Nuvo Simplese NV-A4DS-UK Installation Manual page 22

Troubleshooting
Symptom
The IR emitters remain constantly lit.
The IR repeater does not properly control
the audio source equipment.
External amplifier (NuVo P2100) or other
model audio output creates a hum.
Probable Cause
IR interference.
One or more of the IR emitters are not
properly placed over the IR receiver on the
audio source equipment, or the IR output
on the Simplese does not correspond with
the audio equipment you are controlling.
Ground loop.
19
Remedy
This is commonly caused by a security
motion detector aimed at the keypad's
IR receiver. If possible, redirect the
motion detector. Try to keep the keypad
from strong direct sunlight. This can
also cause interference. This can also be
caused by an incorrect wire pinout at the
CAT5 RJ45 termination. Check using a
CAT5 tester and re-terminate if
necessary.
Reposition the LED end of the emitter on
the face of the source equipment, so it
is flashing directly over that source's IR
receiver. Make sure that the emitter
plugged into IR Output #1 is actually
going to source #1 , and so on for
sources 2-4.
Unplug the audio input to the amplifier
to see if the hum disappears. If so,
install a ground loop isolator audio
cable.