Terex AL4L, Service Manual

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REV B
August 2016
5 - 4 AL4L • AL5L Part No. 229171
Section 5 • Troubleshooting
Engine runs but battery voltage
is low Faulty alternator Inspect and repair as needed
Engine runs but lights will not
operate Circuit breaker has tripped Reset circuit breaker
Loose wiring connections Inspect and repair as needed
Faulty generator Inspect and repair as needed
Unusual noise from the generator Generator has a faulty bearing or
faulty fan blade Inspect and repair as needed
Lamp light output low Dirty light fi xture Clean light fi xture
TROUBLESHOOTING
Possible Cause Solution Problem
Generator produces full voltage
at no load OR voltage drops at
full load Loose or broken lead wires Inspect lead wires and conections
for broken wires and loose
connections
Rotor open or shorted Measure resistance between
leads
Stator grounded or shorted Contact the Genie Service Dept.
Generator voltage too high High engine speed Adjust to 1850 rpm (no load)
Generator produces no voltage at
no load or at full load Faulty surge suppressor
Disconnect suppressor from
circuit. If there is an obvious
increase in voltage, replace the
suppressor.
Faulty capacitor Replace
Loss of residual magnatism
Flash the rotor
Open winding Replace the generator
Light heads are fl ashing on-off Batteries low Charge batteries
Single LED burned out End of life Continue to use until light head
failure OR replace
Light head will not illuminate End of life Replace
Short in power supply cable Inspect and repair as needed
Short in power supply cable Inspect and repair as needed
Power supply cable connector
faulty OR poor connection Inspect and repair as needed
Power supply cable connector
faulty Inspect and repair as needed