background image

6.    FOLLOWING SYMPTOMS ARE NOT AIR
       CONDITIONER TROUBLES

Symptom 1: The system does not operate 

Symptom 2: Change into the fan mode during 

                      cooling mode        

                       

Symptom 3: White mist comes out of a unit 

Symptom 4: Noise of air conditionerscooling  

The air conditioner does not start immediately after the ON/OFF 
button on the romote controller is pressed. 
If the operation lamp lights, the system is in normal condition.To 
prevent  overloading  of  the  compressor  motor,  the  air 
conditioner starts 3 minutes  after  it  is turned ON.

If  the  operation  lamp  and  the  "PRE-DEF  indicator(cooling  and 
heating  type)  or  fan  only  indicator(cooling  only  type)"  light,  it 
means you choose the heating model, When just starting, if the 
compressor has not started, the indoor unit  appears "anti cold 
wind" protection because of too low outlet temperature.

In  order  to  prevent  the  indoor  evaporator  frosting,  the  system 
will change into fan mode automatically, restore to the cooling 
mode will be done automatically after.

Symptom 3.1: Indoor unit 

 Symptom 3.2:  Indoor unit, outdoor unit 

Symptom 4.1: Indoor unit 

When humidity is high during cooling operation If the interior of 
an  indoor  unit  is  extremely  contaminated,  the  temperature 
distribution  inside  a  room  becomes  uneven.  It  is  necessary  to 
clean  the  interior  of  the  indoor  unit. Ask  your  dealer  for  details 
on cleaning the unit. This operation requires a qualified service 
erson 

When  the  system  is  changed  over  to  heating  operation  after 
defrost  operation  Moisture  generated  by  defrost  becomes 
steam and is exhausted.   

Symptom 4.2:  Indoor unit, outdoor unit  

A  continuous  low  hissing  sound  is  heard  when  the  system  is  in 
operation.  
This  is  the  sound  of  refrigerant  gas  flowing  through  both  indoor 
and outdoor units.  
 
A hissing sound which is heard at the start or immediately after 
stopping operation or defrost operation.  
This  is  the  noise  of  refrigerant  caused  by  flow  stop  or  flow 
change.  

A  continuous  low  hissing  sound  is  heard  when  the  system  is  in 
cooling operation or at a stop. 
When the drain pump (optional accessories) is in operation,this 
noise is heard.

A squeaking sound is heard when the system stops after heating 
operation. 
Expansion  and  contraction  of  plastic  parts  caused  by 
temperature change make this noise. 

Symptom 4.3: Outdoor unit  

When the tone of operating noise changes.  
This noise is caused by the change of frequency. 

Symptom 5: Dust comes out of the unit  

Symptom 6: The units can give off odours 

When the unit is used for the  first time in a long time. 
This is because dust has got into the unit.

The  unit  can  absorb  the  smell  of  rooms,  furniture,  cigarettes, 
etc., and then emit it again.  

Symptom 7: The outdoor unit fan does not        

                      spin. 

During operation. The speed of the fan is controlled in order to 
optimize unit operation. 

When the room temperature drops to the set temperature, the 
compressor turns off and the indoor unit changes to fan mode; 
when the temperature rises up, the compressor starts again. It 
is same in the heating mode.

owner’s manual 

13 

Maintenance after a long stop period 

 

(eg. at the beginning of the season)

  

Check  and  remove  everything  that  might  be  blocking  inlet 
and outlet vents of indoor units and outdoor units. 
 
Clean air filters and casings of indoor units.  
Refer  to  "Cleaning  the  air  filter"  for  details  on  how    to 
proceed and make sure to install cleaned air filters back in 
the same position.  
 
Turn  on  the  power  at  least  12  hours  before  operating  the 
unit in order to ensure smoother operation. As soon as he 
power is turned on, the remote controller  displays appear. 

Digital scroll central air conditioning 
auxiliary heating equipment

In winter, due to the difference of the area and building 
construction, please purchase the indoor unit with auxillary
heating to enlarge the capacity. 

When turning to the heat mode the air conditioner with 
auxiliary heating will run at the set term.

It’s not advised to auxiliary heating equipments on site for 
4-way cassttte type and duct/celling type(with auxiliary 
heating).

Summary of Contents for VRF series

Page 1: ...SYSVRF Indoor unit VRF Indoor units OWNER MANUAL GB...

Page 2: ...egarding the connection systems available If electrical appliances are disposed of in landfills or dumps hazardous substances can leak into the ground water and get into the food chain damaging your h...

Page 3: ...llow children to play on the outdoor unit or avoid placing any object on it Falling may result in injury Do not operate the air conditioner when using a room fumigation type insecticide Failure to obs...

Page 4: ...dust in the intake air Grounding Screw In the control box Air Intake Air Out Air Out Louver Adjust the air Aout direction Fig 2 4 Fig 2 7 Fig 2 8 Fig 2 9 Air return grille Induced air decoration Dust...

Page 5: ...let pipe Electric control box Fig 2 10 Fig 2 11 Fig 2 12 Fig 2 14 4 Low static pressure type Air Outlet Connect the duct Grounding Screw In the control box Control Box Air Intake Intake room air Air F...

Page 6: ...and effective operation The Max operation temperature for the air conditioner Cooling Heating 3 AIR CONDITIONER OPERATIONS AND PERFORMANCE Cooling operation Heating operating cooling only type withou...

Page 7: ...the difference of the room temperature The louver direction Choose horizontal outlet mode when cooling operation When the cooling operation the air flow down will cause condensing dew on the air outle...

Page 8: ...down when the air flow is down Horizontal louver Less than 40 2 The slant angle of horizontal louver must be Less than 40 otherwise condensation drops may occur vertical louver vertical louver When ad...

Page 9: ...he horizontal louver with hands or malfunction may occur Adjust it with the swing button on the wire controller 1 2 3 Ceiling floor type Auto swing Press SWING button the louver will swing up and down...

Page 10: ...attern depending on the operating mode situation During Dry mode so that cold air does not come into direct contact with people air is blown upper air outlet Regardless of the operating mode or situat...

Page 11: ...se If the air conditioner is positioned in a dusty place the cleaning frequency of the air filter must be increased If the accumulated dust is too heavy to be cleaned please replace the filter with a...

Page 12: ...in version I proceed as followed Fig 5 9 Fig 5 10 Take off the inlet grille from the panel Air Outlet Selection Switch special function filter For Console Type Push the grille switches to the arrow d...

Page 13: ...e Fig 5 15 Fig 5 16 12 owner s manual Inlet grille According to the figure shown in the position and direction of arrow press the filter and take it down In the same way take down the filter on the ot...

Page 14: ...top or flow change A continuous low hissing sound is heard when the system is in cooling operation or at a stop When the drain pump optional accessories is in operation this noise is heard A squeaking...

Page 15: ...Doors and windows are open Direct sunlight Too much heat resource Outdoor temp is too high Leakage of refrigerant or lack of refrigerant Wait for the comeback of power Switch on the power Replace the...

Page 16: ...signal receiver of the indoor unit and then repeatly push the ON OFF button twice The indication on the display disappears after a lapse of time Check whether the timer operation has come to an end wh...

Page 17: ...alfunctions disappear it restores automatically When the indoor unit is replaced with a correct one or is turned off the alarm will disappear Table 7 4 NO Type Contents Display content Remarks Room te...

Page 18: ...SYSVRF indoor units_OM EN April 2014 202000191029 WP MDV03U 011PW...

Reviews: