Summary of Contents for Gaymar MEDI-THERM II MTA5900 Series
- Page 1 MEDI-THERM II HYPER/HYPOTHERMIA MACHINE MTA5900 SERIES LISTED 303L SERVICE MANUAL P/N 10187-000 7/98...
- Page 2 See p. 86, figure B. additional details. OPERATING INSTRUCTIONS For information on operating the Medi-Therm II machine, refer to the Medi-Therm II Operating Instructions. Clik-Tite is a registered trademark of Gaymar Industries, Inc. ©1998. Gaymar Industries, Inc. All rights reserved.
-
Page 3: Table Of Contents
SERVICE MANUAL CONTENTS Medi-Therm II CONTENTS Section Description Page PATIENT SAFETY ..................1 MACHINE PRECAUTIONS ..............3 REPAIR POLICY ..................4 In-Warranty Repairs ................4 Out-of-Warranty Repairs ..............4 SPECIFICATIONS ..................5 Physical Specifications ................ 5 Thermal Specifications ............... 5 Electrical Specifications .............. - Page 4 FIGURES SERVICE MANUAL Medi-Therm II ILLUSTRATIONS Figure Description Page Typical Warm-up Rate ................6 Typical Cooldown Rate ................6 Medi-Therm II System ................. 8 MT590 Test Tool ..................24 Initiating Service Mode 1 ................35 6A/6L Troubleshooting Charts ................38 Accessing RFU Codes ..................
-
Page 5: Patient Safety
SERVICE MANUAL PATIENT SAFETY Medi-Therm II PATIENT SAFETY Use the Medi-Therm II Hyper/Hypothermia machine only under the direction of a physician. Review the following precautions and procedures prior to each application: DANGER Do not use the Medi-Therm II machine in the presence of flammable anesthetics. - Page 6 PATIENT SAFETY SERVICE MANUAL Medi-Therm II PATIENT SAFETY WARNING (continued) • Avoid placing additional heat sources between the patient and blanket. Skin damage can result. Heat applied by the blanket can result in a rise in skin temperature at the areas of contact. The additional heat rise due to electrosurgical currents flowing to the dispersive electrode could be sufficient to cause tissue injury.
-
Page 7: Machine Precautions
SERVICE MANUAL MACHINE PRECAUTIONS Medi-Therm II MACHINE DANGER PRECAUTIONS Disconnect power before servicing unit. Risk of electric shock. WARNING • Repairs should be performed only by qualified personnel such as certified biomedical electronics technicians or certified clinical engineers familiar with repair practices for servicing medical devices, and in accordance with the Medi-Therm II Service Manual. -
Page 8: Repair Policy
The Medi-Therm II Hyper/Hypothermia machine is warranted free of defects in material and workmanship for a period of two (2) years, under the terms and conditions of the Gaymar warranty in place at the time of purchase. The compressor portion of the machine carries a five (5) year prorated warranty. -
Page 9: Specifications
16 gph (gallons per hour) 12 gph (gallons per hour) Flow * (60.6 liters/hour) * (60.6 liters/hour) * (45.4 liters/hour) * * Minimum flow rates through a full size Gaymar Hyper/Hypothermia Blanket THERMAL SPECIFICATIONS THERMAL SPECIFICATIONS MTA5942 MTA5900 MTA5901 111.2°F (44°C) to 120.2°F (49°C) 109.4°F (43°C) to 120.2°F (49°C) -
Page 10: Electrical Specifications
(with full size blanket) (with full size blanket) ELECTRICAL SPECIFICATIONS ELECTRICAL SPECIFICATIONS MTA5900 MTA5901 MTA5942 Patient Temperature Measurement Accuracy ±0.5°C, ±0.9°F (using Gaymar 400 series probe) Display Accuracy ±0.3°C, ±0.5°F 1°C, 1°F Blanket Water Temperature Display Resolution Patient Temperature 0.1°C, 0.1°F ±0.8°C, ±1.4°F... -
Page 11: Probe Information
Patient probe—Skin surface (10' [3.0 meters] long); YSI400 series type Probe Adaptor • ADP10 Reusable adaptor cable for DP400: connects Gaymar disposable probe to Gaymar or Cincinnati Sub-Zero control unit for all applications that call for Baxter/Pharmaseal No. 66N2700. • ADP10B... -
