HAKO 7580.02, Service Booklet

Page: 76 / 116

Foil 76
9.2.3 ZAPI Controller
17) DRIVER 2 KO
If voltage at the NT2 terminal (A4) does not correspond to the desired value, an alarm is output and
the system switches off.
Possible causes:
a) Wire at the NT2 terminal (A4) broken or coil of the direction contactor
for forward ride is defective.
b) Internal driver MOSFET short-circuited (replace controller!)
18) DRIVER 2 SIC KO
If current load at the contactor driver which activates the NT2 output (A4) is excessive, an alarm is
output and the system switches off.
Possible causes :
a) Short-circuit of the wire at NT2 terminal (A4) to +Batt
b) Coil of the connected contactor short-circuited or current consumption > 5A