CSZ MICRO-TEMP LT 749 User manual

MICRO-TEMP LT
Operation and Technical Manual
Model 749 Localized Therapy Units
Cincinnati Sub-Zero Products, Inc. •12011 Mosteller Road •Cincinnati, Ohio 45241, U.S.A.
www.cszmedical.com
In Europe: •CEpartner4U •Esdoornlaan 13, 3951 DB Maarn.
The Netherlands
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II
MICRO-TEMP LT Symbols / Definitions
CAUTION
Temperature Set
Risk of Explosion:
Do not use in the
Presence of Flammable
Anesthetics
Danger; Risk of
Electric Shock
Disconnect Power
Before Servicing
Increasing
Temperature
Decreasing
Temperature
Water
Temperature
Temperature Set
Point Indicator
OFF / ON Switch
AC Voltage
Low Water
Level
Power Failure
Attention: Read
Operation Instructions
and Manual Before
Operating
Separate collection for
electrical and electronic
equipment
Type B
Equipment ESD
Susceptibility
Fuse
~
O / I
Equipotentiality
Earth (Ground)

III
MICRO-TEMP LT
OPERATION AND TECHNICAL MANUAL
Cincinnati Sub-Zero Products, Inc., reserves the right to make equipment changes and improvements, which
may not be reflected in this manual.
Manual 57203 Rev. I
DCN: M006-3983
WARNING
•Read Operation Manual before operating.
•A physician's order is required for setting pad temperature and use of equipment. As
directed by physician, check patient's temperature and skin condition of areas in contact
with pad. Check the pad water temperature. Pediatric patients, temperature-sensitive
patients with vascular disease, surgical patients, diabetics, and Raynauds disease patients
should be checked more frequently. Notify the physician promptly of any change in
patient status in order to avoid serious injury or death. Failure to inform the
physician of any deviation may result in injury to the patient.
Pediatrics – Infants and children’s body temperature are more responsive to
surface heating than adults. Due to their size, the effect of heating a child is more
pronounced because of their higher ratio of skin contact area to body mass.
Temperature Sensitive Patients – Patients with impaired peripheral blood
circulation and patients who are incapacitated may be more sensitive to
temperature changes than patients with normal circulation.
Surgical Patients – Patients with poor circulation due to inadequate heart function,
loss of blood, or impaired peripheral blood circulation may be more sensitive to
temperature changes.
•If device is used at home, patient must follow directions prescribed by their
physician and be aware of all warnings and cautions mentioned throughout the manual.
•Observe patient’s skin condition frequently due to individual differences in
sensitivity and susceptibility to injury from heat and/or externally applied chemicals
or pressure. Patients at greatest risk are those unconscious, on prolonged therapy,
diabetics, children, and persons incapacitated, with sensitive skin areas, or poor
circulation.
•Do not use for ECMO (Extracorporeal Membrane Oxygenation) therapy.
•Heating may affect toxicity of certain prep solutions which has been reported to
cause skin injury when remaining on patient’s skin during application of prolonged
heat. For moist heat therapy, moisten the pad using distilled water only.
•The method of temperature control provided by all localized heat therapy units presents the
danger of heating body tissues, particularly the skin, to a point where they are injured, i.e.,
burns. Depending on the extent and severity of a burn, very serious complications may
arise.
•Prevent excessive and/or prolonged tissue pressure and shearing forces, especially over
bony prominences, to prevent skin damage that may result.
•Do not wrap pad so tightly as to constrict blood flow. Do not use pins to secure pad
or hoses. Do not allow pad or hoses to come in contact with any sharp object.
•Do not place additional heat sources between the patient and pad. Skin damage may
result.

