Published at Monday, March 25th, 2019 - 20:08:15 PM. wiring. By Elisabeth Levy.
For example, let’s say the red probe of the voltmeter is initially connected before the CR contact to read line voltage, which is 115 V in this example. If the CR contact is electrically closed when the red probe is placed after the CR contact, the voltmeter should again read 115 volts. If the voltmeter reads 0 V, the CR contact is electrically open. This process can be repeated for all of the switches in the circuit. Again if line voltage is read before a switch and after the switch, the switch is electrically closed.
The importance of understanding and using wiring diagrams to troubleshoot refrigeration systems cannot be overemphasized. Most system problems can be divided into two broad categories: electrical or mechanical. However, the majority of system problems are electrical. Mastering the use of wiring diagrams enables a technician to better troubleshoot the system electrically, which will facilitate troubleshooting the entire system with more accuracy and precision.
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