• 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 / water-source 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 14: Error Code Table.
Communication Error Between Wired Remote Controller and AHU
AHU Communications Kit and Air-Source / Water-Source Unit
Return Air (Room) Thermistor Error
Pipe In Thermistor Error
Communication Error Between
Pipe Out Thermistor Error
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Return air (room) thermistor has disconnected from AHU, or
has short circuited.
Pipe in thermistor has disconnected from AHU, or has short
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 /
Pipe out thermistor has disconnected from AHU, or has short