2000-OSM, F1 6-15
On Manual Temperature Zone (#) (flashing)
Control Mode Screen *Temp Bd Alarm* (flashing)
On Alarm Screen Temperature Board:
*Zone Specific
*** TEMP ZONE (#) Alarm ***
*Triac Failure
Cause
: The output of the triac is connected to the zone heater(s). An optical isolator connected
parallel to the output senses the firing of the triac(s) as heat is applied to the heater(s). This output is
monitored by the Temperature Control board. If the triac does not conduct when the gate signal is
applied, the triac is diagnosed as failed. Problem could be associated with triac monitoring optical
isolators on output board, or an open heater element.
CAUTION
It is the customer’s responsibility to ensure that the area is safe and and hazard-
free, and will remain so the entire time the analyzer is open. This responsibility
includes ensuring adequate ventilation in analyzer shelter and obtaining proper
work permits, etc.
See "AIR PURGING" in Section 4 for the override function. Do not perform
override until you have read Section 4 completely and you understand and can
perform the procedure requirements.
Perform Test Procedure 26 (Open or Shorted Heater) to check for shorted heater.
Replace Heater Output Board.
T-Rating Disagreement
Symptom
: The temperature board has shut down and all the LEDs are off. The zone temperatures
are reducing and will approach ambient. The T-Rating display is alternating between the two jumper
settings.
Any one of the following alarm messages or conditions could be present:
On Background Screen ***ALARM:*** (flashing)
On Manual Temperature *Temp Bd Alarm* (flashing)
Control Mode Screen
On Alarm Screen Temperature Board:
*T-Rating Disagreement
*Analysis Shutdown
possible Zone specific
*Reasonableness Test
If the T-Rating is in question, refer to final documentation provided with the chromatograph or contact
the ABB Service Department.
Remedy
: The T-rating jumpers for Micro #1 and Micro #2 must be set up identically. Determine the
correct setting and configure the jumpers for both identically.
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