JLG X550AJ Operator Manual - Manual (Page 127)

SECTION 6 - GENERAL SPECIFICATIONS AND OPERATOR MAINTENANCE
3128791 – JLG Lift – 6-25
53
STBY I high
Cause – Internal fault detected in the inverter.
Solution – This is generally a temporary problem due to certain-
working conditions. If problem persists, replace inverter.
60
Capacitor Charge
Cause – Internal fault in the inverter.
Solution – Check connections and motor phases.
61
High temperature
Cause – High temperature inside the inverter.
Solution – Improve cooling to inverter. If fault persists, contact
JLG after-sales service.
65
Motor temperature
Cause – High motor temperature.
Solution – Temporarily stop machine to allow motor to cool down.
67
Can Bus KO
Cause – Inverter doesnft receive any information from Can Bus
line.
Solution – Check connections using multifunction tester.
70
Encoder Error
Cause – Problem detected with encoder (=motor speed sensor).
Solution – Check speed sensor connection. Anomaly may also
have been caused by fault with bearing.
Table 6-10. Inverter Fault Codes
CODE DESCRIPTION
73
Thermis sensor KO
Cause – Signal from temperature sensor greater than 4.95 Volts or
less than 0.1 Volt.
Solution – This is generally a temporary problem due to certain
working conditions. If problem persists, replace inverter.
74
Driver shorted
Cause – Relay power supply fault.
Solution – Check relay power supply. This is generally a temporary
problem due to certain working conditions. If problem persists,
replace inverter.
75
Driver shorted
Cause – Relay power supply fault.
Solution – Check relay power supply. This is generally a temporary
problem due to certain working conditions. If problem persists,
replace inverter.
76
Coil shorted
Cause – Problem detected with relay coil.
Solution – Make sure relay coil is intact.
78
VACC not OK
Cause –
Solution – This is generally a temporary problem due to certain
working conditions. If problem persists, replace inverter.
Table 6-10. Inverter Fault Codes
CODE DESCRIPTION