in
Operate.
Check wiring for open from
Terminal 17 & 18 on control unit to
terminal 17 & 16 at service module
location.
1- Adjust lamp drive PT-2 on the
power modulator 1668 until
Reference voltage TP-2 on signal
processor 1667 is 10.0 Volts.
2- Replace main lamp assembly
1- Correct process
2- Adjust alignment until centered
on target.
Clean window and or zero mirror
Swing open transceiver & Retro.
Clean flanges with push rod.
Replace air blowers as necessary
Replace air filters as necessary
Tighten hose clamps as necessary
Check power, check SM fuse.
Replace as needed