Midea MP12HMB63 User manual

SERVICE MANUAL
PTACSERIES
7,000-15,000 BTU/H

1.Precaution
1.1 Safety Precaution
1.2 Warning
2. Dimensions
3. Unit Components
4. Installation Details
4.1 How to Install Unit
4.2 Care and Cleaning
4.3 Other Installations
CONTENTS
5. Functions and Control Panel
6. Refrigerant Cycle Diagram
7. Electronic Function
7.1 Terms and Definitions
7.2 Electric Control Working Environment
7.3 Protection Function
7.4 Operation of Fan Motor
7.5 Operation of Compressor
7.6 DIP Switches and Jumper Selection
8. Operations Characteristics
8.1 Cooling Operation
8.2 Heating Operation
9. Power Connection Options
10. Troubleshooting
10.1Error Display
10.2Troubleshooting
1-3
1
1-3
3
4
5-15
5-7
7-8
9-15
16-20
21
21-25
21
22
22
22-23
24-25
25
25
25
25
25
26-27
28-33
28
28-33

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1. Precaution
1.1 Safety Precaution
To prevent personal injury and/or property damage, follow the instructions below.
Failure to follow correct procedure may result in personal injury, death, and/or property damage. Before
servicing unit, read this service manual.
1.2 Warning
To reduce the risk of fire or explosion, electric shock, personal injury, death, product failure, or
property damage during the installation process, read and follow the warnings listed below.
•
Do not use a defective or underrated circuit breaker. Use a dedicated circuit on thisappliance.
•
For electrical work, contact the dealer/seller, a qualified electrician, or an authorized service center.
Do not disassemble or repair the product.
•
Ground the product.
•
Securely install the panel and cover of control box.
•
Avoid improper wiring or installation.
•
Use the correctly rated breaker and fuse.
•
Do not modify or extend the power cable.
•
Do not install, remove, or reinstall the unitunaccompanied.
•
Be careful when unpacking and installing around exposed sharp edges, especially the casing edges
and the fins on the condenser and evaporator.
•
For installation, always contact the dealer or an authorized service center.
•
Do not install the product on a defective installationstand.
•
Be sure the installation area does not deteriorate with age to avoid the basecollapsing.
•
Do not let the air conditioner run for a long period of time when there is high humidity and a door or
window is left open. Moisture may condense and wet or damagefurniture.
•
Do not pull out or damage the power cord duringoperation.
•
Do not place anything on the power cable.
•
Do not plug or unplug the power plug during operation.
•
Do not touch/operate the product with wet hands.
•
Do not place a heater or other appliance near the powercable.
•
Do not allow water get into the electric parts.
•
Do not store or use flammable gas near theproduct.
•
Do not use the product in a confined space for a long period of time to avoid oxygendeficiency.
•
If a flammable gas leaks, turn off the gas and open a window for ventilation before turning this
product on. Do not use the telephone or turn switches on oroff.
•
If strange sounds or smoke come from product, turn the breaker off or disconnect frompower
INSTALLATION

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supply.
● Stop operation and close window during a storm. If possible, remove product fromwindow.
● Do not open the product’s inlet grill while in operation. If the unit has an electrostatic filter, do not
touch it.
● Avoid having water enter the unit.
● If the product becomes soaked, flooded, or submerged in water, contact an authorized service
center.
● Ventilate the product from time to time when operating it near a stove or otherappliance.
● Turn themain power off when cleaning or troubleshooting the product.
● If the product will not be in use for a long period of time, disconnect it from the power supply or turn
off the breaker. An unintended operation may occur.
● Ensure that no one can step on or fall onto the outdoor unit.
To reduce the risk of injury or property damage after installing product, read and follow the
warnings listed below.
● Always check for gas (refrigerant) leakage after installing or repairing. Low refrigerant levels may
cause product failure.
● Install drain hose to ensure water drains away properly. A bad connection may cause water
leakage.
● Keep unit levelled when installing to avoid vibration or waterleakage.
● Do not install product where noise or hot air from the outdoor unit can bother others or damage
property.
● In order to avoid personal injury, use two or more people to lift and transportproduct.
● Do not install the product where it will be directly exposed to ocean breeze (salt spray). It may
cause corrosion, which, particularly on the condenser and evaporator fins, could cause product
malfunction or inefficient operation.
To reduce the risk of fire or explosion, electric shock, personal injury, health issues, product
failure, or property damage while the product is in operation, read and follow the warnings
listed below.
● Do not sit in the draft or expose skin directly to cool air for long periods oftime.
● Do not use unit for other purposes, such as preserving foods, works of art, etc., not intended for this
product. It is a consumer air conditioner, not a refrigeratingsystem.
● Do not block the inlet or outlet ofairflow.
● 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 filter. They aresharp.
● Always insert the filter securely. Clean the filter every two weeks or, if necessary, more since a dirty
filter reduces product efficiency and could cause product malfunction or damage.
● Do not insert hands or other object through air inlet or outlet. There are sharp, moving partsinside.
CAUTION
OPERATIONAL

