SECTION II
TESTING AND TROUBLESHOOTING
Table 2-1. Troubleshooting Guide
Page 2-9Printed in U.S.A.
Problem Symptom Probable Cause Check Correction
Foot control does not work
-Continued
When foot switch on foot
control is pressed, nothing
happens (hand control
display should illuminate
when foot switch is
depressed) -Continued.
Foot control interface board
is malfunctioning.
Replace suspect foot
control interface board
with known working foot
control interface board.
Replace foot control interface
board. Refer to para 4.44.
10 amp fuse on main
controller board is blown.
Perform continuity check
on 10 amp fuse.
Replace 10 amp fuse. See
Figure 5-1 for fuse location.
Main controller board or foot
control interface board is
malfunctioning.
See Figure 5-1 for this
check. Check for 5.0
VDC across Test Points
P and W. If 5.0 VDC is
present, check for 5.0
VDC across Test Points
W and X within 10
seconds of pressing a
foot button on foot
control.
If 5.0 VDC is not present
across Test Points P and W,
the main controller board is
malfunctioning. If 5.0 VDC is
not present across Test Points
W and X during check, then
main controller board or foot
control interface board is
malfunctioning. Refer to para
4.31 or 4.44.
Wires or wire connections
between main controller
board, distribution board,
and hand control port are
broken, loose or dirty.
See Figure 5-1 for this
check. Perform a
continuity check on all
suspect wires or
connections.
Clean any dirty connections.
Tighten any loose
connections. Replace any
broken connectors or wires.
Error code E01 (Floor
Lock Status Switch Is Not
Responding) displays on
hand control.
Floor lock cylinders do not
extend or retract properly
and error code E01
appears on hand control.
Check valve(s) for main floor
lock cylinder(s) or outrigger
floor lock cylinder(s) are
stuck open, allowing floor
lock cylinders to retract after
extending.
Remove check valve(s)
and check for foreign
matter.
Remove and clean check
valve(s). Replace any
damaged pilot pistons or
check valves.
Foreign matter in main floor
lock or outrigger floor lock
valve spool.
Remove valve spool(s)
and check for foreign
matter. Flush out valve
spool manifold with oil.
Push on manual release pin of
valve spool. If still stuck,
remove valve spool(s) and
check for foreign matter.
Flush out valve spool manifold
with oil.
Outrigger pressure relief
valve is malfunctioning,
preventing outrigger
cylinders from extending
fully.
Replace suspect
pressure relief valve with
known working pressure
relief valve.
Replace outrigger pressure
relief valve and spring. Refer
to para 4.30.
Inside surfaces of main floor
lock cylinder(s) or outrigger
floor lock cylinder(s) are dirty
/ covered with foreign
matter, which prevents the
cylinder(s) from extending or
retracting fully.
Check for foreign matter
on inside surfaces of
floor lock cylinders.
Disassemble and clean floor
lock cylinder(s).
Floor lock cylinders extend
properly, but error code
E01 appears on hand
control.
Main floor lock status switch
remains tripped after main
floor locks have extended
(out of adjustment).
Check if status switch is
tripped.
If necessary, adjust main floor
lock status switch. Refer to
para 4.42.
Main floor lock status switch
is malfunctioning - stuck
open.
See Figure 5-1 for this
check. Perform
continuity check on
normally closed status
switch (switch untripped
= continuity).
If malfunctioning, replace main
floor lock status switch. Refer
to para 4.42.
© Schaerer Mayfield USA, Inc. 2004
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