Mitsubishi PAR-40MAA User Manual (2025)

All electric work must be performed by qualified personnel.

Do not install the unit in a place where large amounts of oil, steam, organic solvents, or corrosive gases, such as sulfuric gas, are present or where acidic/alkaline solutions or sprays are used frequently. These substances can compromise the performance of the unit or cause certain components of the unit to corrode, which can result in electric shock, malfunctions, smoke, or fire.

To reduce the risk of shorting, current leakage, electric shock, malfunctions, smoke, or fire, do not wash the controller with water or any other liquid.

To reduce the risk of electric shock, malfunctions, smoke or fire, do not operate the switches/buttons or touch other electrical parts with wet hands.

To reduce the risk of injury or electric shock, stop the operation and switch off the power supply before cleaning, maintaining, or inspecting the controller.

To reduce the risk of injury or electric shock, before spraying a chemical around the controller, stop the operation and cover the controller.

To reduce the risk of injury, keep children away while installing, inspecting, or repairing the unit.

Properly install all required covers to keep moisture and dust out of the controller. Dust accumulation and water can cause electric shock, smoke, or fire.

To reduce the risk of damage to the controller, do not directly spray insecticide or other flammable sprays on the controller.

To reduce the risk of injury and electric shock, avoid contact with sharp edges of certain parts.

To reduce the risk of injury, wear protective gear when working on the controller.

Consult your dealer for the proper disposal of the controller.

To avoid injury from broken glass, do not apply excessive force on the glass parts.

To reduce the risk of fire or explosion, do not place flammable materials or use flammable sprays around the controller.

Do not install the unit where there is a risk of leaking flammable gas. If flammable gas accumulates around the unit, it may ignite and cause a fire or explosion.

Take appropriate safety measures against earthquakes to prevent the controller from causing injury.

Properly dispose of the packing materials. Plastic bags pose suffocation hazard to children.

To prevent injury, install the controller on a flat surface strong enough to support its weight.

To reduce the risk of shorting, current leakage, electric shock, malfunctions, smoke, or fire, do not install the controller in a place exposed to water or in a condensing environment.

Controller must be installed by qualified personnel according to the instructions detailed in the Installation Manual. Improper installation may result in electric shock or fire.

Install the top case into the bottom case until it clicks.

When attaching the cover and the top casing to the bottom casing, push it until it they click into place. If they are not properly locked into place, they may fall, causing personal injury, controller damage, or malfunctions.

To reduce the risk of damage to the controller, malfunctions, smoke, or fire, do not connect the power cable to the signal terminal block.

Properly secure the cables in place and provide adequate slack in the cables so as not to stress the terminals. Improperly connected cables may break, overheat, and cause smoke or fire.

To reduce the risk of injury or electric shock, switch off the main power before performing electrical work.

All electric work must be performed by a qualified electrician according to the local regulations, standards, and the instructions detailed in the Installation Manual.

To reduce the risk of electric shock, install a breaker and a residual current circuit breaker on the power supply. To reduce the risk of electric shock, smoke, or fire, install a breaker for each controller.

Use properly rated breakers and fuses (breaker, local switch <switch + fuse>, no-fuse breaker). Breaker with a breaking capacity greater than the specified capacity may cause electric shock, malfunctions, smoke, or fire.

To reduce the risk of current leakage, overheating, smoke, or fire, use properly rated cables with adequate current carrying capacity.

Proper grounding must be provided by a licensed electrician. Do not connect the grounding wire to a gas pipe, water pipe, lightning rod, or telephone wire. Improper grounding may result in electric shock, smoke, fire, or malfunction due to electrical noise interference.

To reduce the risk of electric shock, shorting, or malfunctions, keep wire pieces and sheath shavings out of the terminal block.

To reduce the risk of shorting, current leakage, electric shock, or malfunctions, keep the cables out of contact with controller edges.

Securely seal the cable access holes with putty to prevent condensation, water, and insects from entering and causing electric shock, malfunctions, or fire. Water infiltration and condensation formed inside the unit may damage the circuit board.

The controller should be repaired or moved only by qualified personnel. Do not disassemble or modify the controller. Improper installation or repair may cause injury, electric shock, or fire.

To reduce the risk of electric shock, shorting, or malfunctions, keep wire pieces and sheath shavings out of the terminal block.

To avoid damage to the unit, use appropriate tools to install, inspect, or repair the unit.

This controller is designed for exclusive use with the Building Management System by Mitsubishi Electric. The use of this controller for with other systems or for other purposes may cause malfunctions.

To avoid discoloration, do not use benzene, thinner, or chemical rag to clean the controller. To clean the controller, wipe with a soft cloth soaked in mild detergent that is diluted with an appropriate amount of water, and wipe down with a wet cloth followed by a dry cloth. Do not use the detergent straight.

To avoid damage to the controller, provide protection against static electricity.

Take appropriate measures against electrical noise interference when installing the air conditioners in hospitals or facilities with radio communication capabilities. Inverter, high-frequency medical, or wireless communication equipment as well as power generators may cause the air conditioning system to malfunction. Air conditioning system may also adversely affect the operation of these types of equipment by creating electrical noise.

To avoid malfunctions, do not bundle power cables and signal cables together, or place them in the same metallic conduit.

Leave the circuit board and its protective film on the case.

