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AcuTemp HemaCool HMC-MIL-1 Service Manual

Advanced technology blood product storage and transport refrigerator/freezer
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SERVICE MANUAL
®
TWO-TEMPERATURE HemaCool
Advanced Technology Blood Product Storage and Transport
Refrigerator/Freezer
Model HMC-MIL-1
NSN 4110-01-506-0895
ACUTEMP
www.acutemp.com
7610 McEwen Road
Dayton, OH 45459
U.S.A.
Telephone: (937) 312-0114
Fax: (937) 312-1277
E-mail: support@acutemp.com
HemaCool® Service Manual
Revision 2
May 2005

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Summary of Contents for AcuTemp HemaCool HMC-MIL-1

  • Page 1 SERVICE MANUAL ® TWO-TEMPERATURE HemaCool Advanced Technology Blood Product Storage and Transport Refrigerator/Freezer Model HMC-MIL-1 NSN 4110-01-506-0895 ACUTEMP www.acutemp.com 7610 McEwen Road Dayton, OH 45459 U.S.A. Telephone: (937) 312-0114 Fax: (937) 312-1277 E-mail: support@acutemp.com HemaCool® Service Manual Revision 2 May 2005...

  • Page 3: Table Of Contents

    ® HemaCool Service Manual Table of Contents Page Chapter 1. General Repair Work Information ..........1-1.

  • Page 5: Chapter 1. General Repair Work Information

    ® HemaCool Service Manual CHAPTER 1. GENERAL REPAIR WORK INFORMATION NOTE ® This manual assumes that, when viewing the HemaCool , the front is the side with the internal lid latches. The display screen is on the left when viewed from the front. Viewed from the front, the compressor and electronics compartment is on the left side of the unit, while the batteries are under the battery side tray on the right side.

  • Page 6: Principles Of Operation

    ® HemaCool Service Manual (2) A list of symptoms or problems and the circumstances in which they occur. (3) A record of everything you see on the display. (4) Reference steps or illustrations in this manual to describe steps you’ve already taken. ®...
  • Page 7 ® HemaCool Service Manual The assembled case is divided into three compartments (Figure 1-1): (1) The electronics compartment, which is on the left side when you face the display. (2) The payload compartment, which is in the middle and is covered by a separate internal lid. (3) The battery compartment, which is on the right side when you face the display.
  • Page 8 ® HemaCool Service Manual The electronics compartment holds the compressor, condenser, condenser fan, control, and power electronics and has the circulating air intake and exhaust ports. The power panel and display panel are also mounted from within this compartment. The air intake filters are mounted on the power panel and the display panel. The payload compartment has a liner that holds the blood bag baskets or other containers.
  • Page 9 ® HemaCool Service Manual Figure 1-3. Power Panel REV 2...

  • Page 10: Normal Operation

    ® HemaCool Service Manual 1-3. NORMAL OPERATION ® Figure 1-4 is a functional block diagram of the HemaCool as described below. In normal operation, the evaporator temperature sensor is monitored by the control board processor chip, which compares its output to an internal look-up table. This table lists the evaporator temperatures at which the compressor should turn on and off to maintain the temperature selected on the power panel.
  • Page 11 ® HemaCool Service Manual Figure 1-4. Functional Block Diagram REV 2 1-7/1-1-8 blank...

  • Page 13: Chapter 2. Maintenance Procedures

    ® HemaCool Service Manual CHAPTER 2. MAINTENANCE PROCEDURES 2-1. PART REPLACEMENT MAINTENANCE PROCEDURES Before performing any maintenance on the unit, the following steps must be completed: ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED.
  • Page 14 ® HemaCool Service Manual ® Figure 2-1. HemaCool Power Panel REV 2...
  • Page 15 ® HemaCool Service Manual ® Figure 2-2. HemaCool Display and Control Panel REV 2...

  • Page 16: Replacing Fuses

    ® HemaCool Service Manual 2-2. REPLACING FUSES Required Test equipment Continuity tester or ohmmeter Required Tools None Required Parts Two Fuses, PN 100523 Removal ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED.