Page 12: Medi-Therm Ii System
MEDI-THERM II SYSTEM SERVICE MANUAL Medi-Therm II control panel YSI 400 series or equivalent patient probe connector hose Hyper/Hypothermia blanket Medi-Therm II machine alternate slide pinch clamp clamp ® Clik-Tite connector Clik-Tite connectors and Quick-disconnects representative hose clamps on machine end Figure 3—Medi-Therm II System... -
Page 13: Theory Of Operations
SERVICE MANUAL THEORY OF OPERATION Medi-Therm II THEORY OF The Gaymar Medi-Therm II machine provides a means of regulating patient temperature by supplying temperature-controlled water through a connector OPERATION, SYSTEM hose to a Gaymar Hyper/Hypothermia blanket. The blanket provides an interface for heating or cooling the patient. - Page 14 THEORY OF OPERATION SERVICE MANUAL Medi-Therm II THEORY OF WATER TEMPERATURE CONTROL OPERATION, Hot and cold solenoid valves regulate the flow path by directing water returning from the blanket to either the hot or cold water reservoir. MEDI-THERM II Regulating the flow path controls the temperature of water pumped to the MACHINE (continued) blanket.
-
Page 15: Interconnections
SERVICE MANUAL THEORY OF OPERATION Medi-Therm II THEORY OF BACKUP SYSTEMS OPERATION, Backup systems within the Medi-Therm II machine limit the temperature of water exiting the machine to specified ranges in the event of a failure of the control MEDI-THERM II system including the microprocessor: MACHINE (continued) Maximum water temperature is limited by two bimetallic thermostats. -
Page 16: Power Supply
THEORY OF OPERATION SERVICE MANUAL Medi-Therm II SYSTEM Four cables connect the components in the base of the machine to the PC boards in the head (see figure 8, p.67): COMPONENT INTERCONNECTIONS • A 9-pin connector P6 ties the blanket water probe RT2, cold water reservoir probe RT1, flow switch S5, and level switch S4 to (continued) the power supply board at J2 and ultimately to the control/display... - Page 17 SERVICE MANUAL THEORY OF OPERATION Medi-Therm II 6.4.1 THERMISTOR Temperature measurement is achieved using 400 series thermistor beads located in the blanket water path (blanket water probe RT2), the cold water reservoir OUTPUT (cold water reservoir probe RT1), and in the patient via the patient probe jack J1. MEASUREMENT Under microprocessor U37 control, each of the three beads is connected to the current source circuitry (U38 and associated components) by a...
- Page 18 THEORY OF OPERATION SERVICE MANUAL Medi-Therm II 6.4.3 DISPLAY UPDATE All alarm and status indicators are lit by LED bars driven by inverter/driver IC’s: (continued) • The alarm latch U53 is the interface between the microprocessor and the ALERT, ADD WATER, CHECK PROBE, CHECK FLOW, REMOVE FROM USE NOW / MACHINE SHUTDOWN, SELECT, °F* and °C drivers via the data bus at address 0FFBFH.
- Page 19 SERVICE MANUAL THEORY OF OPERATION Medi-Therm II 6.4.5 BLANKET / PATIENT If the machine is in MANUAL mode, the blanket water temperature as sensed by the blanket water probe is used as the feedback signal for controlling the TEMPERATURE water temperature to the MANUAL mode set point temperature. CONTROL If the machine is in AUTO mode, the patient temperature as sensed by the patient probe connected to the patient probe jack is used as the feedback signal for...
- Page 20 THEORY OF OPERATION SERVICE MANUAL Medi-Therm II 6.4.6 COLD WATER The control latch U51 on the control/display board is the interface between the microprocessor (via the data bus at address 0FF7FH) and the refrigeration RESERVOIR compressor relay driver on the power supply board. A high signal on the TEMPERATURE appropriate data line causes a low signal at pin 6 of U51 on the control/display CONTROL...
