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-12-
XII. TROUBLESHOOTING
PROBLEM POSSIBLE SOLUTION
Compressor will not run, compressor has no current draw. 1. Main circuit breaker open.
2. Compressor overload tripped.
3. Cabinet temperature satised.
4. Wired wrong or faulty connection.
5. INTELA-TRAUL
®
control malfunction.
6. Start component malfunction.
7. Compressor motor windings open.
Compressor will not run, current draw and trips overload. 1. Low voltage.
2. Start component malfunction.
3. Compressor windings shorted.
4. Locked rotor.
5. Excessive discharge pressure.
Compressor short cycles on overload. 1. Low voltage.
2. Low refrigerant charge.
3. Dirty condenser coil and/or lter.
4. Wired wrong or faulty connection.
5. Condenser fan inoperative.
6. Run capacitor malfunction.
7. Start component malfunction.
8. INTELA-TRAUL
®
control malfunction.
9. High head pressure.
Compressor short cycles. 1. Improper air ow over evaporator coil.
2. Low ambient conditions.
3. INTELA-TRAUL
®
control malfunction.
4. Bad sensors.
5. Temp differential set too close.
Continuous unit operation. 1. Loss of refrigerant.
2. Excessive drawer openings.
3. INTELA-TRAUL
®
control malfunction.
4. Broken compressor valves.
5. Very dirty condenser and/or lter.
6. Check the “DL,” if higher than 160F.
Compressor run time lengthy. 1. Partial loss of refrigerant.
2. High ambient conditions.
3. Dirty condenser coil or improper air ow over.
Condenser coil. 1. Excessive product load.
2. Excessive drawer openings.
3. Drawer gasket requires replacement.
4. INTELA-TRAUL
®
control malfunction.
5. Contaminates in refrigeration system.
6. Compressor valve leakage.
7. Inadequate defrost cycle.
Low suction pressure. 1. Capillary tube restricted.
2. Drier plugged.
3. Loss of refrigerant.
4. Poor air ow.
5. Iced evaporator coil.
High head pressure. 1. Improper air ow across condenser.
2. High ambient conditions.
3. Overcharge of refrigerant.
4. Air in system.
5. Dirty condenser coil.
Will not defrost or inadequate defrost. 1. Defrost heater malfunction.
2. Wired wrong or faulty connection.
3. Cabinet air leak.
4. Coil sensor failure.
5. INTELA-TRAUL
®
control malfunction
1
.
Coil icing. 1. Number of defrost cycles too few.
2. Defrost duration too short.
3. Cabinet air leak.
4. Drain tube plugged.
5. Defrost heater not working.
6. Non-frozen product put into cabinet.
7. Coil sensor failure.
The cabinet & coil sensors show high temperature. 1. Sensor needs replacing (place sensor tip and thermometer in ice
water. Change sensor ir readings differ, or if sensor displays
-40 02 266)
Certain procedures in this section require electrical and refrigeration system test or measurements
while power is applied to the machine, exercise extreme caution at all times. If test points are not easily accessible,
disconnect power, attach test equipment and reapply power to test.
