LG PAHCMS000 - Troubleshooting

58
PRDCAM AHU Communication Kit Installation Manual
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TROUBLESHOOTING
Error Code Description Details
CH01 Return Air (Room) Thermistor Error
Return air (room) thermistor has disconnected from AHU, or
has short circuited.
CH02 Pipe In Thermistor Error
Pipe in thermistor has disconnected from AHU, or has short
circuited.
CH03
Communication Error Between Wired Remote Controller and AHU
Communications Kit
No communication signal for more than three (3) minutes
from the controller to the AHU Communications Kit.
CH05
Communication Error Between
AHU Communications Kit and Air-Source / Water-Source Unit
No communication signal for more than five (5) consecutive
minutes from AHU Communications Kit to the Air-Source
Heat Pump Unit.
CH06 Pipe Out Thermistor Error
Pipe out thermistor has disconnected from AHU, or has short
circuited.
Problem Cause Solution
AHU Communications
Kit Does Not Work
No Power Check the power supply electrical connections and voltage.
Wiring is Incorrect Check the AHU Communications Kit electrical connections (see wiring diagram).
AHU Communications Kit
is Damaged
Check AHU Communications Kit electrical and mechanical components.
EEV Kit Does Not
Work
Wiring is Incorrect Check the EEV Kit electrical connections.
Piping is Incorrect Check the piping connections between the EEV Kit and the outdoor unit.
Table 18: Troubleshooting.
Table 19: Error Code Table.
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.
Troubleshooting