SECTION 6 - JLG CONTROL SYSTEM
6-56
– JLG Lift –
3121659
FLOW CONTROL VALVE – CUR-
RENT FEEDBACK READING TOO
LOW
33415 The Engine State = ENGINE RUNNING;
The UGM commanded current > 250mA;
The difference between the commanded current and the
measured feedback current > [the larger of (125mA) or (15%
of the commanded function Max)] for longer than 1 second
The UGM shall suspend Flow
Control and revert to Open
Current loop control for Flow
Control;
The UGM shall limit Tele-
scope, Jib Lift Up; Jib Lift
Down (400S, 450AJ), Plat-
form Rotate and Platform
Level to Creep speed after
controls initialized
Power Cycled
TOWER LIFT – CURRENT FEED-
BACK READING LOST
33416 Measured feedback current < 225mA while PWM output >
40% for a period of 100ms.
The UGM shall suspend Tower
Lift Up and Down command
and revert to Open Loop Cur-
rent control for Tower Lift;
The UGM shall limit Tower Lift
Up and Down to Creep speed
after controls initialized
Power Cycled
LIFT – CURRENT FEEDBACK
READING LOST
33417 Measured feedback current < 225mA while PWM output >
40% for a period of 100ms.
The UGM shall suspend Lift
Up and Down command and
revert to Open Loop Current
control for Lift;
The UGM shall limit Lift Up
and Down to Creep speed
after controls initialized
Power Cycled
SWING – CURRENT FEEDBACK
READING LOST
33418 Measured feedback current < 225mA while PWM output >
40% for a period of 100ms.
The UGM shall suspend Swing
Left and Right command and
revert to Open Loop Current
control for Swing;
The UGM shall limit Swing
Left and Right to Creep speed
after controls initialized
Power Cycled
FLOW CONTROL VALVE – CUR-
RENT FEEDBACK READING LOST
33419 Measured feedback current < 225mA while PWM output >
40% for a period of 100ms.
The UGM shall suspend Flow
Control and revert to Open
Current loop control for Flow
Control;
The UGM shall limit Telescope
In and Out, Jib Lift Up and
Down (400S, 450AJ), Plat-
form Rotate Right and Left
and Platform Level Up and
Down to Creep speed after
controls initialized
Power Cycled
TOWER LIFT VALVES – SHORT
TO BATTERY
33425 The UGM detects a short to battery at either the Tower Lift Up
or Tower Lift Down valve.
The UGM shall prohibit Tower
Lift Up and Down;
The UGM shall open the
Tower Lift Current Feedback
low side FET
Power Cycled
AUXILIARY LIFT DOWN VALVE -
SHORT TO GROUND
33537 The UGM detects a short to ground at this output
The UGM shall prohibit Aux
Lift Down
Power Cycled
Table 6-5. Diagnostic Trouble Code Chart
Help Message
DTC
Fault Condition/Trigger
(For configurable items, fault applies only if
configured. All listed conditions to be met unless
stated otherwise)
Required Control
Response or State
Assignment
Conditions Required for Movement
and/or to Clear Fault
Summary of Contents for JLG 450AJ
Page 2: ......
Page 32: ...SECTION 1 SPECIFICATIONS 1 18 JLG Lift 3121659 NOTES...
Page 80: ...SECTION 4 BOOM PLATFORM 4 2 JLG Lift 3121659 Figure 4 1 Boom Assembly...
Page 81: ...SECTION 4 BOOM PLATFORM 3121659 JLG Lift 4 3 Figure 4 2 Main Boom Assembly Sheet 1 of 2...
Page 82: ...SECTION 4 BOOM PLATFORM 4 4 JLG Lift 3121659 Figure 4 3 Main Boom Assembly Sheet 2 of 2...
Page 83: ...SECTION 4 BOOM PLATFORM 3121659 JLG Lift 4 5 Figure 4 4 Upper Boom Assembly...
Page 84: ...SECTION 4 BOOM PLATFORM 4 6 JLG Lift 3121659 Figure 4 5 Jib Assembly...
Page 118: ...SECTION 4 BOOM PLATFORM 4 40 JLG Lift 3121659 NOTES...
Page 156: ...SECTION 5 BASIC HYDRAULIC INFORMATION HYDRAULIC SCHEMATICS 5 38 JLG Lift 3121659 NOTES...
Page 164: ...SECTION 6 JLG CONTROL SYSTEM 6 8 JLG Lift 3121659 Figure 6 2 Tilt Sensor Location...
Page 169: ...SECTION 6 JLG CONTROL SYSTEM 3121659 JLG Lift 6 13 Figure 6 7 Analyzer Connecting Points...
Page 181: ...SECTION 6 JLG CONTROL SYSTEM 3121659 JLG Lift 6 25 Figure 6 19 Platform Module Sheet 1 of 2...
Page 182: ...SECTION 6 JLG CONTROL SYSTEM 6 26 JLG Lift 3121659 Figure 6 20 Platform Module Sheet 2 of 2...
Page 224: ...SECTION 6 JLG CONTROL SYSTEM 6 68 JLG Lift 3121659 NOTES...
Page 340: ...SECTION 7 BASIC ELECTRICAL INFORMATION ELECTRICAL SCHEMATICS 7 116 JLG Lift 3121659 NOTES...
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