LG KCHH Series - User Manual

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INSTALLATION MANUAL

LG AIR-COOLED INVERTER SCROLL

HEAT PUMP CHILLERS – KCHH MODELS

Table of Contents

Questions and Answers

S
Sydney GonzalesAug 12, 2025
Why is my LG KCHH vibrating loudly?
- M
  Mark SmithAug 12, 2025
  If your LG Chiller vibrates loudly, several issues could be the cause. Start by checking if the fan-motor connecting bolt, motor-mount assembly, compressor assembly bolt, or frame assembly bolt are loose and tighten them if needed. Also, inspect the fan for balance and replace it if necessary, checking its rotation range beforehand. Finally, listen for abnormal noise from the motor (a noise in multiples of RPM) which could indicate a burnt motor bearing, requiring motor replacement.
K
Kelly SandersAug 16, 2025
What to do if the condensation pressure is high and my LG KCHH stops constantly?
- D
  Dylan WaltonAug 16, 2025
  If your LG Chiller's condensation pressure is high and it constantly stops, first check if the outdoor temperature is within the operating range. If the temperature is acceptable, inspect the condenser for accumulated particles and clean it if necessary. Finally, check the fan for any defects and replace it if needed.
A
Ashley JohnsonAug 20, 2025
How to troubleshoot an LG Chiller that does not start?
- T
  thallAug 20, 2025
  If your LG Chiller does not start, begin by checking the power supply to the device, including the over-current protection device and fuse. Ensure the device configuration and wiring are correct. Also, check for any active alarms and follow the alarm troubleshooting process, referring to the HMI input channel for alarm condition input. Finally, verify whether the compressor has entered a start delay time.
A
adam45Aug 23, 2025
What to do if my LG KCHH's evaporation pressure is low and it constantly stops?
- D
  Dana RowlandAug 25, 2025
  If the evaporation pressure in your LG Chiller is low and the product constantly stops, it could be due to insufficient refrigerant. Check for any leakage and refill the refrigerant as needed. Another potential cause is insufficient cold water. Inspect the cold water system, ensuring the rated flow is maintained, the cold water system valve is open, the pressure difference between the inlet and outlet is appropriate, and there is no air in the cold water system.
H
hilllindsayAug 27, 2025
Why my LG Chiller is constantly hunting for cold water temperature?
- J
  Jane Zhang DVMAug 27, 2025
  If your LG Chiller is constantly hunting for cold water temperature, it may be due to insufficient cold water. Check the cold water system to ensure the rated flow is correct. Verify that the valve of the cold water system is open, the pressure difference between the inlet and outlet is appropriate, there is no air in the cold water system, and the cooling load is within the appropriate range.
J
Joel WadeAug 30, 2025
How to fix resonance sound in LG KCHH Chiller?
- J
  Jason MillerAug 30, 2025
  If you notice a resonance sound coming from your LG Chiller, the rubber fixed condition of the motor mount might be defective, requiring replacement of the motor mount. Alternatively, there could be a pipe vibration defect around the compressor, in which case you should replace the anti-vibration rubber attached to the pipe.
B
Bryce GardnerSep 3, 2025
How to eliminate high frequency wave noise from the front of my LG Chiller?
- J
  Jessica LeeSep 3, 2025
  If you are experiencing a high-frequency wave noise from the front side of your LG Chiller, it may be due to a defect in the heat emitting fan in the control box. Try cleaning the area around the heat emitting fan.
M
Michael SmithSep 7, 2025
Why is the evaporation pressure high in my LG Chiller?
- B
  Billy GainesSep 7, 2025
  If the evaporation pressure of your LG Chiller is high, it may be due to a temporary rise in cold water temperature caused by an abnormal increase in load. This is not necessarily abnormal, but you should check if it is within the operating range.

LG KCHH Series Specifications

General

Type	Air-Cooled Chiller
Dimensions	Varies by model
Weight	Varies by model
Refrigerant	R410A
Compressor Type	Scroll
Power Supply	460V/3Ph/60Hz

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