TROUBLE, SYMPTOM AND CONDITION
PROBABLE CAUSE
TEST, CHECK, AND/OR REMEDY
UNIT TRIPS OUT AFTER STARTING (CONTINUED)
Step 3. Ambient temperature too high.
Operate at reduced loads when temperature exceeds
104F (40C) or improve cooling ambient.
Step 4. Ventilation blocked.
Check that air intake and exhaust openings are not
obstructed.
Step 5. Fan not operating.
Check fuse F1 on front panel. If it is good, disconnect the
fan motor leads and apply 115-VAC directly to fan motor.
Replace fan motor if it fails to operate or if its bearings are
defective.
Step 6. Shorted output.
Reset electronic overload.
2. Overvoltage/Overload trip. Malfunction is in units internal circuitry.
Step 1. Control circuit board failure.
Refer to detailed troubleshooting instructions.
Step 2. Loose connections in voltage control circuit
Check for loose connections. Tighten and secure as
required.
Step 3. Starting current potentiometer (R13) burned out.
Replace potentiometer.
Electrical Troubleshooting Chart
Figure 1 (Sheet 4 of 7 Sheets)
OM-2010
April 10/89 Revised 3-4
Page 7
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