MUND CLIMA MUPO-07-C4 User manual

CL20080
MUPO-07-C4 COOL ONLY
Service manual
English

CONTENTS
 1. Precaution............................................................................................................................................. 1
 1.1 Safety Precaution............................................................................................................................... 1
 1.2 Warning............................................................................................................................................... 1
 2. Function and control panel................................................................................................................. 4
 2.1 Function.............................................................................................................................................. 4
 2.2 Control panel...................................................................................................................................... 5
 3. Dimension............................................................................................................................................. 7
 4 Refrigerant Cycle Diagram................................................................................................................... 8
 5 Wiring Diagram...................................................................................................................................... 9
 6 Electronic function.............................................................................................................................. 10
 6.1 Terms and definitions...................................................................................................................... 10
 6.2 Electric Control working environment........................................................................................... 10
 6.3 Protection function.......................................................................................................................... 10
 6.4 Fan-only mode function requirement ............................................................................................ 10
 6.5 Cooling mode function requirement.............................................................................................. 10
 6.6 Drying mode ......................................................................................................................................11
 6.7 Sensor malfunction.......................................................................................................................... 12
 6.8 Some standard functions synopsis ............................................................................................... 12
 7 Installation details............................................................................................................................... 13
 7.1 Installation instructions................................................................................................................... 13
 7.2 Care and maintenance..................................................................................................................... 21
 8 Basic test procedure........................................................................................................................... 22
 8.1 Defective compressor ..................................................................................................................... 22
 8.2 Sealed refrigeration system repairs............................................................................................... 25
 8.3 Fan motor.......................................................................................................................................... 27
 8.4 Capacitor........................................................................................................................................... 28
 9 Characteristic of temperature sensor............................................................................................... 29
 10 Troubleshooting................................................................................................................................ 30

1
1. Precaution
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 first.
1.2 Warning
Installation
Do not use a defective or underrated circuit breaker. Use this appliance on a dedicated circuit.
There is risk of fire or electric shock.
For electrical work, contact the dealer, seller, a qualified electrician, or an Authorized service
center.
Do not disassemble or repair the product, there is risk of fire or electric shock.
Always ground the product.
There is risk of fire or electric shock.
Install the panel and the cover of control box securely.
There is risk of fire of electric shock.
Always install a dedicated circuit and breaker.
Improper wiring or installation may cause fore or electric shock.
Use the correctly rated breaker of fuse.
There is risk of fire or electric shock.
Do not modify or extend the power cable.
There is risk of fire or electric shock.
Do not install, remove, or reinstall the unit by yourself (customer).
There is risk of fire, electric shock, explosion, or injury.
Be caution when unpacking and installing the product.
Sharp edges could cause injury, be especially careful of the case edges and the fins on the
condenser and evaporator.
For installation, always contact the dealer or an Authorized service center.
There is risk of fire, electric shock, explosion, or injury.
Do not install the product on a defective installation stand.

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It may cause injury, accident, or damage to the product.
Be sure the installation area does not deteriorate with age.
If the base collapses, the air conditioner could fall with it, causing property damage, product
failure,
and personal injury.
Do not let the air conditioner run for a long time when the humidity is very high and a door or a
window is left open.
Moisture may condense and wet or damage furniture.
Take care to ensure that power cable could not be pulled out or damaged during operation.
There is risk of fire or electric shock.
Do not place anything on the power cable.
There is risk of fire or electric shock.
Do not plug or unplug the power supply plug during operation.
There is risk of fire or electric shock.
Do not touch (operation) the product with wet hands.
There is risk of fire or electric shock.
Do not place a heater or other appliance near the power cable.
There is risk of fire and electric shock.
Do not allow water to run into electric parts.
It may cause fire, failure of the product, or electric shock.
Do not store or use flammable gas or combustible near the product.
There is risk of fire or failure of product.
Do not use the product in a tightly closed space for a long time.
Oxygen deficiency could occur.
When flammable gas leaks, turn off the gas and open a window for ventilation before turn the
product on.
Do not use the telephone or turn switches on or off. There is risk of explosion or fire.
If strange sounds, or small or smoke comes from product. Turn the breaker off or disconnect
the power supply cable.
There is risk of electric shock or fire.
Stop operation and close the window in storm or hurricane. If possible, remove the product
from the window before the hurricane arrives.
There is risk of property damage, failure of product, or electric shock.
Do not open the inlet grill of the product during operation. (Do not touch the electrostatic filter,