  • Page 17: Cleaning The Air Intake Filters

    ® HemaCool Service Manual 2-3. CLEANING THE AIR INTAKE FILTERS Required Test Equipment None Required Tools 1/4-in. Flat-bladed screwdriver #2 Phillips-head screwdriver Required Parts Replacement filters if needed, PN101964 NOTE ® • The case air intake filters in the HemaCool should be checked monthly during normal indoor use and cleaned when the presence of dust or dirt is apparent.
  • Page 18 ® HemaCool Service Manual Figure 2-3. Display and Control Panel Filter REV 2...
  • Page 19 ® HemaCool Service Manual Figure 2-4. Power Panel Filter REV 2...
  • Page 20 ® HemaCool Service Manual (4) Grasp underneath the filter handle (4) and pull outward. (5) Remove the four screws (5) attaching the plastic filter (6) to the filter assembly (1). NOTE If the filter foam is damaged, it must be replaced. (6) Separate the plastic filter (6), then remove the foam filter.

  • Page 21: Replacement Of Batteries

    ® HemaCool Service Manual 2-4. REPLACEMENT OF BATTERIES Required Test Equipment None Required Tools #2 Phillips-head screwdriver 1/4-in. Ratchet with a 5/16-in. socket Required Parts Two batteries, PN 101880 Removal ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED.
  • Page 22 ® HemaCool Service Manual Figure 2-5. Replacement of Batteries REV 2 2-10...
  • Page 23 ® HemaCool Service Manual (10) Disconnect the positive and negative leads from the inner terminals of each battery (3). b. Installation The fusible link wires going to the positive (+) battery terminals are YELLOW, while those going to the negative (-) terminals are BLACK. If these colors are accidentally reversed, it will not damage the ®...

  • Page 24: Replacement Of Fusible Link Assembly

    ® HemaCool Service Manual 2-5. REPLACEMENT OF FUSIBLE LINK ASSEMBLY Required Test Equipment None Required Tools #2 Phillips-head screwdriver 1/4-in. Ratchet with a 5/16-in. socket Required Parts Fusible link assembly PN 100956 Nylon wire ties Removal ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED.
  • Page 25 ® HemaCool Service Manual (9) Lift the batteries (3) out of the battery compartment (9). (10) Disconnect the positive and negative leads from the inner terminals of each battery (3). (11) Cut the nylon wire ties that attach the fusible link assembly (5) to the battery lockdown bracket (7). b.

  • Page 26: Replacement Of Inner Lid Gasket

    ® HemaCool Service Manual 2-6. REPLACEMENT OF INNER LID GASKET Required Test Equipment None Required Tools Putty knife Isopropyl alcohol Sharp knife Required Parts Lid gasket, PN 100868 Removal ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED.
  • Page 27 ® HemaCool Service Manual b. Installation NOTE • Lid gasket is shipped as a two-rib unit and must be separated into two single-rib gaskets. • Gasket ribs must be installed with end seams staggered to prevent leakage. • Ends of ribs may need to be trimmed to fit, with a sharp knife. (1) Separate the two ribs of gasket by pulling apart lengthwise.
  • Page 28 ® HemaCool Service Manual Figure 2-6. Replacement of Inner Lid Gaskets REV 2 2-16...

  • Page 29: Replacement Of Inner Lid Assembly

    ® HemaCool Service Manual 2-7. REPLACEMENT OF INNER LID ASSEMBLY Required Test Equipment None Required Tools #1 Phillips-head screwdriver #2 Phillips-head screwdriver 1/4-in. Flat-bladed screwdriver Required Parts Lid Assembly, PN 100850 Removal ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED.
  • Page 30 ® HemaCool Service Manual (4) Apply downward pressure to the lid (1), above each hinge (3). Using a #1 Phillips-head screwdriver, remove the outer screw (4) of each hinge (3), then remove the inner screw (5). (5) Raise the lid (1) vertically to remove. Installation NOTE In the following step, it may become necessary for one person to pull outward on the top...
  • Page 31 ® HemaCool Service Manual Figure 2-7. Replacement of Inner Lid Assembly 2-19 REV 2...

