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13

 

 

7.2

  Faults and treatment 

Item 

Possible reasons 

Fault handling 

Temp. sensor 

failures 

The sensor has not been 

connected correctly 

Check the circuit connectors

and connect it again 

The sensor is 

damaged

 

Change the sensor 

high Temperature 

alarm 

The condenser or evaporator is 

dirty and blocked 

Clean the condenser or evaporator 

Refrigerating capacity isn’t 

enough 

Please consult usability professional 

The temperature setting is fault  Set the temperature again 

Frequent high 

system pressure 

alarm 

The condenser or evaporator is 

dirty and blocked 

Clean the condenser or evaporator 

External fan is fault 

Change the fan 

Condenser temperature sensor 

wrongly sends alarm 

Change the condenser temperature sensor 

Evaporator

-frozen 

alarm 

Internal cycling path is blocked 

Check if there are block to stick the internal 

cycling path 

Internal fan is fault 

Maintain or change it 

Refrigerating system can’t stop 

Check if the air-conditioner reaches the 

refrigeration stop conditions but the actual status 

doesn't stop, if yes, inform the AC maker to deal 

with it. 

Evaporator temperature sensor 

wrongly sends alarm 

Change the evaporator temperature sensor 

Compressor can’t 
run 

There is no cooling demand 

Check if refrigeration is not needed 

Within shutdown delay 

Check if compressor is protected 

Compressor line has not been 

connected correctly 

Check the compressor line

and connect it again 

Compressor protect switch or 

motor is fault   

Check if compressor protect switch is ok, and 

change compressor protect switch if fault; if motor 

is fault, change the compressor 

Internal fan can’t 
run 

Internal fan is fault 

Change the fan 

Internal fan line has not been 

connected correctly 

Check the Internal fan line

and connect it again 

External fan is stuck 

Check if there are block to stick the fan or not, and 

clear the block 

Summary of Contents for MGA0800/A1

Page 1: ...innovation We share Before using the product please be sure to read the manual carefully Be sure to keep this manual properly so that you can access it at any time in the future On the basis of fully understanding the content please use it correctly ...

Page 2: ...g 6 3 2 Mechanical installation 6 3 3 Electrical installation 7 4 Product function 8 4 1 Cooling 8 4 2 Heating Optional 8 4 3 Remote monitor 8 4 4 The control of external fan Optional 8 5 Display screen 9 5 1 Display interface 9 5 2 Menu structures 10 5 3 Display 11 5 4 Start self test 11 6 Running 11 6 1 Check before start running 11 6 2 Start running 12 7 Faults and treatment 12 7 1 Alarm inform...

Page 3: ...2 8 Maintenance 14 ...

Page 4: ...ronment temperature and which should be isolated internally and externally completely This product has multiple functions high reliability and has the feature that it can start to work without complex debugging after powering The fan in the internal cycle air path absorbs the hot air from the upside to make air heat exchange by evaporator fins and sends the cooled air from the downside of the air ...

Page 5: ...lling devices for Communication outdoor room 1st parts Embedded temperature controlling devices 08 EN 55022 2006 A1 2007 Conducted Emission and radiation test 09 EN 61000 3 2 2006 A2 2009 Harmonic Current 10 EN 61000 3 3 2008 Voltage Fluctuation and Flicker 11 EN 61000 4 2 2009 ESD 12 EN 61000 4 3 2006 Radiation disturbance Immunity Test 13 EN 61000 4 4 2004 Electrical Fast Transient Burst 14 EN 6...

Page 6: ...t voltage range 220 VAC 15 50Hz Refrigerating capacity L35 L35 W 800 Rated Refrigerating input power L35 L35 W 385 Rated Refrigerating current L35 L35 A 1 8 Maximum Refrigerating current A 2 6 Heat capacity optional W 500 Air Volume of Inner Circulation m3 h 240 2 2 Installation diagram Note the installation diagram is just for reference the specific installation scheme should be determined accord...

Page 7: ...o install the product immediately or it needs to be transported to other place please repack the air conditioner after the checking 4 It is recommended to recycle the unpacking materials 3 2 Mechanical installation Installation tool Phillips screwdriver Installation Steps 1 Choose cut location on the cabinet according to the holing diagram remove the shadow area and make the installation hole 2 Ma...

Page 8: ... Definition Live L power input cable L Null N power input cable N Earth PE Earth line 2 Alarm output and signal input port Item Port Definition RS485 communication interface RS485A RS485 communication ports RS485 communication interface RS485B RS485 communication ports The public alarm dry nod NO NO It is normally open if no alarm The public alarm dry nod COM COM common port The public alarm dry n...

Page 9: ...e cabinet is higher than heating stopping temperature it stops heating User parameter setting point Parameter Default value Setting range Unit Note Heating starting temperature 5 10 15 Heating stopping temperature Heating starting temperature Heating return difference Heating return difference 10 3 15 4 3 Remote monitor Air conditioner has an RS485 communication interface supporting MODBUS RTU com...

Page 10: ...y ventilation starting temperature emergency ventilation fans run when the temperature inside cabinet is lower than Emergency ventilation stopping temperature emergency ventilation fans stop Emergency ventilation function parameter Default value Setting range Unit starting temperature 45 28 50 stopping temperature 42 25 50 5 Display screen 5 1 Display interface NO Icon Function Function explanatio...

Page 11: ...ers of the code press SET to confirm and then enter the parameters interface and Press and to adjust the addition and subtraction of the parameters value And then press SET to confirm the parameter values changes if don t need to save adjusted parameters please press ESC Check the parameters Pressing or it will show T01 T02 T03 T04 in turn and the parameters can be shown several seconds later Show...

Page 12: ...turn difference setting Size 5 15 P07 Communication address setting Size 0 255 Code input interface User 001 Definition Icon Definition Icon Icon Definition 5 3 Display Under running the main interface 8 8 8 displays real temperature value in cabinet After boot in any interface if there has no keyboard operation in the continuous 60s automatically return to the main interface 5 4 Start self test I...

Page 13: ...arm conditions Reset output from dry contact High temperature alarm Temperature inside the cabinet is higher than the setting Automatic Yes Low temperature alarm Temperature inside the cabinet is lower than the setting Automatic No T1 temperature sensor alarm There is short or open circuit on the cabinet internal temperature sensor cable Automatic No T2 temperature sensor alarm There is short or o...

Page 14: ...he internal cycling path Internal fan is fault Maintain or change it Refrigerating system can t stop Check if the air conditioner reaches the refrigeration stop conditions but the actual status doesn t stop if yes inform the AC maker to deal with it Evaporator temperature sensor wrongly sends alarm Change the evaporator temperature sensor Compressor can t run There is no cooling demand Check if re...

Page 15: ...been connected correctly Check the external fan line and connect it again The operating condition has not been satisfied Check if the operating condition is satisfied 8 Maintenance Maintaining air conditioner very closely can keep it having a good performance and normal life the following works should be done No Check Maintain Cycle 1 Check whether there are alarm information or not 6 months 2 Che...

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