Fujitsu UTD-ECS5A Tech Tips

UTD-ECS5A Wire Kit

to normally open by moving the wire from NC

The UTD-ECS5A is a wire kit for our Slim Duct models. This wire kit
can be used for emergency shutdown, fresh air control, aux heat, or
turning the unit on and off remotely. Below will show you how to wire
in an emergency shutdown drain switch. This can be used if you are
installing an auxiliary drain pan under the slim duct unit. This
configuration will shut down the unit if the primary drain fails and water
spills into the auxiliary drain pan.

First you need to find a Normally open float
switch. The switch we use in this example is a
Little Giant model#ACS-3. (Any normally open
switch will work)The switch comes normally
closed from factory, but needs to be changed

to NO.

The wires from the switch will now be
crimped onto the UTD-ECS5A wire
connector (3 wire connector). Use wires
1 and 3 on the connector. Wire 2 should
not be used. Use crimp or butt
connectors. Plug in the Molex plug to
CN102 on the power filter board.

POWER MUST BE TURNED OFF
WHILE WIRING THE FLOAT SWITCH.

Tech-Tip #031
Rev. Date 1/30/14

After installing the switch the next step is
programming. You must program the unit for
“Forced Stop”. Function 46 setting value 02.
This can be found in the installation manual for
the unit. Once programming is finished power
must be reset for 5 minutes.