Akai MWF-18CRN1-QC1G User manual

After Sales Support
TEL: [phone]
Window or Wall Mounted
Air Conditioner - Cooling only
Instruction manual
Model Number MWF-18CRN1-QC1G
FOR THE INSTALLER
INSTALLATION AND SERVICE

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Contents
2 1. Precaution
3 2. Features and panel
6 3. Unit dimension
7 4. Disassembly instructions
15 5. Installation
21 6. Refrigerant cycle diagram
22 7. Operation limits
23 8. Wiring diagram
27 9. Protection function
29 10. Troubleshooting
38 11. Characteristic of temperature sensor

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1.1 Safety precaution
• To prevent injury to the user or other people and property damage, the
following instructions must be followed.
• Incorrect operation due to ignoring instruction will cause harm or damage.
• Before service unit, be sure to read this service manual at rst.
1.2 Warning
• Do not use damaged power cords, plugs, or a loose socket.
• Always use the power plug and socket with the ground terminal.
• Do not modify or extend the power cord.
• Do not turn the air-conditioner ON or OFF by plugging or unplugging the
power plug.
• Use a dedicated power outlet for this appliance.
• Grasp the plug to remove the cord from the outlet. Do not touch it with
wet hands.
• Do not place a heater or other appliance near the power cable.
• Do not allow water to run into electrical parts.
• Do not store or use ammable gas or combustibles near the air conditioner.
• Unplugging the unit if strange sounds, odours, or smoke comes from it.
1.3 Caution
• Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.
• Do not touch the metal parts of the product when removing the air lter.
They are very sharp.
• Do not step on or put anything on the product.
• Do not insert hands or other objects through the air inlet or outlet while the
air conditioner is plugged in.-
1. Precaution

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2.1 Features
• Powerful cooling.
• Slide-in and slide-out chassis for the simple installation and service.
• Side air-intake, side cooled-air discharge.
• Washable one-touch lter and easy removed panel.
• Super compact design.
• Reliable and ecient rotary compressor is equipped.
• Unique Quiet Design.
• Fresh air switch.
• Anti-freezing control in cooling mode. Prevent the water being freezed on
evaporator by sensing the evaporator pipe temperature in cooling mode.
• Time Delay Safety. Restarting is for approx. 3 minutes.
• Anti-cold function. Prevent the cold wind at the beginning of unit start.
• Auto-restart, When the power supply is interrupted and then restore, the
air conditioners automatically restore the previous function setting.
• Auto mode in heating mode. The mode can be changed by the
room temperature.
• Auto defrosting for cooling products.
• Sleep mode.
• Self-diag. function.
2.2 Control panel illustration
2.2.1 Control panel (cooling only mode)
Capacity < 9000Btu/h
(F Panel)
2. Features and panel

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Capacity ≥ 9000Btu/h
(F Panel)
Capacity < 9000Btu/h (E1 Panel)
Capacity ≥ 9000Btu/h (E1 Panel)

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2.2.3 POWER
• Press the power keypad to turn the unit on/o.(The timer keypad controls
the auto Start/stop feature of the unit.)
2.2.4 Mode
• Press the mode keyboard to select the operating mode.
2.2.5 Temperature up and down
• Press the keyboard to increase the set(operating) temperature of
the units.
• Press the keyboard to increase the set(operating) temperature of
the units.
2.2.6 Fan
• Press the fan keyboard to activate the appropriate fan speed setting.
2.2.7 Swing
• Press the swing keyboard to activate the automatic air swing
(oscillation)feature.
• Press the swing keyboard for 2 seconds (available for mwh(f)-07c(h)
r-qb8) will activate the sleep mode which can reduce noise creating a
comfortable sleeping environment.
2.2.8 TIMER
• Press the timer keyboard to activate the auto start or auto stop
timer function.

