Programming instructions

198
3300 ICP Technician’s Handbook
Power unit is
functioning, but
fans do not work.
Blocked fan
opening OR
faulty internal
power supply.
Verify that all the fan openings are
clear of any blocking material.
Power unit is
functioning, but AC
LED is OFF.
Internal circuitry
fault OR
internal power
supply failure.
1. If the fans are working, there is
probably an internal circuit fault.
2. If the fans are not working, there is
probably an internal power supply
failure.
Power unit
powered up, but
Alarm LED still ON.
Power on self-test
(POST) not
completed OR
internal fault.
1. Verify if POST sequence is as
listed or not.
2. If the Alarm LED stays ON after
the POST sequence, there is an
internal fault.
IP device does not
work, and both
Port Status LEDs
are OFF (Power
unit is not detecting
IP device).
Wiring problem
OR
faulty IP device
OR
faulty Power Unit.
1. Verify you are using a standard
UTP Category 5, 6 or 6e cable
(with 8 wires–4 pairs).
2. Verify that you are not using a
crossover cable.
3. Verify that the connections for the
port pair both correspond to the
same IP device, and that the port
connections are not reversed.
4. Verify that the cables connected to
the Data In and Data Out ports
correspond to the same IP device.
5. Connect the IP device to a
different port pair on the Power
Unit. If the device works normally,
the original port is probably faulty.
6. Connect the IP device directly to
the Power Unit using a short
cable. If the device works
normally, the original cable (or one
of its connectors) is faulty.
7. If possible, connect the IP device
to a different Power Unit. If the
device works normally, the original
Power Unit is probably faulty.
Table 19: In-Line Power Troubleshooting (continued)
Symptoms Probable cause Corrective Action
(Page 2 of 4)