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GATmatic GM-720 Manual

A/c system maintenance centre
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GM-720 A/C System Maintenance Centre
GM-720
A/C System Maintenance
Centre

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Summary of Contents for GATmatic GM-720

  • Page 1 GM-720 A/C System Maintenance Centre GM-720 A/C System Maintenance Centre...
  • Page 2 GM-720 A/C System Maintenance Centre Safety  The machine is designed to be used and repaired by qualified personnel only.  The machine designed for use in recovering the R134a refrigerant fluid used in the air-conditioning (A/C) systems of motor vehicles. Fill the A/C system with the quantity of refrigerant recommended by the manufacturer.

  • Page 3: Table Of Contents

    GM-720 A/C System Maintenance Centre  Care of the manual. TABLE OF CONTENTS 1. Introduction ..............................1 1) Outline ................................1 2) Features ................................. 1 3) Specifications ..............................1 2. Functions ............................... 2 1) Primary functions ............................2 2) Subsidiary functions ............................2 3.
  • Page 4 GM-720 A/C System Maintenance Centre APPENDIX: ALARM CODE TABLE ......................12...

  • Page 5: Introduction

    GM-720 A/C System Maintenance Centre is intelligent equipment collecting of the A/C flushing, recovery, recycling, recharging and other functions in one. It’s with the beautiful shape, humanized operation interface, and advanced manufacturing processes to make the A/C maintenance professional and simple.

  • Page 6: Functions

    GM-720 A/C System Maintenance Centre F. Oil bottle: 250ml,double G. Working pressure: max. 20bar H. HP gauge: -1bar~3.5MPa LP gauge: -1bar~1.5MPa J. P gauge: -1bar~3.5MPa K. Backlighting：LED 2. Functions 1) Primary functions A. Flushing B. Recovery/Recycling C. Used oil discharging D.

  • Page 7: Operation

    GM-720 A/C System Maintenance Centre 3. Operation 1) Parts descriptions HP gauge LP gauge Displayer P gauge Operation panel Window Switch for used oil discharge Used oil bottle Switch for new oil adding HP port LP port Auxiliary Port New oil bottle...

  • Page 8: First Use

    GM-720 A/C System Maintenance Centre LED displayer Recharging Tank indicator Parameter increase key Kg indicator Min indicator Parameter increase key Recovery key Vacuum key Flush key Recharge key Enter key Start key Stop key 2) First use A、Unscrew the electronic scale support screw before using the equipment.

  • Page 9: Recovery/Recycling

    GM-720 A/C System Maintenance Centre Connect the hose port with needle to the Recharging Tank port of the machine and connect another port of the hose to the refrigerant tank. Open the valve of the refrigerant tank and place it upside down on the load cell pan.

  • Page 10: Flushing & Recovery

    GM-720 A/C System Maintenance Centre 5) Flushing & Recovery A、Before flushing the pipeline of automotive A/C system, please turn on A/C system and run it for 5 to 10 minutes. And set it as the lowest temperature and medium wind.

  • Page 11: New Oil Adding

    GM-720 A/C System Maintenance Centre C、Set the vacuum time by pressing "+" or "-" and press the "ENTER" key to confirm it. It should be more than 15 minutes. Generally, it needs 15 minutes at least for the air conditioning only with front wind and 20 minutes for with the front and rear wind.

  • Page 12: Maintenance

    GM-720 A/C System Maintenance Centre recharging tank (external tank). Otherwise, from the cleaning tank (internal tank). iii. It’s by cleaning tank (internal tank) to recharge as default. After fixed the recharging tank (external tank), you can set to recharge refrigerant from the recharging tank (external tank).

  • Page 13: Parameter Setting And Inquiring

    GM-720 A/C System Maintenance Centre iii. The LED displays “1” in flushing. iv. Press "ENTER" key to do the empty plan calibration. Then the LED will display “2” in flushing. Note: If LED shows “ERR1”，please refer to the APPENDIX: ALARM CODE TABLE.
  • Page 14 GM-720 A/C System Maintenance Centre Step 1: unscrew the block of the drain port to drain entirely out the old oil. Then re-back the block to the drain port. iii. Step 2: unscrew the cap of the fill port and then fill the new oil slowly into the vacuum pump until the oil level reach at the center site.
  • Page 15 GM-720 A/C System Maintenance Centre vii. Press “ENTER” into setting mode. Press “+”or”-” to select the setting value. C-1: Set the cleaning tank (internal tank) as default. This is also default of nufactory. C-2: Set the recharging tank (external tank) as default.
  • Page 16 GM-720 A/C System Maintenance Centre APPENDIX: ALARM CODE TABLE Descriptions Emergency Method No enough refrigerant in Supply refrigerant in time. cleaning tank Transfer some refrigerant to another Too much refrigerant in tank tank. High pressure Stop use for a period.

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