  • Page 32: Replacement Of Power Supply

    ® HemaCool Service Manual 2-8. REPLACEMENT OF POWER SUPPLY Required Test Equipment None Required Tools #2 Phillips-head screwdriver 1/4-in. Ratchet with a 3/8-in. socket 1/4-in. Flat-bladed screwdriver Required Parts Power Supply, PN 101763 Small nylon wire ties Removal ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED.
  • Page 33 ® HemaCool Service Manual Figure 2-8. Replacement of Power Supply 2-21 REV 2...
  • Page 34 ® HemaCool Service Manual NOTE • The power supply wiring is connected to a terminal strip located on the top of the power supply (6). • All wires must be tagged and marked prior to removal. (6) Label the power supply wiring attached to the terminal strip. (7) Loosen the two 3/8-in.

  • Page 35: Replacement Of Control Motherboard

    ® HemaCool Service Manual 2-9. REPLACEMENT OF CONTROL MOTHERBOARD Required Test Equipment None Required Tools #1 Phillips-head screwdriver 1/4-in. Ratchet with a 3/8-in. socket Required Parts Control motherboard, PN 100889 Removal ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED.
  • Page 36 ® HemaCool Service Manual Figure 2-9. Replacement of Control Motherboard REV 2 2-24...
  • Page 37 ® HemaCool Service Manual NOTE In the following step a 3/16-in. nylon spacer is installed behind each board-mounting screw and must be captured for reinstallation of the control board. (8) Carefully remove the six screws (5) attaching the control motherboard (3) to the chassis. Capture the six spacers (6), and remove the control motherboard.

  • Page 38: Replacement Of 3.6 Volt Lithium Backup Battery

    ® HemaCool Service Manual 2-10. REPLACEMENT OF 3.6 VOLT LITHIUM BACKUP BATTERY Required Test Equipment None Required Tools #2 Phillips-head screwdriver Required Parts Lithium ion battery, PN 103014 Removal ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED.
  • Page 39 ® HemaCool Service Manual b. Installation NOTE • If removing the 3.6 volt lithium battery is being done to clear all data from the display board, replacing the lithium battery will not be necessary. • The 3.6 volt lithium battery is installed with the positive terminal down. (1) Install the 3.6 volt lithium battery (8) into the control motherboard (3) with the positive terminal down.

  • Page 40: Replacement Of Condenser Fan Assembly

    ® HemaCool Service Manual 2-11. REPLACEMENT OF CONDENSER FAN ASSEMBLY Required Test Equipment None Required Tools #2 Phillips-head stubby screwdriver Required Parts Condenser blower fan, PN 100801 Small nylon wire tie Removal ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED.
  • Page 41 ® HemaCool Service Manual Figure 2-10. Replacement of Condenser Fan Assembly 2-29 REV 2...
  • Page 42 ® HemaCool Service Manual Figure 2-11. Replacement of Compressor Connector Board REV 2 2-30...
  • Page 43 ® HemaCool Service Manual b. Installation (1) Install the condenser fan assembly (7) to the fan mount bracket using the three screws (6). (2) Connect the condenser fan assembly wire harness (2, Figure 2-11) to the compressor connector board (3). (3) Attach the condenser fan assembly wire harness (2) to the compressor process stub with a nylon wire tie.

  • Page 44: Replacement Of Display Main Pc Board

    ® HemaCool Service Manual 2-12. REPLACEMENT OF DISPLAY MAIN PC BOARD Required Test Equipment None Required Tools #1 Phillips-head right angle screwdriver #2 Phillips-head screwdriver 1/4-in. Flat-bladed screwdriver 1/4-in. Ratchet with a 3/16-in. socket or 3/16-in. nutdriver Required Parts Display main PC board, PN 100899 Removal ®...
  • Page 45 ® HemaCool Service Manual (6) Carefully remove the four Phillips-head screws (3) attaching the display board (2) to the control panel bracket and capture the spacers (4). (7) Detach the LCD ribbon from the display panel at the display board (2), then remove the board. b.
  • Page 46 ® HemaCool Service Manual Figure 2-12. Replacement of Display Main PC Board REV 2 2-34...

