TROUBLE, SYMPTOM AND CONDITION
PROBABLE CAUSE
TEST, CHECK, AND/OR REMEDY
UNIT TRIPS OUT AFTER STARTING. (CONTINUED)
3. Fan not operating (also see causes and remedies under “Machine will not start”).
Step 1. Blown fuse (F1) on front panel of machine.
Replace fuse. See that power receptacle is not overloaded.
Step 2. Broken lead or connection to fan motor.
Repair wiring as necessary.
Step 3. Fan motor defective.
Disconnect fan motor leads and apply 115-V AC directly
to fan motor. If it fails to operate, replace it.
POWER SUPPLY CASE HAS VOLTAGE POTENTIAL ON IT.
1. Operator gets shock when machine case is touched.
Step 1. Case of machine not grounded.
Ground machine case to an earth-type ground if utility
ground is already connected; connect the normal safety
ground and recheck if “utility” ground had not been
connected.
POWER SUPPLY OUTPUT CURRENT VARIES WITHOUT VOLTAGE CHANGE
1. Abnormal current fluctuation, voltage nearly constant.
Step 1. Loose cable connections at output.
Check for overheated connections and tighten.
Electrical Troubleshooting Chart
Figure 1 (Sheet 5 of 7 Sheets)
OM-2010
3-4 April 10/89 Revised
Page 8
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