Table of Contents
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Air conditioning
Installation and User Manual
Cassette - Multi-Split
Thank you for choosing our product. For proper operation, please read this manual carefully and keep this
manual. If you lose the user manual, contact the installer, or visit www.nipon-coolair.com, or send an e-mail
to geral@nipon-coolair.com to obtain the digital version.
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Table of Contents
Summary of Contents for Nipon Coolair MB18 GA
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Page 1: Air Conditioning
Air conditioning Installation and User Manual Cassette - Multi-Split Thank you for choosing our product. For proper operation, please read this manual carefully and keep this manual. If you lose the user manual, contact the installer, or visit www.nipon-coolair.com, or send an e-mail to geral@nipon-coolair.com to obtain the digital version. - Page 2 Cassete - Multi-Split Models: MB12 GA MB18 GA MB24 GA This marking indicates that this product should not be disposed with other household wastes throughout the EU. To prevent possible harm to the environment or human health from un- controlled waste disposal, recycle it responsibly to promote the sustainable reuse of mate- rial resources.
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Page 3: Table Of Contents
Cassete - Multi-Split Contents 1 Safety Precautions ..................1 2 Outline of the Unit and Main Parts..............3 3 Operation of remote controller................. 4 3.1 Buttons on remote controller ..............4 3.2 Introduction for icons on display screen............. 4 3.3 Introduction for buttons on remote controller..........5 3.4 Function introduction for combination buttons.......... - Page 4 Cassete - Multi-Split Please read this operating manual carefully before operating the unit. to the material objects for reference. The Refrigerant To realize the function of the air conditioner unit, a special refrigerant circulates leads to explosion . It can Compared to common refrigerants, R32 is a nonpolluting refrigerant with no lower.
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Page 5: Safety Precautions
Cassete - Multi-Split 1 Safety Precautions This mark indicates procedures which, if improperly performed, might lead to the WARNING! death or serious injury of the user. This mark indicates procedures which, if improperly performed, might possibly result CAUTION! in personal harm to the user, or damage to property. WARNING! (1). - Page 6 Cassete - Multi-Split (14). During installation, attach the refrigerant piping securely before running the compressor. If the compressor is not attached and the stop valve is open during pump-down, air will be sucked in when the compressor is run, causing abnormal pressure in the freezer cycle which will lead to breakage and even injury.
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Page 7: Outline Of The Unit And Main Parts
Cassete - Multi-Split 2 Outline of the Unit and Main Parts Indoor 1. Drainage device 2. Drainage pipe Outdoor 4. Connection pipe Air inlet 5. Wired Controller 6. Wireless Controller 7. Big handle 8. Liquid Pipe 9. Gas pipe 10. Drainage pipe Air outlet 11. -
Page 8: Operation Of Remote Controller
Cassete - Multi-Split 3 Operation of remote controller 3.1 Buttons on remote controller ON/OFF button MODE button +/- button FAN button I FEEL button button button button CLOCK button TIMER ON/TIMER OFF button X-FAN button Note: X-FAN is the same with BLOW TEMP button TURBO button SLEEP button... - Page 9 Cassete - Multi-Split Note: Note:...
- Page 10 Cassete - Multi-Split +/- button ture 1 Holding "+" or "-" button, 2s later, set temperature on remote controller will tor on indoor unit will change accordingly. (Temperature can’t be adjusted under auto mode) TIMER ON, TIMER OFF or CLOCK, press "+" or "-" button to adjust time.
- Page 11 Cassete - Multi-Split button Press this button can select up&down swing angle. Fan blow angle can be selected circularly as below: no display (horizontal louvers stops at current position) . Horizontal louver will automatically swing up & down at maximum angle. required angle, release the button.
- Page 12 Cassete - Multi-Split started up, press "TIMER ON" button to cancel it. TIMER OFF button "TIMER OFF" button can set the time for timer off. After pressing this button," " icon disappears and the word "OFF" on remote controller blinks. Press "+" or "-" button to adjust TIMER OFF setting.
