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6-3. Troubleshooting Table
Trouble
Unit is completely inoperative; fan does
not run.
Unit is completely inoperative; fan
runs.
Load switches trip Off when current is
applied.
No meter displays.
Load switches do not change load.
No voltage signal at Load Voltage Jack
Plugs.
Notes
Be sure input power cord is plugged in and that receptacle is receiving input power.
Thermostat TP1 open caused by overheating. Allow cooling period for TP1 to close and remove
overload condition.
Have Factory Authorized Service Agent check relays CR1, CR2, and CR3.
Be sure at least 1 switch is On for every 50 Amps of applied load.
Have Factory Authorized Service Agent check load switches CB1-CB7.
Have Factory Authorized Service Agent check meters.
Have Factory Authorized Service Agent check load switches and internal resistors.
Check Fuse F1, and replace if necessary (see Section 5-2).
Remedy
OM-2807 Page 15
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