30GTN226 Carrier Chiller

[OkonedoCharles]

Good day Engrs
I have some 30gtn carrier chillers with 7 compressors, 4 compressors in Cir A and 3 compressors in Cir B
ALARM...
I have some compressor with the alarm '' compressor failure ''
I have checked the CRs, CXB, MBB, high pressure switch, compressors... And all seem OK. But the alarms still remain.
PLEASE CAN ANYONE ASSIST ON WHAT TO DO NEXT.. THANK.

[Gibbo]

Have you checked the feedback from the Control Relay to MBB. Control relay may be made but feedback signal is not made.
Gibbo