Bit Master (Bm) Led; Com Led; Fault Led - Trane ACONT900AC43UA Service Manual

Air Handler

Bit Master (BM) LED

BM / Clock Signal LED Green (Figure 1
- LED on when AHC Clock is working.

COM LED

Communication (COM) LED Amber (Figure 1
- LED ON when first powered up
- LED Flashes the number of communicating
components in the system
(ex. communicating stat and furnace will equal two
flashes)
AH - A 4

Fault LED

F
)
The Fault LED will be turned on at power-up and will
remain on for a short time period and then turned off.
When no faults are present, the Fault LED will blink
once every 20 seconds.
G
)
When a fault has been detected, the control will flash
the Fault LED for a specified number of times to
indicate the nature of the fault. The last four faults will
be available for display at any time via the User
Interface.
The stored Fault Codes can be cleared using the User
Interface.