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if the unit is so equipped.)
There is risk of physical injury, electric shock, or product failure.
When the product is soaked (flooded or submerged), contact an Authorized service center.
There is risk of fire or electric shock.
Be caution that water could not enter the product.
There is risk of fire, electric shock, or product damage.
Ventilate the product from time to time when operating it together with a stove, etc.
There is risk of fire or electric shock.
Turn the main power off when cleaning or maintaining the product.
There is risk of electric shock.
When the product is not be used for a long time, disconnect the power supply plug or turn off
the breaker.
There is risk of product damage or failure, or unintended operation.
Caution
Always check for gas (refrigerant) leakage after installation or repair of product.
Low refrigerant levels may cause failure of product.
Install the drain hose to ensure that water is drained away properly.
A bad connection may cause water leakage.
Keep level even when installing the product.
To avoid vibration of water leakage
Do not install the product where the noise or hot air from the outdoor unit could damage the
neighborhoods.
It may cause a problem for your neighbors.
Use two or more people to lift and transport the product.
Avoid personal injury.
Do not install the product where it will be exposed to sea wind (salt spray) directly.
It may cause corrosion on the product. Corrosion, particularly on the condenser and
evaporator fins,
could cause product malfunction or inefficient operation.
Operational
Do not expose the skin directly to cool air for long periods of time. (Do not sit in the draft).
This could harm to your health.

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Do not use the product for special purposes, such as preserving foods, works of art, etc. It is
a consumer air conditioner, not a precision refrigerant system
There is risk of damage or loss of property.
Do not block the inlet or outlet of air flow.
It may cause product failure.
Use a soft cloth to clean. Do not use harsh detergents, solvents, etc.
There is risk of fire, electric shock, or damage to the plastic parts of the product.
Do not touch the metal parts of the product when removing the air filter. They are very sharp.
There is risk of personal injury.
Always insert the filter securely. Clean the filter every two weeks or more often if necessary.
A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction
or damage.
Do not insert hands or other object through air inlet or outlet while the product is operated.
There are sharp and moving parts that could cause personal injury.
Do not drink the water drained from the product.
It is not sanitary could cause serious health issues.
Use a firm stool or ladder when cleaning or maintaining the product.
Be careful and avoid personal injury.
Replace the all batteries in the remote control with new ones of the same type. Do not mix old
and new batteries or different types of batteries.
There is risk of fire or explosion.
Do not recharge or disassemble the batteries. Do not dispose of batteries in a fire.
They may burn of explode.
If the liquid from the batteries gets onto your skin or clothes, wash it well with clean water. Do
not use the remote of the batteries have leaked.
The chemical in batteries could cause burns or other health hazards.
2. Function and control panel
2.1 Function
※Operation mode: Cooling, Dry Fan-only and Auto.
※Auto swing function
※Timer function
※No bucket design.

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※LED display(remote controller)
※Sleep mode
※Air flow direction adjustment
※Wait 3 minutes before resuming operation
※Auto-restart(on some models)
※Self-diagnosis and auto-protection function.
※Anti-freezing control in cooling or drying mode
※Time delay safety, restarting is for approx. 3 minutes on cooling
2.2 Control panel
① Mode select button
Selects the appropriate operating mode. Each time you press the button, a mode
is selected in a sequence that goes from AUTO, COOL, DRY, FAN and HEAT(cooling
only models without) .The mode indicator light illuminates under the different mode
setting
② Sleep button
Used to initiate the SLEEP operation
③ Temperature/Time up / down buttons

