ACTIONAIR MIA-SM (01) PDF MANUAL

Incorrect installation due to ignoring instructions can cause serious damage or injury.

Failure to observe a caution may result in injury or equipment damage.

Failure to observe a warning may result death or serious injury.

All on site wires and components must be installed by licensed electricians and must comply with local and national laws and regulations. Users are prohibited from installing these wires and components by themselves.

On site wiring must follow the wiring diagrams and the following instructions. Incorrect installation or connection of equipment or accessories may lead to electric shock, short circuits, leaks, fires or other damage.

Be careful not to bend the circuit board when inserting or removing a connection wire.

Before cleaning or maintenance, ensure the power supply is cut off.

Do not clean the board with water to avoid electric shock.

Do not operate with wet hands to avoid electric shock.

Do not use pesticides, disinfectants, or flammables directly on the board as they may damage the board or cause fires.

Do not connect the communication wire when the power is on. Otherwise, the circuit board will be damaged.

Do not connect the power cable (high voltage) to the communication (low voltage) terminal. Otherwise, the circuit board will be damaged.

Note the distinction between the communication port of the upstream IDU and that of the downstream IDU. Be careful not to confuse the two. Otherwise, communication failure will occur.

Use the specified cables as communication wires and do not place any heavy objects on the wiring terminals.

Do not install the device in an environment that exposes the unit to corrosive, flammable or explosive materials or oil mist (such as a kitchen).

Do not install the expansion board outdoors or in a wet place, and protect it from direct sunlight. Do not knock, throw, or randomly disassemble the board.

Please install the expansion board after painting the wall to prevent water, lime and sand from entering the board.

The Switch Module (MIA-SM) includes the following accessories:

*The mounting box cover is only applicable to circular cassette Indoor Unit (IDU).

The Expansion Board Assembly (MIA-EK01) includes the following accessories:

The Expansion Board Assembly (MIA-EK02) includes the following accessories:

Step 1: Remove the switch module from the accessory package. Insert the connector, located at one end of the switch module’s plastic base, into the designated socket inside the electric control box. Secure the connector to the reserved screw holes in the electric control box using the ten ST3.9 screws provided in the accessory package.

Step 2: Remove the communication adapter wire from the switch module accessory package. Connect the terminals of the wire to the Extend CN18 port on the IDU main control board and the Extend CN1 port on the switch module. Ensure the terminals are securely fastened to the ports to prevent any risk of loosening.

Step 1: Remove the switch module from the accessory package. Insert the connector extending from one end of the switch module’s plastic base into the designated socket in the electric control box. Using the ten ST3.9 screws provided in the accessory package, secure the connector to the reserved screw holes in the electric control box.

Step 2: Remove the communication adapter wire from the switch module accessory package. Connect the wire terminals to the Extend CN18 port on the IDU main control board and the Extend CN1 port on the switch module. Ensure the terminals are firmly secured to the ports to prevent any risk of loosening.

Step 1: Remove the switch module from the accessory package. Insert the connector extending from one end of the switch module’s plastic base into the designated socket in the electric control box. Secure the connector to the reserved screw holes in the electric control box using the ten ST3.9 screws provided in the accessory package.

Step 2: Remove the communication adapter wire from the switch module accessory package. Connect the terminals of the wire to the Extend CN18 port on the IDU main control board and the Extend CN1 port on the switch module. Ensure the terminals are securely fastened to the ports to prevent any loosening.

Step 1: Remove the switch module from the accessory package. Insert the connector extending from one end of the switch module’s plastic base into the designated socket on the air guide ring. Secure the assembly to the reserved screw holes on the air guide ring using the ten ST3.9 screws provided in the accessory package.

Step 2: Remove the communication adapter wire from the switch module accessory package. Connect the terminals of the wire to the Extend CN18 port on the IDU main control board and the Extend CN1 port on the switch module. Ensure the terminals are firmly and securely connected to the ports to prevent any loosening.

Step 3: Remove the mounting box cover from the accessory package. Attach the cover to the base of the adaptor board. Ensure that the communication adapter wire is routed through the outgoing wire hole.

Step 1: Remove the switch module from the accessory package. Insert the connector extending from one end of the switch module’s plastic base into the designated socket in the electric control box. Secure the connector to the reserved screw holes in the electric control box using the ten ST3.9 screws provided in the accessory package.

