JLG X390AJ-X14J Supplement Manual page 68

SECTION 3 - TROUBLESHOOTING AND FAULT CODES
Error Code
74
74
75
76
76
77
77
78
79
80
82
86
86
89
3-6
Table 3-3. Inverter Fault Codes
Error Condition
Driver shorted
Aux Batt short
Driver shorted
Coil shorted
Key off shorted
Contactor open
Tiller Error
VACC not OK
Incorrect start
Emergency MDI CAN code alarm Emergency MDI code alarm
Encoder Error
Pedal wire KO
Pos EB shorted
Power MOS shorted
Error Description
Anomaly to the relay supply.
Coil on the AUX output is not
correctly connected.
Anomaly to the relay supply.
Anomaly detected in the relay
coil.
Key-off signal is low at key-on.
Main contactor is not closed even
if fed by the inverter.
Input mismatch between hard &
soft switch input and tiller input.
-
Starting procedure not correct.
Problem on the encoder.
-
Output not correct.
Short circuit in the power
mosfets.
Corrective Action
Control relay supply. Usually it is
a temporary anomaly due to a
working condition. In case the
anomaly persists replace the
inverter.
Check the connections with the
main relay, check the inverter
supply; replace the inverter.
Control relay supply. Usually it is
a temporary anomaly due to a
working condition. In case the
anomaly remains replace the
inverter.
Control the integrity of relay
support.
Check the 12-volt battery and its
connections, check the DC-DC
and its connections, check the
inverter connections; replace the
inverter.
Check the main contactor.
Check the CAN BUS Line
connections.
Usually it is a temporary anomaly
due to a working condition. In
case the anomaly persists replace
the inverter.
Control the electric connections.
Usually it is a temporary anomaly
due to a working condition. In
case the anomaly persists replace
the inverter.
Check the inverter feeds.
Check the connections from the
inverter to the electric motor;
replace the inverter
Usually it is a temporary anomaly
due to a working condition. In
case the anomaly persists replace
the inverter.
Check the inverter connections;
replace the inverter.
Replace the inverter.
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