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Page 13: Function Introduction For Combination Buttons
Cassete - Multi-Split r, temperature indicator on indoor unit displays outdoor ambient temperature. Note: Outdoor temperature display is not available for some models. At that time, indoor unit receives " "signal, while it displays indoor set temperature. ’s defaulted to display set temperature when turning on the unit.There is no display in the remote controller. -
Page 14: Operation Guide
Cassete - Multi-Split 3.5 Operation guide After putting through the power, press "ON/OFF" button on remote controller to turn on the air conditioner. Press "MODE" button to select your required mode: AUTO, COOL, DRY, FAN, HEAT. Press "+" or "-" button to set your required temperature. (Temperature can’t be adjusted under auto mode). -
Page 15: Preparative For Installation
Cassete - Multi-Split Preparative for Installation .1 Standard Accessory Parts The standard accessory parts listed below are furnished and should be used as required. Table 1 Indoor Unit Accessories Name Appearance Q'ty Usage To connect with the hard PVC drain Drain Hose pipe Nut with Washer... -
Page 16: Connection Pipe Requirement
Table 2 Models H(mm) MB12 GA MB18 GA MB24 GA Fig.2 .3 Connection Pipe Requirement CAUTION! The maximum length of the connection pipe is listed in the table below. Do not place the units between... -
Page 17: Electrical Requirement
Liquid Outdoor Unit (m) thickness) (mm) MB12 GA MB18 GA MB24 GA The connection pipe should be insulated with proper water-proof insulating material. The pipe wall thickness shall be 0.5-1.0mm and the pipe wall shall be able to withstand the pressure of 6.0 MPa. -
Page 18: Installation Of The Unit
Cassete - Multi-Split Installation of the Unit .1 Installation of the Indoor Unit .1.1 Indoor unit dimension For the units: 12-18k For the units: 24k Fig. Table Item Model MB 12 GA MB 18 GA MB 24 GA... - Page 19 Cassete - Multi-Split .1.2 Installing the Main Body Unit Fig. (1). Install the hoisting stand on the hoisting screw by using nuts and gaskets at both the upper and lower sides of the hoisting stand. To prevent the gasket from breaking off, a gasket anchor board can be helpful.
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Page 20: Installation Of The Connection Pipe
Cassete - Multi-Split .1.4 Leveling The water level test must be done after installing the indoor unit to make the unit is horizontal, as shown below. Horizontal tester Fig.8 .2 Installation of the Connection Pipe .2.1 Flare Processing (1). Cut the connection pipe with the pipe cutter and remove the burrs. (2). - Page 21 Cassete - Multi-Split .2.2 Bending Pipes (1). The pipes are shaped by your hands. Be careful not to collapse them. Fig.10 (2). Do not bend the pipes in an angle more than 90°. Pipe Heat insulating (3). When pipes are repeatedly bent or stretched, the material pipe will Cutter...
- Page 22 Cassete - Multi-Split hand tight and then tighten it with the spanner. Refer to Table to check if the wrench has been tightened properly (too tight would mangle the nut and lead to leakage). Examine the connection pipe to see if it leaks, then take the treatment of heat insulation, as shown in the Fig.12.
- Page 23 Cassete - Multi-Split .2.4 Connecting the Pipe at the Outdoor Side Unit connector. The tightening method is the same as that as at the indoor side. .2.5 Checking the Pipe Connections for Gas Leaking For both indoor and outdoor unit side, check the joints for gas leaking by the use of a gas leakage detector without fail when the pipes Fig.13...
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Page 24: Vacuum And Gas Leakage Inspection
Cassete - Multi-Split If the outdoor unit is installed higher than the indoor unit (See Fig.16) (1). Taping should be done from lower to the upper part. (2). All pipes are bound and taped together and also should be trapped to prevent water from returning to the room. - Page 25 Cassete - Multi-Split (7). Slightly open the liquid valve and let some refrigerant go to the connection pipe to balance the pressure inside and outside of the connection pipe, so that air will not come into the connection pipe when removing the hose. Note that the gas and liquid valve can be opened fully only after the manifold valve assembly is removed.
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Page 26: Installation Of The Drain Hose
PVC or other related glue in heat insulation sponge. the joints of two ends of drain pipe. Metal clamp (accessory) Metal clamp Insulation sponge (accessory) Drain hose (accessory) Grey tape (accessory) Indoor Unit MB12 GA 10±2mm(2/5±2/25inch) MB18 GA MB24 GA 15±3mm(3/5±1/10inch) - Page 27 Cassete - Multi-Split (3). When unifying multiple drain pipes, install the pipes as Fig.20. Select converging drain pipes whose gauge is suitable for the operating capacity of the unit.(take the cassette type unit for example) T-joint converging drain pipes T-joint converging drain pipes Fig.20 (4).
- Page 28 Cassete - Multi-Split 3-way connection Connection of drain elbow of drainage pipe joint Connection of horizontal pipe Fig.24 Fig.25 Fig.26 5.4.3 Precautions When Doing Riser Piping Work (1). Make sure that heat insulation work is executed on the following 2 spots to prevent any possible water leakage due to dew condensation.
