Trouble Shooting - Emerson OPM4001 Installation And Operation Manual

I N S T R U C T I O N M A N U A L

TROUBLE SHOOTING

Problem
Control unit reads 99%, Alarm icon is on, Fault
message T2 4-20mA FAULT, 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
Control unit reads High, zero/span values are OK,
alignment is good
Air purge icon on in the lower right corner of the Main
Display
No stack power fault message
R E V 4 . 2
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
Transceiver window and/or zero
mirror is dirty
Dirt built up in flanges
No air flow
Service module lost power or
failed
46
Remedy
Service module Operate/test switch must
be in Operate.
Check wiring for open from control unit
AN3 & ACM 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 +/-
0.2Volts.
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