Disconnect power. Use a multimeter to check the continuity of the start relay and overload. Replace if open-circuit. Issue 2: Compressor is Running but Not Cooling Cause: Refrigerant leak or inefficient compressor valves.
This model is designed for Fan Cooling , meaning it requires active airflow across the compressor body to maintain optimal operating temperatures and prevent overheating during long duty cycles. Maintenance & Diagnostic Tips
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Elias wiped grease from his forehead, leaving a dark smear. He was lying on his back on the frigid grating, staring up into the guts of the machine. The massive unit shuddered, groaned, and died with a pneumatic wheeze. l68wu1 compressor pdf
The Donper L68WU1 is a reciprocating refrigeration compressor engineered for high-efficiency cooling in commercial and residential refrigeration applications. As a prominent component in the Donper Compressor series, the L68WU1 is specifically designed to work with R290 refrigerant (propane)
For technicians looking for the L68WU1 technical data sheet , several critical installation factors must be noted:
: Nominally rated close to 6.8 cc (correlating with its sibling, the L68CU1). Disconnect power
A bimetallic safety disk that cuts incoming line voltage if internal housing temperatures or current draw surge dangerously.
: Fan Cooling (requires forced air cooling over the condenser side). Start Torque : Low Starting Torque (LST). Motor Type : RSIR (Resistive Start-Inductive Run). 🛠️ Common Applications Because this model utilizes R290 refrigerant and operates under Low Back Pressure (LBP)
is a compressor, a design favored for its robust performance and durability. Specification Model Refrigerant R290 (Propane) Cooling Capacity Suitable for units with 300 to 350 liters Application Low Back Pressure ( LBP ) Voltage/Frequency 220-240V ~ 50Hz Motor Type RSCR (Resistance Start - Capacitor Run) Start Torque Low Starting Torque (LST) Control Device Capillary tube Cooling Method Fan cooling Key Features & Benefits Issue 2: Compressor is Running but Not Cooling
Usually the top pin (or bottom, depending on orientation). Connects to the overload protector.
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A standout feature of the L68WU1 is its use of , also known as propane, as its refrigerant. This choice is part of a global move toward more environmentally sustainable refrigerants. R290 is a natural refrigerant with a Global Warming Potential (GWP) of just 3. In comparison, many legacy refrigerants can have a GWP in the thousands. The phase-down of hydrofluorocarbons (HFCs) under international agreements, like the Kigali Amendment to the Montreal Protocol, is driving the shift towards these low-GWP alternatives.