Clearing a Thermocouple (TC) Fault Alarm
The TC Fault alarm is a non-adjustable alarm. Its main purpose is to alert the operator that while a heater was on,
the controller lost feedback from the thermocouple. When a TC Fault alarm is generated, the controller immediately
switches off both heater outputs until the alarm is cleared.
This alarm occurs when the unit is enabled, a heater channel is turned ON, and the controller does not detect a
correct thermocouple reading from the corresponding heater channel that is actively ON.
NOTE:
The ACT field on the HEATERS screen displays “----” when the controller does not detect a correct reading
from the thermocouple.
The most likely causes of a TC Fault alarm are a broken thermocouple wire or incorrect HEATER 1 or HEATER 2 TC
connections.
To Clear a TC Fault Alarm:
1. Check the integrity of the wiring between the thermocouple and the HEATER 1 or HEATER 2 TC connections to
the rear of the controller.
2. Verify that the ACT field on the HEATERS screen is not displaying “----.”
3. On the HEATERS screen, select either ALARM and press ENTER to clear the alarm.
NOTE:
You can also clear a TC Fault alarm by pressing the ENABLE/DISABLE key to disable the controller.
Flashing TC Fault
System Alarm
Clearing Alarms (continued)
ValveMate 9000 Controller
55
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