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9.3 Troubleshooting
This section is designed to aid the electrical technician in basic load bank system
troubleshooting. All of the problems listed can be verified with a basic test meter and/
or continuity tester. For safety reason, when troubleshooting load banks systems, always
remove power, fan/control power, etc.
9.3.1
Common Issues:
Common Issues
Causes
Cooling Fan Motor Will Not
Operate
•
Fan/Control power not available/incorrect
•
Inoperative fan motor or control power
•
Fan switch is “Off” or not functioning
•
Restriction of air (intake or exhaust)
Cooling failure indicated
element chamber
temperature has exceeded
175˚F:
•
Over temperature sensor failure
• Fan failure
•
Air Restriction (intake or exhaust)
•
Over-voltage condition present
Some Load Steps Cannot Be
Energized
•
Open load step resistor(s)
•
Inoperative load step switches
•
Inoperative load step contactors
•
Open load step fuses
Table 3 Troubleshooting Table
