Snorkel A38E, Руководство по эксплуатации и ремонту

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Troubleshooting
Section
5-4 A38E Work Platform
5.1
P
ROBLEM
C
AUSE
A
CTION
All functions inoperable.
Electric motor does not start.
1. Blown main fuse Check the 300A fuse and replace if necessary
2. Faulty Battery Charger Connect charger to batteries and check the output voltage. If less than
48v, repair or replace.
Check input voltage to charger. Check the internal charger protection
fuse.
3. Faulty Battery Charge batteries overnight. Check individual cell voltage. Replace as
necessary.
4. Loose or broken battery leads Check resistance and continuity of each individual lead. Replace as
required.
5. Emergency Stop buttons
contacts failed
Check resistance and continuity of each individual lead. Replace as
required.
7. Loose Upper Control Box
Terminal
Unscrew connector, align locating tabs and reconnect
8. Battery Disconnect plug loose Check and reconnect. Check the internal steel points for pitting or
damage
Electric motor starts but all
functions are inoperable
1. Low hydraulic oil Check and top up using ISO VG 46 hydraulic oil.
2. Faulty hydraulic pump Insert a pressure gauge in the G1 port of the valve block. Operate a
function to the limit of stroke. Check that relief valve pressure
develops. Repair or replace.
3. Faulty controller Check the 10mm cable terminals for tightness.
Electric motor continues to
run when action has ceased
1. Line contactor malfunction Check the contact faces. Fusing or arcing due to contamination
destroys the contacts. Replace the unit.
Pl.atform elevates very
slowly or not at all
1. Leaking emergency lowering
valves
Check the operating levers and cables.
Check closure of the control knob at the base of the control valve
block.
Remove and replace the cylinder-mounted valves as necessary.
2. Faulty lift valve solenoids Test the voltage to the mast and jib solenoids. Swap around solenoids
to isolate the problem. Solenoids are not serviceable.
3. Platform overloaded Remove excessive load.
Check the pressure setting of the hydraulic ‘lift limit’ relief valve (CT11)
on the block. This may only be reset at 215 kg payload in the platform.
l e v e l y r e tt a B 4. Low Check the battery cell voltages after recharging. Total battery pack
voltage should exceed 18v.
Charge the batteries or replace faulty battery unit.
Platform drifts down
uncontrollably
1. Leaking emergency lowering /
hose burst valves
Check the operating levers and cables.
Check contamination within the valve.
Check closure of the control knob (CT14) at the base of the control
valve block.
Remove and replace the cylinder-mounted valves as necessary.
2. Cylinder piston seal internal
leakage
Switch off all power functions. Disconnect the hose from the annular
side of the cylinder and check for small oil flow. Oil flow indicates a
faulty cylinder piston seal. Remove and repair the cylinder.
3. Platform is overloaded Remove excessive weight.
The Safe Working Load is 215 kg for A38
5.1 G
ENERAL
T
ROUBLESHOOTING