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BQ24650: Battery is not charging with Charge Controller

Part Number: BQ24650
Other Parts Discussed in Thread: CSD18512Q5B

Hi TI Team,

We are using BQ24650 to charge LiFePo4 battery with 24V, 8A solar panel and programmed output of charge controller is 14 V with fast charge current of 20A. In one PCB BQ24650 charges battery , but in two other PCB charge controller is not charging the battery. In this PCB, STAT1 is ON (Low) and STAT2 is OFF (High) means charge is in process, but voltage at output is 1.2V. The voltages measured are 

VMPPSET = 1.31v

VTS = 2V

VFB = 0.178V


We are using CSD18512Q5B MOSFET's. After replacing MOSFET's one PCB is working and other is not working. But in removed MOSFET's we didn't observe any fault. Is this due to precharge condition or what. 

Any help is appreciated.

Thanks in Advance.