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3. Unit dimension
Model A (mm) B (mm) C (mm)
MWF-05CRN1-QC1G
346 450 535
MWF-07CRN1-QC1G
MWF-07HRN1-QC1G
MWF-09CRN1-QC1G
380 600 560
MWF-09HRN1-QC1G
MWF1-12CRN1-QC1G
MWF-12HRN1-QC1G
430 660 687
MWF-16CRN1-QC1G
MWF-16HRN1-QC1G
MWF-18CRN1-QC1G
MWF-18HRN1-QC1G
430 660 770
MWF-21CRN1-QC1G
MWF-21HRN1-QC1G

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4.1 Unplug the power cord and move the unit to open place.
4.2 How to disassemble front panel.
You should unplug the power cord (see 1 step).
First, pull the front panel from bottom side.
Second, open left and right side slots, lift the front panel up at the same time.
4. Disassembly instructions
slot

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4.3 How to remove the lter.
4.3.1 You should unplug the power cord (see 1 step).
4.3.2 You should disassemble the front panel (see 2 step)
Pull the knob to remove the lter.
4.4 How to disassemble front panel.
4.4.1 You should unplug the power cord (see 1 step).
4.4.2 You should disassemble the front panel (see 2 step).
4.4.3 You should remove the lter (see 3 step).
First, remove the two screws as following pictures.
Second, unplug the plug connecting with display PCB.
knob
p
lu
g

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4.5 How to pull the refrigerant system from unit cabinet.
4.5.1 You should unplug the power cord (see 1 step).
4.5.2 You should disassemble the front panel (see 2 step).
4.5.3 You should remove the lter (see 3 step).
4.5.4 You should disassemble the front frame (see 4 step).
First, remove left and right screws (2) and back screws (2) as following pictures.
Second, pull the refrigerant system with grip as following.
g
ri
p

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4.6 How to disassemble the Electrical Box.
4.6.1 You should unplug the power cord (see 1 step).
4.6.2 You should disassemble the front panel (see 2 step).
4.6.3 You should remove the lter (see 3 step).
4.6.4 You should disassemble the front frame (see 4 step).
4.6.5 You should pull the refrigerant system from unit cabinet (see 5step).
First, remove the 2 screws, take o the Electrical Box side cover.
Second, disjoin the vertical louver out of the step motor axis and pull it out.

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Third, snip the tighten strip as following and pull the Electrical Box.
Fourth, remove the Electrical Box’s front plastic cover.
Fifth, remove the screws and open the Electrical Box.
Tighten strip

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4.7 How to disassemble the centrifugal fan (indoor).
4.7.1 You should unplug the power cord (see 1 step).
4.7.2 You should disassemble the front panel (see 2 step).
4.7.3 You should remove the lter (see 3 step).
4.7.4 You should disassemble the front frame (see 4 step).
4.7.5 You should pull the refrigerant system from unit cabinet (see 5 step).
First, remove the four screws and evaporator, disassemble the screw of
centrifugal fan.
Second, remove the 2 screws as following, disassemble the air inlet cover and take
o centrifugal fan.

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4.8 How to disassemble outdoor axial fan (outdoor).
4.8.1 You should unplug the power cord (see 1 step).
4.8.2 You should disassemble the front panel (see 2 step).
4.8.3 You should remove the lter (see 3 step).
4.8.4 You should disassemble the front frame (see 4 step).
4.8.5 You should pull the refrigerant system from unit cabinet (see 5 step).
First, remove the 4 screws as following and remove the reinforce plate.
Second, remove the screws which x the left condenser’s bracket and right
condenser’s bracket with rear boarding.
Third, remove the screws which x the condenser with chassis.

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Fourth, remove the condenser, disassemble the axial fan.
4.9 How to disassemble fan motor.
4.9.1 You should unplug the power cord (see 1 step).
4.9.2 You should disassemble the front panel (see 2 step).
4.9.3 You should remove the lter (see 3 step).
4.9.4 You should disassemble the front frame (see 4 step).
4.9.5 You should pull the refrigerant system from cabinet (see 5 step).
4.9.6 You should disassemble the Electrical Box (see 6 step).
4.9.7 You should disassemble the indoor centrifugal fan (see 7 step).
4.9.8 You should disassemble the outdoor axial fan (see 8 step).
Remove 4 screws which x fan motor with it’s holder, then disassemble the fan motor.