- Page 21 SERVICE MANUAL THEORY OF OPERATION Medi-Therm II 6.4.7 BACK-UP WATER goes into a shutdown condition it also sends an output signal from port pin P3.4, through U40 of the control/display board, to command, via Q11, U4, and TEMPERATURE U6 on the power supply board, a REMOVE FROM USE NOW / MACHINE LIMITING SHUTDOWN condition.
-
Page 22: Functional Check, Safety Inspection, Preventive Maintenance
Notify the carrier at once and ask for an inspection (in writing). Failure to do this within 15 days may result in loss of claim. Do not return the machine to GAYMAR — call Gaymar's Technical Service Department for advice. Before placing the Medi-Therm II machine into service, perform a FUNCTIONAL CHECK AND SAFETY INSPECTION (pp. - Page 23 SERVICE MANUAL CLEANING PROCEDURES Medi-Therm II CLEANING Pump PROCEDURES Pump motor should be oiled once a year with 3-4 drops of general purpose motor oil in the locations identified on the pump label. (continued) Panel Exterior Clean the control panel and panel exterior with a cloth dampened with isopropyl alcohol.
-
Page 24: Functional Check & Safety Inspection
• Current Leakage Tester • Static Control Wrist Strap The GAYMAR MT590 Medi-Therm II Test Tool is a dedicated test tool available from Gaymar Industries. This tool was designed to allow for more convenient and safer testing of the high temp backup thermostats by... - Page 25 SERVICE MANUAL FUNCTIONAL CHECK & Medi-Therm II SAFETY INSPECTION 7.3 FUNCTIONAL CHECK & DANGER SAFETY INSPECTION Disconnect power before servicing unit. Risk of electrical shock. (continued) Follow the following procedures carefully, paying particular attention to test setups. Any deviation from the setups, procedures, or test equipment may result in incorrect or misleading results.
- Page 26 FUNCTIONAL CHECK & SERVICE MANUAL SAFETY INSPECTION Medi-Therm II 7.3 FUNCTIONAL CHECK & e) Condition of Lights and Alarm SAFETY INSPECTION Plug in the Medi-Therm II machine and turn it on. Press and hold the TEST LIGHTS button. The right and left halves of the display panel should (continued) light and blank alternately (along with the audible alarm).
- Page 27 SERVICE MANUAL FUNCTIONAL CHECK & Medi-Therm II SAFETY INSPECTION 7.3 FUNCTIONAL CHECK & h) Cold Water Reservoir Controller SAFETY INSPECTION To check the cold water reservoir controller, perform the following: (continued) 1. Fill machine with distilled water until green band on float stem is fully visible.
- Page 28 (actuation temperatures) of the machine’s high (continued) temperature backup thermostats. Steps 1-15, pp. 25-26, should be followed when a Gaymar MT590 Test Tool is available. For those facilities not having access to an MT590, follow steps 1A-20A, pp. 27-28. FROM MT590 TEST TOOL...
-
Page 29: High Temperature Limits
SERVICE MANUAL FUNCTIONAL CHECK & Medi-Therm II SAFETY INSPECTION 7.3 FUNCTIONAL CHECK & k) High Temperature Backup Thermostat Trip Temperatures SAFETY INSPECTION [MT590 Test Tool Procedure] (continued) WARNING • Changes to the wiring of the high temperature backup thermostats can defeat their operation. To verify thermostat operation, perform the Thermostat Verification Test described in section 7.3, item l, p. - Page 30 FUNCTIONAL CHECK & SERVICE MANUAL SAFETY INSPECTION Medi-Therm II 7.3 FUNCTIONAL CHECK & k) High Temperature Backup Thermostat Trip Temperatures SAFETY INSPECTION [MT590 Test Tool Procedure, cont'd.] (continued) 9. An LED should be lit on the face of the MT590 Test Tool to indicate an open S2 or S3 thermostat.
- Page 31 SERVICE MANUAL FUNCTIONAL CHECK & Medi-Therm II SAFETY INSPECTION 7.3 FUNCTIONAL CHECK & k) High Temperature Backup Thermostat Trip Temperatures SAFETY INSPECTION [Alternate Shorting Jumper Procedure] (continued) To measure trip points of the high temperature backup thermostats if you do not have access to an MT590 Test Tool, perform the following steps 1A-20A.
