SECTION 6 - GENERAL SPECIFICATIONS AND OPERATOR MAINTENANCE
3121773
– JLG Lift –
6-23
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 doesn’t 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 6-12. 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 prob-
lem 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 prob-
lem 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 6-12. Inverter Fault Codes
CODE
DESCRIPTION
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