Trane chiller Rtaa 324 - display no communicatio

Hi all,
Trane chiller model RTAA 324
Shutdown for maintenance after completing job restored the power found display showing (adaptive control )
No Communication, No Valid Data.
Checked voltages and signals on the comms modules also checked fuses all seemed ok. Has anyone experienced this problem.

Kindly advice to fix the above

Hi Anish,
If wiring, voltage and communication cables are OK and red leds (receive – transmit) on the back of the display module are not blink, then most probably the main module A1 is dead.
Regards,
CV

The main module A1 can be repaired or to be replaced by new one..

Pls advice