Recently I replaced a logic board #031-00936 - 005 REV "G" for a # 031-00936-005 REV "I", which failed in a York chiller YSFAFAS5CTCS. The chiller came into operation again, but the motor current do not go beyond 58% FLA
(FLA=674 A at 380V), even after the load ramp time has elapsed and the LWT being away from the programmed setpoint.
Current programming are:
Chilled Water Set Point: 6 ° C
Ramp: 15 min at 60% FLA.
Current limit: 80% FLA.
Current measurement shown at display (L1 = 393 A, L2 = 374 A, L3 = 342 A), confirmed with external Amprobe with some minimum difference.
The J5 300-600V jumper at LCSSS was checked and it is configured to 600V (pin 1 and 2).
Somebody have had this problem before and could help?