JLG 800A_AJ Service Manual User Manual
Page 376
SECTION 6 - JLG CONTROL SYSTEM (S/N 0300065534 TO PRESENT)
6-44
– JLG Lift –
3120858
2/8
Flash code 2/8 indicates that the hydraulic filter is being bypassed.
5
RETURN FILTER BYPASSED
Hydraulic return filter clogged
CHARGE PUMP FILTER
BYPASSED
Charge pump filter clogged
3/1
Flash code 3/1 indicates that a contactor did not close when energized.
NOT REQUIRED
3/2
Flash code 3/2 indicates that a contactor did not open when energized.
NOT REQUIRED
3/3
Flash code 3/3 indicates that a driver is short-circuit.
6
ADD DRIVER FAULTS
3/5
Flash code 3/5 indicates a brake pressure problem.
NOT REQUIRED
7
4/2
Flash code 4/2 indicates that the engine is over temperature. NOT REQUIRED
8
4/3
Flash code 4/3 indicates problems with the engine
9
ENGINE TEMP GREATER THAN
130C (266° F)
AIR FILTER BYPASSED
Air filter clogged
NO ALTERNATOR OUTPUT
The measured battery voltage is less than 12.5 VDC
OIL PRESSURE LESS THAN 0.5
BAR (8PSI)
4/4
Flash code 4/4 indicates problems with the battery supply.
7
BATTERY LOW
Battery voltage is below 11V. This is a warning - the controller does
not shut down.
BATTERY TOO HIGH - SYSTEM
SHUT DOWN
Battery voltage is above 18V. EMS recycle required.
BATTERY TOO LOW - SYSTEM
SHUT DOWN
Battery voltage is below 6V. EMS recycle required.
SYSTEM VOLTS LOW
Battery voltage is below 9V.
SYSTEM VOLTS HIGH
Battery voltage is above 16V.
5/5
Flash code 5/5 indicates problems with vehicle engine RPM or the encoder.
8
SPEED SENSOR READING
INVALID SPEED
Speed sensor is indicating an impossible number of pulses. This is
probably due to a faulty speed sensor.
SPEED INPUT LOST
This indicates that the control system has determined that the diesel
engine speed input to the system has been lost. This is probably due
to wiring problems at the ground module or a faulty speed sensor.
ENGINE SPEED DOES NOT
MATCH COMMAND
This indicates that the control system has determine that the diesel
engine governor has stuck. This is probably due to electrical or
mechanical problems with the governor.
Table 6-7. Help Fault Codes, Displayed Faults, and Descriptions - Prior to S/N 0300066931