Troubleshooting - LG PAHCMS000 Installation Manual

TROUBLESHOOTING

Troubleshooting
Table 18: Troubleshooting.
Problem
AHU Communications
Kit Does Not Work
EEV Kit Does Not
Work
Error Codes
• The error code function indicates when an operation failure occurs in the system, and provides self-diagnosis about the type of error.
• The error code is displayed on the wired remote controller and the control board LED on the air-source heat pump unit.
• If two or more two errors occur simultaneously, the smallest of the error code numbers is displayed first.
• When the problem causing the error code to appear is fixed, then the error code will immediately stop displaying on the LED.
Table 19: Error Code Table.
Error Code
CH01
CH02
Communication Error Between Wired Remote Controller and AHU
CH03
CH05
AHU Communications Kit and Air-Source / Water-Source Unit
CH06
58
Cause
No Power
Wiring is Incorrect
AHU Communications Kit
is Damaged
Wiring is Incorrect
Piping is Incorrect
Description
Return Air (Room) Thermistor Error
Pipe In Thermistor Error
Communications Kit
Communication Error Between
Pipe Out Thermistor Error
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Check the power supply electrical connections and voltage.
Check the AHU Communications Kit electrical connections (see wiring diagram).
Check AHU Communications Kit electrical and mechanical components.
Check the EEV Kit electrical connections.
Check the piping connections between the EEV Kit and the outdoor unit.
Return air (room) thermistor has disconnected from AHU, or
has short circuited.
Pipe in thermistor has disconnected from AHU, or has short
circuited.
No communication signal for more than three (3) minutes
from the controller to the AHU Communications Kit.
No communication signal for more than five (5) consecutive
minutes from AHU Communications Kit to the Air-Source
Heat Pump Unit.
Pipe out thermistor has disconnected from AHU, or has short
circuited.
Solution
Details