United CoolAir MP Controller Installation & Operating Manual

MP CONTROLLER

The MP Controller is no longer offered by United CoolAir. The manual
included here is for reference on those units that have included this controller
in the past.

Please contact a United CoolAir distributor for alternative controls that would
be suitable for your specific application.

UNITED COOLAIR CORPORATION

491 E. Princess Street

York. PA 17403

[phone]

Fax [phone]

www.unitedcoolair.com

Email: [e-mail]

MP CONTROLLER

INSTALLATION & OPERATING

MANUAL

UNITED COOLAIR CORPORATION

491 E. Princess Street

York. PA 17403

[phone]

Fax [phone]

www.unitedcoolair.com

Email: [e-mail]

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TABLE OF CONTENTS

GENERAL INFORMATION 3

MP CONTROLLER COMPONENTS 3
Main Board 3
Temperature / Humidity Sensor 3
Display 4
Display Layout 4
Normal Display Mode 5

INSTALLATION OF THE COMPONENTS 6
Installation of the Display 6
Location 6
Installation Materials and Tools 7
Installation Procedure 7
Installation of the Temperature / Humidity Sensor 7
Location 7
Installation Materials and Tools 7
Installation Procedure 7

OPERATION OF THE CONTROLLER 8
General Notes 8
Starting and Turning Off Unit 8
Mode 8
Setting Current Temperature Set Point 8
Setting Current Humidity Set Point 9
Humidity Override 10
Dehumidification / Reheat 10
Auto Fan 10

MP CONTROLLER ALARMS 10
Alarm Type 10
Alarm Reset 11

PROGRAMMING THE CONTROLLER 11
General Notes 11

A. Setting the Time Of the Day / Day of the Week 11
B. Setting the Time of Program for Weekdays Schedule 12
C. Setting the Cool / Heat Set Point for Weekdays Schedule 12
D. Setting the Humidity Set Point for Weekdays Schedule 13
E. Setting the Time, Cool, Heat and Humidity Set Points for Programs 2, 3 and 4 13
F. Setting the Time, Cool, Heat and Humidity Set Points for Saturday & Sunday 13

Schedule 14

CARE AND MAINTENANCE 14
General Care 14
Battery Care 14

SPECIFICATIONS 15

CUSTOMER SERVICE 15

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GENERAL INFORMATION

Read and save this installation and operating manual before proceeding with installing or operating the
MP CONTROLLER.

1. The MP CONTROLLER has been carefully inspected and tested before leaving the factory.

2. Examine the controller components (SENSOR and DISPLAY units) for any damage that might have
occurred during transit. Please notify the carrier if there is any damage.

3. Installation of the MP CONTROLLER should be performed by qualified personnel.

THE MP CONTROLLER COMPONENTS

The MP CONTROLLER is made up of three components.

MAIN BOARD

The MAIN BOARD (Fig 1) is an electronic component located inside an electrical box of the unit.
It controls all the functions of the compressors, fans, humidifier, etc. Only qualified personnel
should access the board.

Temperature / Humidity SENSOR

The Temperature/ Humidity sensor (Fig 2) is wall mounted. The sensor measures the temperature and
humidity of the conditioned space and provides the controller with the data for the control actions.

Fig 1 Main Board Fig 2 Temperature / Humidity SENSOR

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Display

The display (Fig 3) provides information on the state of the
controller. It also serves as the interface for controlling the
operating parameters.

Display Layout

Fig 3 Display

10

13

11

12

Fig 4. DISPLAY

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1. ON/OFF button: Press to turn the unit on. Press and hold for about 3 seconds to
turn the unit off.

2. button: Press this button to increase the value of the control parameter when
the cursor is in a parameter field.

3. button: Press this button to decrease the value of the control parameter when

the cursor is in a parameter field.

4. PROG button: Press this button to go to the program mode of the controller (the

LCD will flash).

5. CLOCK button: Press this button to adjust the time and day of the week. The +/–

buttons are used to carry out the adjustment.

6. MODE button: Pressing this button sets the operating mode: COOL only, HEAT

only, COOL/HEAT (auto change over) or FAN ONLY.

7. HUM button: This button controls the humidifier function while the unit is in

operation. It is also used to change the humidity set point for the current program
cycle.

8. RESET button: Pressing this button will reset the controller after an alarm.

9. AUTO FAN button: Pressing this button activates the auto fan mode, thus the

indoor fan will only come on when there is a call for heating or cooling. When the
controller is not on AUTO FAN, the indoor fan will be on all the time.

10. LCD DISPLAY : The liquid crystal display. The user will view the controller

actions via this display.

11. ON LED: Green LED indicates the state of the unit. When lighted (ON

constantly), unit is running, when blinking, unit is on standby.

12. ALARM LED: Red LED indicates an alarm condition. When blinking, there is an

alarm. It will remain blinking until the system is reset.

13. DRY: Above this location, the LCD Display will indicate when the system is in the

dehumidification mode.

Normal display mode

Whenever the controller is on, the display will alternatively show the following:

• The time of the day.

• The set temperature for the particular period.

• The current room temperature.

• The current room humidity (if humidifier is on).

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