6-18 2000-OSM, F1
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:
*Overtemp Test Fail*
possible zone specific Triac failures
Cause
: Temperature control did not detect over-temperature condition when tested.
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.
Remedy
: The over-temp micro has possibly failed, may require replacement of temperature control
board or output board.
Controller Housing Internal Temperature Greater Than 80 Degrees C
Symptom
: The temperature board has shut down and all LED’s on temperature controller board are
off. Actual temperatures are reducing, approaching ambient. Alarm condition present.
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:
*Ambient Limit Exceeded
Cause
: The controller housing temperature is monitored to ensure that the temperature does not
exceed 80° C. This is done to protect the associated heater electronics from high temperature
operation. Excessive temperatures could cause electronics failure and runaway zone temperature
control.
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.
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