58
SAFIR 5L
OPERATION AND ATTENDANCE MANUAL
PG 01-31
APU runs for 35 seconds only
Error messages the EC-
speed signaling failure-
Little or no signal level of APU speed.
Voltage of board network is correct
Yes
YES
NO
Check feeding voltage
APU started accelerating at about 20
th
second
APU Acceleration
delayed
APU no acceleration
at all
Idle run signaling of APU
89% has been lit
Replace EC
Check current at
Servovalve of FC
Check if APU
speed is about 80%
Check if low oil pressure
is lit in 35
th
second
Replace EC
Clean FF
Check APU
Draining
Replace BFS
and/or FP
Check feeding
Servovalve circuit of
FC
Check current
at Acceleration
Limiter
Replace EC
Check if
OF is
clean
Replace EC
and/or
Replace
complete
OF
Replace EC
-Clean FF
-Check APU
-Draining
-Replace BFS
and/or FP
Clean FF
Replace OP
And/or BFS
Check feeding
of EV2
Clean OP
Replace OP
and/or BFS
Error messages the EC-
insufficient oil pressure-
After the start failure to reach or
during operation oil pressure drop below the set limit.
YES
YES
YES
YES
NO
NO
NO
NO
YES
YES
>80mA
≤
80mA
≤
80mA 107÷133mA
>200mA
NO YES
Perform the checks error messages the EC via PC, RS232
interface on a COM port and software "SAFIR Monitor"
