Unusual Symptom Troubleshooting Guide; Unusual Symptom Troubleshooting Guide; Plugging Diode; Freewheel Diode - Taylor-Dunn ET-015-00 Operation, T Roubleshooting And Replacement Parts Manual

UNUSUAL SYMPTOM TROUBLESHOOTING GUIDE

This section is specific to the symptoms listed below. Each troubleshooting sequence assumes that
all listed symptoms are present. Do not use this section unless the vehicle is exhibiting has all listed
symptoms.
Ø
Runs slow in both directions plus high armature current in both directions.
NOTE: Field current will be very low.
Ø
Runs normal in one direction only plus runs slow or lacks power in the opposite
direction with high armature current in the opposite direction or;
Accelerates slowly and exceeds normal speed in the opposite direction with high
armature current only.
NOTE: Field current will be very low in the opposite direction.
Ø
Accelerates slowly and exceeds normal speed in both directions plus high
armature current.
NOTE: Field current will be very low.
Ø
Does not run in either direction plus there is noise from motor (hum or whine)
with high field current and low armature current.
Ø
Excessive spark when connecting battery
Ø
Does not run or runs very slow with low motor current and high battery current.
Maintenance, Service, and Repair
SYMPTOMS GO TO
CONTACTORS, P 13
CONTACTORS, P 13
CONTACTORS, P 13

PLUGGING DIODE,

P 12
ISO, P 13

FREEWHEEL DIODE,

P 12
Electrical Troubleshooting
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