JLG 450A_AJ Series II Service Manual - Manual (Page 409)

SECTION 6 - JLG CONTROL SYSTEM
3121180 – JLG Lift – 6-73
8/4 Flash code 8/4 indicates problems with the envelope system. Only occur
on machines with envelope control. 10
BOOM ANGLE SENSOR DISAGREE-
MENT The boom angle sensors are reporting angles that differ too greatly. An EMS
cycle is required.
BOOM LENGTH SWITCH FAILED The boom length switch inputs are reporting the same state. An EMS cycle is
required.
BOOM LENGTH SWITCH/SENSOR
DISAGREEMENT The boom length switch and sensor differ in their reports of extended or
retracted. An EMS cycle is required.
BOOM LENGTH SENSOR NOT
DETECTING LENGTH CHANGE The boom length sensor has not detected a change in length while the user is
commanding telescope. An EMS cycle is required.
BOOM LENGTH SENSOR OUT OF
RANGE HIGH Indicates that the voltage for the boom length sensor is above the expected
range.
BOOM LENGTH SENSOR OUT OF
RANGE LOW Indicates that the voltage for the boom length sensor is below the expected
range.
BOOM LENGTH SENSOR VALUE OUT
OF RANGE HIGH Indicates the length reported for the boom length sensor is above the expected
range. An EMS cycle is required.
BOOM LENGTH SENSOR VALUE OUT
OF RANGE LOW Indicates the length reported for the boom length sensor is below the expected
range. An EMS cycle is required.
BOOM ANGLE SENSOR #1 COMMU-
NICATIONS FAULT Boom angle sensor #1 lost communications with the BLAM. An EMS cycle is
required.
BOOM ANGLE SENSOR #2 COMMU-
NICATIONS FAULT Boom angle sensor #2 lost communications with the BLAM. An EMS cycle is
required.
ANGLE SENSOR #1 INVALID ANGLE An EMS cycle is required.
ANGLE SENSOR #2 INVALID ANGLE An EMS cycle is required.
WRONG TELE RESPONSE The boom telescope is contrary to the user command
WRONG LIFT RESPONSE The boom lift is contrary to the user command
TOWER ANGLE SENSOR DISAGREE-
MENT The tower angle sensors are reporting angles that differ too greatly. An EMS
cycle is required.
TOWER LENGTH SENSOR DIS-
AGREEMENT The tower length sensors are reporting angles that differ too greatly. An EMS
cycle is required.
MAIN ANGLE SENSOR DISAGREE-
MENT The main boom angle sensors are reporting angles that differ too greatly. An
EMS cycle is required.
BOOM LENGTH SENSOR #1 OUT OF
RANGE HIGH Reported from the BLAM, indicates tower length sensor one value is out of
range high.
BOOM LENGTH SENSOR #1 OUT OF
RANGE LOW Reported from the BLAM, indicates tower length sensor one value is out of
range low.
BOOM LENGTH SENSOR #2 OUT OF
RANGE HIGH Reported from the BLAM, indicates tower length sensor two value is out of
range high.
BOOM LENGTH SENSOR #2 OUT OF
RANGE LOW Reported from the BLAM, indicates tower length sensor two value is out of
range low.
TWR LENGTH SENSOR NOT
DETECTING LENGTH CHANGE Tower tele is being commanded and the length sensors are not changing
value.
TWR LENGTH MOVEMENT WITHOUT
CMD Tower length is changing without a tower tele command
TWR LENGTH SENSOR ONE VALUE
OUT OF RANGE HIGH This fault is reported by the Ground module when the length sensor value is
outside the constant data limit
Table 6-8. Help Fault Codes, Displayed Faults, and Descriptions - S/N 0300066949 & S/N 1300000001 to Present
Fault Flash
Code
Communicated (Displayed on
Analyzer) Fault
Description Priority