Trane 4TVH0086FE000AA Service Manual page 97

The specific error codes xL0, xL1, xL2 and xL4 can also be obtained from the inverter module LED indicators. If an inverter
module error has occurred, LED2 is continuously on and LED1 flashes.
Figure 6-2.4: LED indicators LED1 and LED2 on inverter module
Table 5-3.2: Errors indicated on LED1
Flashes 8 times and stops for 1 second, then repeats
Flashes 9 times and stops for 1 second, then repeats
Flashes 10 times and stops for 1 second, then repeats
Flashes 12 times and stops for 1 second, then repeats
LED1 flashing pattern Corresponding error
xL0 - Inverter module protection
xL1 - DC bus low voltage protection
xL2 - DC bus high voltage protection
xL4 - MCE error
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