Intellitec MONOPLEX User manual

1485 Jacobs Rd.
Deland, FL 32724
386.738.7307
P/N 53-00145-000 Rev. B 032119
Www.intellitec.com
Intellitec
SERVICE MANUAL
MONOPLEX WATER PUMP CONTROL
CAUTION
Note: MONOPLEX WATER PUMP CONTROLLERThe is a power switching controller used
to operate the domestic water pump in an RV. Power from the battery of the vehicle is fed to
this control. Inadvertent shorts at this box could result in damage and/or injury.
All servicing of this box should be done only by a qualified Service Technician.
Tools required: Low current test light, DC voltmeter
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P/N 00-00145-100

1485 Jacobs Rd.
Deland, FL 32724
386.738.7307
P/N 53-00145-000 Rev. B 032119
Www.intellitec.com
Intellitec
SERVICE MANUAL
MONOPLEX WATER PUMP CONTROL
PRODUCT DESCRIPTION
HOW IT WORKS
The is a part of the Intellitec family. These
controllers all work on the principle of putting the controller near the load to minimize the length of
heavy wiring, and the use of a single, low current control wire to connect to all the switches. Using this
technique, the heavy gauge wire is confined to supplying the load in a direct fashion, while an
unlimited number of small, simple switches can be added to control the loads by simply connecting the
single wire to each switch.
The is an electronic circuit which functions as a remotely controlled on/off
switch. It is used to switch the ground side of the load, and is therefore called a "low side" switch. The
switch portion of the controller consists of a Field Effect Transistor which has virtually unlimited, on/off
cycle life. Through the use of this transistor, current handling is high, voltage drop is low, and the
controller standby current draw is less than 2 milliamps.
In a normal application, it is mounted near the water pump to minimize the length of heavy gauge wire.
Alight gauge wire is run from this unit to as many switches as desired, to control the pump.
The is connected in the ground side of the water pump. The positive side of
the pump is connected to a source of +12 volts. The controller becomes the ground return for the
pump. If the Controller is off, when the pump's pressure switch is on, both pump wires will be at +12
volts.
When 12 volts is first applied, the controller will be off. It can be turned on by momentarily pressing
any switch connected to the switch wire. Pressing any switch again will turn off the
controller. The switches are actually shorting the switch to ground. Each time the
controller "sees" this short, it switches from one state (on or off) to the other state. When the switch is
off, the controller puts approximately 2.50 volts on the wire. When the switch is on, the
controller puts approximately 7.3 volts on the wire. This change in voltage can be used
to light indicator LED's connected to this line.
Care should be taken when servicing the controller. Inadvertent shorts across the
pump or from the output of the controller to +12 volts, will damage the controller.
MONOPLEX Water Pump Controller MONOPLEX
MONOPLEX
Water Pump Controller
Water Pump Controller
MONOPLEX
MONOPLEX
MONOPLEX
MONOPLEX
CAUTION:
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TM
TM
TM
TM
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2

1485 Jacobs Rd.
Deland, FL 32724
386.738.7307
P/N 53-00145-000 Rev. B 032119
Www.intellitec.com
Intellitec
SERVICE MANUAL
MONOPLEX WATER PUMP CONTROL
Trouble Shooting
Problem Cause/Solution
Pump won't run.
Pump won't shut off.
Pump fuse blown. Check fuse, replace if
necessary.
Pump defective. Remove pump wire from
controller and connect it to ground.
Pump should run, if not replace pump.
Check voltage of pump lead at the Controller.
Should be 0 volts. If not, momentarily short
Switch wire to ground to turn controller on. If
voltage is still at +12 volts, replace controller. If
pump runs, check switch wiring. Voltage on
switch wire should be 0 when any switch is
pressed.
Check switch wire for voltage. Should be 7
volts when running, 2.5 when off.
If not, replace controller.
Check switch wiring.
Possible
3

1485 Jacobs Rd.
Deland, FL 32724
386.738.7307
P/N 53-00145-000 Rev. B 032119
Www.intellitec.com
Intellitec
SERVICE MANUAL
MONOPLEX WATER PUMP CONTROL
Typical Installation Schematic
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Water Pump Pressure Switch
Fuse
Battery
Water Pump
Optional
Switches
Momentary
Switches
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