IV
WARNING
•Proper sanitation procedures must be practiced and hygienic safety must be
maintained, to prevent contamination. Contamination can affect patient’s health, i.e. skin
irritation/rash may result.
•Any time water is found leaking into or around the unit, connecting hose, and/or pad, turn
the unit off, disconnect the power cord from its power source, and correct the problem
before proceeding. Water leaks could lead to electric shock.
•Water leaks present a risk of infection and should be handled accordingly. Proper
sanitation procedures should be followed including, but not limited to, the preventative
maintenance described in this manual. Leaky pads or hoses, as well as unapproved
pads should never be used.
•Do not use the MICRO-TEMP LT system in the presence of flammable anesthetics. Risk of
explosion can result.
•For continued protection against risk of fire, replace only with same type and rating of
fuse.
•This device is still energized when the inlet switch is in the off position. To completely
disconnect the device from the power source, remove the appliance plug from the back of
the unit.
•Always unplug the unit before accessing internal components during service. Failure to
unplug the unit could result in electric shock.
•Do not by-pass ground on power cord plug. Electrical Hazards may result.
•Do not position unit near any objects that can generate a strong electrical/magnetic field.
Potential electromagnetic interference may result. If interference is observed, re-locate
the unit away from such devices.
•The display may blank momentarily during an electrostatic discharge event, but the
essential performance of the unit is not affected and no harm will occur to the patient. If an
electrostatic discharge event occurs, check to see if unit is operating properly. If unit does
not return to previous operation, turn unit off then back on and reset temperature settings
as prescribed.
•Keep air vents free of debris and obstruction. Blockage of vents could result in the unit
overheating which could render the unit unable to provide adequate therapy and
excessive surface temperatures could cause injury of patient or operator. Keep unit,
specifically the air vents, away from curtains or other obstructions.
•Remove the MICRO-TEMP LT from service if the outer casing or membrane control panel is
cracked or internal components are exposed. Contact with internal components could
result in electric shock or thermal injury to the patient or operator and exposure to
sharp edges.
•Before returning the MICRO-TEMP LT to patient use after repairs, the MAINTENANCE
CHECKLIST in Section 4 must always be performed. Improper repair and inadequate
maintenance can result in system damage and patient injury.
•The repair, calibration, and servicing of the MICRO-TEMP LT should be performed by
qualified Medical Equipment Service Technicians, Certified Biomedical Electronics
Technicians, or Certified Clinical Engineers familiar with good repair practices for servicing
medical devices, and in accordance with instructions contained in this manual. Improper
repair can result in system damage and patient injury.

V
MICRO-TEMP LT, MAXI-THERM®, MAXI-THERM LITE®, and TEMP-PAD® are registered
trademarks of Cincinnati Sub Zero Products, Inc., Cincinnati, Ohio USA.
©Copyright 1982, Cincinnati Sub-Zero Products, Inc. All rights reserved.
CAUTION
•Always drain the MICRO-TEMP LT to a sanitary drain because bio-contaminants may
be present in the unit’s water supply.
•Do NOT fill the reservoir to the bottom of the strainer if there is water in the pad.
This could cause an overflow when the unit is turned on.
•Working with electronic boards, plugs, and cables requires delicate handling. Proper
Electrostatic Discharge procedure should be followed during replacement of any
electronic board.
•Use only CSZ provided hospital grade power cord assembly and used in
conjunction with a properly grounded receptacle or electric shock may result.
•Do not operate pump without a pad connected or with pad clamps in the “CLOSED”
position. Always check clamps to make sure they are fully open.
•Full or partial covering of pads with materials with high insulative properties (pillows, etc.)
could cause excessive retention of heat in the patient leading to injury.
•The pad surface should be checked for freedom from mechanical damage prior to each
application.
•Complete folding of pad may restrict flow and reduce therapy to patient.
•Make sure hose and pads are free of kinks that might restrict flow.
•Check hose couplings to be certain they are properly locked together.
•Follow pad instructions and Hospital/Physician instructions for applying, storing, and
disposal of product.
•Do not use alcohol. Alcohol may cause pad and unit deterioration.
•Use distilled water only. Do Not Use De-Ionized water or tap water. Failure to use
distilled water may result in poor performance and damage to the Micro-Temp LT.
•It is recommended that two (2) ounces of Propylene Glycol be added to the reservoir
upon fill up.

