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Read this manual carefully before using this air-conditioner. If you still have any 
difficulties or problems, consult your dealer for help. 
The air-conditioner is designed to provide you with comfortable room conditions. Use 
this unit only for its intended purpose as described in this instruction manual.

We recommend that this air-conditioner is installed properly by qualified installation technicians in 

 

accordance

with the installation instructions provided with the unit. 
Before installation, check if the voltage of the power supply at installation site is the same as the voltage 
shown on the nameplate. 

You must not carry on any transformation to this product, otherwise, it may possibly 
cause such consequences as water leakage, breakdown, short-circuit, electric 
shock, fire, etc.
The work such as piping welding, etc. should be carried out far away from flammable 
explosive material vessels, including the air-conditioner refrigerant, to guarantee the 
security of the site.
To protect the air-conditioner from heavy corrosion, avoid installing the outdoor unit 
where salty seawater can splash directly onto it or in sulphurous air near a spa. Do 
not install the air-conditioner where excessively high heat-generating objects are 
placed. 

Never use gasoline or other inflammable gas near the air-conditioner, which is very 
dangerous. 
When the air conditioner operation is abnormal, such as burnt smell, deformation, 
fire,smoke, etc., it is forbidden to continue using the air conditioner, the main power 
switch the of air conditioner must be cut off immediately and the agent must be 
contacted.

If the supply cord is damaged, it must be replaced by the factory or its service 
department in case of danger.
The place where this product is installed must have the reliable electrical earth facility 
and protections. Please do not connect the grounding of this product to various kinds of 
air-feeding ducts, drain piping, lightning protection facility as well as other piping lines to 
avoid receiving an electric shock and damages caused by other factors. 
Wiring must be done by a qualified electrician. All the wiring must comply with the local 
electrical codes. 
Consider the capacity of the electric current of your electrical meter and socket before 
installation. 
The power wire where this product is installed is supposed to have the independent 
leakage protective device and the electric current over-load protection device which are 
provided for this product.
The appliance is not to be used by persons who lack of experience and knowledge, 
unless they have been given supervision or instruction. Children should be supervised 
not to play with the appliance.
Means for disconnection, which can provide full disconnection in all poles, must be  
incorporated in the fixed wiring in accordance with the wiring rules.

Do not turn the air-conditioner on and off from the power main switch. Use the

ON/OFF operation button.

Do not stick anything into the air inlet and air outlet of both the indoor and outdoor 

units. This is dangerous because the fan is rotating at a high speed. 

 

 

Caution Statements

2

DANGER

WARNING

 

WARNING

CAUTION

Summary of Contents for YFKN18BZNREUH1

Page 1: ...er R 410A 50Hz Heat Pump R 410A 50Hz Cooling Only Model YFKN42BZMREUH1 YFKN48BZMREUH1 YFKN55BZMREUH1 YFKN18BZNREUH1 YFKN24BZNREUH1 YFKN36BZNREUH1 Model YFJN18BZNRETH1 YFJN24BZNRETH1 YFJN36BZNRETH1 YFJ...

Page 2: ...erant Piping 14 4 1 The Piping Material 14 4 2 Piping Connection 14 5 Drain Piping 15 6 Electrical wiring 16 7 Attaching the Air Return Grille 16 8 The Installation of the Outdoor Unit 17 8 1 Installa...

Page 3: ...damage It refers to the remarks and instruction to the operation maintenance and service DANGER WARNING Alert Symbols CAUTION 1 Contents NOTE This air conditioner has been designed for the following t...

Page 4: ...ing the air conditioner the main power switch the of air conditioner must be cut off immediately and the agent must be contacted If the supply cord is damaged it must be replaced by the factory or its...

Page 5: ...Intake Inside of Horizontal Louver 3 Composition of the Air conditioner Indoor Unit Outdoor Unit Notes Figures in the manual are only simple representation of the appliance it may not comply with the...

Page 6: ...cy switch It lights on during operation It lights off all when setting SLEEP mode Run indicator Red Wired remote controller Wireless remote controller Wire remote controller optional You can control t...

Page 7: ...rned off by user The fan of the indoor unit will never stop running in cooling operation It remains running even if the compressor stops working Heating capacity depends on external factors as outdoor...

Page 8: ...bs 4 then remove the holding screws 4 or 6 as indicated by the arrow marks Step2 Open the air return grille to an angle of more than 45 and take out the air filter from the air inlet grille by holding...

Page 9: ...4 way valve Heat exchanger Liquid piping Heating cycle Cooling cycle INDOOR UNIT OUTDOOR UNIT Heat exchanger EEV Service valve Outdoor unit Indoor unit Terminal Terminal SI L N SI L N Power connecting...

Page 10: ...es other than the specified refrigerant R410A such as air Any presence of air or other foreign substance in the refrigerant circuit causes an abnormal pressure rise or rupture resulting in injury If a...

Page 11: ...8 9 10 11 12 13 14 Tool Knife or wire stripper Tube expander Inner hexagon spanner Tape measure Gradienter Hammer Churn drill 3 1 Before installation Unit type Power supply specification When moving t...

Page 12: ...anging And Adjustment For Pipe Cover Fixing For Refrigerant Piping Connection For Drain Pipe Connection For Joint Socket Connection For Drain Hose Connection For Drain Hose Cover 1 1 1 1 2 2 1 10 8 1...

Page 13: ...rain properly The ceiling is strong enough to bear the weight of the indoor unit Sufficient clearance for maintenance and servicing Piping between the indoor and outdoor units is within the allowable...

Page 14: ...let Right outlet Rear outlet Drain outlet rear right Drain outlet rear left Drain outlet right Drain outlet left Fig 3 3 3 Fig 3 3 4 Fig 3 3 5 Slide stoppers 4 places of the catches then remove the sc...

Page 15: ...nclosed paper pattern as a reference and drill the holes for the suspension bolts and pipe Note Decide the locations based on the direct measurements ii After the locations are properly placed the pap...

Page 16: ...panners Fig 4 3 Screw up the nut torque 3 After finishing connecting the refrigerant pipes keep it warm with the insulation material 6 35mm 9 52mm 12 7mm 15 88mm 19 05mm Tube size 20 40 60 80 100 Torq...

Page 17: ...ld be insulated because condensation may form there causing water to leak Drain piping passing indoors Drain sockets Referring the figure below insulate the drain socket and drain hose using the inclu...

Page 18: ...n grille When clamping the wiring use the included clamping material as shown in the FIG 6 1 to prevent outside pressure being exerted on the wiring connections and clamp firmly When doing the wiring...

Page 19: ...d onto the wall make sure that the wall and the supporting rack is strong enough to hold the weight of the appliance Release the setscrews of the electric cover remove the electric cover If the valve...

Page 20: ...eat insulation effect Also be sure the condensed drain hose splits away from bundle and drips clear of the unit and the piping The two refrigerant tubes and electrical wire if local codes permit shoul...

Page 21: ...cal technical service center of our company for further information Narrow pipe Hex wrench Wide pipe Service valve Bonnet of service valve Bonnet of narrow valve Bonnet of wide valve Indoor unit Outdo...

Page 22: ...ng flexible cord make sure to use the round crimp style terminal for connection to the power supply terminal block Place the round crimp style terminals on the wires up to the covered part and secure...

Page 23: ...nt possible harm to the environment or human health from uncontrolled waste disposal recycle it responsibly to promote the sustainable reuse of material resources To return your used device please use...

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