Trane chiller Rtaa 324 - display no communicatio

[anish]

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

[CV_Geardrive]

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

[anish]

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

Pls advice