JLG X20JP - X600AJ Service Manual - Manual (Page 255)

SECTION 6 - JLG CONTROL SYSTEM
3121623 – JLG Lift – 6-39
Table 6-7. INVERTER Diagnostic trouble code chart
CODE MEANING
1 Wrong Config
Cause: Eeprom memory not configured
Solution: Contact JLG after sales dept.
8 Watch Dog
Cause: The inverter is unable to activate or turn off the electric motor
Solution: Control connections and continuity of the electric motor. If they are OK replace
the inverter
13 Eeprom KO
Cause: Hardware or Software problem in eeprom
Solution: Replace the inverter
16 Aux output KO
Cause: Electromechanical brake problem
Solution: Usually it is a temporary anomaly due to a particular working condition. In case
the anomaly persists replace the inverter.
17 Logic failure #3
Cause: Activates in case of high peak of current in the inverter.
Solution: Usually it is a temporary anomaly due to a particular working condition. In case
the anomaly persists replace the inverter.
18 Logic Failure #2
Cause: Fault in the inverter
Solution: Replace the inverter
19 Logic failure #1
Cause: An overvoltage or a sudden voltage drop occurred.
Solution: Usually it is a temporary anomaly due to a particular working condition. In
case the anomaly persists replace the inverter.
30 VMN low
Cause: Inverter supply voltage is lower than the batteries’ one, or the connection
with the positive terminal of the battery is not correct.
Solution: Control the connection with the positive terminal of the battery. If the anomaly
persists replace the inverter.
31 VMN High
Cause: One motor phase is not correctly connected or is broken.
Solution: Control motor phases. If the anomaly persists replace the inverter.
37 Contactor closed
Cause: The relay remains closed with power to the coil disconnected.
Solution: Control the relay
38 Contactor Open
Cause: The inverter feeds the relay’s coil but the contact does not close.
Solution: Control the relay and the power to the coil