Step 2: Remove the communication adapter wire from the switch module accessory package. Connect the terminals of the wire to the Extend CN18 port on the IDU main control board and the Extend CN1 port on the switch module. Ensure the terminals are securely connected to the ports to prevent any risk of loosening.

The dimensions of the mounting box for Expansion Board #1 are:

• Length: 170mm
• Width: 90mm
• Height: 50mm
• Mounting hole diameter: 2.25mm
• Mounting hole spacing (horizontal): 85mm
• Mounting hole spacing (vertical): 140mm
• Screw hole diameter: 5mm (4 holes)

The dimensions of the mounting box for Expansion Board #2 are:

• Length: 243mm
• Width: 159mm
• Height: 66.2mm
• Mounting hole diameter: 15mm (for plastic expansion pipe insertion)
• Mounting hole diameter: 20mm (for screw insertion, 4 holes)
• Mounting hole spacing (horizontal): 228mm

Step 1: Press the screwdriver icon on the cover to release the buckle from the base, and open the upper cover. Install the power cables and communication wires according to the provided wiring diagrams.

Step 2: Drill four round holes with a diameter of 6 mm into a flat wall or other suitable surface, following the screw hole dimensions specified in Section 1.1 – Dimensions of the Mounting Box for Expansion Board #1. Next, remove the plastic expansion pipes from the accessory package and insert them into the drilled holes.

Step 3: Take out the mounting box from the accessory package, and fix its base in the plastic expansion pipes that have been properly installed in Step 1 with 25 screws (ST3.9) provided in the accessory package.

Do not operate when the power supply is on.

Do not use excessive force when raising the upper cover to avoid damaging the cover or the circuit board.

Step 4: Connect the expansion board #1, switch module, and external devices based on the site requirements and according to the wiring diagram of the expansion board #1 as described in Section 04.04. Port Definition and Function Description. Then, wrap the wires with ties provided in the accessory package.

Step 5: Upon power on and commissioning, ensure that the device works properly. Upon power off, connect the cover of the mounting box to its base with 8 screws (ST2.9) provided in the accessory package.

Route the wires through the designated outgoing wire hole.

Secure the wires using the large and small clamps provided in the accessory package. Attach the clamps to the base of the mounting box using the ten ST3.9 screws included in the accessory package.

Make sure that no cables are clamped when buckling the upper cover and bottom cap of expansion board #1.

Step 1: Drill four round holes with a diameter of 6 mm on a flat wall or any other material surface based on the screw hole dimensions given in Section 1.1 – Dimensions of mounting box of expansion board #2. Then, take out the plastic expansion pipes from the accessory package and install them into the holes.

Step 2: Take out the mounting box from the accessory package, and fix its base in the plastic expansion pipes that have been properly installed in Step 1 with 25 screws (ST3.9) provided in the accessory package.

Step 3: Connect the expansion board #2, switch module, and external devices based on the site requirements and according to the wiring diagram of the expansion board #2 as described in Section 3 – Port Definition and Function Description. Then, wrap the wires with ties provided in the accessory package.

The main components and connections for the switch module system are:

1 – IDU main control board

2 – Switch module

3 – Expansion Boards #1 and #2

4 – Refrigerant leakage detection device

5 – Communication wire set

6 – Shield layer grounding label

CN5-A and CN5-B are input ports. They connect to the fault signal transmission port of the R32 refrigerant leakage detection device. Refer to Table 1 for the description on port input signals.

CN3-D is an input port. It connects to the common port of the R32 refrigerant detection device.

Electrical Characteristics:

1. The refrigerant leakage detection device is a DC device (≤ 30 V, 3 mA).

2. The refrigerant leakage detection device is an AC device (≤ 240 V, 3 mA).

Note: The refrigerant detection device (Sensor) can be purchased from Actron.

Wire Specifications:

Provided on site: flexible polythene sheathed 3-core cords (cross section ≥ 0.75 mm², length up to 50 m), R32 refrigerant leakage detection devices (purchased from the factory, or purchased from a third party based on the electrical characteristics).

CN3-C is an input port and is Reserved.

