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Multi Variable Air Conditioners Fresh Air Series Indoor Unit

8 Troubleshooting

If your air conditioner is not working well, please check the following table first before

asking for service:

Phenomenon

Troubleshooting

The unit can’t start

①

. Power supply is not connected

②

. Circuit breaker tripping caused by leakage of electricity

③

. Input voltage is too low

④

. Operation button is off

⑤

. Error of control loop

The unit stops after running for a

while.

①

. There is obstacle in front of condenser

②

. Error of control loop

③

. Perform cooling when outdoor ambient temperature is higher than 43

℃

(109

℉

)

Poor cooling effect

①

. The filter is dirty or blocked

②

. Too heavy heat load of room(e.g. too many people)

③

. Door or windows is open

④

. Air inlet and outlet of IDU are blocked

⑤

. Set temperature is too high or refrigerant leaks

⑥

. The performance of room temperature sensor gets worse

Poor heating effect

①

. The filter is dirty or blocked

②

. Door or window is open

③

. Set temperature is too low

④

. Refrigerant leaks

⑤

. Outdoor ambient temperature is lower than -5

℃

(23

℉

)

⑥

. Error of control circuit

Indoor fan doesn’t start

up during heating

①

. Position of tube temperature sensor is improper

②

. Tube temperature sensor is not inserted well

③

. Wiring of tube temperature sensor breaks off

④

. Electrical leakage of capacitor

NOTICE!

If air conditioner still fails to work normally after checking and handling as described

above, please stop using it immediately and contact local service center for assistance.

Содержание GMV-NDX42P/A-T

Страница 1: ...Manual Original Instructions Commercial Air Conditioners Multi Variable Air Conditioners Fresh Air Series Indoor Unit Models GMV NDX42P A T U GMV NDX48P A T U GMV NDX54P A T U GMV NDX72P A T U GMV NDX96P A T U ...

Страница 2: ...he following items and contact our authorized service centers as soon as possible Nameplate model cooling capacity product code ex factory date Malfunction status detail description of conditions before and after malfunction occurs 6 All units have been strictly tested and proved to be qualified before ex factory To avoid unit damage or even operation failure which may be caused by improper disass...

Страница 3: ...Installation and Test of Drain Pipe 12 4 4 Installation of Air Duct 15 4 5 Installation of Wired Controller 17 5 Wiring Work 17 5 1 Connection of Wire and Patch Board Terminal 18 5 2 Power Cord Connection 18 5 3 Connection of Communication Line of IDU and ODU 19 5 4 Connect Communication Wire of Wired Controller 19 5 5 Illuminate for Connection of Wired Controller and Indoor Units Network 20 6 Rou...

Страница 4: ...the unit or cut off the power supply before cleaning the unit otherwise electric shock or injury may happen 15 Never spray or flush water towards unit otherwise malfunction or electric shock may happen 16 Do not expose the unit to the moist or corrosive circumstances 17 Under cooling mode please don t set the room temperature too low and keep the temperature difference between indoor and outdoor u...

Страница 5: ... different selected air volume there are two kinds of connection method for the VRF fresh air series indoor unit 1 If the selected air volume 1471 CFM connect with normal indoor units by blow method or connect with the fixed outdoor unit as shown in 2 Model of Indoor Unit Model of Outdoor Unit GMV NDX42P A T U Connecting condition with GMV WM B F U series modular outdoor unit The total capacity of...

Страница 6: ...X96P A T U 2 2 Rated Working Condition Indoor Side Condition Outdoor Side Condition Dry Bulb Temp Wet Bulb Temp Dry Bulb Temp Wet Bulb Temp Rated Cooling 35 C 95 F 28 C 82 F 35 C 95 F 28 C 82 F Rated Heating 7 C 45 F 6 C 43 F 7 C 45 F 6 C 43 F 2 3 Working Temperature Range Outdoor Ambient Dry Bulb Working Temperature Range 7 C 45 C 19 F 113 F NOTICE The ex factory set temperature is 18 C 64 F in c...