VI
TABLE OF CONTENTS
TECHNICAL HELP ...................................................................................................................................................1
AUTHORIZED EUROPEAN REPRESENTATIVE: ..............................................................................................1
BEFORE YOU CALL FOR SERVICE..........................................................................................................................1
IN-WARRANTY REPAIR AND PARTS .....................................................................................................................1
RECEIVING INSPECTION.......................................................................................................................................1
IMPORTANT SAFETY INFORMATION...............................................................................................................1
SECTION 1. INTRODUCTION................................................................................................................................2
1-0. GENERAL SAFETY PRECAUTIONS ..........................................................................................................2
1-1. GENERAL DESCRIPTION OF THIS MANUAL..........................................................................................2
1-2. GENERAL DESCRIPTION OF THE MICRO-TEMP LT SYSTEM .............................................................2
1-3. CLINICAL APPLICATIONS .........................................................................................................................3
1-4. PHYSICAL DESCRIPTION OF THE MICRO-TEMP LT UNIT...................................................................3
1-4.1. EXTERNAL FEATURES - FRONT VIEW.......................................................................................3
1-4.2. EXTERNAL FEATURES - REAR VIEW .........................................................................................5
1-4.3. EXTERNAL FEATURES – MEMBRANE CONTROL PANEL....................................................7
1-5. REQUIRED ACCESSORIES................................................................................................................................9
1-6. FUNCTIONAL DESCRIPTION OF THE MICRO-TEMP LT SYSTEM.......................................................9
1-6.1. THEORY OF OPERATION...............................................................................................................9
1-6.2. HEATING SYSTEM..........................................................................................................................9
1-6.3. CIRCULATING SYSTEM.................................................................................................................9
1-6.4. TEMPERATURE SAFETY CONTROL SYSTEM.........................................................................10
SECTION 2. GENERAL PREPARATION OF THE MICRO-TEMP LT SYSTEM ........................................11
2-1. INTRODUCTION.........................................................................................................................................11
2-2. UNPACKING THE SHIPMENT..................................................................................................................11
2-3. FIRST TIME SET-UP/SYSTEM TEST ROUTINE......................................................................................11
2-3.1. INSPECTING AND ARRANGING THE EQUIPMENT ................................................................11
2-3.2. COMPLETING A SYSTEM TEST ROUTINE ...............................................................................12
2-5. PATIENT PREPARATION AND BEDSIDE CARE....................................................................................14
SECTION 3. OPERATING THE MICRO-TEMP LT UNIT...............................................................................17
3-1. INTRODUCTION.........................................................................................................................................17
3-2. ARRANGING THE SYSTEM COMPONENTS ..........................................................................................17
3-3. OPERATING THE MICRO-TEMP LT ........................................................................................................19
3-4. CONCLUDING LOCALIZED HEAT THERAPY TREATMENT ..............................................................20
3-5. STATUS DISPLAY AND ALARM MESSAGES ........................................................................................20
SECTION 4. GENERAL MAINTENANCE OF THE MICRO-TEMP LT SYSTEM.......................................23
4-1. INTRODUCTION.........................................................................................................................................23
4-1.1. TEST EQUIPMENT REQUIRED.............................................................................................23
4-2. MAINTENANCE OF THE WATER RESERVOIR......................................................................................25
4-2.1. DRAINING THE RESERVOIR.......................................................................................................25
4-2.2. REPLENISHING THE RESERVOIR ..............................................................................................25
4-2.3. DISINFECTION/DRY STORAGE PROCEDURE FOR CIRCULATING WATER UNITS........26
4-3. MAINTENANCE OF THE MICRO-TEMP LT EXTERIOR –CLEANING INSTRUCTIONS..................28
4-4. DISPOSAL OF THE LOCALIZED HEAT THERAPY PADS.....................................................................28
4-5. CURRENT LEAKAGE TEST ......................................................................................................................28
4-6. GROUND CONTINUITY TEST..................................................................................................................29
4-7. FLOW RATE TEST......................................................................................................................................29
4-8. >1°C (2°F) OVER SET POINT CHECK.......................................................................................................30
4-9. TEMPERATURE ACCURACY CHECK.....................................................................................................30
4-10. HIGH LIMIT SAFETY CHECK...................................................................................................................31
4-11. LOW WATER ALARM CHECK..................................................................................................................31
4-12. POWER FAILURE ALARM CHECK..........................................................................................................32
4-13. TILT SWITCH ALARM CHECK.................................................................................................................33

