UPS LCD shows 0148-002 Major alarm (ATS communication
failure) and cannot read data from ATS. ATS Tx/Rx communication led is OFF .
Symptoms : 1.1 No data from ATS in UPS LCD
1.2.Tx/Rx communication led on ATS is OFF
1.3 UPS ALARM – ATS FAULT 0148-002
2.Checking methods :
2.1.Check COM2 cable connection on monitoring interface card of UPS
After checking, if connection good go to 2.2
2.2.Check XT2 board 8 pin connection
After checking if connection is not good > go to 2.3
2.3Checking the CAN connection on PU1, PU2 and PU3
After checking, if connection is good > go to 2.4
2.4 Open ATS cover and check the ATS board on top connections. Check X32, X23 and X51 connections :
After checking ATS communication board on top, found out that X51 board was unplugged : Probably reason – Unplugged during transportation
X51 Weak connection :
Root cause : The X51 board on top of the ATS was unplugged (probably transportation or handling reasons) and the UPS cannot communicate with the ATS (automatic transfer switch) .
Plug in the X51 board on top of the ATS in order for the UPS to be able to communicate with the ATS.
After plug in the X51 board back in the ATS and UPS power ON, the alarm cleared and UPS can see data from ATS :