JLG 800A_AJ ANSI Service Manual User Manual

Page 379

SECTION 6 - JLG CONTROL SYSTEM (S/N 0300065534 TO PRESENT)

3120740

– JLG Lift –

6-49

2/5

Flash code 2/5 indicates that a function is prevented due to a cutout.

BOOM PREVENTED – DRIVE
SELECTED

A boom function is selected while a drive function is selected and drive cutout is config-
ured to prevent simultaneous drive & boom operation.

DRIVE PREVENTED – ABOVE ELE-
VATION

Drive is selected while above elevation and drive cutout is configured to prevent drive.

DRIVE PREVENTED – BOOM
SELECTED

Drive is selected while a boom function is selected and drive cutout is configured to pre-
vent simultaneous drive & boom operation.

DRIVE PREVENTED – TILTED &
ABOVE ELEVATION

Drive is selected while tilted and above elevation and tilt is configured to cutout drive.

MODEL CHANGED – HYDRAULICS
SUSPENDED – CYCLE EMS

User changed the model number using the analyzer. User must cycle power before the
hydraulics system will be active again.

UMS SENSOR BACKWARD LIMIT
REACHED

The UMS to turntable angle is a value greater than 2.5

UMS SENSOR FORWARD LIMIT
REACHED

The UMS to turntable angle is a value less than –4.0

AUTO DETECTION INPUT LOW

UMS detects a valid ground module software version but digital input 2 is not tied high

2/7

Flash code 2/7 indicates that the accelerator input is faulty.
NOT REQUIRED

2/8

Flash code 2/8 indicates a problem with a hydraulic filter. Not reported during 2 second power-up.

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 a driver problem. All driver faults are detected in a similar manner. Open circuit faults are
detected when the analog feedback reads too high and the output is commanded off. Short to ground is detected when the
analog feedback reads low and the output is commanded on. Short to battery is detected when the analog feedback reads
Vbat and the output is commanded off. Not reported during 2 second power-up.

ALTERNATOR/ECM POWER SHORT
TO GROUND
HOUR METER SHORT TO GROUND
HOUR METER SHORT TO BATTERY
HORN SHORT TO GROUND
HORN OPEN CIRCUIT
HORN SHORT TO BATTERY
AUX POWER SHORT TO GROUND
AUX POWER OPEN CIRCUIT
AUX POWER SHORT TO BATTERY
GLOW PLUG SHORT TO GROUND
GLOW PLUG OPEN CIRCUIT
GLOW PLUG SHORT TO BATTERY
LP LOCK SHORT TO GROUND

Table 6-8. Help Fault Codes, Displayed Faults, and Descriptions - S/N 0300066931 to Present

Fault Flash

Code

Communicated (Displayed on

Analyzer) Fault

Description

Priority