- Page 32 FUNCTIONAL CHECK & SERVICE MANUAL SAFETY INSPECTION Medi-Therm II k) High Temperature Backup Thermostat Trip Temperatures 7.3 FUNCTIONAL CHECK & [Alternate Shorting Jumper Procedure, cont’d.] SAFETY INSPECTION (continued) NOTE: If this is the second time the thermostat has tripped (i.e., if you have previously completed steps 12A to 18A), proceed to step 19A.
- Page 33 SERVICE MANUAL FUNCTIONAL CHECK & Medi-Therm II SAFETY INSPECTION 7.3 FUNCTIONAL CHECK & l) Thermostat Verification Test SAFETY INSPECTION WARNING (continued) Verify that the high temperature backup thermostats independently shut down the machine. Incorrect operation of these thermostats may result in death or serious injury.
- Page 34 FUNCTIONAL CHECK & SERVICE MANUAL SAFETY INSPECTION Medi-Therm II 7.3 FUNCTIONAL CHECK & m) Patient Temperature Display Test SAFETY INSPECTION To check the patient temperature display, perform the following: (continued) 1. Fill machine with distilled water until green band on float stem is fully visible.
- Page 35 The current leakage should not exceed 50 microamps. NOTE: If additional information is required, refer to AAMI American National Standard, Safe Current Limits for Electromedical Apparatus or contact Gaymar's Technical Service Department. q) Reset the RFU Code (not applicable to machines containing Version 1.0 software) The Medi-Therm II machine will retain the previously stored code.
- Page 36 SAFETY INSPECTION Medi-Therm II 7.3 FUNCTIONAL CHECK & This completes the recommended functional test and preventive maintenance procedures for the Gaymar Medi-Therm II. SAFETY INSPECTION (continued) If a machine passes all the requirements of paragraphs “a” through “q”, the machine should be considered operational and suitable for return to service.
-
Page 37: Inspection Form
SERVICE MANUAL INSPECTION FORM Medi-Therm II INSPECTION FORM Medi-Therm II Hyper/Hypothermia Functional Check / Inspection Form * Location ____________________________________________________ Serial number ___________________________________ Action Taken Item OK? (Y/N) Action needed (Date / Initials) a. Condition of chassis b. Condition of attachment plug c. -
Page 38: Troubleshooting & Service Modes
NOTE: Early model machines containing version 1.0 software do not have the RFU reset feature. If this feature is desired, contact Gaymar's Technical Service Department. An updated EPROM with this feature can be purchased and installed in older model machines. -
Page 39: Rfu Error Codes
SERVICE MANUAL SERVICE MODES Medi-Therm II SERVICE MODES (continued) † Table 2 - RFU Codes Troubleshooting Description Code Chart Reset code -- indicates no RFU condition recorded. None Measured blanket or reservoir probe value is out of the range 32°F to 122°F Figure 6B (0°C to 50°C). -
Page 40: Service Modes
SERVICE MODES SERVICE MANUAL Medi-Therm II Table 3 - Service Modes Service Mode 1: To access Press and hold S3 (see figure 5, p. 35) on the control/display board, then turn machine on. Uses • Verification of software version level. •... - Page 41 SERVICE MANUAL SERVICE MODES Medi-Therm II Table 3 - Service Modes (continued) Service Mode 3: To access Press AUTO button while in service mode 1. Uses To prewarm the machine for testing of high temperature thermostat S2 and S3 trip points. Description •...
-
Page 42: Troubleshooting Charts
TROUBLESHOOTING CHARTS SERVICE MANUAL Medi-Therm II TROUBLESHOOTING CHARTS IMPORTANT Whenever possible, perform the FUNCTIONAL CHECK AND SAFETY INSPECTION (see section 7.3) prior to troubleshooting machine. REMOVE FROM USE NOW / MACHINE SHUTDOWN condition Enter Service Mode 1-- See service mode section Observe RFU code... -
Page 43: Rfu Code 1
SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II RFU CODE 1 Run machine. If RFU condition (RFU Insure integrity of the control/display Measured values code 1) reappears, unplug machine from RT1 or RT2 board to power supply board and measure resistance between pins are not within connections. -
Page 44: Rfu Codes 2, 3, - , E, And L
RFU Code [–] RFU Code E RFU Code 2 RFU Code 3 RFU Code L Conversion Conversion CHECKSUM RAMTEST Failure Failure Failure Failure Microprocessor system failure. Contact GAYMAR Technical Services. Figure 6C—RFU Codes 2, 3, – , E, and L... - Page 45 SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II RFU CODE 4 RFU CODE 5 Compensation resistor 1 Compensation resistor 1 (R12 on (R12 on control/display board) control/display board) reading is too high reading is too low Measure R12 resistance. Is it 816 ohms Replace R12.