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Used to adjust (increasing/decreasing) temperature settings (1℃/2℉increments) in a range of
17℃(62℉) to 30℃(88℉) or the TIMER setting in a range of 0~24hrs.
④ ON-OFF button
Power switch on/off
⑤ Timer button
Used to initiate the AUTO ON start time and AUTO OFF stop time program, in conjuction with
the ︿& ﹀buttons.
⑥ Fan button
Press to select the fan speed in two steps-LOW and HIGH. The fan speed indicator light
illuminates under different fan settings.
⑦ LED display
Shows the set temperature in " ℃" or " ℉" and the Auto-timer settings. While on DRY and
FAN modes, it shows the room temperature
Error codes:
E1- Room temperature sensor error-Unplug the unit and plug it back in. If error repeats, call
for service.
E2- Evaporator temperature sensor error- Unplug the unit and plug it back in.
If error repeats, call for service.
E4- Display panel communication error-Unplug the unit and plug it back in.
If error repeats, call for service.
Protection codes:
P1- Bottom tray is full - Connect the drain hose and drain the collected water away. If error
repeats, call for service
⑧Power management feature(for power management models)
When the ambient temperature is lower (Cooling mode) or higher (Heating mode) than the
setting temperature for a period of time, the unit will be automatically operate power
management feature. The compressor and fan motor stop and the power management
indicator light illuminates. When the ambient temperature is higher (Cooling mode) or lower
(Heating mode) than the setting temperature, the unit will be automatically quit the power
management feature. The power management indicator light turns dark and the compressor
and (or) fan motor run.

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NOTE: When more than one codes occur, the priority of the code display order is:
E4--E2--E1--P1
3. Dimension
Dimension Mode W(mm) D(mm) H(mm)
7k 349 381 749

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4 Refrigerant Cycle Diagram
The figure below is a brief description of the important components and their function in what is called
the refrigeration system.
This will help to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle.
LIQUIDSIDE
GAS SIDE
EVAPORATOR CONDENSER
COMPRESSOR
CAPILIARY TUBE

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5 Wiring Diagram
7k
202025590111
Display board
CN1
M M
CN4
SW1
CN10 P1
RED
BLUE
BROWN
MAIN BOARD
BLACK
RED
MOTOR
BLACK
COMP
3
4
RY1
BLUE
BLACK(OR BROWN)
GREEN(OR Y/G)
WHITE(OR BLUE) POWER
AMBIENT SENSOR
CN3
CN6
EVAPORATOR SENSOR
UP
Y/G
Y/G
N
CAP
BLUE
BLACK
BLUE
M
COMP
RED
Y/G
SU
EL
T1 P01 P02
P03 P04

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6 Electronic function
6.1 Terms and definitions
TC: Temperature of evaporator (T2).
TA: Temperature of indoor ambient (T1).
TS: The set temperature.
TE: Temperature of condenser (T3)
6.2 Electric Control working environment
Input voltage: 187~264V for 50Hz models and 97~127V for 60Hz models;
6.3 Protection function
6.3.1 The compressor functions protection with a delay of three minutes.
6.3.2 Sensor protection at open or short circuit.
6.3.3 Evaporator anti-icing protection at cooling mode.
6.4 Fan-only mode function requirement
6.4.1. The compressor is OFF at Fan-only mode.
(The indoor fan operates together with the outdoor fan for only one fan motor in the unit)
6.4.2. The speed of fan can be optionally chosen as High/Mid/Low.
6.4.3. The TIMER function is valid at the fan-only mode.
6.5 Cooling mode function requirement
6.5.1. The speed of fan can be optionally selected as High/Mid/Low.
6.5.2. The compressor operates as below.

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(TA-Ts)℃
+1
0
Compressor on
Operation conditon
Compressor off
6.5.2.1 If TA﹥TS+1℃, the two fans operate. After 15 seconds, the compressor operates.
6.5.2.2 If TA≤TS after the compressor operates, this compressor will stop, and two fans last for
working all the time.
6.5.3. The speed of fan can be optionally chosen as High/Mid/Low on cooling mode.
6.5.4. Power management (for some models with power management)
Entering into the only-cooling mode, indoor fan motor operates immediately and keeps moving
for 30 minutes at lease. Compressor operates, and indoor fan motor keeps moving; Compressor
stops operation, indoor fan motor shuts off after a delay of 30 minutes.
6.5.5. The TIMER function is valid on the cooling mode.
6.6 Drying mode
6.6.1. When the unit starts to operate at drying mode, the compressor will start while the room
temperature is over 13℃. After the compressor started, the compressor will operate as below.
TA ℃
15
13
Compressor on
Operation conditon
Compressor off
6.6.1.1 When TA<13℃, the compressor stops. And the two fans operate at low speed at all time.
6.6.1.2 When TA≥15℃, the two fans operate, and the compressor will restart to operate after 15seconds
at least.