VII
SECTION 5. FIELD REPAIR/SERVICE OF THE MICRO-TEMP LT UNIT .................................................34
5-1. INTRODUCTION.........................................................................................................................................34
5-2. ACCESS TO THE INTERIOR OF THE MICRO-TEMP LT UNIT ...................................................................36
5-2.1. SEPARATING THE FRONT AND REAR ENCLOSURES............................................................36
5-2.2. RECONNECTING THE FRONT AND REAR ENCLOSURES .....................................................36
5-2.3. DISCONNECTING THE CABLES FROM THE CONTROL BOARD..........................................37
5-2.4. DISCONNECTING THE CABLES FROM THE DISPLAY BOARD............................................37
5-3. REPLACEMENT OF THE HEATER.................................................................................................................38
5-4. REPLACEMENT OF THE PUMP .....................................................................................................................39
5-5. REPLACEMENT OF THE RESERVOIR..........................................................................................................40
5-6. REPLACEMENT OF THE TWIN BLACK TUBING........................................................................................41
5-7. REPLACEMENT OF THE WATER TEMPERATURE SENSOR (THERMISTOR)........................................41
5-8. REPLACEMENT OF THE I/O POWER SWITCH............................................................................................43
5-9. REPLACEMENT OF FUSES IN THE I/O POWER SWITCH.....................................................................44
5-10. REPLACEMENT OF THE WATER LEVEL SENSOR ASSEMBLY.............................................................45
5-11. REPLACEMENT OF THE CONTROL BOARD AND/OR DISPLAY BOARD AND/OR THE
MEMBRANE CONTROL PANEL.............................................................................................................................45
5-12. TROUBLESHOOTING GUIDE...................................................................................................................48
SECTION 6. PARTS INFORMATION..................................................................................................................53
6-1. INTRODUCTION...............................................................................................................................................53
6-2. ORDERING INFORMATION FOR REPLACEMENT PARTS........................................................................53
6-3. RECOMMENDED REPLACEMENT PARTS INVENTORY...........................................................................53
6-4. RETURNING PARTS UNDER WARRANTY..................................................................................................54
6-5. SHIPPING PARTS.............................................................................................................................................54
SECTION 7. SPECIFICATIONS AND CERTIFICATIONS OF THE MICRO-TEMP LT.............................61
TABLE OF FIGURES
Figure 1-1. Micro-Temp LT Unit - Front View.......................................................................................................4
Figure 1-2. Micro-Temp LT - Rear View................................................................................................................. 6
Figure 1-3. Micro-Temp LT – Membrane Control Panel (100/115V) ..................................................................8
Figure 1-4. Micro-Temp LT – Membrane Control Panel (230/240V) ..................................................................8
Figure 4-1. Maintenance Checklist..........................................................................................................................24
Figure 5-1. Micro-Temp LT Unit - Exposed Rear View.......................................................................................35
Figure 6-1. Micro-Temp LT Unit - Internal Exploded - Front View ..................................................................55
Figure 6-2. Parts List A.............................................................................................................................................55
Figure 6-3. Micro-Temp LT - Internal Exploded Rear View...............................................................................56
Figure 6-4. Parts List B.............................................................................................................................................56
Figure 6-5. Micro-Temp LT Unit – Reservoir - Side View...................................................................................57
Figure 6-6. Parts List C.............................................................................................................................................57
Figure 6-7.A Electrical Wiring Diagrams – 100V & 115V......................................................................................58
Figure 6-7.B Electrical Wiring Diagram – 230/240V...............................................................................................59
Figure 6-8. Micro-Temp LT Accessories..........................................................................................................60
Table 7-1. Guidance and Manufacturer’s Declaration – Electromagnetic Emissions for Micro-Temp
LT............................................................................................................................................................63
Table 7-2. Guidance and Manufacturer’s Declaration – Electromagnetic Immunity for Micro-Temp
LT.....................................................................................................................................................63
Table 7-3. Guidance and Manufacturer’s Declaration – Electromagnetic Immunity for Micro-Temp LT
that is Not Used for Life Support.......................................................................................................64
Table 7-4. Recommended Separation Distances Between Portable and Mobile RF Communications
Equipment and the Micro-Temp LT.............................................................................................65

1
TECHNICAL HELP
United States and Canada Telephone [phone]
Cincinnati Sub-Zero Products, Inc. Toll Free 1-800-989-7373
12011 Mosteller Road Fax [phone]
Cincinnati, OH 45241
Authorized European Representative:
CEpartner4U Telephone +31 (0) 6-
516.536.26
Esdoornlaan 13
3951 DB Maarn
The Netherlands
BEFORE YOU CALL FOR SERVICE
To help us better serve you, please have the serial number of your MICRO-TEMP LT unit
ready when you call for parts or service.
IN-WARRANTY REPAIR AND PARTS
All parts on your MICRO-TEMP LT unit are covered by a one year warranty (parts and labor
if returned to CSZ). To return defective parts or units, first obtain a Returned Materials
Authorization (RMA) number from our Medical Technical Service department.
RECEIVING INSPECTION
After unpacking the MICRO-TEMP LT System, be sure to inspect the system for concealed
damage. Retain all packing material and carefully describe or photograph any damage.
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 equipment to Cincinnati Sub-Zero. Call
our Medical Technical Service department for further instructions.
IMPORTANT SAFETY INFORMATION
Refer to this manual for instructions and caregiver information. Read and understand all
precautionary information before using, prescribing, or servicing the MICRO-TEMP LT unit.

