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Multi Variable Air Conditioners Compact Cassette Type Indoor Unit 

20 

Error 

Code 

Content 

Error 

Code 

Content 

Error 

Code 

Content 

L7 

No Master Indoor Unit 

Error 

d6 

Outlet Pipe 

Temperature Sensor 

Error 

dy 

Water Temperature 

Sensor Error 

L8 

Power Insufficiency 

Protection 

d7 

Humidity Sensor Error 

C0 

Communication Error 

L9 

Quantity Of Group 

Control Indoor Units 

Setting Error 

d8 

Water Temperature 

Error 

AJ 

Filter Cleaning 

Reminder 

db 

Special Code: Field Debugging Code 

8 Troubleshooting 

The air conditioner is not expected to be serviced by users. Incorrect repair may cause electric 

shock or fire, so please contact an authorized service center for professional service. The following 

checks prior to contact may save your time and money. 

Phenomenon 

Troubleshooting 

The unit can’t start 

  Power supply is not connected 

  Circuit breaker tripping caused by leakage of electricity 

  Input voltage is too low 

  Operation button is off 

  Error of control loop   

The unit stops after running 

for a while 

  There is obstacle in front of condenser 

  Error of control loop 

  Perform cooling when outdoor ambient temperature is higher 

than 43°C(109°F) 

Poor cooling effect 

  The filter is dirty 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°C(23°F) 

  Error of control circuit 

Indoor fan doesn’t start 

up during heating 

  Position of tube temperature sensor is improper 

  Tube temperature sensor is not inserted well 

  Wiring of tube temperature sensor breaks off 

  Electrical leakage of capacitor 

  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-ND07T/B-T

Страница 1: ...anual Original Instructions Commercial Air Conditioners Multi Variable Air Conditioners Compact Cassette Type Indoor Unit Models GMV ND07T B T U GMV ND09T B T U GMV ND12T B T U GMV ND15T B T U GMV ND1...

Страница 2: ...l 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 nameplate model number cooling...

Страница 3: ...turer 3 After verification the defect of product is directly caused by corrosive gas 4 After verification defects are due to improper operation during transportation of product 5 Operate repair mainta...

Страница 4: ...Drainage System Testing 9 4 4 Panel Installation 12 4 5 Installation of Wired Controller 14 5 Wiring Work 14 5 1 Connection of Wire and Patch Board Terminal 15 5 2 Power Cord Connection 15 5 3 Connec...

Страница 5: ...ply before cleaning the unit otherwise electric shock or injury may happen 16 Never spray or flush water towards unit otherwise malfunction or electric shock may happen 17 Do not expose the unit to th...

Страница 6: ...Side Condition Outdoor Side Condition Dry Bulb Temp C F Wet Bulb Temp C F Dry Bulb Temp C F Wet Bulb Temp C F Rated Cooling 26 7 80 19 4 67 35 95 24 75 Rated Heating 21 1 70 15 6 60 8 3 47 7 1 45 3 Pr...

Страница 7: ...should be able to withstand the weight of unit 2 The water can be drained conveniently from drainage pipe 3 There should be no obstruction near air inlet and air outlet 4 Follow the installation dista...

Страница 8: ...nication cable must be adopted 3 3 1 Select Communication Line for Indoor Unit and Wired Controller Fig 3 3 1 Material type Total length of communication line between indoor unit and wired controller...

Страница 9: ...s necessary to use shielded wire 3 4 Wiring Requirement Power Cord Size and Air Switch Capacity Model Power Supply MCA A MOP A GMV ND07T B T U 208 230V 1ph 60Hz 2 15 GMV ND09T B T U 2 15 GMV ND12T B T...

Страница 10: ...T U GMV ND12T B T U GMV ND15T B T U GMV ND18T B T U 670 26 3 8 570 22 7 16 570 22 7 16 495 19 1 2 600 23 5 8 4 1 2 Suspend the Indoor Unit 1 Drill bolt holes and install bolts 1 Stick the reference c...

Страница 11: ...nd lower sides of the hanger bracket The washer fixing plate will prevent the washer from falling 3 The usage of paper pattern Refer to paper pattern of installation for ceiling opening dimension The...

Страница 12: ...flaring port of copper pipe at the center of screwed joint and then tighten the flaring nut with hand as shown in fig 4 2 1 2 Use a torque wrench to tighten up the flaring nut until the wrench gives o...

Страница 13: ...qual to the diameter of drainage pipe joint 6 Install drainage pipe according to the following Fig 4 3 1 and arrange insulation to the drainage pipe Improper installation may lead to water leakage and...

Страница 14: ...he unit Unit mm inch Fig 4 3 2 Drainage pipes assembled by T shaped joints 8 The horizontal pipe can t be connected to vertical pipe in the same level please select the connection way as shown in foll...

Страница 15: ...g the installation distance from soft drain pipe to the gasket is C when the bolt is tightened It is not allowed to apply PVC or other related glue in the joints of two ends of drain pipe Fig 4 3 8 Un...

Страница 16: ...fter 60s of energizing In this case the water pump operates automatically Check if the water pump drains normally through drainage port The water pump will stop automatically after running for 10mins...

Страница 17: ...he panel direction so as to keep the mark and fittings on the same corner as shown in Fig 4 4 4 Fig 4 4 4 2 Temporality hang the panel to body there are four hangers on each corner of the panel hang t...

Страница 18: ...or it may cause electric shock 2 Please carefully read the wiring diagram before carry out the wiring work incorrect wiring could cause malfunction or even damage the unit 3 The unit should be powere...

Страница 19: ...ch 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...

Страница 20: ...g board as shown in Fig 5 3 1 Fig 5 3 1 Fig 5 3 2 4 Fix the communication cable with clamp of electric box 5 For more reliable communication make sure connect the terminal resistor to the most downstr...

Страница 21: ...munication 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 wired controllers that must be set as ma...

Страница 22: ...Multi Variable Air Conditioners Compact Cassette Type Indoor Unit 18 Fig 5 5 1...

Страница 23: ...air outlet of indoor and outdoor unit are blocked 2 Check if securely grounded 3 Check if all the power cord and communication cable are securely connected 4 Check if any error code displayed after en...

Страница 24: ...too low Operation button is off Error of control loop The unit stops after running for a while There is obstacle in front of condenser Error of control loop Perform cooling when outdoor ambient temper...

Страница 25: ...21...

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