Modifi Cation Of Pcb Confi Guration - Hitachi RCUE40AG2 Service Manual

Troubleshooting
5.1.5. Modifi cation of PCB
Every Chiller is delivered with the correct priority confi guration (Master PCB and slave PCB). In case of a
Control PCB delivered as a spare part, it will be necessary to set the correct priority confi guration because it
is not known where it will be applied (Chiller model).
In case that this priority confi guration is not correct, the Chiller cannot operate. See next point.
Problem detection

When the priority confi guration is not correct, on the 7 segment it is displayed:
 
:
7 segments on PCB
A A A
Confi guration

To establish the right priority confi guration in each PCB
PCB (PCB and PCB and PCB
A A A
with 5 cycles, it is necessary to connect an additional operation PCB (PCB
priority confi guration in this subsidiary control PCB (PCB
Next drawings shows the controls required for this procedure.
pag. 100
SMGB0003 rev.0 - 01/2007
confi guration
C
shows the above message and no alarm message is shown. shows the above message and no alarm message is shown.
) to the corresponding Control PCB
B
PCB
Seven Segment nº1
it is necessary to connect an operation
C
. It means that in case of a CHILLER Electric Box
C
and PCB and PCB
A A A
)
C2
A
Seven Segment nº2
SW4
SW3
) to establish the right
B