Scotsman CME306 Technical Training Manual page 18

• Positive Temperature Coefficient Resistor
– Replaces Start Relay
– Eliminates Start Capacitor
– In Series with the Compressor Start Winding
– Flows Full Current at Lower Temperature
– Blocks Current Flow at Higher Temperature
– Changes Temperature with Current Flow
• Normal Operating Temperature is 180
– Must Cool Down to be able to Restart Compressor
• About 4 - 5 minutes of Off time
PTCR
PTCR
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