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Micro Air Corporation FX-1 Operation Manual

Direct expansion digital control
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  • Page 2: Table Of Contents

    Contents FX-1 Operations Manual Micro Air Corporation 124 Route 526 Allentown, NJ 08501 ................................1 NTRODUCTION ..............................2 ASIC PERATION ..............................3 YSTEM VERVIEW ......................4 & 5 PERATOR ONTROLS AND ISPLAY ANEL ............................5 UTTON UNCTIONS ............................6 PECIAL...

  • Page 3: Introduction

    The FX-1 Control is designed for use with all direct expansion, reverse cycle air conditioning systems. FX-1 has a universal power supply that operates on 115, 230, 50 or 60 Hz AC power. FX- 1 includes the following standard and optional features: Standard Features User friendly 4 button display panel requires no manual for basic operation.

  • Page 4: Basic Operation

    FX-1 Operations Manual ASIC PERATION POWER BUTTON Press the power button once to toggle the unit to the on mode. Press the power button again to toggle the unit to the off mode. UP BUTTON Momentarily press and the set point will appear in the temperature display.

  • Page 5: System Overview

    Select Automatic and both heating and cooling will be supplied as required. While in the Automatic Mode FX-1 will maintain a two degrees Fahrenheit (2 °F) temperature variation. A four degree swing is required to cause the unit to shift to the opposite mode. Once in a given mode, heating or cooling, FX-1 will maintain a two degree differential.

  • Page 6: Operator Controls And Display Panel

    FX-1 Operations Manual PERATOR ONTROLS AND ISPLAY ANEL Refer to figure 1 for the buttons locations and display functions listed on the following pages. 1. POWER BUTTON The power button is used to toggle between the on and off modes. Press the power button once to toggle the unit to the on mode.

  • Page 7: Dual Button Functions

    4. SELECT BUTTON The select button is used to select one of the four operating modes. Press and release the select button and the FX-1 will advance to the next mode. Continue to press and release the select button until the desired operating mode is reached. The mode selected is indicated by the Mode LED, i.e., Cool, Heat, Automatic or Away Mode.

  • Page 8: Special Button Functions

    PERATION Off Mode When the FX-1 is in the off mode, all control outputs are turned off. Program parameters and user settings are saved in nonvolatile memory. The program mode can only be accessed from the off mode. The power LED remains lit in the off mode.

  • Page 9: Away Mode

    ODES Automatic Fan Mode FX-1 has six automatic fan speeds available. Speed six is high, three is medium and one is low or the slowest speed. Automatic fan mode allows the FX-1 to determine the required fan speed based on room temperature.

  • Page 10: Entering The Program Mode

    The characters "P" then "P 1" followed by the parameter setting, appear in the display. The FX-1 control is now in the program mode. Exit the program mode, to the off mode, by pressing and releasing the power button.

  • Page 11: Programming

    Exiting the Program Mode There are two methods to exit the program mode. Press the power button and the FX-1 control will return to the off mode. Not pressing any buttons or attempting any program changes for sixty (60) seconds will allow the control to exit the program mode to the off mode.

  • Page 12: Default Program Table

    FX-1 Operations Manual Programmable Parameters There are seventeen (17) programmable parameters with their Factory Default Settings listed in this section. The table below indicates what these parameters are, along with the permitted values and the original Factory Default Settings. Program...

  • Page 13: High And Low Fan Speed Limits

    (4) consecutive failures… Manual reset is required to restart the system. P-7: Low AC Voltage Cut-Off FX-1 can be programmed to protect the system against sustained low AC line voltage conditions. The compressor will be shut down and "LAC" flashed in the display if the line voltage goes below the programmed value for more than ten (10) minutes.
  • Page 14 FX-1 Operations Manual P-8: De-Icing Cycle FX-1 is equipped with a De-Icing Cycle to prevent ice build up on the evaporator coil during extended periods of cooling operation. Installation variables such as grille sizes, length of ducting, insulation R factors and ambient temperatures determine the cooling run time required to achieve set point.

  • Page 15: Reset Memorized Defaults

    AULT ANDLING ODES When a fault is detected FX-1 will display one of the following Mnemonic fault codes: HPF… indicates high Freon pressure. 15 Second Delay… Ignored in Heat Mode. LPF… Indicates low Freon pressure. There is a ten minute charge time delay.
  • Page 16 FX-1 Operations Manual SAFE AND AULT ANDLING ODES LAC… Indicates low AC line power … Indicates failed air sensor Unit will not run until repaired. PPP… Indicates the sea water pump has failed. Fail-Safe There are four levels of fail-safe protection including the fail-safe off mode. Level one monitors the sensors, takes appropriate action and allows continuous restarts after a 90 second delay…...

  • Page 17: Factory Self -Test

    Activate the self-test by pressing and holding the on/off button while turning on the AC power. Be sure to continue to hold the button until the power on reset is completed… FX-1 is now in the self- test mode.
  • Page 18 When installing the optional Pump Sensor [ Pump Sentry ] and the Alternate Air Sensor No Outside Air Sensor is available. In order to continually improve and advance the FX-1 Control, Micro Air, Inc. reserves the right to change this product's basic operation, specifications and design criteria without prior notice.

  • Page 19: Service Tools

    Micro Air Corporation. Service History FX-1 will record and remember the last eight (8) service problems or service faults detected. Each time a fault is detected, a one hour timer is started. During that hour the same recurring fault will not be recorded.

  • Page 20: Wiring Diagram

    FX-1 Operations Manual FX-1 W IRING IAGRAM Revision: 06 04 / 08 / 09 Page 18...

  • Page 21: Installation Overview

    FX-1 Operations Manual NSTALLATION VERVIEW Revision: 06 04 / 08 / 09 Page 19...

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