- Page 46 TROUBLESHOOTING CHARTS SERVICE MANUAL Medi-Therm II RFU CODE 6 RFU CODE 7 Compensation resistor 2 Compensation resistor 2 (R13 on (R13 on control/display control/display board) board) reading is too low . reading is too high. Measure R13 resistance. Is it 7320 ohms Replace R13.
-
Page 47: Rfu Code 8
SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II RFU CODE 8 Blanket probe reading faulty Insure integrity of control/display Is it Suspect board to power supply board between temperature connections. Insure integrity of 811 and 7355 measurement base to power supply board ohms circuitry. -
Page 48: Rfu Code 9
TROUBLESHOOTING CHARTS SERVICE MANUAL Medi-Therm II RFU CODE 9 Reservoir probe reading faulty Insure integrity of control/display Is it Suspect board to power supply board between temperature connections. Insure integrity of 811 and 7355 measurement base to power supply board ohms circuitry. - Page 49 SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II [This page has been intentionally left blank.]...
-
Page 50: Rfu Code H
SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II Figure 6H—RFU Code H, Page 1 of 2... -
Page 51: Rfu Code H
SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II Figure 6H—RFU Code H, Page 2 of 2... -
Page 52: Check Water Flow Alert Is On
SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II CHECK WATER FLOW Check Adjust setpoint alert is on. Check/suspect hot solenoid SV2 to insure HEAT solenoids. (it should be LED is on energized). hoses Connect connected properly hoses (one to SUPPLY, one properly. to RETURN) Is a steel object attracted to center top of... -
Page 53: Check Water Flow Alert Is On
Q8 triac is also damaged. Repair/replace power supply Is a steel object board. attracted to center top of the valve? Call impeller Is SV1 coil GAYMAR broken or energized? Technical cracked Service Repair/replace cold Replace solenoid SV1. impeller. Repair/replace cold solenoid... - Page 54 SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II PUMP MOTOR NOT RUNNING Verify unit is in AUTO or MANUAL modes. Line voltage at Repair/ terminals 6 replace and 8 of pump. TB1? Suspect Line base-to-power voltage at supply board output of connection. Repair.
- Page 55 SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II [This page has been intentionally left blank.]...
-
Page 56: Pump Motor Not Running
SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II Select MANUAL mode. Connect If thermometer in BLANKET WON’T blanket display Adjust setpoint to 41°C. test setup TPT9 contradicts HEAT IN AUTO OR within 1°C of Allow machine time to as shown this, suspect RT2. setpoint MANUAL MODE heat (30 minutes max.) - Page 57 SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II there adequate flow? Check heater "CHECK WATER (it should be on) FLOW alert is on" (figure 6I) Measure resistance Line of heater. Refer to voltage at power supply board terminals 11 Check schematic (fig. 21) and 8 of cold solenoid SV1 TB1?
-
Page 58: Blanket Will Not Cool
SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II Figure 6L—Blanket Will Not Cool, Page 1 of 3... - Page 59 SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II Figure 6L—Blanket Will Not Cool, Page 2 of 3...
-
Page 60: Blanket Will Not Cool
SERVICE MANUAL TROUBLESHOOTING CHARTS Medi-Therm II from Jumper Suspect "BLANKET WILL relay K1 contacts, compressor unit NOT COOL" (pin 6 to pin 9, (figure 6L, starter relay. and pin 4 to pin 7). page 1 of 3) Replace. Suspect See power supply compressor unit compressor thermal overload. -
Page 61: Repair Procedures
If you are still unable to identify the refrigerant type, contact Gaymar’s Technical Service Department for assistance. Refer to the appropriate section (9.1.1 or 9.1.2, p. 58) for charging... - Page 62 Using other refrigerants or oils will damage the compressor. • For refitting options approved for the Medi-Therm II, please contact Gaymar’s Technical Service Department. • The following values apply when the water temperature in the reservoir reaches 40°F (4.4°C), with the wraparound off, at a 72°F (22.2°C) ambient: R-12 charge ......
