Earth Klear Sky 400, Owner'S Manual, Page: 44 / 57

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This alarm indicates that the thermocouple under range.
Try the following operations to isolate the problem:
Manually inspect yellow cable for breaks or shorted
connections.
Disconnect the Thermocouple plug at the stack and restart.
Disconnect the yellow cable from the IBC and restart. If
the Over-range error below occurs then the board is
working properly.
Cycle the Power to Recover.
Post Cat. Thermocouple Sensor Over-range:
Alarm/Alert LED flashes 4 times and then Alarm/Alert
LED off for 1 second
This alert indicates that the thermocouple is not connected at
the plug or at the controller board.
•
Check to see if Thermocouple is connected.
•
Manually inspect yellow cable for breaks or shorted
connections.
•
Check for ~5.0V across the terminal block.
•
Cycle the Power to Recover.
Alarm/Alert LED flashes 5 times and then
Alarm/Alert LED off for 1 second
This alarm indicates that the water jacket temperature is very
low.
•
Check to make sure the water jacket is not frozen.
•
Check for disconnected sensor wire.
•
Cycle the Power to Recover.
Alarm/Alert LED flashes 6 times and then Alarm/Alert
LED off for 1 second and Lockout LED on
continuously
This alarm indicates that the water temperature is over-