FV741 Rev. A 01/20/21
Page 8
FV741 Rev. A 01/20/21
Page 7
1 2 3 4 5 6 7
8
ON
OFF
To adjust features from default configuration, you must remove the
battery tray. Once battery tray is removed you will see the switches.
Purge Features:
The purge switches can be configured for 4 modes of operation: Disabled (standard configuration), 12 hour, 24 hours, or 48 hours.
Purge water flow 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 configurations: 30 seconds (standard), 5s, 10s, 15s, 60s, & “Less Time-out”. The “Less Time-out” option
actually ceases water flow (turns off) 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 off after hands are removed. If hands are not removed the time out delay will turn off the faucet (ex:
standard configuration is 30 seconds)) (See Sensing & Metering Mode flow chart above page)
Metering Mode:
When hands are detected by the sensor, water will run for ‘ X’ seconds (standard configuration is 30 seconds) before turning off. (See
Sensing & Metering Mode flow 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,
& finish. The faucet sensor sensitivity is configured 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.
-Off 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 filters the effects of flowing in the bottom of problematic sinks. Detection maybe less for some
hands.
-Off disable the filter 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 configuration 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 configuration.
All switches shown in
default mode.
Switch Position:
1
2
3
4
5
6
7
8
Purge (Hours)
Disable:
12:
24:
48:
Off
On
Off
On
Off
Off
On
On
Time 30:
(Seconds) 5:
10:
15:
60:
Less Time-out
Off
On
Off
On
Off
On
Off
Off
On
On
Off
Off
Off
Off
Off
Off
On
On
Mode Select
Sensing Mode:
Metering Mode:
Off
On
Sensor Sensitivity
Low:
Off
Normal:
On
Mode A:
Off
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 Battery voltage low or no power.
Change out batteries 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 tip. May require
cleaning with a damp cloth or sensor replacement
Sensor lens could be obstructed
by environmental factors such
as highly reflective surfaces or
bright lighting conditions.
If this is the case, then adjust the dip switch settings for sensor
sensitivity 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 Off to set the sensor to the lowest sensitivity level
(detection range may be less for all hand types).
-switching to alternate mode using switch 8; mode A or B depend-
ing on current configuration
Reset sensor after dip switch changes.
Faucet does not activate
after initial installation
Sensor may not have had enough
time to calibrate prior to a user
or target trying to initiate activa-
tion.
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 calibration is complete.
Check if protective film 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 Activation
Sensor lens could be obstructed
or environmental factors such as
highly reflective surfaces and/or
bright sunlight conditions.
Check/clean sensor lens of any debris or buildup If sunlight or IR
interference is a factor, refer to page 7 “Sensor Sensitivity” and
adjust faucet for Mode B operation. Also, decreasing the sensitiv-
ity setting (switch 7) may help.
Reset sensor after dip switch changes.
Sensor faucet is leaking
underneath the sink or
counter
Mounting hardware is not tight-
ened sufficiently (faucet shank,
electronic box, supply hoses, etc)
Check and ensure the nuts and joints are tight 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 off. Check to ensure
the washer is installed or damaged. If not, install washer. If a
washer is damaged, replace with new.
Trouble Shooting: Faucet
