INDELAC CONTROLS 22018-DH, Installation, Operation & Maintenance Manual

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PART #22018-DH - High-Resolution Positioner
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to 20mA. The new setting is saved when the MODE button is pressed, which also selects the AUTO
mode.
FAULT INDICATORS:
The DHC-400 detects various fault conditions that prohibit the unit from controlling the actuator. A
combination of the three Fault indicators (red, yellow, and green) will turn on or flash to indicate a
specific detected fault. If an appropriate relay option module is installed, the Fault relay output on
the option module will turn off (indicating a fault) when any of the Fault indicators turn on or flash. A
communications option module can also read the specific conditions causing a fault. Note that a
fault condition DOES NOT disable the motor outputs when manually controlling the actuator with
the adjust buttons; while useful for troubleshooting, care should be exercised when operating the
motor under a fault condition. The OVERRIDE mode can also operate the motor when a fault
condition exists - see OVERRIDE MODE for details.
Note that the indicators may not indicate all the fault conditions that may exist. This means that
when the indicated fault is corrected, the unit may display another fault that has not been corrected.
The table below provides a summary of the Fault indications which is followed by a description of
each fault.
RED YEL GRN FAULT
flash OFF OFF Low Battery Voltage
flash flash OFF Motor 1 Stall
flash OFF flash Motor 2 Stall
flash flash flash Double Stall
flash ON OFF Motor 1 Current Trip
flash OFF ON Motor 2 Current Trip
flash ON ON Double Current Trip
ON OFF OFF Battery Over Voltage
ON flash OFF Motor 1 No Motion
ON OFF flash Motor 2 No Motion
ON flash flash Double No Motion
OFF OFF flash Feedback Alarm
OFF flash OFF Loss of Command
OFF ON OFF Command Out of Range
OFF flash flash Feedback Alarm and Loss of Command
OFF ON flash Feedback Alarm and Command Out of Range