one MPPT not charge and say error 29

[janekx]

I have meed interesting behave. The driver is actual on 2,93 cerbo and Daly BMS, it monitors the battery well.
In system are 2 MPPTs
MPPT 450/100 and 250/85
both have setup 48V LIFEPO4
driver is set 3,45V charge 60A discharge 100A

I have found the MPPT 250/85 charge and 450/100 not, even i disable 250/85 the 450/100 not start charge battery. How 250/85 charge close to 55V the 450/100 say voltage protection 29error.

Any idea why 450/100 is so asocial in setup ?
Thnaks

[janekx]

Mppt 450/100 was faulty, device exchange fix issues