18-GJ89D1-1F-EN
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Fault Reporting
The Air Handler Control (AHC) will show active faults and store
historical faults in 24 volt mode. In 24 volt mode, the AHC will report
active faults continuously and will report the last four faults stored
after a power cycle of the unit. Refer to the LED flash code or
Diagnostics Mobile App for fault code identification.
In Link Communicating mode, faults will report to the UX360 User
Interface Service Menu and Diagnostics Mobile App.
AHC
J15 24 Volt low
voltage harness
Red Fault LED
S1 BLE
Button
J12
Table 28. RED LED Fault Codes
Flash
Code
Alarm Group Alarm
2
Equipment Missing, Mismatch or Configuration Issue No Model Number, Bad Model Number, No Valid Configuration
3
Blower Issue Blower Communication, Low or No Airflow, Blower Motor Power High,
Blower Motor Mismatch
4
EEV Issue Coil is shorted or open, Valve Stuck, ET, GT, Low SH, High SH
5
Sensor Issue SAT Sensor out of range, RA Static Pressure Sensor out of range
6
Indoor Heat Issue CFG1–Electric Heat not detected, CFG2–Electric Heat not configured
7 External Switch Switch 1 or Switch 2
8 Condensate Issue
9 Frost Issue
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