CN7 is an output port for linkage between external devices (such as Fresh Air Package Unit (FAPU) and air valve) and the IDU.

Electrical Characteristics:

1. For DC external devices, select DC power supply (≤ 30 V, 1 A).

2. For AC external devices, select AC power supply (≤ 240 V, 1 A).

Wire Specifications:

Provided on site: flexible polythene sheathed cords (cross section ≥ 1.5 mm², length up to 50 m), external devices supply. Whether to use relays depends on the working characteristics of the external devices.

CN1 is an output port. It connects to the CN18 port of the IDU main control board for communication between the switch module and the IDU main control board.

Electrical Characteristics:

Count from right to left.

Between the 5th pin and the 6th pin: +12 VDC.

Between the 8th pin and the 9th pin: +5 VDC GND2 GND +5V +12V.

Wire Specifications:

Provided by the factory: See adapter wires in the accessory package.

CN2-E1: Connects the CN1-E1 port of the expansion board for communication between the switch module and the expansion board.

CN2-E2: Connects the CN1-E2 port of the expansion board for communication between the switch module and the expansion board.

CN2-GND: Connects the CN10-GND port of the expansion board.

CN2-+12V: Connects the CN10-+12V port of the expansion board to supply power for the CN10 port of the expansion board.

Electrical Characteristics:

Between the 1st pin and the 2nd pin (+12V and GND): +12 VDC, ≤ 1 A.

Between the 3rd pin and the 4th pin (E2 and E1): max +5 VDC, ≤ 1 mA (counting from the bottom up) +12V E1 E2 GND.

Wire Specifications:

Provided on site: flexible polythene sheathed 4-core cords (cross section ≥ 0.75 mm², length up to 50 m). The shielding layer should be grounded to the sheet metal of the electric control box.

1. Do not set the DIP switch until the AC power supply is cut off (because DIP switch setting is invalid when the power supply is on).

2. The factory default dial value for ENC1 dial is 0. During on-site installation, please select the appropriate dial value according to the port signal definition in the table below.

Warning: It is prohibited to select a total of 6 digits A~F on the ENC1 dial, otherwise it will cause the indoor unit to malfunction and fail to start or the adapter board to be damaged!

Table 1: Mapping between ENC1 DIP switch value and CN5-A/CN5-B/CN7 port signal

CN4 (Input): Connected to external power supply.

Electrical Characteristics:

AC: 220~240V, ≤1A; DC: ≤30V, 1A.

Wire Specifications:

Provided on site: flexible polythene sheathed cords (cross section ≥ 1.5 mm²).

CN5 (Input): Program writing port.

Electrical Characteristics:

5 V DC, ≤1 mA.

Wire Specifications:

Connected to the adapter connector of the program burner (provided by the factory).

CN7 (Input): The port is on the expansion board #1, and used for remote on/off control of the IDU by low current external devices, such as a 220 to 240 V hotel card adapter. It should be connected to a 220 to 240 V high current power source.

Electrical Characteristics:

220 ~ 240 V AC, ≤3 mA.

Wire Specifications:

Provided on site: external devices, power supply, flexible polythene sheathed cords (cross section ≥ 0.75 mm², length up to 50 m).

CN55 (IN/GND) (Input): The port is on the IDU main control board, and used for remote on/off control of the IDU by low current external devices, such as a 12 V hotel card adapter and a 12 V door and window linkage device.

Electrical Characteristics:

Between the two pins (IN and GND): 12 VDC, ≤ 1 mA.

Wire Specifications:

Provided on site: external devices, flexible polythene sheathed cords (cross section ≥ 0.75 mm², length up to 50 m).

Positive logic:

When the remote On/Off signals are low level signals, the port outputs remote forced power-off signals, and the IDU will remain off.

When the remote On/Off signals are high level signals, the port outputs remote power-on signals, and the IDU can remain on or off.

Negative logic:

When the remote On/Off signals are high level signals, the port outputs remote forced power-off signals, and the IDU will remain off.

When the remote On/Off signals are low level signals, the port outputs remote power-on signals, and the IDU can remain on or off.

The positive and negative logic of the CN55 (IN/GND) port of the IDU main control board is set by the wired controller/centralized controller. For the settings, see the operation instructions for the setting tools listed in Table 2.

