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X. PROCEDURES & ADJ. (cont’d)
X. f-SYSTEM CLEAN UP/INTRODUCTION
MASSIVE CONTAMINATION (cont’d):
NOTE: The replacement compressor MUST NOT be
installed until after system clean-up procedures have
been completed.
1) Remove the burned-out compressor as outlined under
“COMPRESSOR”.
2) Remove the capillary tube metering device.
3) Purge nitrogen through the high and low sides of
system until moisture and contaminated oil has been
removed from the remaining components of the
system.
4) Reassemble refrigeration system and add a CW style
liquid drier and a suction line drier.
5) Purge nitrogen through the high and low sides of
system for 5 minutes.
6) Evacuate refrigeration as outlined under
“EVACUATING SYSTEM” for 30 minutes. Repeat
nitrogen purge and evacuate two more times.
7) Charge system as outlined under “CHARGING
SYSTEM”. Allow for the increased liquid capacity of
the liquid line drier.
8) Reconnect power and check for proper operation.
9) Disconnect power and install any panels removed.
10) Return between 24 and 48 hours to recover gas,
replace liquid line drier with a CW style drier. Remove
the suction drier, but do not replace.
11) Evacuate and charge system as outlined under
“EVACUATING SYSTEM” and “CHARGING SYSTEM .
X. g-HEATER TEST-DRAWER PERIMETER HEATER:
1) Access the orange heater power wire connected to
terminal #4 of the relay module.
2) Plug the unit in and verify 120vac supply to heater
from the orange heater power wire.
3) Check for nominal amp draw (.25-.5 amps).
4) Disconnect power, check for continuity using an Ohm
meter from the orange heater wire to neutral.
XI. a-NORMAL OPERATION:
1. Conditions
a) Unit connected to correct voltage (check using a volt me-
ter).
b) Microprocessor off cycle defrost settings correct.
c) Condensing unit controlled by the microprocessor control.
d) Cabinet at desired temperature.
e) Door perimeter heaters are powered 100% of the time as pre-
set by the factory (this can be adjusted using the microprocessor
control).
f) Evaporator fan powered.
g) Microprocessor control operating correctly.
2. Cabinet temperature rises above set temperature.
a) Microprocessor control initiates compressor
operation.
b) Evaporator fan should be ON all the time.
3. Set temperature is met.
a) Conditions return to those outlined in step 1.
XI. b-DEFROST MODE:
1. Conditions
a) Unit operating in normal mode.
2. Defrost is initiated by the microprocessor control (an off-cycle
defrost should occur every 60 minutes for refrigerators or a hot
gas defrost every 4 hours for freezers.
3. Defrost terminated by either: 1) Evaporator Coil
Temperature or 2) Maximum Set Time Interval.
4. Cabinet returns to normal operation.
a) Temperature controlled by the microprocessor
control.
b) Evaporator fan stays ON, evaporator coil will reach
desired temperature.
XI. ELECTRICAL OPERATION
Certain procedures in this section re-
quire 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.
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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