Interpreting Warning Messages - Teledyne 400E Instruction Manual

TROUBLESHOOTING & REPAIR PROCEDURES
4. SUSPECT A LEAK FIRST! Data from T-API's Service Department indicates that
50% of ALL problems are eventually traced to leaks in the pneumatic
connections and gas lines of the analyzer itself, the source of Zero Air or Span
Gases or Sample Gas delivery system.
Check for gas flow problems such as clogged or blocked intern/external gas
lines, damaged seals, punctured gas lines, a damaged pump diaphragm, etc.
5. Follow the procedures defined in Section 10.4 for confirming that the analyzer's
basic components are working (power supplies, CPU, Relay Board, UV Detector
Boards, Keypad, UV Lamp Power Supplies, etc.). See Figure 3-5 for general
layout of compo nents and sub-assemblies in the analyzer. See the wiring
Interconnect Drawing and Interconnect List, documents 04396 and 04406.

11.1.1. Interpreting Warning Messages

The most common and/or serious instrument failures will result in a warning
message being displayed on the front panel. Table 11-1 lists warning messages,
along with their meaning and recommended corrective action.
It should be noted that if more than two or three warning messages occur at the
same time, it is often an indication that some fundamental analyzer sub-system
(power supply, Relay Board, Motherboard) has failed rather than indication of the of
the specific failures referenced by the warnings. In this case, it is recommended
that proper operation of power supplies (see Section 11.5.2), the Relay Board (see
Section 11.5.5), and the A/D Board (see Section 11.5.6) be confirmed before
addressing the specific warning messages.
The analyzer will alert the user that a Warning Message is active by displaying the
keypad label MSG on the Front Panel. In this case the Front panel display will look
something like the following:
SAMPLE
<TST TST>
The analyzer will also alert the user via the Serial I/O COM port(s) and cause the
FAULT LED on the Front panel to blink.
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RANGE=500 PPB
CAL
Model 400E Ozone Analyzer
Instruction Manual
O3 = 0.0
MSG
CLR SETUP
P/N 04316 Rev: B