GATmatic GM-720 Manuel utilisateur
GM-720 A/C System Maintenance Centre
GM-720
A/C System Maintenance
Centre
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.
Check the vehicle use and maintenance manual for the type of refrigerant fluid
used by the A/C system. Do not mix different type of refrigerant otherwise can
easily lead to malfunction of the machine.
Keep away from moving parts and rotating elements such as cooling fans,
alternators and heating components, etc to avoid harm.
Wear protective clothing gloves and goggles.
As automotive air conditioning pipe flushing, the operator must be fully familiar
with automotive air conditioning system and operation of the machine. Check
whenever the engine is turned off that the ignition key is turned to the full OFF
position!
Do not expose the machine to direct sunlight or rain. Use only in well-ventilated
work areas.
Never exceed 30 ° tilt in transit process upside down is strictly prohibited.
Do not touch the machine high voltage power supply section, and do not maintain
the machine as power on.
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. Operation ....................................................................................................................................................... 3
1) Parts descriptions .......................................................................................................................................... 3
2) First use ......................................................................................................................................................... 4
3) Recovery/Recycling ......................................................................................................................................5
4) Preparations before Flushing ........................................................................................................................ 5
5) Flushing & Recovery .................................................................................................................................... 6
6) Vacuum ..........................................................................................................................................................6
7) New oil adding ..............................................................................................................................................7
8) Recharging .................................................................................................................................................... 7
9) Maintenance .................................................................................................................................................. 7
10) Parameter setting and inquiring .................................................................................................................. 9
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Centre
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1. Introduction
1) Outline
GM series A/C system maintenance equipment is with the latest design
technique which uses the best control principle and the manufacturing
process.
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.
2) Features
A. Internal pipeline of A/C system flushing, effectively cleared the internal
greasy and fouling, to restore the A/C system performance.
B. With forward flushing, reverse flushing, and pulse flushing functions, which
greatly improve the cleaning effect.
C. Using large-size glass tube with LED backlighting, can effectively observe
the entire cleaning process.
D. Vertically installing the HP & LP gauges let the operator be able to observe
the pressure parameters timely even in the car.
E. Unique design of the pipeline to achieve the high recycling rate no matter
with the gas or the liquid.
F. Easy to operate with the concise operating interface.
3) Specifications
A. Voltage input: AC220V±10％~50/60Hz
B. Compressor：12.12cm3
C. Vacuum pump: 7.2m3/h，10Pa
D. Load cells: ±10g
E. Tank: 12L
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F. Oil bottle: 250ml,double
G. Working pressure: max. 20bar
H. HP gauge: -1bar~3.5MPa
I. 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. Vacuum
E. New oil filling
F. Recharging
2) Subsidiary functions
A. Refrigerant supplying
B. Load cell calibration
C. Recharging tank exchanging procedure
D. Maintenance procedure for dry filter
E. Alarms
F. Parameters setting
G. Parameters inquiring
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3. Operation
1) Parts descriptions
HP gauge
New oil bottle
Used oil bottle
Operation panel
Displayer
LP gauge
Switch for used oil discharge
Switch for new oil adding
HP port
Auxiliary Port
P gauge
Window
LP port
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2) First use
A、Unscrew the electronic scale support screw before using the equipment.
B、Please supply about 4 kg refrigerants into the tank of equipment so that all
of the functions can be run normally.
C、Fix the refrigerant tank (Recharging tank) on the load cell.
From the back.
Unscrew the
support screw.
Parameter increase key
Parameter increase key
Enter key
Recovery key
Min indicator
Kg indicator
LED displayer
Vacuum key
Recharge key
Start key
Stop key
Recharging Tank indicator
Flush key
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1st 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.
2nd Open the valve of the refrigerant tank and place it upside down on the load cell pan.
3rd Fix it with the accessories.
Note: If you need not using the auxiliary load cell, please fix it as the manufactory.
Warning: Non-pedal the auxiliary load cell!
D、Please read this user manual carefully before operating.
3) Recovery/Recycling
A、Pres key to select the Recovery/Recycling function:
B、The LED displays the weight of refrigerant in the cleaning tank (internal
tank).
C、Presses “START” key to run.
D
、
It will stop running and discharge the used oil automatically when the
recovery/recycling process finish.
Note: also be able to discharge the used oil by press the switch.
E、During the running process, if it displays a code as F00-, please refer to
the APPENDIX: ALARM CODE TABLE.
4) Preparations before Flushing
A、To check if there has enough refrigerant in the tank. The volume should be
4~6 kg.
B、Empty the used oil bottle.
C、Check the automotive A/C system. If there has any leakage, it must be
repaired firstly to avoid refrigerant leak during flushing process.
D、Check if the automotive air-conditioning can run normally.
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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.
B、Turn off the automotive air conditioning.
Warning: do not start the air conditioning during the flushing process!
Otherwise, it easily causes damages to the air-conditioning and risk
of accident!
C、Press key to select the “Recovery/Flushing” function.
D、The LED displays the flushing time.
E、Set the flushing time by pressing “+” or “-” key and press “ENTER” key to
conform it. In order to achieve good flushing performance, the flushing
time should be more than 30 minutes. Normally, the good flushing time is
about 45 minutes for car.
Note: The flushing time does not include the time of recovery
process. Once the flushing is finished, the machine will run the
recovery function automatically.
F、Press “START” key to run the function.
G、Then the forward flushing, reverse flushing and pulse flushing will be
run.
H、If it displays code as F00- during the process, please refer to the
APPENDIX: ALARM CODE TABLE.
I、After flushing process finished, the recovery process run automatically.
J、When the whole process finished, it drain the used roil automatically.
Notice: it’s normal for that there have action sound of the solenoid
valve during the working process. Please do not stop it.
6) Vacuum
A、Press key to select the vacuum function.
B、The LED displays the vacuum time.
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