- Page 63 R-12. (continued) • Prior to charging the system, Gaymar recommends evacuating the system to below 500 microns. Then, perform a vacuum decay test to assure there is not a large differential between the system and the vacuum pump. After 5 minutes, the system should still be at 500 microns or below.
-
Page 64: Replacing The Power Supply Board
REPAIR PROCEDURES SERVICE MANUAL Medi-Therm II REPLACING THE CAUTION POWER SUPPLY BOARD Wear a static control device connected to the chassis ground to prevent electrostatic discharge. (See figure 5, p. 35.) Electrostatic discharge can damage circuitry on PC boards. The following procedures describe replacement of the power supply board. A digital voltmeter is required. -
Page 65: Replacing The Control/Display Board
SERVICE MANUAL REPAIR PROCEDURES Medi-Therm II REPLACING THE CAUTION CONTROL/DISPLAY Wear a static control device connected to the chassis ground to BOARD prevent electrostatic discharge. (See figure 5, p. 35.) Electrostatic discharge can damage circuitry on PC boards. Control/Display Board Removal (refer to figure 8, p. 67): 1. -
Page 66: Replacing The Top Cover
REPAIR PROCEDURES SERVICE MANUAL Medi-Therm II REPLACING THE 4. Insert patient probe assembly into mounting hole and fasten with hex nut. Insure patient probe assembly is oriented so that the bevelled corner of the CONTROL/DISPLAY probe assembly is positioned as shown in figure 16, p. 76. BOARD 5. -
Page 67: Cleaning The Flow Switch
SERVICE MANUAL REPAIR PROCEDURES Medi-Therm II CAUTION Do not bend or alter terminals. Terminals may break. Also, bending may alter the trip point range. 9. Mount thermostat, using existing screws. 10. Reapply insulating material. 11. Perform the FUNCTIONAL CHECK AND SAFETY INSPECTION (section 7.3). CLEANING THE To clean the flow switch (see figure 7 below and figure 15, pp. -
Page 68: Replacement Parts
(See p. 86, figure B.) See figure 25, p. 86 for complete repackaging instructions to ship the Medi-Therm II machine back to Gaymar or to a qualified Service Center. If you do not have the original packing materials, please contact Gaymar's Technical Service Department and a complete Customer Return Kit will be sent to you. -
Page 69: Reference Tables
SERVICE MANUAL REFERENCE TABLES Medi-Therm II 10.0 REFERENCE TABLES 10.1 CELSIUS-FAHRENHEIT CONVERSION °C °F °C °F °C °F °C °F 32.0 11.5 52.7 23.0 73.4 34.5 94.1 32.9 12.0 53.6 23.5 74.3 35.0 95.0 33.8 12.5 54.5 24.0 75.2 35.5 95.9 34.7 13.0... -
Page 70: Temperature Vs. Resistance
REFERENCE TABLES SERVICE MANUAL Medi-Therm II 10.2 TEMPERATURE vs. RESISTANCE PATIENT PROBE, BLANKET WATER PROBE (RT2), AND RESERVOIR PROBE (RT1) TEMPERATURE RESISTANCE TEMPERATURE RESISTANCE TEMPERATURE RESISTANCE °C °F (OHMS) °C °F (OHMS) 32.0 7355 78.8 2156 33.8 6989 80.6 2064 35.6 6644 82.4... -
Page 71: 11.0 Service Information
