1485 Jacobs Rd.
Deland, FL 32724
386.738.7307
P/N 53-00375-376 Rev. C 032619
www.intellitec.com
Intellitec
SERVICE MANUAL
MPX Sofa Controller
200/400
HOW IT WORKS
Model 400
Model 200
SETTING THE STOP ADJUSTMENT
TROUBLE SHOOTING
The
utilizes relay switching to control power to the two sofa motors (See Figure
1). To limit the amount of current drawn, only one motor is allowed to operate at any given time. When the unit
is at rest, all the motor leads are connected to ground. To operate a sofa motor, the controller applies 12 volts to
the selected sofa motor.
To prevent damaging the motors or opening of the fuse or circuit breaker, the controller senses the current
drawn by the motors. If the current exceeds a preset level, the controller shuts off. To restart the motor, press
the switch in another direction.
The controller operates by sensing the voltage on the
bus wire. When the
bus is at
12 volts, the motors are at rest. Each switch function sends a different load to the controller which it interprets
as a certain direction. These voltages are as follows:
Slide Forward
0 volts
Recline Up
0 volts
Slide Back
2.1 volts
Recline Down 2.1 volts
Recline Down 3.5 volts
Recline Up
5.7 volts
(Note: This voltage must be read with a voltmeter. A test light will cause erratic operation). If more than one
switch at a time is pressed, the sofa will operate in an indeterminate direction.
The
is used to set the level of current, above which the motor will shut off. The control's correct
adjustment is at a level that is sufficient for proper operation of the sofa, but not so high as to overload the fuse or
circuit breaker.
Start the setting procedure with the control set in the approximate center of rotation. Operate the sofa, both
slide and recline through the full range. (Lifting the back from its open position usually requires the maximum
current). If the sofa stops prematurely, slightly increase (turn the control clockwise) the setting and test again.
If it is hitting the stops too hard, decrease (turn the control counter clockwise) the setting.
The controller contains three relays to drive the two motors in both directions, (See Figure 1). A simple test
to see if the controller is operating can be done by disconnecting the sofa motors, pressing a switch, and
listening to the relays. At each press of a switch, at least one relay should click.
MONOPLEX SOFA CONTROL
MONOPLEX
MONOPLEX
STOP ADJUST
2