To avoid damage to the controller, do not overtighten the screws.

Use a flat-head screwdriver with a blade width of 3-5 mm (1/8-7/32 inch).

Do not turn the flat-head screwdriver with fitting it in the latch strongly.

To avoid deformation and malfunction, do not install the remote controller in direct sunlight or where the ambient temperature may exceed 40ºC (104ºF) or drop below 0ºC (32ºF).

Do not install the controller on the control panel door. Vibrations or shocks to the controller may damage the controller or cause the controller to fall.

Secure the cable with a clamp.

Do not use solderless terminals to connect cables to the terminal block. Solderless terminals may come in contact with the circuit board and cause malfunctions or damage the controller cover.

After connecting the connector, install the top case properly.

If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or similarly qualified persons in order to avoid a hazard.

This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance.

This appliance is intended to be used by expert or trained users in shops, in light industry and on farms, or for commercial use by lay persons.

To avoid damage to the controller, use appropriate tools to install, inspect, or repair the controller.

To prevent malfunctions, do not remove the protective film or the circuit board from the casing.

Do not install the controller on the control panel door. Vibrations or shocks to the controller may damage the controller or cause the controller to fall.

To avoid damage to the controller, do not make holes on the controller cover.

Hold the cables in place with clamps to prevent undue force from being applied to the terminal block and causing cable breakage.

Parts name Qty. Appearance

Remote controller (top case) 1 Right figure *1

Remote controller (bottom case) 1 Right figure *2

Roundhead cross slot screws M4×30 2 *3

Wood screw 4.1×16 (for direct wall installation)

2*3

Simple Manual 1

Bottom case *2Top case *1

TB5 TB15

TB5 TB15

bb

TB5 TB15

c

TB5 TB15

b

TB5 TB15

b

TB5 TB15

b

TB5 TB15

b

TB7 TB3

TB5 TB15

TB5 TB15

TB7 TB3

(1)

(1)

(3)

(3)

(3)

(3)

(2)

(2)

(2)

(4)

(1)

(1)

a

a

dd d

d

bb

f

g

e

e

Address = 51

Address = 01 Address = 02

Address = 55

Address = 08

Address = 07

Address = 03

Address = 04 Address = 09

Address = 06

Address = 05

Group 01 Group 02 Group 03

Group 04

ed

NOTE: When interlocking the MA remote controller with a LOSSNAY or OA processing unit,

always set the address of all the indoor units in the group and the address of the LOSSNAY or OA processing unit.

(1)

TB5

TB4

TB1

TB4

(3)

(3)

(1)

TB4

TB4

TB5

TB1

a

bb

d

a

bb

de

(3)

Refrigerant address = 00

Simultaneous twin Simultaneous twin

Refrigerant address = 00

Standard 1:1 Simultaneous twin

Simultaneous triple

Refrigerant address = 01 (Sub)

Refrigerant address = 00 (Main)

Refrigerant address = 02 (Sub)

TB4

TB4

TB4

TB4

TB4

TB4

TB1

TB1 TB1

TB1

TB5

TB5

TB5

TB5 TB5 TB5

a

bbb bbb

aa a

dd de

Refrigerant address = 00

Refrigerant address = 00

Refrigerant address = 01

Refrigerant address = 00

Simultaneous twin Standard 1:1 Simultaneous twin Standard 1:1

■ Discrepancy between the indoor temperature measured at the wall and the actual

indoor temperature may occur.

If the following conditions are met, the use of the temperature sensor on the indoor unit is recommended.

• Supply air does not reach to the wall easily where the remote controller is installed due to improper airflow distribution.

• There is a great discrepancy between the wall temperature and the actual indoor temperature.

• The back side of the wall is directly exposed to the outside air.

Note: When temperature changes rapidly, the temperature may not be detected accurately.

Important

Do not install the controller in a place where the difference between the remote controller surface temperature and the actual room temperature will be great. If the temperature difference is too high, room temperature may not be adequately controlled.

To reduce the risk of malfunctions, do not install the controller in a place where water or oil may come into contact with the controller, or in a condensing or corrosive environments.

To avoid deformation and malfunction, do not install the remote controller in direct sunlight or where the ambient temperature may exceed 40ºC (104ºF) or drop below 0ºC (32ºF).

To reduce the risk of malfunctions and damage to the controller, avoid installing the remote controller on an electrically conductive surface, such as an unpainted metal sheet.

Refer to either of the following manuals for temperature sensor setting: indoor unit Installation Manual for CITY MULTI; this manual for Mr. SLIM.

Temperature sensor

Unit: mm (in)

External dimensions of remote controller

Minimum required space

around the remote

controller

Wall

Conduit tube

Locknut

Switch box

Seal the gap

with putty. Remote controller cable

Bushing

To reduce the risk of electric shock, malfunctions, or fire, seal the gap between the cables and cable access holes with putty.

Top case Bottom case

Sheath

Unit: mm (in)

Connect the cable. (non-polarized)

2-core wire must not be seen on the back.

Seal the gap with putty.

Route the cable behind the remote controller.

Remote controller cable

To reduce the risk of electric shock, shorting, or malfunctions, keep wire pieces and sheath shavings out of the terminal block.

Do not use solderless terminals to connect cables to the terminal block. Solderless terminals may come in contact with the circuit board and cause malfunctions or damage the controller cover.

Important