SERVICE INFORMATION SERVICE MANUAL Medi-Therm II 11.0 SERVICE INFORMATION GROUND HARNESS P4 at J4 P5 at J3 PATIENT PROBE ASSEMBLY P3 at J4 P2 at J2 CONTROL DISPLAY POWER BOARD SUPPLY BOARD CABLE ASSEMBLY 26 CONDUCTOR P6 at J2 P1 at J1 GROUND CHASSIS P7 at J1... - Page 72 SERVICE MANUAL SERVICE INFORMATION Medi-Therm II In-Temp Flow-OK Heat Cool STATUS: ALERT MODE SELECT TEMPERATURE TO CONTROL BLANKET TEMPERATURE: °C CONNECT BLANKET(S) CHECK WATER FLOW PRESS MANUAL BUTTON °F MANUAL SET DESIRED BLANKET TEMP. CHECK PATIENT PROBE Blanket Patient ADD WATER °C/°F TO CONTROL PATIENT TEMPERATURE: CONNECT BLANKET(S)
-
Page 73: Operator Controls/Indicators
SERVICE MANUAL SERVICE INFORMATION Medi-Therm II Item Name Function FLOW-OK Indicates blanket water is flowing adequately. HEAT Indicates blanket water is being heated. Refer to section 4.2 THERMAL SPECIFICATIONS, p..5 IN-TEMP Indicates the Medi-Therm II is controlling temperature at the desired setting. COOL Indicates blanket water is being cooled. -
Page 74: Heating Flow Diagram
SERVICE INFORMATION SERVICE MANUAL Medi-Therm II When the Medi-Therm II machine is heating, water flows in the path shown below. Figure 10—Heating flow diagram When the Medi-Therm II machine is cooling, water flows in the path shown below. Figure 11—Cooling flow diagram... -
Page 75: Refrigeration Flow Diagram
SERVICE MANUAL SERVICE INFORMATION Medi-Therm II LOW PRESSURE GAS COLD TANK PROBE ASSEMBLY (RT1) LOW SIDE (SUCTION) SERVICE VALVE EVAPORATOR COIL LOW PRESSURE LIQUID CAPILLARY TUBE HERMETIC COMPRESSOR CONDENSER CONDENSER FLOW FILTER DRIER HIGH SIDE SERVICE VALVE HIGH PRESSURE LIQUID HIGH PRESSURE GAS Figure 12—Refrigeration flow diagram... -
Page 76: Test Setup
SERVICE INFORMATION SERVICE MANUAL Medi-Therm II ® Figure 13—Test setup... -
Page 77: Machine Disassembly
SERVICE MANUAL SERVICE INFORMATION Medi-Therm II ® Figure 14—Machine disassembly... -
Page 78: Parts Diagram (Base)
SERVICE MANUAL SERVICE INFORMATION Medi-Therm II Figure 15—Parts Diagram (Base) -
Page 79: Parts List (Base)
SERVICE MANUAL SERVICE Medi-Therm II INFORMATION PART NUMBER ITEM DESCRIPTION MTA5942 MTA5900 MTA5901 COMPRESSOR 07948-000 07948-000 07948-000 A. CAPACITOR, START - FOR UNITS WITH RING TERMINALS 90701-138 90701-138 CAPACITOR, START - FOR UNITS WITH PUSH ON TERMINALS 90701-140 90701-140 90701-140 B. -
Page 80: Parts List (Head)
SERVICE MANUAL SERVICE INFORMATION Medi-Therm II Flow-OK Heat In-Temp Cool STATUS: ALERT MODE TEMPERATURE SELECT TO CONTROL BLANKET TEMPERA TURE: °C CONNECT BLANKET(S) CHECK WATER FLOW PRESS MANUAL BUTTON °F MANUAL SET DESIRED BLANKET TEMP. CHECK PATIENT PROBE Blanket Patient ADD WATER TO CONTROL PATIENT TEMPERATURE: °C/°F... -
Page 81: Original Thermostat Wiring Diagram
SERVICE MANUAL SERVICE Medi-Therm II INFORMATION SECTION A-A TERMINAL BLOCK TB1 NOTE: Positions 8 and 9 of TB1 are connected together. Figure 17—Original Thermostat Wiring Diagram for MTA5900/MTA5901 SECTION A-A TERMINAL BLOCK TB1 NOTE: Positions 8 and 9 of TB1 are connected together. - Page 82 SERVICE MANUAL Medi-Therm II [This page has been intentionally left blank.]...
- Page 83 MEDI-THERM II IS MADE IN THE USA...
Need help?
Do you have a question about the MEDI-THERM II MTA5900 Series and is the answer not in the manual?
Questions and answers