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6.6.2. The two fans will operate at low speed and the speeds can′t be controlled.
The outdoor fan will operate with compressor.
6.6.3 Power management (for some models with power management)
Entering into drying mode, indoor fan motor operates immediately and keeps moving for 30 minutes
at lease. Compressor operates, and indoor fan motor keeps moving; Compressor stops operation,
indoor fan motor shuts off after a delay of 30 minutes.
6.6.4. The TIMER function is valid at the drying mode.
6.7 Sensor malfunction
Malfunction display:
When the malfunction happened at the same time, the priority is E4> E2> E1>P1
6.8 Some standard functions synopsis
6.8.1. Timer function
When the unit is on, firstly press the Timer button, the TIMER OFF indicator light illuminates. It
indicates the Auto Stop program is initiated. When the unit is off, firstly press the Timer button,
the TIMER ON indicator light illuminates. It indicates the Auto Start program is initiated. Press
or hold the UP or DOWN button to change the Auto time by 0.5 hour increments, up to 10 hours,
then at 1 hour increments up to 24 hours. The control will count down the time remaining until
start. The selected time will register in 5 second and the system will automatically revert back
to display the previous temperature setting. Turning the unit ON or OFF at any time or
adjusting the timer setting to 0.0 will cancel the Auto Start/Stop timed program. When the
malfunction (E1 or E2) occurs, the Auto Start/Stop timed program will also be cancelled.
6.8.2. Sleep function
Press this button, the selected temperature will increase (cooling) or decrease (heating) by
1℃/2℉30 minutes. The temperature will then increase (cooling) or decrease (heating) by
LED display Stand for
E2 T2 sensor malfunction
E1 T1 sensor malfunction
E4 Communication malfunction for display board and PCB
P1 Water full protection

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another 1℃/2℉after an additional 30 minutes. This new temperature will be maintained for 7
hours before it returns to the originally selected temperature. This ends the Sleep mode and
the unit will continue to operate as originally programmed.
7 Installation details
7.1 Installation instructions
The air conditioner should be placed on a firm foundation to minimize noise and vibration. For safe and
secure positioning, place the unit on a smooth, level floor strong enough to support the unit. The unit
has casters to aid placement, but it should only be rolled on smooth, flat surfaces. Use caution when
rolling on carpet surfaces. Do not attempt to roll the unit over objects. The unit must be placed within
reach of a properly rated grounded socket. Never place any obstacles around the air inlet or outlet of
the unit. Allow at least 30cm of space from the wall for efficient air-conditioning.
Your window slider kit has been designed to fit most standard "Vertical" and "horizontal" window
applications. However, it may be necessary for you to improvise/modify some aspects of the installation
procedures for certain types of window. Please refer to Fig. 2 & Fig.3 for minimum and maximum
window openings. Window slider kit can be fixed with a bolt (see Fig.3a).
Location
Window slider kit Installation

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56.2cm (1.84ft)
98.2cm (3.22ft)
56.2cm (1.84ft)
98.2cm (3.22ft)

15
56.2cm (1.84ft)
98.2cm (3.22ft)
56.2cm (1.84ft)
98.2cm (3.22ft)

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Note: If the window opening is less than the mentioned minimum length of the window slider kit, cut that
one with a hole in it short to fit for the window opening. Do never cut out the hole in window slider
kit.
1. Cut the foam seal (adhesive type) to the proper length and attach it to the window stool. Fig.4
2. Attach the window slider kit to the window stool. Adjust the length of the window slider kit according to
the width of window. Shorten the adjustable window kit if the width of window is less than 27 inches.
Open the window sash and place the window slider kit on the window stool. Fig.5
Installation in a double-hung sash window
22.1〞~38.6〞
22.1〞~38.6〞

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3. Cut the foam seal (adhesive type) to the proper length and attach it on the top of the window. Show as
in Fig.6
4. Close the window sash securely against the window.
5. Cut the foam seal to an appropriate length and sealing the open gap between the top window sash
and outer window sash. Show as in Fig.7

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The exhaust hose and adaptor must be installed or removed in accordance with the usage mode.
1. Install the window Exhaust adaptor B onto the exhaust hose as shown in Fig.8 or Fig.9. Refer to the
previous pages for window kit installation.
2. Push the Exhaust hose into the air outlet opening along the arrow direction (See Fig.10)
COOL,HEAT(heat pump type) or AUTO mode Install
FAN,DEHUMIDIIFY or HEAT(electrical heat type) mode Remove
Exhaust hose installation