Contacta HLD7 User Manual - Page 14
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Symptom
I've adjusted the HF comp
and see no change.
I start the driver and
immediately the status light
turns on.
I start the driver and test
sequence starts, but after
it's done, the status light
turns on.
I've connected the loop and
the driver doesn't work, the
status light comes on.
My driver has been working
well for a couple weeks and
now the status light is on.
The power light doesn't
come on.
I can't get my driver out of
adjustment mode.
Interference (buzzing/
whistling/hissing) is heard
through induction loop.
My driver is very hot.
14
Troubleshooting
Possible Fault
1) The driver is working close
to maximum output so there is
not enough headroom for the
HF comp to make a difference.
1) Loop shorted or open, too
small or too large.
2) Internal self-test failure.
1) Mains power absent.
2) Internal failure.
1) Button presses not
coinciding.
2) Internal failure.
1) Bad input signals.
2) Internal failure.
1) Large amount of mains hum
present on input.
2) Internal failure.
Action
1) Check loop characteristics.
If response OK at 1 amp, the
headroom is inadequate.
1) Check loop and
connections, try known good
loop.
2) Check loop DC resistance
with an ohm meter:
0.33 ohms minimum.
1) Check mains power.
2) Seek assistance.
1) Press both buttons together
to exit mode.
2) As a last resort, cycle
power off/on. New settings
should have been saved.
1) Power off driver and
confirm that interference isn't
from external origin.
2) Disconnect input signals.
If sound disappears, check
inputs.
1) Check input signal source.
2) Incorrect driver being used.