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7
DLC-PDC TROUBLESHOOTING GUIDE
When a DLC-PDC does not function as expected, the solution can usually be isolated to one of four
possible problems. This guide will help to determine which problem(s) is preventing the proper
operation of the DLC-PDC.
Observed Behavior
Possible Cause
Troubleshooting Instructions
DLC-PDC does not switch state or
the LEDs do not respond as
expected.
Lack of Power
Connect a DC voltmeter between
Terminal 4 and Terminal 5. The
reading should be 15VDC for the
DLC-PDC.
Lack of Sensor Signal
Connect a DC voltmeter between
the yellow and black wire (for
DLC-PD). When the sensor is
covered the reading should be
0VDC. When the sensor is
exposed to bright light the reading
should be approximately 10VDC.
Faulty Controller
Examine the gross functionality of
the DLC-PDC by doing the
following:
1.
Turn off the Input Time
Delay Switch
2.
Disconnect the Sensor
–
the lighting circuit should
come on
3.
Jumper Terminal 1 to
Terminal 5
– the lighting
circuit should go off
Poor Calibration
Review the Calibration Procedure
in Section 4
Lighting circuits cycling
Poor Calibration / Sensor
Mounting
The deadband will likely need to
be increased. It is common for the
mounting of a sensor to result in
the reading of the sensor being
influenced by the lighting circuit
that it is controlling. The additional
light contribution of the circuit
should not allow the lights to be
turned back off.
Table 2: Troubleshooting Guide
NOTE: For additional technical support please call
Cooper Lighting Solutions at
770-486-4800