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OUTPUT TIMEOUT
This error condition will stop control. It is caused by the output (either relay or analog) being activated for longer than the programmed
Time Limit.
Possible Cause
Corrective Action
The process went further out of control than normal.
Increase time limit or reset timer.
The chemical supply has run out.
Replenish the chemical supply.
The pump or valve or supply line is faulty.
Repair or replace the control device.
Wrong chemical is being controlled.
Replace with correct chemical.
The sensor is not responding to changes.
Replace sensor. Evaluate mixing or recirculation.
RANGE ALARM (for sensor inputs)
It indicates that the signal from the sensor is out of the normal range. This error condition will stop control of any output using the
sensor. This prevents controlling based upon a false sensor reading. If the temperature sensor goes into range alarm, then the controller
will go into manual temperature compensation using the Default Temperature setting.
Possible Cause
Corrective Action
Sensor wires shorted
Disconnect short
Faulty sensor
Replace sensor
Faulty controller
Replace or repair controller
EVENT SKIPPED ALARM
An event skipped alarm is set when a second timer event occurs while one event is still running. An event skipped alarm is also set when
the timer relay never turns on during an event because of an interlock condition. The alarm is cleared when the relay is next activated
for any reason (the next timer event or HAND mode or “activate with” force on condition).
Possible Cause
Corrective Action
Incorrect programming
Reprogram to eliminate overlapping events
Long duration interlock condition
Normal operation
SENSOR FAULT
This error indicates that the signal from the sensor is no longer valid at all. This error condition will stop control of any output using
the sensor.
Possible Cause
Correction Action
Sensor wires shorted
Disconnect short
Faulty sensor
Replace sensor
Faulty controller
Replace or repair controller
INPUT FAILURE
This alarm indicates that the sensor input circuit is no longer working, or that one of the inputs used to calculate a virtual input is in a
Sensor Fault condition. This error condition will stop control of any output using the input.
Possible Cause
Correction Action
Faulty controller
Replace or repair controller
If using virtual inputs, sensor fault of one of the inputs
See Sensor Fault troubleshooting above
BATTERY POWER LOW
This alarm indicates that the battery which holds the date and time in memory is below 2.4 VDC.
Possible Cause
Correction Action
Faulty battery
Replace battery
SYSTEM TEMP LOW
This alarm indicates that the temperature inside the controller is below -10 °C.
Possible Cause
Correction Action
Low ambient temperatures
Provide heat for the controller
SYSTEM TEMP HIGH
This alarm indicates that the temperature of the controller or sensor processor IC is above 75 °C, or that the temperature of the Eth
-
ernet card processor IC is above 85 °C.
Possible Cause
Correction Action
High ambient temperatures
Provide cooling for the controller
High power draw
Do not use the controller’s 24VDC to power more than 1.5W total
