Cornelius R-134A service manual Troubleshooting Refrigeration System

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TROUBLESHOOTING REFRIGERATION SYSTEM

Trouble

Probable Cause

Remedy

COMPRESSOR DOES NOT

A. Ice bank sufficient.

A. Refrigeration not called for.

OPERATE.

 

 

B.Unit power cord unplugged, power switch (if applicable) in “OFF”position, or drop-in refrigeration assembly power cord unplugged.

B.Plug in power cord(s) or place Unit power switch in “ON” position.

C.No power source (blown fuse or tripped circuit breaker).

D.Inoperative Unit power switch (if applicable) or power cord unplugged.

C.Replace fuse or reset circuit breaker. (NOTE: Fuse or circuit breaker are not part of unit).

D.Replace power switch or plug Unit power cord into electrical outlet.

E. Low voltage.

E. Voltage must be at least 103 volts

 

(115 VAC unit) or 208 (230 VAC

 

unit) at compressor terminal when

 

compressor is trying to start.

F.Loose, disconnected, or broken wiring.

G.Overload protector cut out; overheated compressor. Condenser fan motor not operating as required.

H.Inoperative overload protector or start relay.

F.Tighten connections or replace broken wiring.

G.Compressor will cool enough to restart. Do not overdraw cooling capacity of Unit. Refer to

“CONDENSER FAN MOTOR NOT OPERATING”in this section.

H.Replace inoperative part.

I.Inoperative ice bank control probe.

I.Replace ice bank control.

 

J.

Inoperative compressor.

J.

Call service person.

COMPRESSOR WILL NOT

A.

Ice bank control cap tube

A.

Replace ice bank control.

STOP AFTER SUFFICIENT

 

kinked or broken.

 

 

ICE BANK IS PRODUCED.

 

 

 

 

(NOTE: ICE BANK SHOULD

 

 

 

 

JUST COVER CONTROL

 

 

 

 

BULB).

 

 

 

 

B.Ice bank control stuck in closed position.

B.Replace ice bank control.

45

312027000

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Page 49 Page 51
Contents Installation/Service Manual This Document Contains Important InformationTable of Contents Table of Contents cont’d Troubleshooting Refrigeration System Compressor Operates Continuously but does not FormSafety Information Page This page Left Blank Intentionally General Description Unit DescriptionWarranty Reference Information Theory of Operation Flow Diagram FIVE-FLAVOR Unit with BUILT-IN Cold Carbonator Flow Diagram SIX-FLAVOR Unit with BUILT-IN Cold Carbonator This page Left Blank Intentionally Unpacking and Inspection Identification of LOOSE-SHIPPED PartsSelecting Location Installing UnitConnecting Plain Water Source Lines to Unit Cutting Hole in CountertopSyrup Inlet Supply Line Connections SIX-FLAVOR Unit Shown Connecting Syrup Source Lines to Unit Sealing Unit Base to Countertop Connecting CO2 Source Line to UnitPreparing Unit for Operation Fill Water Tank and Start Refrigeration SystemUnit Operation UnitAdjust WATER-TO-SYRUP Ratio Brix of Dispensed Product 312027000 Operating Controls Daily PRE-OPERATION CheckUnit Operation AdjustmentsCleaning and Sanitizing Replenishing CO2 SupplySanitizing Syrup Systems Cleaning CO2 GAS Check ValvesChecking ICE Water Bath This page Left Blank Intentionally Hood and Front Panel Removal Front Access Panel RemovalPreparing Unit for SHIPPING, STORING, or Relocating Periodic InspectionDispenser Components Adjusting Dispensing Valves Water Flow Rate SF-1 Dispensing ValveUF-1 Dispensing Valve Adjusting WATER-TO-SYRUP Ratio Brix of Dispensed Product Cleaning DROP-IN Refrigeration Assembly Condenser Coil Cleaning Water Tank Water Tank Flush Syrup Systems Sanitizing POST-MIX Syrup SystemsWash Syrup Systems Sanitize Syrup Systems Water Flush Syrup SystemsPurge Water OUT of Syrup Systems Restore Operation 312027000 Water Strainer Screen and DOUBLE-LIQUID Check Valve Liquid Check Valve Assembly Syrup Tank System Cleaning CO2 System CO2 GAS Check ValvesSyrup Flavor Change BAG-IN-BOX Syrup SystemWiring Schematic for Electronic ICE Bank Control Optional 560001023 301112002 301112002 Wiring Diagram SF-1 Dispensing Valve This page Left Blank Intentionally TOO LOW or TOO High Troubleshooting POST-MIX System SystemWATER-TO-SYRUP Ratio Comes OUT Dispensed ProductCarbonation TOO LOW Dispensing Valve Clear But Foams in CUP or GlassFrom ALL Dispensing Produces Foam AS ITLeaves Dispensing VALVE.CONT’D No Product Dispensed ValvesTroubleshooting Refrigeration System Not Form Sufficient ICE Bank Compressor OperatesContinuously but does Agitator Motor notWarranty Page One Cornelius Place Anoka, Minnesota 612 800
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R-134A specifications

Cornelius R-134A is a refrigerant commonly used in various cooling and air conditioning applications. It belongs to the hydrofluorocarbon (HFC) family and has become a favored alternative to many ozone-depleting substances. Unlike its predecessors, R-12, which has been phased out due to its detrimental effects on the ozone layer, R-134A offers a more environmentally friendly solution, albeit still having global warming potential.

One of the main features of R-134A is its favorable thermodynamic properties. It exhibits a low boiling point of approximately -26.3°C (-15.3°F), making it suitable for various refrigeration applications, including automotive air conditioning, commercial cooling systems, and domestic refrigerators. Its efficiency is regarded as superior, allowing for quick heat absorption and dissipation. This efficiency translates into energy savings, ultimately benefiting both consumers and manufacturers.

R-134A also boasts a relatively high vaporization heat, demonstrating its effectiveness in heat transfer processes. The low toxicity and non-flammability of R-134A further enhance its appeal, as it poses minimal risk during handling and application. This characteristic makes R-134A safer for technicians and users compared to older refrigerants, which presented higher health hazards.

Within modern technologies, R-134A plays a crucial role in both chiller systems and heat pump applications. It is compatible with various lubricants, allowing manufacturers to utilize R-134A in existing systems with minimal modifications. However, it is essential to use the correct type of oil, as mixing different types can lead to system inefficiencies and potential failure.

Despite its advantages, R-134A has a global warming potential of around 1,430 times greater than carbon dioxide, prompting the refrigerant industry to look for alternatives. Newer refrigerants, such as R-1234yf, offer lower environmental impact, driving a shift towards more sustainable options.

In conclusion, Cornelius R-134A remains a widely used refrigerant known for its efficiency, safety, and effectiveness in heat transfer. While it has played a significant role in the refrigeration and air conditioning industries, the ongoing search for eco-friendly alternatives highlights the need for continued innovation and adherence to environmental standards.
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