Страница 7: ...he refrigerant pipe 4 M10 Nut Nut with Washer M10X8 4 PC To be used together with the hanger bolt for installing the unit 5 M10 Nut M10X8 4 8 PC To be used together with the hanger bolt for installing the unit 6 M10 Washer Spring Washer M10X2 6 4 PC To be used together with the hanger bolt for installing the unit 7 M10 Washer M10XΦ30X 2 5 4 PC To be used together with the hanger bolt for installin...

Страница 8: ...ain water out easily 4 There is no obstacle at inlet or outlet Please ensure good air circulation 5 In order to make sure the space for maintenance please install the indoor unit according to the dimension described below 6 Keep the unit away from heat source inflammable gas or smoke 7 This is a concealed ceiling type unit 8 This series indoor unit can be allowed to supply air for only one room 9 ...

Страница 9: ...ent children touching the unit 3 3 Requirements for Communication Line NOTICE If the unit is installed in the place with strong electromagnetic interference shielded wire must be applied on the communication wire between indoor unit and wired controller Twisted pair line with shielding function must be applied on the communication wire between indoor unit and indoor unit outdoor unit 3 3 1 Select ...

Страница 10: ...08 230V 1Ph 60Hz 1 7 15 GMV NDX72P A T U 208 230V 1Ph 60Hz 6 3 15 GMV NDX96P A T U 208 230V 1Ph 60Hz 6 3 15 1 Specification of circuit breaker and power cord is selected on the basis of unit s maximum power max current 2 Specification of power cord is based on the working condition where ambient temperature is 40ºC 104 and multi core cable with copper conductor working temperature is 90 ºC 194 e g...

Страница 11: ... selection requirements Power cord size is based on BV single core wire 2 4pc at 40 104 F Cambient temperature when laying across plastic pipe Air switch is D type and used at 40 C 104 F If actual installation condition varies please lower the capacity appropriately according to the specifications of power cord and air switch provided by manufacturer Install cut off device near the unit The minimu...

Страница 12: ...62 7 32 300 11 13 16 754 29 11 16 1400 55 1 8 700 27 9 16 Fig 4 1 2 Below are dimensions of A B C etc for different models Unit mm in Item Model A B C D E F G H I GMV NDX54P A T U 1353 53 1 4 632 24 7 8 992 39 1150 45 1 4 192 7 1 2 327 12 7 8 1483 58 3 8 791 31 1 8 385 15 3 16 GMV NDX72P A T U 1353 53 1 4 632 24 7 8 992 39 1150 45 1 4 192 7 1 2 327 12 7 8 1483 58 3 8 791 31 1 8 385 15 3 16 GMV NDX...

Страница 13: ...rding to the 4 spots on the paper pattern The punching diameter may refer to the diameter of expansion bolt about 60mm 2 3 8in to 70mm 2 3 4in depth as shown in Fig 4 1 4 Fig 4 1 3 Fig 4 1 4 2 Insert the expansion bolt M10 into the hole and then drive the iron nail into the bolt as shown in Fig 4 1 5 NOTICE The length of bolt can be based on the height of room Bolt should be prepared by the user F...

Страница 14: ...nt After the indoor unit is installed remember to check the horizontal status of the whole unit It should be horizontal from front to back and slant 1 from left to right following the drainage direction as shown in Fig 4 1 7 Fig 4 1 7 4 2 Pipe Connection 1 Direct the flaring of copper pipe to the center of screwed connection and then screw the flaring nut tight as shown in Fig 4 2 2 Use a torque w...

Страница 15: ...hen connecting the pipe insert the end of PVC pipe into the drain hole and then tighten it up with a drain hose and cable tie Do not use adhesives to connect drain hole and drain hose When the drain pipe is used for several equipments the shared pipe should be about 100mm lower than the drain hole of each equipment In this case use thicker pipe Fig 4 3 1 4 3 2 Drainage pipe installation 1 Insert t...

Страница 16: ...rain pipe use water sealed joint Fig 4 3 5 6 Install the trap as shown in following Fig 4 3 6 Fig 4 3 6 7 Install one trap for each unit 8 Convenience for cleaning trap in the future should be considered when installing it 9 The horizontal pipe can be connected to vertical pipe in the same level please select the connection way as shown in following fig NO1 Connection of drainage pipe joints Fig 4...

