LG PAHCMS000 - User Manual

Other manuals for LG PAHCMS000

Questions and Answers

Peter WuJul 27, 2025

What to do if my LG Air Handlers AHU Communications Kit does not work?

R
Robert MullinsJul 28, 2025
If the AHU Communications Kit isn't working, start by checking the power supply's electrical connections and voltage. Next, verify the AHU Communications Kit's electrical connections, referring to the wiring diagram. Finally, inspect the AHU Communications Kit's electrical and mechanical components for any signs of damage.

Summary

Safety Instructions

General Safety Warnings

Explanation of WARNING and CAUTION symbols and guidelines for safe operation.

Installation Safety

Specific safety precautions related to product installation procedures.

Communication Kit

Mechanical Installation

Instructions for the physical mounting and setup of the communication kit.

Electric Wiring Work

Guidelines and requirements for connecting the electric wiring for the communication kit.

Controller Module

Module Identification

Details on identifying the main and communication controller modules by model and size.

Electric Characteristics

Information regarding electrical specifications, circuit breakers, and conductor sizing.

Summary

Safety Instructions

General Safety Warnings

Explanation of WARNING and CAUTION symbols and guidelines for safe operation.

Installation Safety

Specific safety precautions related to product installation procedures.

Communication Kit

Mechanical Installation

Instructions for the physical mounting and setup of the communication kit.

Electric Wiring Work

Guidelines and requirements for connecting the electric wiring for the communication kit.

Controller Module

Module Identification

Details on identifying the main and communication controller modules by model and size.

Electric Characteristics

Information regarding electrical specifications, circuit breakers, and conductor sizing.

This document serves as the Owner's & Installation Manual for an LG Air Conditioner, specifically an AHU (Air Handling Unit) Controller. It provides essential information for the safe and correct installation, operation, and maintenance of the device. The manual emphasizes that installation work must be performed by authorized personnel in accordance with national wiring standards.

Function Description

The LG Air Conditioner AHU Controller is a device designed to manage and control an Air Handling Unit. It acts as a communication kit and a controller module, facilitating the operation of the air conditioning system. The device is intended for use in conjunction with an AHU and requires an external power supply to function. Its primary role is to provide the necessary control interface and communication capabilities for the air conditioning system.

Important Technical Specifications

The manual details two main components: the Communication Kit and the Controller Module.

Communication Kit:

Dimensions:
- PAHCMR000: 300 mm (W) x 155 mm (D) x 300 mm (H)
- PAHCMS000: 380 mm (W) x 155 mm (D) x 300 mm (H)
Mounting: Requires 4 screws (field supplied) through Ø 9 mm (11/32 inch) holes for secure fixation.
Electrical Wiring:
- All field-supplied parts and materials, as well as electrical work, must conform to local codes.
- Only copper wire should be used.
- All wiring must be performed by an authorized electrician.
- A main switch or other means for disconnection, with contact separation in all poles, must be incorporated into the fixed wiring according to relevant local and national legislation.
- Minimum cross-sectional area of conductors:
  - Rated current of appliance 0.1 A: Nominal cross-sectional area 2.5 mm²

Controller Module:

Models and Sizes (A dimension):
- PAHCMM000 (Main module): 162 mm
- PAHCMCO00 (Communication module): 108 mm
Power Supply: Requires DC 12 V external power supply. It is crucial to select an insulating transformer that complies with IEC61558-2-6 and NEC Class 2.
Product Operation Range:
- Ambient Temperature: -20 ~ 65 °C DB (Dry Bulb)
- Humidity: 0 ~ 98 % (Non-Condensing)
Electric Characteristics:
- Recommended circuit breaker: ELCB (Earth Leakage Circuit Breaker).
- MFA (Maximum Fuse Amperes) is used for selecting the circuit breaker and ground fault circuit interrupter.
- Sectional Area (mm²) based on Rated Current (A):
  - ≤ 0.2 A: Tinsel cord
  - 0.2 and ≤ 3 A: 0.5
  - 3 and ≤ 6 A: 0.75
  - 6 and ≤ 10 A: 1
  - 10 and ≤ 16 A: 1.5
  - 16 and ≤ 25 A: 2.5
  - 25 and ≤ 32 A: 4
  - 32 and ≤ 40 A: 6
  - 40 and ≤ 63 A: 10
Ingress Protection Marking: IP20. This restricts installation locations, and LG Electronics is not responsible for installations non-compliant with IP20.

Usage Features

The manual primarily focuses on the installation and safety aspects rather than daily operational features for the end-user. However, it implies that the device serves as a central control point for an AHU system.

Maintenance Features

The manual does not explicitly detail maintenance features for the end-user. Instead, it emphasizes the importance of professional installation and repair to ensure the longevity and safe operation of the product. Key points related to maintenance and service include:

Professional Service: For installation and repairs, always contact the service center or a professional installation agency. Unauthorized work voids the warranty and makes the owner responsible for all repair costs.
Secure Attachment: Ensure the electrical part cover to the AHU Comm. Kit is securely attached to prevent fire or electric shock due to dust or water.
Grounding: Always ground the product to prevent fire or electric shock.
Water Ingress Prevention: Be cautious to prevent water from entering the product, as this can cause fire, electrical shock, or product damage. If the product is submerged in water, contact the service center immediately.
Drain Hose: Do not insert a drain hose into a drain or soil pipe, as this can lead to bad smells and corrosion of the heat exchanger or pipe.

Safety Instructions

The manual provides extensive safety guidelines categorized as 'WARNING' and 'CAUTION' to prevent unforeseen risks, damage, injury, or death.

WARNINGS:
- Installation or repairs by unqualified persons can lead to hazards.
- Do not keep or use flammable gases or combustibles near the equipment.
- Do not install, remove, or reinstall the unit yourself.
- Do not disassemble or repair the product randomly.
- Do not install the product in a place where it could fall.
- Always ground the product.
- Do not install the product on a non-parallel or defective stand.
- Keep flames away from the product.
- Do not use the power cord near heating tools.
- Do not allow water to run into electrical parts.
- Be cautious that water does not enter the product.
- Do not place heavy objects on the power cord.
- If the product is submerged in water, contact the service center.
- 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 supervised or instructed by a responsible person. Children should be supervised to ensure they do not play with the appliance.
- Do not insert a drain hose into a drain or soil pipe.
CAUTIONS:
- Use caution when unpacking and installing, as sharp edges may cause injury.
- Do not install the product in direct sunlight.
- If anyone other than a licensed professional installs, repairs, or alters LG Electronics air conditioning products, the warranty is voided, and the owner is responsible for all repair costs.