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Multi Variable Air Conditioners WALL Mounted Type Indoor Unit 

13 

9 Malfunction Analyzing 

WARNING

 

Do not repair the air conditioner by yourself for the incorrect repair would lead to electric shock or fire. Please 
contact the service center and have the unit repaired by the specialized personnel. Check the following items 
before contacting the service center, as it could save your time and cost. 

Malfunction Phenomena 

Malfunction Analyzing 

The air conditioner could not start up 
just after turned off 

The over load protection switch of the unit makes it run after 3 
minutes delay 

Odor gave out when the unit just 
was turned on 

Odors or cigarette smoke which has been absorbed in is discharged out. 

Slight bicker was heard when the 
unit was running 

This is the sound of the running refrigerant 

Mist came from the air outlet vent 
when cooling 

Indoor air is cooled rapidly 

Creak sound was heard when the 
unit was running or after it was 
turned off 

It is the sound emitted by the expansion of the panel and other parts 
because of the temperature change. 

The air conditioner failed to run 

Is the power supply cut off ? 
Is the power supply connected ? 
Is the circuit protector started aside ? Is the voltage too high or too low ?  
If TIMER had been set on the wireless remote controller ? 

The cooling (heating) effect of the air 
conditioner was not good 

Is the temperature set properly ? 
Is the inlet, outlet vent of the outdoor unit blocked ? 
Is the air filter too dirty to cause blockage ? 
Are windows and doors closed ? Is the air speed too low ? 
Is there other heat source in the room ? 

The wireless remote controller 
cannot work 

In the event that the battery is replaced but the wireless remote control 
still malfunctions, then open the back cover and press 
”ACL” button to make it normal. 
When the air conditioner is under abnormal interference or its functions 
are changed too frequently, then the wireless remote controller would 
works improperly. At this time, it is available to resume the normal 
operation through de-energizing and then energizing the wireless 
controller again. 
Is the controller within the receiving area? or is there blockage? Check if 
the voltages of batteries in the wireless remote controller are sufficient; 
Otherwise change the batteries. 

9.1 Service center 

When the following phenomena appeared, please stop operating immediately, cut off the 

main power supply of the unit and then contact the service center of the air conditioner. 

Harsh sound heard when running;

The fuse or protector opened frequently;

Substance or water pulled in the unit involuntarily;

Water leakage in room;

Power cord overheated;

Abnormal odor is given out when running.

Summary of Contents for VRF VEHW007C432P

Page 1: ...il GD Large Fan Coil HS AH Air Handler OA Outside Air Evaporator Types Thank you for selecting LENNOX air conditioners Please read this manual carefully before operation and keep it for further refere...

Page 2: ......

Page 3: ...ers should well keep this manual 6 If this unit fails to operate normally please contact our service center as soon as possible and provide the following information 1 Content on the name plate model...

Page 4: ......

Page 5: ...Connect Cables and Terminals of Wiring Board 7 5 2 Power Cord Connection 8 5 3 Connection of Communication Line of IDU and ODU 8 5 4 Connection of Communication Line of Wired Controller 9 5 5 Illumina...

Page 6: ...ipment is used 10 Never start up or shut off the air conditioner by means of directly plug or unplug the power cord 11 Turn off the unit after it runs at least five minutes otherwise it will influence...

Page 7: ...oft cloth with a little neutral detergent to clean the outer casing of unit 26 If anything abnormal happens such as burning smell please power off the unit and cut off the main power supply and then i...

Page 8: ...unctioncaused by the unit that is not installed by the Lennox appointed service center would probably not be dealt with on time because of the inconvenience of the business contact 3 It should be guid...

Page 9: ...communication line for indoor unit and indoor unit outdoor unit Fig 3 2 2 Material Type Total Length L m feet of Communication Cable between Indoor Unit and Indoor Outdoor Unit Wire size mm 2 AWG Mat...

Page 10: ...city appropriately according to the specifications of power cord and air switch provided by manufacturer 4 Install cut off device near the unit The minimum distance between each stage of cut off devic...

Page 11: ...door unit automatically Then you can reset the master indoor unit by remote controller or wired controller 4 3 1 Setting by remote controller Point the remote controller at the light board or wired co...

Page 12: ...out the wiring work incorrect wiring could cause malfunction or even damage the unit 3 The unit should be powered by independent circuit and specific socket 4 The wiring should be in accordance with...

Page 13: ...for tightening the terminal Fig 5 1 1 Fig 5 1 2 5 2 Power Cord Connection NOTICE All indoor units must be unified of power supply so that they can be powered ON OFF at the same time Fig 5 2 For units...

Page 14: ...Controller and Indoor Units Network 1 Communication wire of indoor unit and outdoor unit or indoor unit is connected to D1 D2 2 Wired controller is connected to H1 H2 3 One indoor unit can connect two...

Page 15: ...roperly in proper to prevent electricity wasting It is better tocontrol the difference of the indoor and outdoor temperatures within 5 C 41 F 2 The better effect will be maintained by adjusting the gu...

Page 16: ...ows to take down the panel 2 Clean the panel Clean it with a soft hair brush water and neutral cleaning fluid and then dry it 3 Install the panel As shown in Fig II install the stands of both ends of...

Page 17: ...e season 1 Clean filter and body of air conditioner 2 Cut off the main power supply of air conditioner 8 Table of Error Codes for Indoor Unit Error Code Content Error Code Content Error Code Content L...

Page 18: ...If TIMER had been set on the wireless remote controller The cooling heating effect of the air conditioner was not good Is the temperature set properly Is the inlet outlet vent of the outdoor unit bloc...

Page 19: ...te controller can make the guide louver swing up and down or makes the guide louver stop at a certain angle to have air supplied 2 Press the SWING button on the wireless remote controller to make the...

Page 20: ...t us at 1 305 718 2901 LennoxGlobalHVAC Lennoxintl com C 2016 Lennox Industries Inc For a complete list of the registered and common law trademarks owned by Lennox Industries Inc please visit www lenn...

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