Novar Savvy Service Manual - page 9
DOC. #TD-0240 11/30/06
9
Savvy
®
Service Manual
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YES
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Typically, the ALS is wired to Savvy Terminals 42
and 43 (Input #1). Refer to the Savvy Baseplate
Installation Instructions for exceptions or contact
your Novar Controls account representative.
Is the sensor properly wired?
Meter the appropriate terminals
with the wires connected.
Is 24 VDC present?
Analog Light Sensor Faults
Troubleshooting Chart
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YES
Connect the ALS to the
appropriate terminals.
Take a milliamp reading at
the terminal strip.
Is the milliamp reading within
the 4
–20 milliamps range?
Remove the sensor wires
from the terminal strip
and meter the terminals.
Is 24 VDC present?
Replace the
using
the procedure provided in
this manual and make
sure the replacement
operates properly.
Savvy
Make sure the wires are connected to
the
and meter the terminals of
the ALS on the Outdoor Sensor
Assembly on the roof.
Note! Both the LED and the sensor are
polarity-sensitive.
Is 24 VDC present (LED will be lit)?
Savvy
Check the polarity.
Note! Both the LED and the sensor
are polarity-sensitive.
Is the polarity correct?
The wire is open.
Trace and repair it.
The ALS or wire is shorted.
Reconnect the wires to the
terminal strip, Disconnect the
wires from the ALS on the roof,
and meter the wires.
Is 24 VDC present?
The input is bad. Replace
the
and make sure the
replacement operates
properly.
Savvy
The sensor is shorted.
Replace it and make sure
that the replacement
operates properly.
The wire is shorted.
Trace and repair it.
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YES
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YES
Replace the ALS and make
sure the replacement
operates properly.
Refer to the Savvy Baseplate
Installation Instructions.
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YES
Reverse the
connections.