Why Athena Controller has full output and no control, with the output light always on?
If your Athena Controller has full output with no control and the output light remains on, it could be due to reversed thermocouple connections. Ensure the connections are correct. Another potential cause is shorted T/C lead wires between the thermocouple and the controller. In this case, you should repair or replace the wiring.
What to do if Athena Controller has no output, but step 1 is ok, and the meter nulls at ambient?
If your Athena Controller shows no output, but step 1 is okay and the meter nulls at ambient, it could be due to a missing external backplate jumper (for all models except “S” and “F”). Install the jumper. Alternatively, the relay might be defective; replace the relay if the contacts are worn or dirty. It could also be caused by an open heater or defective heater circuit wiring. Replace the open heater and correct any defective wiring.
How to fix Athena Controller with full output and no control, but the output light goes off and the meter goes upscale?
If your Athena Controller shows full output with no control, the output light goes off, and the meter goes upscale, it is likely that the relay contacts are welded closed. Check the resistance reading; if it's near 0 ohms, replace the relay.
What to do if Athena Controller is dead with no output light and no meter deflection?
If your Athena Controller is dead, showing no output light and no meter deflection, first ensure that there is line voltage input and restore power if necessary. If power is present, there may be an open PC board to back-plate connector (defective connector) or an open power transformer. Replace either the power transformer or the backplate connector.
What to do if Athena Controller has no output, the meter reads full scale positive, and there is no heat?
If your Athena Controller shows no output, the meter reads full scale positive, and there is no heat, the issue is likely an open thermocouple or T/C wiring. Replace the thermocouple and correct any defective wiring.
General| Input Types | Thermocouple, RTD |
|---|---|
| Output Types | Relay |
| Control Modes | PID, On/Off |
| Alarms | Deviation |
| Display | LED |
| Power Supply | 100-240 VAC |
| Communication | RS-485 |
Diagnoses issues related to a non-responsive controller or lack of output.
Troubleshoots scenarios with no output and meter reading null at ambient conditions.
Addresses issues of no output with the meter displaying a full-scale positive reading.
Solves problems of full output with the output light remaining on.
Diagnoses full output where the output light turns off and the meter goes upscale.
Investigates why process temperature differs from setpoint or stabilizes incorrectly.
To Next Page
