KNS Ku-BAND RX, Installation And Operation Manual, Page: 108 / 123

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9. Troubleshooting
It is important that the operator recognizes symptoms correctly and searches for broken
parts, as SAMYUNG ENC or the installer will then be able to cope with a problem more
rapidly.
This section concerns symptoms indicating breakage and offers a list of points for
checking for those symptoms. There may be many checkpoints for one symptom, so you
must follow the checkpoint steps. If your problem is solved in the 1
st
step, there is no need
to follow the subsequent steps: Otherwise, you will have to go to the next step.
Symptom #1 ACU does not turn on following ACU power on.
Check Point
1. Make sure that the AC power cabling is connected between the ACU
and the AC connector.
2. Check the output power (48VDC) of the RX power supply.
3. Check the power line of the ACU board.
Symptom #2
The ACU LCD blinks continuously when the ACU power is on, and the
relay switch clicks repeatedly.
Check Point
1. Remove the cable between the RX power supply and the ACU board.
Then, check the output voltage of the RX power supply.
2. If the 1
st
step is OK, re-connect the cable. Check the short-circuit of
power line on the ACU board.
Symptom #3
ACU repeatedly displays ‘ACU INITIALIZE’, and relay switch clicks
repeatedly.
Check Point
1. Disconnect the RX cable on the back panel of the ACU, then re-try the
power on.
2. If it is ok in the 1
st
step, re-connect the RX cable.
3. Check the rotary joint: Disconnect the RX cable (CH1) on the top side
of the rotary joint, and then re-input the power to the ACU. If the