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Instruction Bulletin
Appendix E Rev. 4.6
May 2005
E-4 Appendices Rosemount Analytical Inc. A Division of Emerson Process Management
World Class 3000
IFT 3000 TROUBLESHOOTING
E-3 OVERVIEW
The IFT troubleshooting section describes how
to identify and isolate faults which may develop
in the IFT.
Install all protective equipment covers
and safety ground leads after trouble-
shooting. Failure to replace covers
and ground leads could result in seri-
ous injury or death.
E-4 IFT TROUBLESHOOTING
IFT troubleshooting is achieved by determining
the functional status of the microprocessor
board and interpreting status displays on the
front panel.
a. Microprocessor Status LED
The microprocessor board includes an LED
to aid in isolating equipment faults. LED in-
dications are as follows:
1. LED OFF. IFT failure, or power is re-
moved; refer to Troubleshooting Flow-
chart #1 (Figure E-3).
2. LED ON - STEADY. Heater system
failure; refer to Troubleshooting Flow-
chart #2 (Figure E-4).
3. LED ON - FLASHING. Microprocessor
normal.
b. Equipment Status (LCD) Displays
The status line of the GUI will display one
system status display (one at a time) in
priority sequence, as indicated in the fol-
lowing list. To troubleshoot an equipment
fault, refer to COMPONENT FAILURE indi-
cations applicable to the display message
(SYMPTOM) in Table E-2.
1. Off - The probe has been turned off
because the IFT cannot control the
heater temperature.
2. Param - IFT has been unlocked using
the user’s password.
3. Serv - IFT has been unlocked using
the service password.
4. PrbEr - The probe is disconnected,
cold, or leads are reversed.
5. HtrEr - If HtrEr is displayed, there is a
fault within the heater system.
6. InCal - If InCal is displayed, the system
is currently undergoing calibration.
7. LowO
2
- If LowO
2
is displayed, the O
2
value is below the low alarm limit.
8. HiO
2
- If HiO
2
is displayed, the O
2
value is above the high alarm limit.
9. NoGas - If NoGas is displayed, there is
no calibration gas pressure.
10. CalEr - If CalEr is displayed, an error
was detected during the calibration
process.
11. ResHi - If ResHi is displayed, the cell
resistance is above the high limit.
12. OK - If OK is displayed, the system is
operating normally.