LG PACS4B000.ENCXLEU Guide d'installation

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LG AC Smart IV PACS4B000: IA et Téléchargement PDF | Fixfr
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User questions

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Michael K.

What steps should be taken if units are not responding on the AC Smart controller?

If units are not responding on the AC Smart controller, check the device's error status, ensure the device is not locked, verify that DI 1 port (emergency stop) is open and not in short-circuit, and confirm that RS485 communication cables are correctly connected with proper polarity.

K V

Michael K.

How should RS485 cables be connected between an outdoor unit and the AC Smart controller?

For RS485 cable connection, use a BUS topology and avoid star connections. Maintain correct polarity (A to A, B to B). The maximum distance between the AC Smart and the furthest device is 1,000m, requiring a 0.75 mm² cable or larger. Adhere to node limits, such as a maximum of 16 nodes for Multi V and 32 for Multiple/Simple units or ERV on one RS485 line.

K V

Michael K.

What should be done if AC Smart controlled units stop responding?

If the units connected to the AC Smart IV controller stop responding, check the following points: Status verification (error codes); Device lock control; Ensure that DI port 1 is not short-circuited (it should remain open except in emergencies, otherwise all connected devices will stop); Check the physical connection of the communication cables (RS485), ensuring polarity (A/B) and a BUS type topology.

K V

Michael K.

What are the wiring instructions for RS 485 cables for the AC Smart?

To connect the AC Smart to outdoor units and other devices via RS485, follow these instructions: Always use a BUS type connection for the RS485 line, avoiding star connections. Maintain polarity (connect A to A, and B to B) when connecting to the RS485 terminal. The maximum guaranteed distance is 1,000 m using a 0.75 mm² cable or larger. The maximum number of nodes allowed varies by equipment type (e.g., 16 nodes for Multi V, 32 for Multiple/Simple units or ERV).

K V

Michael K.

How to troubleshoot AC SMART units that are not responding?

If units are not responding on the AC Smart IV controller, check the following: 1. Status (error codes): Verify the connection status if an error icon is displayed, consulting the error codes section in the manual. 2. Locking: Ensure the device is not locked. 3. Emergency Stop: Check if DI 1 port is short-circuited; it should remain open unless in an emergency. 4. Physical Connection: Verify RS485 communication cables are correctly connected with correct polarity (A/B) and a BUS topology.

K V

Michael K.

How to connect RS485 cables to the AC Smart controller from outdoor units?

To connect the AC Smart controller to outdoor units via RS485, follow these guidelines: 1. Topology: Use a BUS connection; avoid a STAR connection. 2. Polarity: Maintain polarity (A to A, B to B) at the RS485 terminal. 3. Communication Limits: The maximum guaranteed distance is 1,000 m using a 0.75 mm² or larger cable. 4. Number of Nodes: The maximum number of nodes for an RS485 line varies by equipment type (e.g., 16 for Multi V, 32 for Multiple/Simple units or ERV).

K V

Michael K.

What should be checked if units are not responding on the controller?

Verify the error codes for connection status, ensure the device is not locked, and check that the DI 1 port is open (it should only be closed in emergencies). Additionally, verify that the RS485 cables are correctly connected with proper polarity.

K V

Michael K.

What are the requirements for RS485 communication cable wiring?

Use a BUS topology (avoid star connections) and maintain polarity (A to A, B to B). The maximum distance is 1,000 m using a cable of at least 0.75 mm². The number of nodes is limited based on the equipment type (e.g., 16 for Multi V, 32 for Simple units).

K V

Michael K.

How to connect the RS 485 cables between an outdoor unit and the controller?

Use a BUS type connection while respecting the A/B polarity. The maximum distance is 1,000 m using a cable of 0.75 mm² or larger. Avoid star-shaped connections.

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