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Summary of Contents for EdgeStar OR320SS
- Page 1 Document Type: Service Manual Version: V1.0 01242018 EdgeStar, 8606 Wall St, Suite 1800, Austin, TX 78754 support.edgestar.com • service@edgestar.com • edgestar.com...
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Page 2: Table Of Contents
CONTENTS CONTENTS ............................ 1 SAFETY PRECAUTIONS ......................1 SPECIFICATIONS ......................... 4 PARTS BREAKDOWN ......................... 5 TECHNICAL INFORMATION ..................... 7 WIRING DIAGRAM........................8 CONTROL SYSTEM ........................9 SERVICE DIAGNOSIS OVERVIEW ..................10 SERVICE AND DISASSEMBLY STEPS ................... 10 SAFETY PRECAUTIONS WARNING: This manual and the information contained herein is intended for use by certified technicians. -
Page 3: Electrical Safety
Electrical Safety Do not exceed the power outlet ratings. It is recommended that the unit be connected to its own circuit. A standard electrical supply (120V, 60Hz), that is properly grounded in accordance with the National Electrical Code and all state and local codes and ordinances is required. ... -
Page 4: General Safety
General Safety Always unplug an appliance from the power supply before attempting any service. Disconnect the power cord by grasping the plug, not the cord. Do not allow children or pets to play on or in the appliance. ... -
Page 5: Specifications
Specifications OR320SS Rated Voltage 115V AC Rated Frequency 60 Hz Rated Current Power consumption 140 W Net Weight 69 lbs Refrigerant Type R134a Refrigerant Amount 1.94 Oz. Design Pressure 90~190 Psi Door Type Stainless Steel Frame Stainless Steel Lamp 9W Fluorescent Light... -
Page 6: Parts Breakdown
Parts Breakdown Exploded View of OR320SS... -
Page 7: Parts List
Parts List Number Description Door handle Stainless steel door Magnetic rubber gasket Evaporator fan 6&31&32&37 Shelves Lamp cover Lamp Evaporator Temperature Control Knob Thermostat (Pressure type) PTC heater 16&24 Thermostat (Metal expansion type) Top hinge Top hinge cover Adjustable foot Water pan Compressor Power cord... -
Page 8: Technical Information
Technical Information Refrigerant Cycle... -
Page 9: Wiring Diagram
Wiring Diagram... -
Page 10: Control System
Control System This model has three thermostats: one pressure type thermostat and PTC heater for the compressor and evaporator fan, and two metal expansion types (one in the base plate and the other in the cabinet.) Pressure type Thermostat Metal expansion type Thermostat Hi-point close temperature: 14±2℃... -
Page 11: Service Diagnosis Overview
Service Diagnosis Overview Malfunction Category Check Point Unit plug and wall socket Compressor Delay Control Board and Transformer Unit Does Not Run Compressor Starter Relay and Overload Protector Wiring Connections Compressor Low Refrigerant Charge or Leak Unit Does Not Cool Detecting and Repairing Leaks Pulling Vacuum and Recharging Environmental Conditions... - Page 12 Unit Does Not Run Troubleshooting Overview STEP Possible Cause Correction Remark The Unit is unplugged. Plug in. If problem continues go to step 2 Socket not correct voltage or Check and repair or replace. If problem continues go to step 3 is damaged.
- Page 13 Accessing Components for Testing / Replacement To remove the back cover of the unit. Remove the five (5) screws. Remove the back cover and set aside for later use. Disconnect the power cord from the outlet, Remove the screws on the control board cover. Remove the cover Remove the terminals and replace the main control board and transformer.
- Page 14 Using a flat head screw driver, remove the cover on the side of the compressor that houses the relay and overload protector. Remove the wiring bracket screw and the ground wire screw. Remove and replace relay and overload protector and reconnect them to the compressor. Reinstall the wiring screws and component cover.
- Page 15 Unit Does Not Cool Troubleshooting Overview STEP Possible Cause Correction Remark Low refrigerant charge or Check discharge and suction pipes Continue to step 2 leak in system. from compressor. Discharge pipe not hot and Check system for leak(s) and repair. Continue to step 3 suction pipe not cool.
- Page 16 Attach a Piercing Valve to the Suction Pipe on the Compressor and Skip to 2.5. If no piercing valve is available continue to 2.1. Cut off the process tube. Remove the process tube. Replace process tube preferably with a built in gauge/vacuum connector (below.) Braze in the new process tube with a bead of brazing solder.
- Page 17 If the new process tube does not come with a gauge/vacuum connector, attach a connector to the end of the process tube. Charge the Unit with Nitrogen. Connect the Nitrogen to the Piercing Valve or Process Tube and Fill unit to a Pressure of 145PSI or 1Mpa.
- Page 18 Once ALL leaks have been repaired release any remaining nitrogen. Connect the unit to a vacuum pump and apply vacuum for no less than 20 minutes to remove the nitrogen and other objects from the refrigeration system. Charge the unit with refrigerant until the watt meter indicates a proper charge. You may weigh in the appropriate charge if no watt meter is available.
- Page 19 Unit Does Not Have Leak or Refrigerant Issue but Still Does Not Cool Enough Troubleshooting Overview STEP Possible Cause Correction Remark Environmental conditions or Check for heat sources around unit If unit still does not cool faulty door seal. and make sure door seals correctly. continue to step 2 Defective fan.
- Page 20 Remove the fan motor. Disconnect the fan motor from the control board. Connect the new fan motor. Install the new fan motor. Reinstall the back panel as previously shown.
- Page 21 Unit Too Noisy Troubleshooting Overview STEP Possible Cause Correction Remark Check floor surface and/or adjust If unit still noisy continue to Unit not level. leveling legs. step 2 Assure refrigerant lines are not Vibrating parts/components. touching and all screws and bolts are tight.
- Page 22 Light Does Not Work Troubleshooting Overview STEP Possible Cause Correction Remark If light still does not work Bulb not secure. Tighten bulb. continue to step 2 Bulb defective. Replace bulb. Service Instructions Check and ensure the bulb is tightened correctly. If the bulb is defective please replace as follows: Remove the plug from the power outlet.
- Page 23 EdgeStar, 8606 Wall St, Suite 1800, Austin, TX 78754 support.edgestar.com • service@edgestar.com • edgestar.com...
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