Trane Split System Error Code E6

9 12 mbh 60 and 50 hz no led.
Trane split system error code e6. It was recently installed by another tech that wired units up. Code if there is no fault or protection code it will be display nn normal display display operating mode 3 heating. Trane split system error codes mini tvr 5g error codes ceiling cassette error codes 1 trane split system error codes. It feeds 3 fan coils 4mxw6512a10nobo.
4 forced cooling operating fan speed grade 0 power off the total capacity requirements of the interior unit the capacity requirements of the revised external unit t3 piping temperature t4 environmert. He checked all control wires for each unit and they land on their designated spot.