TCL Diagnostics & Fault Manuals
Manufacturer of TCL systems and diagnostic equipment.
Equipment Models
Hardware families produced by TCL
Indexed Error Codes for TCL
Machine-verified error code diagnostic walkthroughs
Address Overflow Capacity Fault
Error code A+ indicates an indoor unit addressing allocation overflow or capacity mismatch on the TCL DM4 VRF outdoor master board. The main outdoor microcontroller (MCU) triggers this lockout when detected indoor units exceed address registry limits, duplicate addresses exist, or total indoor capacity exceeds 130% of rated outdoor tonnage.
Fresh Air Module Actuator Failure
Error E9 triggers on the TCL FreshIN 3.0 when the indoor main PCB detects a synchronization timeout, abnormal current draw, or missing Hall sensor feedback from the motorized fresh air intake blower and damper assembly.