Fronius TransSynergic 5000 - Service Code Err 50

26
Service code Err
50
Start
Does service code Err
50 appear directly
after switching on,
although the primary
power module is not
operating?
Yes
Imbalance in interme-
diate circuit > 35V?
+5V available on UST
from X6/26 - X7/8?
No
Yes
Change BPS
Yes
Does Err 50 disappear
after a short while?
Yes
No
Change intermediate
circuit electrolytic
capacitors
Switch off power
source; unplug X2
from NT 60; switch on
power source
Err 50?
Change NT 60
No
Yes
Switch off power
source; discharge
intermediate circuit
electrolytic capacitors;
unplug X1 from NT 24;
switch on power source
Imbalance in interme-
diate circuit > 35V?
No
Change NT 24
A
Select „Rod electro-
de“ mode
On the BPS, the
brightness of the
control LEDs remains
unchanged when the
BPS is accessed
Change UST
No
Yes
No
Change UST
Yes