55
SAFIR 5L
OPERATION AND ATTENDANCE MANUAL
PG 01-31
List of Algorithms for APU Function Monitoring and Troubleshooting
After the switch is set to position „RUN“ and is pressed
the „START“ button, APU does not start turning
Perform the checks error messages the EC via PC, RS232
interface on a COM port and software "SAFIR Monitor"
Error messages the EC -
Control electronic
Faulty operation of the electronic circuit the Control Box
APU rotor
revolves freely
Replace
ES,APU
Board network
voltage in order
Check the
feeding
Circuit - breakers and feding
of starting circuits ON
Turn feeding
ON
Ignition systém and
fuel pump in operation
TEST
Voltage on the terminals
of electro-starter
Replace ES
Check the
cables
TEST
Control box fed
TEST
Check feeding of
H breaker
1.
Ceck the cables
2.
Replace the breaker
Replace EC
NO
NO
NO
NO YES
YES
YES
YES
Check the cables
NO
NO
YES
YES
YES
NO
