
FV741 Rev. A 01/20/21
Page 8
FV741 Rev. A 01/20/21
Page 7
To adjust features from default conguration, you must remove the
battery tray. Once battery tray is removed you will see the switches.
Purge Features:
The purge switches can be congured for 4 modes of operation: Disabled (standard conguration), 12 hour, 24 hours, or 48 hours.
Purge water ow duration is 2 minutes. Note: Purge activation occurs every switch selected time (0,12, 24, or 48 hours) after last
activation.
Flow Time:
There are 6 optional time congurations: 30 seconds (standard), 5s, 10s, 15s, 60s, & “Less Time-out”. The “Less Time-out” option
actually ceases water ow (turns o) after 20 minutes to limit chance of water damage in the event a sink drain becomes blocked .
Sensing Mode (DEFAULT):
During this mode the valve will shut o after hands are removed. If hands are not removed the time out delay will turn o the faucet (ex:
standard conguration is 30 seconds)) (See Sensing & Metering Mode ow chart above page)
Metering Mode:
When hands are detected by the sensor, water will run for ‘ X’ seconds (standard conguration is 30 seconds) before turning o. (See
Sensing & Metering Mode ow chart on following page)
Sensor Sensitivity: (Default setting: Low):
There are 4 sensitivity options, which can be selected to achieve the optimal detection performance related to the sink material, shape,
& nish. The faucet sensor sensitivity is congured during pack-out but the mode can be changed upon installation to optimize the
performance within the sink. Sensor sensitivity and sensor detection Modes A & B may be tried for various lighting conditions, sink
materials and shape.
Switch 7 controls the sensitivity
-On (default) is normal sensitivity for most sinks providing max range.
-O set the sensor to a lower sensitivity level for sinks that cause false activation. The detection range maybe less for all hands.
Switch 8 controls sensor mode
-On (default) enables the mode that lters the eects of owing in the bottom of problematic sinks. Detection maybe less for some
hands.
-O disable the lter mode, so detection is expanded deeper into the sink for max detection range for all hands. Some sinks may
only be able to operate in this mode.
NOTE: After a conguration switch change has been made. Disconnect sensor cable from electronics box, wait 30 seconds, then
reconnect sensor cable and wait 30 additional seconds to allow the sensor to tune-in the sink characteristics. Calibration includes
characterizing the sink with water running into the bowl. This could be 5 to 60 seconds depending on conguration.
All switches shown in
default mode.
Switch Posion: 12345678
Purge (Hours)
Disable:
12:
24:
48:
O
On
O
On
O
O
On
On
Time 30:
(Seconds) 5:
10:
15:
60:
Less Time-out
O
On
O
On
O
On
O
O
On
On
O
O
O
O
O
O
On
On
Mode Select
Sensing Mode:
Metering Mode:
O
On
Sensor Sensivity
Low: O
Normal: On
Mode A: O
Mode B: On
Adjustable modes and features selection
For further assistance with troubleshooting visit http://www.zurn.com
Problem Possible Cause Corrective Action
Faucet is non-responsive Baery voltage low or no power. Change out baeries or verify power provided by ACA
Sensor and electronic connector
cable has bent or broken pins.
Check to see if pins are missing, bent, or broken. If yes, then the
electronic box needs to be replaced
Sensor lens could have surface
damage, scratches, or deposit
build ups.
Inspect the sensor lens underneath the spout p. May require
cleaning with a damp cloth or sensor replacement
Sensor lens could be obstructed
by environmental factors such
as highly reecve surfaces or
bright lighng condions.
If this is the case, then adjust the dip switch sengs for sensor
sensivity per the diagram on previous page (switches 7 and 8).
Direct sunlight into sink may make the unit inoperable. Do not
allow direct sunlight into sink.
If one mode does not help try one of the following:
-switching 7 to O to set the sensor to the lowest sensivity level
(detecon range may be less for all hand types).
-switching to alternate mode using switch 8; mode A or B depend-
ing on current conguraon
Reset sensor aer dip switch changes.
Faucet does not acvate
aer inial installaon
Sensor may not have had enough
me to calibrate prior to a user
or target trying to iniate acva-
on.
Disconnect the sensor and electronic box cables and wait for 30
seconds. Reconnect the cables, but allow for another 30 seconds
before placing hands or a target within the sensor range. You
should hear a click of the solenoid once calibraon is complete.
Check if protecve lm was
removed from lens.
Water does not stop Electronics box cable connector
has bent pins that are shorted
Check to see if pins are missing, bent, or broken. If yes, then the
electronic box needs to be replaced.
Ghost Acvaon Sensor lens could be obstructed
or environmental factors such as
highly reecve surfaces and/or
bright sunlight condions.
Check/clean sensor lens of any debris or buildup If sunlight or IR
interference is a factor, refer to page 7 “Sensor Sensivity” and
adjust faucet for Mode B operaon. Also, decreasing the sensiv-
ity seng (switch 7) may help.
Reset sensor aer dip switch changes.
Sensor faucet is leaking
underneath the sink or
counter
Mounng hardware is not ght-
ened suciently (faucet shank,
electronic box, supply hoses, etc)
Check and ensure the nuts and joints are ght and secure from
the supply stop all the way to the faucet shank.
Missing the washer located in the
solenoid box nut where it assem-
bles to the faucet shank.
Make sure the water supply stops are shut o. Check to ensure
the washer is installed or damaged. If not, install washer. If a
washer is damaged, replace with new.
Trouble Shooting: Faucet