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● Do not drink the water drained from the product. It isunsanitary.
● Use a firm stool or ladder when cleaning the product.
● Replace all batteries in the remote control with new ones. Do not mix old and newbatteries.
● Do not recharge or disassemble the batteries or dispose of them in afire.
● If the liquid from the batteries touches exposed skin and/or gets on clothing, wash with clean water.
Do not use the remote if the batteries haveleaked.
2. Dimensions
Dimensions
W x H x D (inches)
Dimension 1
No sleeve, rear grille, or rear net
42 x 15.9 x 20.9
Dimension 2
Includes sleeve with no rear grille and rear net
42 x 16 x 22.8
Dimension 3
Includes sleeve and rear net
42 x 16 x 23.1
Dimension 4
Includes sleeve, rear net, rear grille
42 x 16 x 23.9

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3. Unit Components
Decomposition
Figure

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4. Installation Details
4.1 How to Install Unit

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w
PREPARATION OF SLEEVE ASSEMBLY
(optional)
•For an existing sleeve, measure the wallsleeve
dimensions.
•Install the new air conditioner according to
these installation instructions to achieve the
best performance. All wall sleeves used to
mount the new air conditioner must be in good
structural condition and have a rear grille that
securely attaches to the sleeve or the overhang
of the sleeve to secure the new airconditioner.
•To avoid vibration and noise, make sure theunit
is installed securely and firmly.
•When installing the sleeve, make certain there
is nothing within 20 inches of the back that
would interfere with heat radiation and exhaust
airflow. (See Fig. 2)
Fig. 2
•Refer to the installation instruction of sleeve
assembly for more details.
UNIT INSTALLATION
•Carefully remove shipping tapesfrom thefront
panel. (See Fig.3)
•Remove the front panel (see Fig. 4) by pulling
out the bottom to release the tabs (A). Then lift
up (B).
•Remove the shipping screw from the vent door.
(See Fig.5)
•Rotatetheventcontrol levertoeitheropenor
closethevent door. (SeeFig. 6)
Dimensions of air conditioner

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UNIT INSTALLATION (CONTINUED)
• Keep unit levelled when lifting and sliding it
into wall sleeve. Once it is firmly against front
of wall sleeve, secure with 4 screws and
washers (supplied in the Sleeve Assembly)
through the unit overhang holes. (See Fig. 7
and Fig. 8)
• Reinstall front panel. (See Fig. 9) Place tabs
over top rail (A). Push inward at bottom until
panel snaps into place (B).
• If unit is installed where condensation
drainage can drip in an undesirable location,
an accessory drain kitshould be installed and
connected to drain system.
4.2 Care and Cleaning
FRONT PANEL AND CASE
Turn unit off and disconnect from power supply.
To clean, use water and a mild detergent. Do not
use bleach or abrasive materials. Some
commercial cleaners may damage the plastic
parts.
OUTDOOR COIL
Coil on outdoor side of unit should be checked
regularly. Unit will need to be removed to inspect
dirt build-up that will occur on the inside of the
coil. If clogged with dirt or soot, coil should be
professionally cleaned. Clean inside and outside
of outdoor coils regularly.
NOTE: Never use a high-pressure spray on coil.

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•The most important thing do to in order to
maintain unit efficiency is to clean the filters
once every two weeks as required.
•Clogged filters reduce cooling, heating and
airflow.
•Keeping filters clean will:
oDecrease cost of operation,
oSave energy,
oPrevent clogged indoor coil, and
oReduce risk of premature componentfailure.
VENT DOOR FILTER
IMPORTANT: Turn unit off
before cleaning
•If the vent door is open, gaining access
requires removing the unit from the wall
sleeve. Clean the vent filter twice a year or as
required.
•Make sure to remove the shipping screw from
the vent door. (See Fig.5)
•Rotate the vent control lever to open the vent
door. (See Fig.6)
•Remove the four screws from the vent door
filter. (See Fig.12)
•Pull out the vent door steel wire from the hole
of the vent door, then take off the vent door
and filter. (See Fig.12)
•Clean the filter. Dry thoroughly before
replacing.
•Replace the vent door, reinstall the four
screws.
•Reinsert the vent door steel wire.
•To clean air filters:
oVacuum off heavy soil,
oRun water through filter, and
oDry thoroughly before replacing.
!
CAUTION
UNIT DAMAGE HAZARD
Failureto followthis cautionmayresult in equipment
damage or improper operation.
Airflow restriction may cause damage to the unit.
!
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in
equipment damage or improper operation.
Do not operate unit without filters in place. If a
filter becomes torn or damaged, it should be
replaced immediately.
Operating without filters or with damaged ones
will allow dirt and dust to reach indoor coil and
will reduce cooling, heating, airflow, and
efficiency of unit. Airflow restriction may cause
damage to unit.