JLG 2658E3 Service Manual User Manual
Page 44
SECTION 2 - PROCEDURES
2-32
– JLG Lift –
3120878
3-3 - Indicates that a contactor coil is short-circuit
SHORT-CIRCUIT LINE CONTACTOR COIL - The line contactor was not energized
when required, due to coil over current protection.
VALVE OR LINE CONTACTOR ENERGIZED - CHECK WIRING - The drive circuit to the
line contactor or a valve is active when no driver circuit is turned on (this could be due to a
wiring error to the valves or line contactor).
4-2 - indicates that the controller is over temperature
CONTROLLER TO HOT - PLEASE WAIT - The controller heat sink temperature
reached 75 degrees. The controller is shut down until it cools to below 70 degrees.
4-4 - Indicates problems with the battery supply
BATTERY TOO LOW - SYSTEM SHUT DOWN - Battery voltage is below 17V. EMS
recycle required.
BATTERY TOO HIGH - SYSTEM SHUT DOWN - Battery voltage is above 30 V. EMS
recycle required.
7-7 - Indicates problems with a motor
CAPACITOR BANK FAULT - CHECK MOTOR WIRING - The capacitor bank is not
charging. This is probably due to a power wiring error causing illegal current drain; it
could also be due to a very low battery supply.
POINT A LOW - CHECK POWER CIRCUITS - Pump point A is low when the MOSFETs
are off. This is probably due to power wiring error.
PUMP MOTOR OPEN-CIRCUIT - CHECK MOTOR & WIRING - Pump point A is col-
lapsing when the pump MOSFETs are pulsed. This is probably due to an open circuit
pump motor or a power wiring error.
PUMP MOTOR STALLED - CHECK MOTOR & WIRING - The pump MOSFET protec-
tion circuit is active. This is due to massive current drain and could be a stalled pump
motor or power wiring error.
9-9 - Indicates problems with the controller
CONTROLLER FAILURE: HWFS TEST STALLED - The hardware fail safe tests did not
complete, but no reason can be determined.
CONTROLLER FAILURE: HWFS TEST STALLED 15 - The hardware fail safe tests
failed because the contactor drive fail safe did not trip within the allowed test time.
NOTE: Anytime a reading of a 15- code aooears the controller must
be replaced.
Table 2-6. JLG SMART System™ Flash Codes & Help Messages
Code
Description