Electrical Troubleshooting Procedures LTC Repair
wc_tx000429gb.fm 102
7.16 Checking Voltage Between Main Circuit Breaker and Terminal
Strip
See Graphic: wc_gr003096
Electric shock hazard. Only qualified personnel should conduct this
test. Do not perform this test if you or the machine are wet.
Complete this test with the machine running and the main circuit
breaker in the ON position.
7.16.1 Remove the control panel front cover.
7.16.2 Using the AC voltage setting on the multimeter, measure the voltage
between the R/G wire (a) and the B/G wire (c). There should be
240V±10%.
• If 240V±10% is measured, the proper voltage is reaching the ter-
minal strip.
• If 240V±10% was not measured, continue.
7.16.3 Measure the voltage between the R/G wire (a) of the terminal strip and
the neutral wires at the terminal strip (b). There should be 120V±10%.
• If 120V±10% is measured, the R/G wire is carrying the proper
voltage.
• If 120V±10% was not measured, check the continuity of the R/G
wire between the circuit breaker (d) and the terminal strip (a).
Repair/replace the wire as needed.
7.16.4 Measure the voltage between the B/G wire (c) of the terminal strip and
the neutral wires at the terminal strip (b). There should be 120V±10%.
• If 120V±10% is measured, the B/G wire is carrying the proper
voltage.
• If 120V±10% was not measured, check the continuity of the B/G
wire between the circuit breaker (e) and the terminal strip (c).
Repair/replace the wire as needed.
WARNIN
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