Страница 17: ...m 39 3 8 59in Fig 4 3 10 4 3 3 Test of Drainage System 1 Please test drainage system after electric work is finished Inject approximately 1L purified water to drain pan from air vent ensure that not to splash the water over the electrical components e g water pump etc 2 During the test please carefully check the drainage joint make sure no any leakage occur 3 It s strongly recommend to do the drai...

Страница 18: ...air duct should be well sealed in order to prevent air leakage The design and construction of air duct should comply with national requirements The edge of air return duct is suggested to be more than 150mm 5 7 8in away from the wall Add afilter to the air return opening Please consider noise damping and vibration damping for the design and construction of air duct Besides noise source must be awa...

Страница 19: ...r Duct Fig 4 4 2 No Name No Name 1 Fresh Air Duct 6 Transition Pipe 2 Canvas Duct 7 Supply Air Duct 3 Fresh Air Blinds 8 Diffuser 4 Hanger Rod 9 Diffuser Connector 5 Supply Air Outlet 4 4 2 Shape and Size of Air outlet and Air return Opening Fig 4 4 3 Air Outlet Fig 4 4 4 Air Return Opening ...

Страница 20: ...ould be replaced by exclusive cable 5 All the electrical work should be performed by professional personnel as per local law regulation and this manual 6 Connect the unit to the special earthing device and make sure the unit is earthed soundly 7 Air switch and circuit breaker is required to be set Air switch should have both magnetic trip and thermal trip functions so as to protect the unit when s...

Страница 21: ...he terminal 2 The connection of stranded wire as shown in fig 5 1 2 1 Strip about 10mm 3 8in insulation of the end of stranded wire by stripping and cutting tool 2 Loosen the wiring screws on terminal board 3 Insert the wire into the ring tongue terminal and tighten by crimping tool 4 Use the screwdriver for tightening the terminal Fig 5 1 1 Fig 5 1 2 5 2 Power Cord Connection 1 Every unit should ...

Страница 22: ...s 3 Connect the communication wire to terminal D1 and D2 of indoor 4 bit wiring board as shownin fig5 3 1 4 Fix the communication cable with clamp of electric box 5 For more reliable communication make sure connect the terminal resistor to the most downstream IDU of the communication bus terminal D1 and D2 as shown in fig 5 3 2 terminal resistor is provided with each ODU Fig 5 3 1 Fig 5 3 2 5 4 Co...

Страница 23: ... 4 1 Fig 5 4 2 2 Fig 5 4 2 shows the installation of remote controller 3 Wired controller and receiving light board can be installed at the same time When operating through a remote controller both wired controller and the receiving light board can receive the signals as shown in Fig 5 4 3 Fig 5 4 3 5 5 Illuminate for Connection of Wired Controller and Indoor Units Network 1 Communication wire of ...

Страница 24: ...door unit cannot share the same wired controller with other types of VRF indoor unit When two wired controllers are controlling the indoor units you need to set an address for each wired controller Address No 1 refers to master wired controller while address No 2 refers to sub master wired controller They should not share the same address For specific setting methods please refer to installation m...

Страница 25: ...IDU Use a vacuum cleaner to remove dust If the filters are dirty wash them with warm water and mild detergent and dry the filters in the shade 2 If the unit used in the environment with much dust please clean it regularly usually once every two weeks 6 2 Maintenance before the Seasonal Use 1 Check if the air inlet and air outlet of indoor and outdoor unit are blocked 2 Check if securely grounded 3...

Страница 26: ...er Full Protection d1 Indoor Unit PCB Error dC Capacity DIP Switch Setting Error L4 Wired Controller Power Supply Error d3 Ambient Temperature Sensor Error dL Outlet Air Temperature Sensor Error L5 Freeze protection d4 Inlet Pipe Temperature Sensor Error dE Indoor Unit CO2 Sensor Error L7 No Master Indoor Unit Error d6 Outlet Pipe Temperature Sensor Error dy Water Temperature Sensor Error L8 Power...

Страница 27: ... or blocked Too heavy heat load of room e g too many people Door or windows is open Air inlet and outlet of IDU are blocked Set temperature is too high or refrigerant leaks The performance of room temperature sensor gets worse Poor heating effect The filter is dirty or blocked Door or window is open Set temperature is too low Refrigerant leaks Outdoor ambient temperature is lower than 5 23 Error o...

Страница 28: ......

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