JLG 20VP (3120728) Service Manual User Manual
Page 63
SECTION 3 - TROUBLESHOOTING
3120728
– JLG Lift –
3-3
Table 3-1. MC-1 WARNING CODES
(Indicated by 3 beeps, then slow flashing LED’s)
WARNING
CODE
LED’S
FLASHING
PROBABLE CAUSE
REMEDY
0
10
Enter Code - Security Code has been activated and
must be entered before operation
Enter Code or deactivate using MC-1 configuration
software.
1
8
Charger Connected
Unplug Charger
3
2
Brake Status Switch Open - Parking brake manually
released
Reset Parking Brake
3
2
Brake manual release lever obstructed (located at
drive motor brake)
Clear obstruction and reset lever
3
2
Defective parking brake status switch (located at
drive motor brake)
Replace Switch
3
2
Defective pin 11 at X105 (BRN wire) connection or
improper wiring
Properly attach wires or pin
3
2
Improper wiring at parking brake status switch
Properly attach wires
3
2
Improper wiring from parking brake status switch to
ground
Properly attach wires
4
5
Configuration Lost - Drive Characteristic has
changed
Reprogram using MC-1 software
5
6
Current Measurement faulty - Drive characteristic
may have changed
Cycle on-off and reprogram if necessary
6
7
High Temperature in controller
Reduce power
7
7
Motor Stalled
Check drive wheels and motors
9
1
Battery Low ( < 18v) and power reduced
Charge Batteries
12
9
Speed Control Potentiometer defective
Replace Joystick
13
4
Drive Cutout Input Open - PHP bar must be down to
drive while elevated
Lower PHP
13
4
PHP bar is down, but drive is disabled - Defective wir-
ing at D-connector
Properly attach wire (RED/BLU) or pin 12 of X105
connector
13
4
PHP bar is down, but drive is disabled - Defective
ground wiring
Properly attach wires
14
3
PHP bar is down, but drive is disabled - Defective
switch
Replace switch
14
3
Tilt Switch open - Slope greater than 2 degrees
Lower Platform and move to level ground
14
3
No Tilt Switch - open circuit at Pin 2 of X101 (WHT
wire)
Properly attach pin or wire connections
14
3
No Tilt Switch - open circuit to ground
Check ground wire connections (BLK1 wire)
25
----
Joystick E. Stop Counter
Controller Log Only
26
----
Configuration Access Counter
Controller Log Only