SANY SY155U, Operation And Maintenance Manual

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MACHINE OPERATION
4-9 SY155U Excavator OMM
Electrical Components Check
NOTICE!
If fuses fail frequently, the wiring harness must be
inspected for broken or damaged wire insulation
or a component placing a high electrical load on
the system. Contact a SANY dealer for more
information. Failure to follow this notice may
result in damage to the machine.
• Regularly wash the top of the battery to prevent
the battery vents from plugging.
• Check the fuse panel for blown fuses, fuses of
incorrect capacity, open or short circuits, and
loose connections. Replace blown fuses and
fuses of incorrect amperage rating, and tighten
loose connections as necessary. See “Fuses” on
page 4-9.
• Make sure the battery cables and wires are clean
and in good condition when inspecting the
battery, starting motor, and alternator. See
“Check the Batteries” on page 5-36.
• Clean the area around the battery of combustible
materials.
For additional information about troubleshooting
faults in the electrical system, contact a SANY
dealer.
Check the following electrical components:
• Check monitor operation.
• Check for blown or loose fuses.
• Make sure the fuses have the proper rating for each
circuit.
• Make sure the battery terminal connectors are
clean, secure, and free of dirt and debris.
• Inspect the electrical wires and cables for worn or
damaged insulation.
• Make sure the vents on top of the batteries are free
of any dirt or debris.
• Check if the rear camera is operating (if equipped).
• Check for proper windshield wiper operation.
Lights and Warning Devices
With the key switch ON, check the following for proper
operation:
• Horn
• Work lights
• Radio
• Beacon light
• Cab ventilation fan
Fuses
NOTICE!
• If fuses frequently fail, there may be a short
circuit in the cables or component placing a high
electrical load on the circuit. Contact a SANY
dealer for electrical troubleshooting.
• A fuse should be replaced if it is blown,
corroded, or becomes loose in the fuse block.
• Before replacing a fuse, make sure the key
switch is in the OFF position and the battery
disconnect switch is in the OFF position. (See
“Battery Disconnect Switch” on page 3-15.)
• Always replace a fuse with one of the same
rating. Using a higher amperage fuse on a circuit
rated for a lower current can cause a fire or
damage the electrical circuit’s components in
case of a short or excessive power draw.
Check the Fuses
0003580
Figure 4-14
NOTE: Before replacing a fuse, make sure the key switch
is in the OFF position and the batteries are
disconnected.
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