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Appendix C
–
Error Codes
24
Appendix C – Error Codes
During normal operation, the system is constantly checking itself for proper operation. If a
failure is detected, the FANs are turned ON, and the unit is put into the ALARM state. The
unit will then operate as follows:
Failed Sensor
o
Shows “- - -” on the display during the time when that sensor value would be
displayed
o
Shows which sensor is bad
o
System continues to function using the remaining input channels
Failed A/D Converter
o
Shows “E11” on all channels
Failed Ambient Temperature Sensor
o
Shows “E22” on all channels
o
Set ambient temperature at 30°C
o
Continue to operate using 30°C ambient
Failed EEROM After Initial Start Up
o
Shows “E33” on all channels
o
Continues to operate
Failed EEROM at Power Up
o
Shows “E33” on all channels
Failed Display Driver
o
Continues to operate
Intermittent Sensor Connection
o
If there is an intermittent sensor, the ALARM and FAN relays will latch ON. During
the time the sensor is open, the display will show “- - -” . During the time the sensor
is closed, it will show b – C (bad connection). Once the problem is resolved, push
the SILENCE button to unlatch the ALARM and FAN relays.
Reversed Thermocouple
o
If a thermocouple is installed with the wires reversed, the temperature reading will
go down as the temperature of the thermocouple goes up. If the thermocouple
temperature is 30°C colder than the temperature inside the unit, the unit will
operate the ALARM and the FAN relay contacts, and the display will show “- - -“.
o
There may be cases where this feature will cause a false alarm. The reversed
thermocouple detection can be turned OFF, as described in Appendix A.
