Snorkel UL40 - General Troubleshooting Procedure

Page 4 - 2 UL25/UL32/UL40
INTRODUCTION
Table 4-1 provides a logical sequence of tests that are designed to isolate problems with the Snorkel
lift. This table includes a list of probable causes and remedies.
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W A R N I N G
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When troubleshooting, ensure that the work platform is resting on a rm, level
surface.
When performing any service which requires the platform to be raised, ensure that
all four outriggers are properly installed. Unplug the machine or disconnect the bat-
tery when replacing or testing the continuity of any electrical component.
GENERAL PROCEDURE
Troubleshooting should be carried out in two steps. First, thoroughly study both hydraulic and elec-
trical schematics to determine possible causes. Loose terminal connections and short circuits are
always a potential cause when troubleshooting. Secondly, check suspect components electrically,
hydraulically and mechanically to determine if they are at fault. Refer to the section “SCHEMATICS”
for further information to be used together with information from Table 4-1.
ISSUE PROBABLE CAUSE REMEDY
Lift function inoperable, electric
motor does not start.
1. Extension cord too long or
insufcient capacity.
Use minimum 1.5 mm
2
(12 ga.)
cord of 16m (50 feet) or less in
length.
2. Not plugged in or faulty con-
nection (AC only)
Check that all AC plugs and
cords are used.
3. No power at wall outlet (AC
only)
Check power output at wall
outlet.
4. Faulty battery charger (DC
only)
Check the voltage output of the
battery charger. If less than 12
V DC, repair or replace
5. Faulty battery (BAT) After completely charging the
battery, test the battery.
Replace if faulty.
6. Key switch (S2), Emergen-
cy stop switch (S1, S3) or
push button switch (S4, S5)
failed to open.
With the switch in the “on”
position, check for continuity
across the contacts. If none,
replace.
7. Outrigger interlock switch
(S7, S8, S9 &S10)
Make sure all four outrigggers
are in rm contact with the
ground. Check continuity of
interlock switches.
8. Open circuit in cable to mo-
tor control box.
Test for continuity through cable
assembly and repair or replace.
9. Faulty electric motor (MI) While operating the lift function,
check the voltage to the electric
motor. If voltage is present (12
V DC or 120/240 V AC),
replace the motor. In case of
low AC voltage, refer to #1.
Lift turns on and off repeatedly. 1. Low line voltage or battery
charge.
Use minimum 11.5 mm
2
(12
ga.) cord of 16 m (50 feet) or
less in length.
TROUBLESHOOTING