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Multi Variable Air Conditioners One-way Cassette Type Indoor Unit 

22 

7 Table of Error Codes for Indoor Unit 

Error 

Code 

Content 

Error 

Code 

Content 

Error 

Code 

Content 

L0 

Indoor Unit Error 

LA 

Indoor Units 

Incompatibility Error 

d9 

Jumper Cap Error 

L1 

Indoor Fan Protection 

LH 

Low Air Quality Warning 

dA 

Indoor Unit Network 

Address Error 

L2 

E-heater Protection 

LC 

ODU-IDU Incompatibility 

Error 

dH 

Wired Controller PCB 

Error 

L3 

Water 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 CO

2

 Sensor 

Error 

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. 

 Defect of main PC-board. 

The unit stops after 

running for a while. 

 The inlet or outlet of ODU or IDU are blocked by obstacle. 

Poor cooling effect 

 The filter is dirty. 

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

 Door or windows is open. 

 Inlet and outlet of IDU are blocked. 

 Setting temperature is too high. 

 Refrigerant is insufficient (e.g. refrigerant leakage). 

Poor heating effect 

 The filter is dirty. 

 Door or window is open. 

 Setting temperature is too low. 

 Refrigerant is insufficient (e.g. refrigerant leakage). 

Indoor fan doesn’t 

start up during 

heating   

 At starting, the IDU fan could not operate till the heat exchange become hot, for 

preventing delivering the cool air. 

 At defrosting, the IDU fan stopped due to system switch to cooling mode. For 

preventing delivering the cool air, and resume operating after defrosting. 

NOTE!

 

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

stop using it immediately and contact our designated dealer or local service center. 

Содержание GMV-ND22TD/A-T

Страница 1: ...Original Instructions Commercial Air Conditioners Multi Variable Air Conditioners One way Cassette Type Indoor Unit Models GMV ND22TD A T GMV ND28TD A T GMV ND36TD A T GMV ND45TD A T GMV ND50TD A T G...

Страница 2: ...used for long cut off the power supply please energize and preheat the unit in advance before reusing it 3 Please properly select the model according to actual using environment otherwise it may impac...

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: ...allation and Drainage System Testing 10 4 4 Panel Installation 13 4 5 Wired Controller Installation 15 5 Wiring Work 15 5 1 Connection of Wire and Patch Board Terminal 16 5 2 Power Cord Connection 16...

Страница 5: ...ected to other units that have been confirmed as complying to corresponding partial unit requirements of this international standard The electrical interface shall comply with electrical security requ...

Страница 6: ...s or objects into air outlet or air return grille If you use gas heater or petroleum heater in the same room please open the door or window to maintain good air circulation in case the room may lack o...

Страница 7: ...disconnection device which has at least 3mm clearances in all poles and disconnection must be incorporated in the fixed wiring in accordance with the wiring rules If the product needs to be installed...

Страница 8: ...r reference only please refer to the actual product the unit of dimension is mm 3 1 Standard Fittings Use the following provided accessories according to the requirement No Name Appearance Q ty Usage...

Страница 9: ...near air inlet and air outlet 5 Follow the installation distance required in the Fig below to ensure sufficient space for maintenance 6 The installation location should be far from heat sources flamm...

Страница 10: ...Total length of communication line between indoor unit and wired controller L m Wire size mm Material Standard Remarks Light Ordinary polyvinyl chloride sheathed cord 60227 IEC 52 60227 IEC 53 L 250 2...

Страница 11: ...sion of power cord and capacity of air switch Model Power Cord Size Air Switch Capacity A Minimum Sectional Area of Ground Wire mm Minimum Sectional Area of Power Cord mm GMV ND22TD A T GMV ND28TD A T...

Страница 12: ...erence cardboard on the installation position drill 4 holes according to the hole site on the cardboard as shown in Fig 4 1 2 diameter of drilling hole is according to the diameter of expansion bolt a...

Страница 13: ...n Refer to paper pattern of installation for ceiling opening dimension The center of ceiling opening is indicated on the paper pattern Fix the paper pattern to the unit with 4 screws and fix the corne...

Страница 14: ...e condensate drain pipe into rain pipe to prevent rain water from pouring in and cause property loss or personal injury 3 Condensate drain pipe should be connected into special drain system for air co...

Страница 15: ...applied 4 Insert the drainage hose into drain socket tighten the metal clamp securely 5 Warp the sealing pad over drain hose and metal clamp for heat insulation 6 Make sure to perform insulation work...

Страница 16: ...stall hanger bracket at intervals of 1000 1500mm Unit mm Fig 4 3 4 4 3 3 Test of Drainage System 1 Please test drainage system after electric work is finished Inject approximately 1L purified water to...

Страница 17: ...ump will stop automatically after running for 10min 2 During the test please carefully check the drainage joint make sure no any leakage occur 3 It s strongly recommended to do the drain test before c...

Страница 18: ...4 2 Panel Installation 1 Remove the grille from the panel and then open the horizontal louver 2 Aim the screw hole on panel at the corresponding screw hole on main unit 3 Screw up the screws on corres...

Страница 19: ...ns in order to ensure the units reliable running 6 Install circuit breaker for branch circuit according to related regulations and electrical standards 7 All wiring must use pressure terminal or singl...

Страница 20: ...the terminal 2 The connection of stranded wire as shown in Fig 5 1 2 1 Strip about 10mm insulation of the end of stranded wire by stripping and cutting tool 2 Loosen the wiring screws on terminal boa...

Страница 21: ...t the power cord to terminal L N 4 Fix the power cord with wiring clamp 5 3 Connection of Communication Wire between Indoor Unit and Outdoor Unit or Indoor Unit 1 Detach the electric box lid 2 Let the...

Страница 22: ...for Wired Controller 1 Detach the electric box lid 2 Let the communication wire pass through the wiring through holes 3 Connect the communication wire to terminal H1 and H2 of indoor 4 bit wiring boa...

Страница 23: ...that must be set as master one and slave one 4 One wired controller can control 16 indoor units in maximum at the same time As shown in Fig 5 5 NOTES The type of indoor units must be the same if they...

Страница 24: ...Multi Variable Air Conditioners One way Cassette Type Indoor Unit 20 Fig 5 5...

Страница 25: ...of Filter 1 Remove the filters from inlet of 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 un...

Страница 26: ...epair 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 Troubleshoo...

Страница 27: ......

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