The positive and negative logic of the CN7 port of the expansion board #1 is set by the S4-1 DIP switch on the board. For the settings, see Table 3.

When the CN7 port of the expansion board #1 is set to receive remote On/Off control signals, the CN55 (IN/GND) port of the IDU main control board becomes invalid (and it does not receive any remote On/Off control signal).

Table 2: Description on remote On/Off control of IDU, positive and negative logic setting for On/Off signals, delayed power-off setting

CN55 ON/OFF (Input): The port is on the expansion board #1, connected to the air differential pressure switch. The on/off control of the IDU is achieved based on the on/off signals of air pressure difference switch. The positive and negative logic for the output signals of the port is set by the DIP switch S4-2. For details, see Table 3.

Electrical Characteristics:

Between the two pins (ON and OFF): 12 VDC, ≤ 1 mA.

Wire Specifications:

Provided on site: air differential pressure switches, flexible polythene sheathed cords (cross section ≥ 0.75 mm², length up to 50 m).

CN1-E1 (Communication): Connects the CN2-E1 port of the switch module for communication with the board; Connects the CN1-E1 port of the expansion board for communication with other expansion boards.

CN1-E2 (Communication): Connects the CN2-E2 port of the switch module for communication with the board; Connects the CN1-E2 port of the expansion board for communication with other expansion boards.

Electrical Characteristics for CN1-E1 and CN1-E2:

Between the two pins (E2 and E1): max +5 VDC, ≤ 1 mA.

Wire Specifications for CN1-E1 and CN1-E2:

Provided on site: flexible polythene sheathed 4-core cords (cross section ≥ 0.75 mm², length up to 50 m). Note that the shielding layer should be grounded to the sheet metal of the electric control box.

CN10-GND: Connects the CN1-GND port of the switch module.

CN10-+12V: Connects the CN2-+12V port of the switch module to receive power supply for the CN2 port.

Electrical Characteristics for CN10-GND and CN10-+12V:

Between the two pins (+12 V and GND): +12 VDC, ≤ 1 A.

Wire Specifications for CN10-GND and CN10-+12V:

Provided on site: flexible polythene sheathed cords (cross section ≥ 0.75 mm², length up to 50 m).

CN6-DRY1, CN6-DRY2, CN6-DRY3 (Output): These ports’ positive and negative logic for signals are set by the S2-1, S2-2, and S3-1 DIP switches respectively (see Table 3). The signal type is set by the ENC1, ENC2, and ENC3 DIP switches respectively (see Table 4).

Electrical Characteristics for CN6-DRY1, CN6-DRY2, CN6-DRY3:

1. External devices connected to the DRY1/DRY2/DRY3 port must be provided with the same voltage, either DC or AC.

2. If the total load of the external devices connected to the DRY1/DRY2/DRY3 port is smaller than or equal to 30 VA (DC) or 230 VAC (1 amp), no separate power supply is required for the external devices.

3. If the total load of the external devices connected to the DRY1/DRY2/DRY3 port is larger than 30 VA (DC) or 230 VAC (1 amp), separate power supply is required for the external devices. See the DC/AC power supply in the dotted box in the “Connection between IDU and external devices”.

Wire Specifications for CN6-DRY1, CN6-DRY2, CN6-DRY3:

Provided on site: flexible polythene sheathed cords (cross section ≥ 1.5 mm², length up to 50 m), external devices, DC/AC power supply. Whether to use relays depends on the working characteristics of the external devices.

CN6-COME (Common port): Connected to the neutral line (AC) or negative terminal (DC).

Before setting DIP switch values, make sure that the power supply for the IDU is cut off. After completing the setting process, re-power on the IDU to make the logic take effect.

Table 3: S2/S3/S4/S5 DIP Switch Description

Table 4: Mapping between value setting of ENC1/ENC2/ENC3 DIP switch and signal type of DRY1/DRY2/DRY3 port

a. Positive logic:

When the IDU fails, the port is closed and outputs high level alarm signals; When the fault disappears, the port outputs low level signals.

b. Negative logic:

When the IDU fails, the port is disconnected and outputs low level alarm signals; When the fault disappears, the port outputs high level signals.

c. The positive and negative logic of the CN22 (ALRM/N) port of the IDU main control board is set by the wired controller. For the settings, see the operation instructions for the setting tools listed in table below. The positive and negative logic of the DRY1/DRY2/DRY3 port of the expansion board #1 is respectively set by the S2-1/S2-2/S2-3 DIP switch on the board. For the settings, see Table 3.

d. The fault alarm output of the CN22 (ALRM/N) port of the IDU main control board and the DRY1/DRY2/DRY3 port of the expansion board #1 operate independently and do not affect each other.