INTRODUCTION MICRO-TEMP LT, Model 749
OPERATION AND TECHNICAL MANUAL
2
SECTION 1. INTRODUCTION
1-0. GENERAL SAFETY PRECAUTIONS
To provide the patient maximum safety during the use of the MICRO-TEMP LT localized heat
therapy system, a thorough knowledge and understanding of the system and its correct
application and operating use are required. Each person who is responsible for use or direction
of use of the system, such as physicians, nurses, technicians and operators must read and
understand this operating manual and all precautions and warnings prior to use. It is
recommended this manual be reviewed at least semi-annually as a refresher to ensure safe
operation and application. For proper knowledge and understanding, health care facility in-
service is available upon request.
1-1. GENERAL DESCRIPTION OF THIS MANUAL
This manual describes the operation, maintenance, and service of the CSZ MICRO-TEMP LT
localized heat therapy system. Section One describes the physical and functional characteristics
of the MICRO-TEMP LT System. Section Two explains how to prepare the MICRO-TEMP LT unit
for general use. Section Three expresses how to operate the unit. Section Four describes the
regular maintenance of the MICRO-TEMP LT unit. Section Five explains Field Repair and Service
of the MICRO-TEMP LT unit and contains a troubleshooting guide. Section Six outlines parts
information, and Section Seven lists the specifications of the MICRO-TEMP LT.
All individuals who use, operate, or service the unit should be familiar with all parts of this
manual. However, Sections One and Two are primarily intended for personnel who unpack and
setup the unit. Section three is primarily intended for personnel who operate the unit, and
Sections Four through Six are primarily intended for personnel who service and repair the unit.
Section (1-4) describes the external features of the MICRO-TEMP LT and Section (3-5)
describes the alarm messages.
1-2. GENERAL DESCRIPTION OF THE MICRO-TEMP LT SYSTEM
The CSZ MICRO-TEMP LT (Model 749) Localized Heat Therapy System is used to raise a
patient's body part temperature and/or maintain a desired patient body part temperature through
conductive heat transfer. The CSZ MICRO-TEMP LT unit is intended for continuous operation
and is composed of a heater, a circulating pump, and a microprocessor. This unit requires no
field adjustments or calibrations in order to maintain the precise board measurement of
temperature and temperature limits.
Distilled water is heated and pumped from the unit to a thermal pad. The pad
1
rests under, on top
of, or wrapped around the desired area on the patient (i.e. leg, arm, etc.) and is designed so that
the water circulates through the pad and returns to the unit.
1
The recommended pad(s) for use are described in Section 1-5.

INTRODUCTION MICRO-TEMP LT, Model 749
OPERATION AND TECHNICAL MANUAL
3
The Micro-Temp LT is intended for use in ambient temperatures of 20°C – 35°C (68°F – 95°F).
The maximum contact surface temperature at the pad is 42°C (107°F).
1-3. CLINICAL APPLICATIONS
The MICRO-TEMP LT unit is used primarily in hospitals, in home environments (if prescribed by a
doctor), and in veterinarian offices.
Medically this system can be used to increase the rate of circulation, and treat skin trauma (i.e.
bruises, contusions, abscesses, boils, and burns), inflammation and other medical problems like
infection, phlebitis, I.V. infiltration, and neuritis. It can also be used in orthopedic conditions to
treat lower back pain, strains, acute injuries, chronic pain, muscle spasm, tendonitis and arthritis.
1-4. PHYSICAL DESCRIPTION OF THE MICRO-TEMP LT UNIT
See Section (7) for specifications and certifications of the MICRO-TEMP LT.
1-4.1. EXTERNAL FEATURES - FRONT VIEW
The external features in Figure (1-1) of the MICRO-TEMP LT unit are described as follows:
A. The membrane on the front of the unit allows the user to change the temperature of
the water flowing through the thermal pad. It displays error messages and sounds
an alarm if there is a problem with the device. Refer to Section (1-4.3) for a list of
controls on the membrane. Refer to Section (3-5) for a list of possible display
messages and alarms.
B. The air vents, on both the top and bottom of the unit, provide air circulation for the
control board.
C. The built in handle permits the operator to grip and pick up the unit when moving it.
D. The sight window allows the operator to visually see how much water is in the
reservoir.
E. The permanently attached hose connects the unit and the thermal pad.
F. The four rubber suction cups on the bottom of the unit prevent the unit from tipping.
G. The coupling attached to the end of the twin black tubing allows a quick disconnect
for the heat therapy pad.