Checking Receptacle's Circuit Breaker - WACKER Group LTC 4 Repair Manual

Electrical Troubleshooting Procedures

7.38 Checking Receptacle's Circuit Breaker

See Graphic: wc_gr003100
WARNING
7.38.1 Using the AC voltage setting on the multimeter, measure the incoming
7.38.2 Make sure the receptacle's circuit breaker is in the "ON" position.
7.38.3 Measure the outgoing voltage from the receptacle's circuit breaker by
wc_tx000429gb.fm
Electric shock hazard. Only qualified personnel should conduct this
test.
Complete this test with the machine running.
voltage to the receptacle's circuit breaker by measuring between the
black-yellow wire (a) and the neutral wires (b) of the terminal strip.
There should be 120V±10%.
• If 120V±10% is not measured, the receptacle's circuit breaker is
not receiving voltage. Check the condition of the wiring between
the receptacle's circuit breaker and the terminal strip. Repair/
replace the wiring as needed.
• If 120V±10% is measured, continue.
measuring between the black-yellow wire (c) and the neutral wires (b)
of the terminal strip. There should be 120V±10%.
• If 120V±10% is not measured, the receptacle's circuit breaker is
not functioning. Confirm that receptacle's circuit breaker is mal-
functioning by checking its continuity. Replace the circuit breaker
if needed.
• If 120V±10% is measured, continue troubleshooting by checking
the earth-leakage circuit breaker.
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LTC Repair