Setting of positive and negative logic for power-off signals

CN2 (Input): The port inputs 0 to 10 V voltage signals from the third-party controller.

The relationship between voltage signals and set temperatures is shown in Table 5. When no set temperature control signal is received, the default lower limit in cooling mode is 17°C and that in heating mode is 30°C.

Whether the port receives 0 to 10 V signals is set by the DIP switch S3-2. For details, see Table 3.

Electrical Characteristics:

0 to 10 VDC, ≤ 1 mA.

Note that the power supply voltage for the external controller should be within the range of 10 V ± 0.2 V. The port only supports DC power input. Do not connect it to AC power.

Wire Specifications:

Provided on site: flexible polythene sheathed cords (cross section ≥ 0.75 mm², length up to 50 m), third-party controller.

Table 5: Mapping between input voltage and set temperature (return air temperature control)

CN3 (Input): The port receives pollutant detection signals from the air quality sensor. Common substances detected by the air quality sensor are PM (PM2.5), formaldehyde (HCHO), carbon dioxide (CO2), and total volatile organic compounds (TVOC).

Electrical Characteristics:

5 V DC, ≤0.4 A.

Wire Specifications:

Connected to the adapter connector of the air quality sensor (provided by the factory, optional) the air quality sensor wire length for testing is about 1 meter.

CN5 (Input): Program writing port.

Electrical Characteristics:

5 V DC, ≤1 mA.

Wire Specifications:

Connected to the adapter connector of the program burner (provided by the factory).

CN8-Y, CN8-OB/W:

1. Whether the port receives input signals from the third-party controller is set by DIP switch S4-2 (The port does not receive such signals by default). For details, see Table 3.

2. If S4-2 is set to receive input signals, port Y receives compressor start commands from the third-party controller, and port O/B receives four-way valve opening commands from the third-party controller.

3. If port Y receives compressor start commands and port O/B receives four-way valve opening commands, the IDU will start heating; If port Y receives compressor start commands and port O/B does not receive any four-way valve opening command, the IDU will start cooling operation; If port Y does not receive any compressor start command, the IDU will start air supply operation regardless of whether port O/B receives four-way valve opening commands or not.

CN8-AUX/W2:

1. Whether the port receives auxiliary heater start signals from the third-party controller is set by DIP switch S4-2 (The port does not receive such signals by default). For details, see Table 3.

2. If S4-2 DIP switch is set to receive input signals, port AUX/W2 receives auxiliary heater start commands from the third-party controller. If the port detects that the IDU is equipped with an auxiliary heater, the auxiliary heater of the IDU will be forced to start regardless of the outdoor ambient temperature – T4; If the port detects the interruption of input signals, the auxiliary heater of the IDU will be forced to stop regardless of whether all the conditions for that start are met.

3. If S4-2 DIP switch is set not to receive input signals, port AUX/W2 is invalid (the auxiliary heater of the IDU is not controlled by third-party signals).

CN8-G1, CN8-G2, CN9-G3/G:

1. Whether the port receives fan speed signals from the third-party controller is set by DIP switch S4-2 (The port does not receive such signals by default). For details, see Table 3.

2. If the DIP switch is set to receive input signals, ports G1, G2, and G3/G receive commands for low speed operation, medium speed operation and high speed operation from the third-party controller respectively.

3. The IDU is allowed to receive only one fan speed signal at the same time. If it receives more than one fan speed signal at the same time, the IDU will operate by following the priority of high speed > medium speed > low speed. If the IDU does not receive any fan speed signal, it will stop. If the third-party controller can control only one fan speed, the signal cable should be connected to the G3/G port.

Electrical Characteristics for all these ports:

24 V AC, ≤0.2 A.

Wire Specifications for all these ports:

Provided on site: flexible polythene sheathed cords (cross section ≥ 0.75 mm², length up to 50 m), third-party controller.