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Contents Summary of Traulsen

  • Page 1Traulsen Refrigeration SERVICE MANUAL Instructions For The Troubleshooting And Repair Of Traulsen Full-Size Undercounter Refrigerators and Freezers TU044HT, TU072HT & TU100HT Refrigerator Models TU044LT & TU072LT Freezer Models This manual is prepared for the use of trained Authorized Traulsen Servi
  • Page 2TABLE OF CONTENTS I. THE SERIAL TAG Page 1 V. CONDENSER FAN MOTOR OR BLADE Page 4 II. GENERAL INFORMATION Page 2 VI. CONDENSER COIL Page 5 a-Introduction Page 2 VII. EVAPORATOR FAN Page 5 b-Model Designations Page 2 VIII. COMPRESSOR Page 6 c-Wiring Diagram Page 2 IX. WIRING DIAGRAM Page 7 d-Installa
  • Page 3II. GENERAL INFORMATION II. a-INTRODUCTION: II. f-TOOL REQUIREMENTS (cont’d): This manual applies to the following models only: ● Refrigeration Guage Manifold ● Refrigeration Reclaiming Equipment TU Series Full-Size Undercounter Refrigerators ● Acetylene Torch TU044HT, TU072HT & TU100HT ● Anti-Stati
  • Page 4II. GENERAL INFORMATION (cont’d) II. i-THE MICROPROCESSOR CONTROL: II. m-SPECIFICATIONS-REFRIGERATOR: For detailed information on replacement, repair or adjustment of the INTELA-TRAUL® microprocessor control please refer to it’s TU044HT TU072HT TU100HT manual, form number TR35705 or contact our Serv
  • Page 5III. SERVICE ACCESS (cont’d) V. CONDENSER FAN MOTOR OR BLADE III. a-SYSTEM(cont’d): V. a-REPLACEMENT INSTRUCTIONS: To gain full access to the refrigeration system from the Disconnect the electrical power to the machine side, remove the side cover by removing the screws. and follow lockout/tag out pr
  • Page 6VI. CONDENSER COIL VII. EVAPORATOR FAN VI. a-REPLACEMENT INSTRUCTIONS: VII. a-REPLACEMENT INSTRUCTIONS: Disconnect the electrical power to the Disconnect the electrical power to the machine and follow lockout/tag out procedures. machine and follow lockout/tag out procedures. This procedure requires
  • Page 7VIII. COMPRESSOR VIII. a-COMPRESSOR: Disconnect the electrical power to the machine and follow lockout/tag out procedures. This procedure requires the use of re- frigerants, be certain the work area is well ventilated. Safety goggles and gloves shall be worn since refrig- erants may cause burns to t
  • Page 8IX. WIRING DIAGRAM NOTE: Refer to the wiring diagram below (applies to refrigerators and freezers units) for any service work performed by a qualified technician. -7-
  • Page 9X. SERVICE PROCEDURES & ADJUSTMENTS Certain procedures in this section require electrical test or measurements while power is applied to the machine. Excercise extreme caution at all times. If test points are not easily accessible, disconnect power, attach test equipment and reapply power to test. X
  • Page 10X. SERVICE PROCEDURES & ADJUSTMENTS (cont’d) Certain procedures in this section require electrical test or measurements while power is applied to the machine. Excercise extreme caution at all times. If test points are not easily accessible, disconnect power, attach test equipment and reapply power t
  • Page 11X. PROCEDURES & ADJ. (cont’d) XI. ELECTRICAL OPERATION Certain procedures in this section re- XI. a-NORMAL OPERATION: quire electrical test or measurements while power is 1. Conditions applied to the machine. Excercise extreme caution a) Unit connected to correct voltage (check using a volt me- at a
  • Page 12XI. ELECTRICAL OPERATION (cont’d) XI. c-COMPONENT FUNCTION: COMPONENT FUNCTION 1. Compressor Pumps refrigerant thru refrigeration system components and compresses the low pressure vapor into high pressure vapor. 2. Evaporator Fan Draws air across condenser coil to aid in removing heat from the refri
  • Page 13XII. TROUBLESHOOTING Certain procedures in this section require electrical and refrigeration system test or measurements while power is applied to the machine, exercise extreme caution at all times. If test points are not easily accessible, disconnect power, attach test equipment and reapply power t
  • Page 14XIII. SERVICE PARTS LIST NOTE: Part numbers listed are for standard products as currently manufactured. For products manufactured as other than standard, please contact the factory with model and serial number of unit in question. ITEM DESCRIPTION PART NUMBER Casters All Models 6” Adjustable - No Lo
  • Page 15XIV. SERVICE ASSISTANCE XIV. a-SERVICE INFORMATION: NOTE: Before calling for service, please check the following: Is the electrical cord plugged in? Is the fuse OK or circuit breaker on? Clean condenser coil Is the power switch on? Reset microprocessor control values to factory defaults. If after ch
  • Page 16HOURS OF OPERATION: Monday thru Friday 7:30 am - 4:30 pm CST Traulsen 4401 Blue Moud Road Fort Worth, TX 76106 Phone (800) 825-8220 Fax (817) 740-6757 Website: www.traulsen.com Quality Refrigeration © 2009 Traulsen - All Rights Reserved