  • Page 47: Replacement Of Compressor Connector Board

    ® HemaCool Service Manual 2-13. REPLACEMENT OF COMPRESSOR CONNECTOR BOARD Required Test Equipment None Required Tools #2 Phillips-head screwdriver Required Parts Compressor power harness, PN 101839 Nylon wire tie Removal ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED.
  • Page 48 ® HemaCool Service Manual b. Installation (1) Connect the compressor power harness (4) to the control motherboard (6). (2) Connect the compressor connector board (3) to the compressor electronic unit (1). (3) Connect the condenser fan assembly wire harness (2) to the compressor connector board (3). (4) Install a nylon wire tie (5) and attach the compressor power harness (4) to the chassis.

  • Page 49: Troubleshooting

    ® HemaCool Service Manual 2-14. TROUBLESHOOTING General Troubleshooting Instructions ® • THE HEMACOOL UNIT WEIGHS 142 LBS (64.4 KGS) EMPTY AND UP TO 180 LBS (81.7 KGS) LOADED. ALWAYS USE AT LEAST TWO PEOPLE WHEN LIFTING OR MOVING THE UNIT TO PREVENT PERSONAL INJURY.
  • Page 50 If not, continue where you left off in the troubleshooting chart. (4) If problem cannot be corrected during normal troubleshooting, contact the manufacturer: Acutemp www.acutemp.com 7610 McEwen Rd. Dayton, Ohio 45459 U.S.A Telephone: (937) 312-0114 Fax (937) 312-1277 Email: support@acutemp.com REV 2 2-38...
  • Page 51 ® HemaCool Service Manual Figure 2-13. Troubleshooting, Unit Does Not Work 2-39 REV 2...
  • Page 52 ® HemaCool Service Manual Figure 2-14. Troubleshooting, Payload Temperature Too Cold REV 2 2-40...
  • Page 53 ® HemaCool Service Manual Figure 2-15. Troubleshooting, Payload Temperature Too Warm - Unit Runs 2-41 REV 2...
  • Page 54 ® HemaCool Service Manual Figure 2-16. Troubleshooting, Display Inoperative REV 2 2-42...
  • Page 55 ® HemaCool Service Manual Figure 2-17. Troubleshooting, Alarm Inoperative/False Alarms - Unit Runs at Proper Set Point 2-43 REV 2...
  • Page 56 ® HemaCool Service Manual Figure 2-18. Troubleshooting, Excessive Frost/Condensation in Payload Compartment - Repetitive REV 2 2-44...
  • Page 57 ® HemaCool Service Manual Figure 2-19. Troubleshooting, Batteries Not Charging REV 2 2-45/2-46 blank...

  • Page 59: Chapter 3. Illustrated Parts List

    ® HemaCool Service Manual CHAPTER 3. ILLUSTRATED PARTS LIST For part identification refer to Figure 3-1. ITEM PART NUMBER DESCRIPTION 100880 Lid, case 100868 Gasket, lid 100850 Lid assembly 101913 Screw, hex-head machine #10-32 x 2.00 Lg 101917 Washer, .203 ID x .688 OD x .046 Thick 101892 Battery lockdown bracket 100955...
  • Page 60 ® HemaCool Service Manual Figure 3-1. Replacement Parts REV 2...

  • Page 61: Appendix A. Schematics And Board Layouts

    ® HemaCool Service Manual APPENDIX A. SCHEMATICS AND BOARD LAYOUTS Figure A-1. Control Motherboard Layout REV 2...

  • Page 62: Control Motherboard Schematic (Sheet 1

    ® HemaCool Service Manual Figure A-2. Control Motherboard Schematic (Sheet 1 of 2) REV 2...

  • Page 63: Control Motherboard Schematic (Sheet 2

    ® HemaCool Service Manual Figure A-2. Control Motherboard Schematic (Sheet 2 of 2) REV 2...

  • Page 64: Display Circuit Board Layout

    ® HemaCool Service Manual Figure A-3. Display Circuit Board Layout REV 2...

  • Page 65: Display Circuit Board Schematic

    ® HemaCool Service Manual Figure A-4. Display Circuit Board Schematic REV 2 A-5/A-6 blank...

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