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5.1 Select the best location
1. To avoid vibration and noise, make sure the unit is installed securely and rmly.
2. Install the unit where the sunlight does not shine directly on the unit. If the unit
receives direct sunlight, build an awning to shade the cabinet.
3. There should be no obstacle, such as a fence or wall, within 50cm from the back
of the ambient because it will prevent heat radiation of the condenser.
4. Restriction of outside air will greatly reduce the cooling and heating eciency of
the air conditioner.
5. Install the unit on a slight angle so that an condensate formed will not enter the
room (about 10mm or 1/4 bubble with level).
6. Install the unit with its bottom portion 75~150cm above the oor level.
7. The power cord must be connected to an independent circuit. The yellow/green
wire must be grounded.
CAUTION
All side louvres of the cabinet must remain exposed to the outside of the structure.
5. Installation

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5.2 Check o installation
• The setting conditions must be checked prior to initial starting. The under
mentioned items are especially important checking points when the
installation is nished.
• Grounding wire (yellow/Green) is provided in the power cord. The wire must
be grounded.
• Ensure that the unit is connected to a suitably rated and dedicated circuit.
• To avoid vibration or noise, make sure the air conditioner is installed securely.
• Avoid placing furniture of draperies in front of the air inlet and outlet.
5.3 How to drain
The base pan may overow due to high humidity. To drain the excess water, remove
the drain cap from the bottom of the unit (if tted) and attach a drain hose
(not supplied).
1. Take the drain pan which is packed with the unit.
2. Remove the rubber plug from the bottom of the base pan (if tted).
3. Install the drain pan over the area of the cabinet where you removed the plug,
and secure with 2 screws provided.
4. Connect the drain hose to the outlet located at the bottom of the drain pan.
You can purchase the drain hose or tubing locally to satisfy our particular needs
(Drain hose is not supplied).

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5.4 How to install
5.4.1 Installation of the housing
Step1
Remove the air conditioner from it's packaging, remove xing screws and slide the
air conditioner out of it's housing (Refer to Installation Steps)
Step2
Prepare the hole in the wall so that the bottom of the housing is well supported,
the top has minimum clearance and the air inlet louvers have clearance as shown
below in options A and B. Holes from the outside through to the cavity should be
sealed. The housing should slope down towards the rear b about 5mm to allow
water formed during operation to drain.
Step3
Install the housing into the wall and secure. Ensure the foam seals are not damaged.
Flash, seal or ll gaps around the inside and outside to provide satisfactory
appearance and protection against the weather, insects and rodents.

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5.4.2 Installation of the unit into the housing
• Slide the unit into the housing until it is rmly against the rear of the housing.
Care is required to ensure the foam sealing strips on the housing remain
in position.
• Connect the air conditioner to the power and position excess cord length
beneath the air conditioner base.
• Engage the chassis xing brackets into the bottom housing rail and secure to
the base with the screw provided.
• Remove the front panel from it's carton and plastic bag and t as per the
installation instruction.
• Switch unit on. Check for operation of the unit and check for vibration in
the installation.
• Fit the drain pan to the housing and run a drain line to a suitable location
if required.
5.4.3 Installation of the unit into the wall

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5.4.2 Installation of the unit into the housing
Step 1. Remove the front panel and the air lter.
Hold the slot under the front panel, then uplift it outwards, and remove the front
panel (See Fig.1). Pinch the handle under the air lter and make the air lter arched,
remove it from the slot from underside to upside (See Fig.2).
Step 2. Remove the frame.
Remove the two xing screws from the frame (See Fig.3).
Grasp the left corner of the frame's underside, then loosen the frame (See Fig.4).
Step 3. Installation.
For <9000Btu/h models, remove the two xing screws on the chassis xing
brackets, then remove the chassis xing bracket;
For 9000Btu/h modes, remove the front two screws only.
Then remove the four screws located on both sides and back sides of the cabinet.
(See Fig.5).
Grasp the handle on the chassis and carefully slide the air conditioner out of the
cabinet (See Fig.6).
Remove shipping pad from around compressor before operation and make sure the
discharge points to the drain pan are aligned before the chassis is pushed into the
cabinet (See Fig.7).
Push the unit chassis into the cabinet (See Fig.8).
Install the two chassis xing brackets using the two xing screws (See Fig.5).