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Page 29: The Panel Installation
Cassete - Multi-Split .4.4 Testing of Drain Piping Shown in the Fig. , Add approximately 1liter of water slowly into the drain pan and check Drain hose Test hole cover Drain vent for repair use (plastic stopper is included) (drain the water in waterspoit by this outlet vent) Test hole <Immiting water from the rest hole>... - Page 30 Cassete - Multi-Split (3). If gap still exists between ceiling and decoration panel after tightening the screws, readjust the height of the indoor unit. (Fig.3 ) Fig.3 (4). Fig.3 Fig.3 .5.2 Installing the Panel (1). (2). Latch other two hooks. (3).
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Page 31: Electrical Wiring
Cassete - Multi-Split Fig.3 5.6 Electrical Wiring 5.6.1 Wiring Precautions WARNING! . Before obtaining access to terminals, all supply circuits must be disconnected. . The rated voltage of the unit is as shown as Table 4 . Before turning on, verify that the voltage is within the 198~264V range(for single phrase unit) or 342~457V range (for three-phrase unit). - Page 32 Cassete - Multi-Split CAUTION! . The power source capacity must be the sum of the air conditioner current and the current of other capacity. raise the voltage. 5.6.2 Electrical Wiring (1). For solid core wiring (Fig.3 ) i l p mm (15/16") .
- Page 33 Cassete - Multi-Split After passing the connection cord fasten it with the cord clamp.(Fig.3 ) WARNING! . Before starting work, check that power is not being supplied to the indoor unit and outdoor unit. . Match the terminal block numbers and connection cord colors with those of the indoor unit side. .
- Page 34 Cassete - Multi-Split (5). Electric wiring of indoor unit side Remove the electric box cover from the electric box sub-assy and then connect the wire. Power supply terminal board Seal here to avoid leakage Fig.3...
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Page 35: Installation Of Controllers
Cassete - Multi-Split CAUTION! Tighten the power cord respectively on the terminal boards with If the power supply are wired incorrectly, the air conditioner may be damaged. Connect the indoor unit connection cord properly based on the corresponding marks as shown in Fig.3 . - Page 36 Cassete - Multi-Split Table 8 Number Error code Error Compressor high pressure protection Indoor anti-freeze protection Compressor low pressure protection, refrigerant lack protection and refrigerant colleting mode Compressor high discharge temperature protection AC over-current protection Communication error Mode conflict Anti-high temperature protection Full water protection Indoor ambient temperature sensor is open/short circuited Indoor evaporator temperature sensor is open/short circuited...
- Page 37 Cassete - Multi-Split (2). Instructions to the Error Indicating Lamps on the Panel of the Cassette Type Unit. Receiver "88" Dispaly "Auto" Button Power Timer "Test" Button Indicating Lamp Indicating Lamp Fig.40 Power and ON/OFF Indicating Lamp: It goes red when the unit is powered on while it goes white when the unit is started. Timer Indicating Lamp: Timer indicator on indoor unit will be on when timer ON is set under off status and timer OFF is set under on status.
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Page 38: Troubleshooting And Maintenance
Cassete - Multi-Split 8 Troubleshooting and Maintenance 8.1 Troubleshooting following points before repair: Table 10 Failure Possible Reasons The power supply is not connected. Electrical leakage of air-conditioning unit causes tripping of the leakage The unit cannot be started. switch. The operating keys are locked. -
Page 39: Routine Maintenance
Cassete - Multi-Split .2 Routine Maintenance Before accessing to terminal devices, all power supply circuits must be disconnected. Notes: the unit. Do not clean the unit with gasolene, benzene, thinner, polishing powder or liquid insecticide, otherwise it would cause discoloration and deformation of the unit. Increase the frequency of cleaning if the unit is installed in a room where the air is extremely 1. - Page 40 Cassete - Multi-Split 2. Disassemble the air inlet grille Open the air inlet grille at 45°, raise it and remove the grille. Filter screen Filtering element Support Bolt up, wash it by warm water meld with the Note: Never use hot water over 45°C in case of color fading or turning yellow.
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Page 41: Safety Operation Of Flammable Refrigerant
Cassete - Multi-Split Safety operation of flammable refrigerant Qualification requirement for installation and maintenance man All the work men who are engaging in the refrigeration system should bear the valid certification awarded by the authoritative organization and the qualification for dealing with the refrigeration system recognized by this industry. If it needs other technician to maintain and repair the appliance, they should be supervised by the person who bears the qualification for using the flammable refrigerant. - Page 42 Cassete - Multi-Split 9 Safety operation of flammable refrigerant a. Shut down the unit and cut power supply b. Eliminate the refrigerant c. Vacuuming d. Clean it with N2 gas e. Cutting or welding f. Carry back to the service spot for welding The refrigerant should be recycled into the specialized storage tank.