Despatch Protocol Plus Controller (Heat/Cool) - Manual (Page 36)

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Error Messages and Alarms
The Alarm Status Hi-limit LED is flashing. This indicates a problem with the
thermocouple, or the Hi-limit setpoint has been exceeded. Once the problem has
corrected, press the Reset pushbutton.
The Alarm Status Soak LED is flashing. This indicates that the oven temperature has
not entered or dropped out of the soak band and the soak timer has stopped.
The top LED Display reads OPEN. This indicates that either the Control or the Hi-limit
thermocouple is disconnected or broken. The lower LCD display should indicate which
thermocouple is the problem. Repair or replace the thermocouple.
The lower LCD display reads CONTROL SENS ERR. This indicates that the Control
thermocouple is disconnected or broken. The upper LED display should indicate OPEN
showing a thermocouple problem. Repair or replace the thermocouple.
The lower LCD display reads HI-LIM SENS ERR. This indicates that the Hi-limit
thermocouple is disconnected or broken. Repair or replace the thermocouple.
The lower LCD display reads HIGH LIMIT ALARM. This indicates that the Hi-limit
temperature setpoint has been exceeded. Determine if the setting is set too close to the
setpoint, the SSR is defective, or the calibration is incorrect.