Reasons for PCS KNOCK OUT BUT BP IS 5.2

PCS KNOCK OUT BUT BP IS 5.2 
a) MR PRESSURE LOW,  
b) MASTER CONTROLLER SWITCH DEFECT,  
c) COR RELAY DEFECTS. 
d) TH NOT IN IDLE 
e) CR PCS OPEN 
f) PCR INTERLOCK DEFECT 
g) PCR COIL OPEN 
h) CONTROL BREAKER /FP & Cont switch DEFECT