20
Problem
Possible Cause
Possible Solutions
Several
stations
above 32
(stations)
are not
operating
when using
external
Senders.
If several stations
above 32 are not
displayed in the
“Faults” screen
then:
If the “Faults”
screen displays a
“fail turn on“ for a
group of stations:
The first step is to check between the external Sender(s) and
the host controller.
• Press the ‘Diagnostics” menu button and then select “View
Sender Commands” screen.
• Operate the host controller in manual and observe if the
display for the station numbers change from “-“ to a “+”.
• If a “-“ is displayed, check the Sender input wires in the
host controller are properly connected.
• If there is row of “.” then the Sender red and black wires are
not connected to the 2Wire path.
• The Sender has not been programmed between 5-8. Verify
using the portable programmer.
• The Sender is defective and should be replaced,
(remember to program with the right Sender number
using the portable programmer).
The second step checks for issues downstream of the
Senders down the 2Wire path to decoders.
• The decoder’s address is incorrect. Remove and
reprogram.
• A wire connection between the Sender and the 2Wire path
is downstream of the Novo is broken. Locate and repair as
needed.
• A wire connection between the decoder and the solenoid
is broken. Repair the wire connection.
• There is a short circuit in the solenoid. Replace the
solenoid.
A station(s)
will begin
to operate
but then
immediately
turns off.
The increase in
current of the
decoder/ station
solenoid exceeds or
is below the factory
default settings in
the Novo.
(This is an
extremely rare
occurrence).
Use the “Diagnostics\Edit Decoder Setup” to change these
values. Do not attempt this without calling Underhill for
additional technical assistance.
