SkyRider 15
4-18
Table 4-3. Troubleshooting Chart (Continued)
Problem Cause Correction
10. Pothole guard does not rise
when lift platform is lowered
via upper control box.
a. 10 Amp Motors fuse burned out on
main controller board.
b. Internal steering actuator fuse.
c. Actuator or actuator wiring faulty.
d. Pothole guard linkage failed.
e. Main controller faulty.
a. Replace 10 Amp Motors fuse.
b. Replace steering actuator fuse.
c. Check actuator wiring for operating
voltage when platform reaches lower
travel limit. If voltage is present, re-
place faulty actuator. If voltage is not
present, check actuator wiring for
continuity; repair wire breaks.
d. Check pothole guard linkage for
damage; replace damaged parts.
e. Contact Workforce for assistance.
11. When BATTERY ON/OFF
switch is turned ON, hydrau-
lic pump starts up.
a. Motor start relay failure; relay con-
tacts fused shut.
a. Replace motor start relay.
Troubleshooting Aids
See Table 4-4 for interpreting LED indicators located on the main controller board
shown in Figure 4-13. Hydraulic and PC logic diagrams are shown in Figures 4-14 and
4-15. An electrical wiring diagram is shown in Figure 4-16.
TECHNOLOGIES CORPPORATION
P/N: EASI-WFC-02
MAIN CONTROLLER
POS 24V
NEG 24V
F2 10AMP
F1 2AMP
Pothole Up
Pothole Down
Steer Left
Steer Right
Down Valve
Up Valve
Horn ON
Hour Meter
Pump ON
Upper Controls
Lower Raise
Lower Down
Mast Down
TILT
A0/CLK
A1/DATA
EASI-TXD
EASI-RXD
EASI-0
GND
TXD
RXD
CAN L
CAN H
CAN GND
CAN P5V
Mast Switch
Lower Down
Lower Up
IO Power 1
Upper Controls
IN-4
IN-5
IN-6
IN-7
IO Power 2
EASI-24
Pothole
Motor
Steering
Motor
Down
Valve
Up
Valve
Horn
Hour
Meter
Pump
Figure 4-13. Main Controller Board
