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USER GUIDE
FROST FREE REFRIGERATION
Cooling Mode
• Bypass solenoid closed.
• Evaporator fan operating.
• Refrigerant flows through capillary tubes.
• Normal vapor/compression cycle refrigeration.
CONDENSER
DRYER
Troubleshooting - Extended 1
COMPRESSOR
FLOW WHEN SOLENOID
VALVE IS CLOSED
CAPILLARY TUBE
SOLENOID VALVE
Figure 1. Frost Free Refrigeration System.
45
Defrost Mode
• Bypass solenoid valve open.
• Refrigerant flows through bypass system.
• Vapor flows from condenser to evaporator without a
phase change.
EVAPORATOR
FLOW WHEN SOLENOID
VALVE IS OPEN
ULIN_0369_A
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Table of Contents
Troubleshooting
