Compressor Troubleshooting; Terminology - Traulsen G Series Service Manual

6.2

Compressor Troubleshooting

6.2.1 Terminology:

• OEM – Original Equipment Manufacturer – Refers to the manufacturer of a piece of equipment or
component.
• RLA – Rated Load Amps – The OEM test conditions amperage rating (does not necessarily indicate the
normal running amperage as conditions and applications can vary from OEM test conditions)
• LRA – Locked Rotor Amps – The OEM test condition lock rotor amperage rating indicating the expected
amperage at which a motor does not turn when power is applied.
• Microfarad – This is a unit of measure for capacitance; the symbol for Microfarad is µF.
• Current – The flow of electrons in an electrical circuit measured in Amps with an Amp Meter.
• Resistance – The opposition to the flow of electrical current measured in Ohms with an Ohm Meter; the
symbol for ohms is Ω.
• Back EMF – The voltage generated by the start winding once the compressor runs which is higher than
line voltage.
•
Pick-up Voltage – The back EMF value at which the normally closed contacts of a potential relay open.
First verify that the Call for Cooling LED on the display is illuminated. See Control Section.
Figure 47: Compressor
49