Snorkel A38E Parts And Service Manual page 138

Section
5.1
5.1 G
ENERAL
P
ROBLEM
All functions inoperable.
Electric motor does not start.
Electric motor starts but all
functions are inoperable
Electric motor continues to
run when action has ceased
Pl.atform elevates very
slowly or not at all
Platform drifts down
uncontrollably
5-4
Troubleshooting
T
ROUBLESHOOTING
C
AUSE
1. Blown main fuse
2. Faulty Battery Charger
3. Faulty Battery
4. Loose or broken battery leads Check resistance and continuity of each individual lead. Replace as
5. Emergency Stop buttons
contacts failed
7. Loose Upper Control Box
Terminal
8. Battery Disconnect plug loose Check and reconnect. Check the internal steel points for pitting or
1. Low hydraulic oil
2. Faulty hydraulic pump
3. Faulty controller
1. Line contactor malfunction
1. Leaking emergency lowering
valves
2. Faulty lift valve solenoids
3. Platform overloaded
4. Low B t a e t y r e l v l e
1. Leaking emergency lowering /
hose burst valves
2. Cylinder piston seal internal
leakage
3. Platform is overloaded
Check the 300A fuse and replace if necessary
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.
Charge batteries overnight. Check individual cell voltage. Replace as
necessary.
required.
Check resistance and continuity of each individual lead. Replace as
required.
Unscrew connector, align locating tabs and reconnect
damage
Check and top up using ISO VG 46 hydraulic oil.
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.
Check the 10mm cable terminals for tightness.
Check the contact faces. Fusing or arcing due to contamination
destroys the contacts. Replace the unit.
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.
Test the voltage to the mast and jib solenoids. Swap around solenoids
to isolate the problem. Solenoids are not serviceable.
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.
Check the battery cell voltages after recharging. Total battery pack
voltage should exceed 18v.
Charge the batteries or replace faulty battery unit.
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.
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.
Remove excessive weight.
The Safe Working Load is 215 kg for A38
A
CTION
A38E Work Platform