CN9-C (Common port): Connected to the common port of the third-party controller.

CN11 (Input): The port receives the 24 VAC voltage converted by the linear transformer to supply power for the third-party controller.

Electrical Characteristics: 24V AC.

Wire Specifications: Connected to the output end adapter plug of the linear transformer (connected before delivery).

CN15 (Input): Connected to external power supply.

Electrical Characteristics: 220~240V AC, ≤1A.

Wire Specifications: Provided on site: flexible polythene sheathed cords (cross section ≥ 1.5 mm², length up to 50 m), external power supply.

CN1-E2 (Communication): Connects the CN2-E1 port of the switch module for communication with the board; Connects the CN1-E1 port of the expansion board for communication with other expansion boards. Also for CN1-E2 (RS485) communication.

Electrical Characteristics for CN1-E2: Between the two pins (E2 and E1): max +5 VDC, ≤ 1 mA.

Wire Specifications for CN1-E2: Provided on site: flexible shielded polyethylene 2-core sheathed cords (cross section ≥ 0.75 mm², length up to 50 m). Note that the shielded layer must be grounded to the sheet metal of the electric control box.

CN10 (Reserved), CN7 (Reserved), CN16 (Reserved): Only circuits are reserved, and no terminal blocks are provided.

Electrical Characteristics for reserved ports: /

Wire Specifications for reserved ports: /

CN12 (Output): The port transmits 220 VAC voltage to the input end of the linear transformer.

Electrical Characteristics: 220~240V AC.

Wire Specifications: Connected to the input end adapter plug of the linear transformer (connected before delivery).

CN13 (Output): The port outputs 24 VAC voltage to supply power for the third-party controller and the CN6 port.

Electrical Characteristics: 24 V AC, ≤0.2 A.

Wire Specifications: Provided on site: flexible polythene sheathed 2-core cords (cross section ≥ 0.75 mm², length up to 50 m). The R and C ports are connected to the 24 V and 0 V ports of the third-party controller respectively.

CN6-DRY2 (Output):

1. Connect one side of the CN6 port to the CN13-R port and receive AC24V voltage transmitted by the CN13 port;

2. The other side of the CN6 port is connected to a third-party controller, which is used to transmit the defrosting operation signal of the indoor unit to the third-party controller;

3. The positive and negative logic of the output signal of the CN6 port is set by dialing S3-1 (default port closed, output defrosting signal), as detailed in Table 6.

Electrical Characteristics: 24 V AC, ≤0.2 A.

Wire Specifications: Provided on site: flexible polythene sheathed cords (cross section ≥ 0.75 mm², length up to 50 m).

Before setting DIP switch values, make sure that the power supply for the IDU is cut off. After completing the setting process, re-power on the IDU to make the logic take effect.

Table 6: S1/S3/S4/S5 DIP Switch Description

When replacing the linear transformer (⑥ of Expansion board #2), the input port of the transformer is connected to CN12 through a strong wire, and the output port of the transformer is connected to CN11 through a weak wire.

1. One IDU main control board can be connected to only one 1# expansion board and up to four expansion boards (one 1# board and three 2# boards or four 2# boards).

2. Communication wires can only be connected in serial, and the shielding layer of any communication wire of the switch module must be grounded.

3. When multiple expansion boards are connected, use the DIP switch S5 on the boards to set the address. The same address cannot be repeated. (Note: AD-0, AD-1, AD-2 and AD-3 indicate the addresses of the expansion boards, which are set to 0, 1, 2, and 3 respectively.)

The expansion board can communicate with the main control board through the switch module. You can use either the 1# or 2# expansion board or both. The wiring diagram of multiple expansion boards is shown below, connecting to the IDU main control board via CN18 Extend, and then to the switch module via CN2 and Extend CN1, and finally branching out to multiple expansion boards (e.g., Expansion Board #1 and Expansion Board #2s) through their respective CN1, CN10, E1, E2, GND, and +12V ports, with the shield layer grounded.

The system components are:

1 – IDU main control board

2 – Switch module

3 – Expansion board #1

4 – Communication wire set

5 – Shield layer grounding label

6 – Expansion board #2