Gaymar MEDI-THERM III User manual

MEDI-THERM ®III
HYPER/HYPOTHERMIA MACHINE
REF MTA7912
P/N 100909000 Rev B 11/09
SERVICE MANUAL
MANUA
L
Flow-OK

MTA7912 Service Manual
Important
• Refer to the Medi-Therm®III Operator’s Manual for detailed
operating instructions. Read and understand the Operator’s
Manual and all precautions prior to using the Hyper/
Hypothermia machine.
• Review the SAFETY PRECAUTIONS (see page 1) prior to
servicing the Medi-Therm III machine.
• For technical assistance, contact your local dealer.
Receiving Inspection
Upon receipt, unpack the Medi-Therm III machine. Save all
packing material. Perform a visual and mechanical inspection for
concealed damage by removing the wraparound from the chassis
(see gure 18, page 57). If any damage is found, notify the carrier
at once and ask for a written inspection. Photograph any damage
and prepare a written record. Failure to do this within 15 days
may result in loss of claim.
Refer to section 2.0 of this Medi-Therm III Service Manual for
additional details.
IMPORTANT
Before operating the Medi-Therm III machine, remove the
compressor shipping braces. See p. 74, gure B, items 8 and 9.
Temporarily remove the power cord retainer (g. 19, p. 58, item 6)
and install the power cord. Reattach the power cord retainer.
Before you begin . . .
Gaymar®and Clik-Tite® are registered in the U. S. Patent and Trademark Ofce.
Gaymar®, Clik-Tite®, and Medi-Therm®are trademarks of Gaymar Industries, Inc.
© 2009. Gaymar Industries, Inc. All rights reserved.
Table of Contents
1.0 Safety Precautions.................................... 1
2.0 Repair Policy............................................. 2
3.0 Specications............................................ 3
4.0 Blankets/Body Wraps/Accessories........... 6
5.0 Operator Control Panel............................. 8
6.0 Theory of Operation................................ 10
7.0 Functional Check, Safety Inspection,
and Preventive Maintenance .................. 17
8.0 Service Modes and Troubleshooting ...... 23
9.0 Repair Procedures.................................. 47
10.0 Service Information................................. 52
Figures
1 Water Warm-up Rate................................ 4
2 Water Cooldown Rate............................... 4
3 Disposable Probe/Reusable Cable........... 6
4 Medi-Therm III System ............................. 7
5 Medi-Therm III Control Panel.................... 9
6 Probe Check Well................................... 18
7 Functional Check/Inspection Form ......... 22
8 Initiating Service Mode 1 ........................ 23
9 RFU Codes............................................. 24
10A-N Troubleshooting Charts ..................... 27-46
11 Connecting Terminal Block Wires........... 49
12 Flow Switch............................................. 51
13 Temperature vs. Resistance Table.......... 52
14 Circuit Boards/Connectors (Head).......... 53
15A/B Heating Flow; Cooling Flow.................... 54
16 Refrigeration Flow Diagram.................... 55
17A/B Test Setup; Test Setup (alternate)........... 56
18 Machine Disassembly............................. 57
19 Parts Diagram (Base), Parts List ............ 58
20 Parts Diagram (Head), Parts List............ 60
21 Thermostat Wiring Diagram.................... 61
22 Control/Display Board, Parts List............ 62
23 Power Supply Board, Parts List.............. 64
24 Alarm/Backup Board, Parts List.............. 66
25 Wiring Diagram [foldout] ......................... 68
26 Power Supply Board Schematic,
1 of 4 [foldout]......................................... 69
27A Control Display Board Schematic,
2 of 4 [foldout]......................................... 70
27B Control Diplay Board Schematic,
3 of 4 [foldout]......................................... 71
28 Alarm/Backup Board Schematic,
4 of 4 [foldout]......................................... 72
29 Block Diagram [foldout]........................... 73
30 Shipping Instructions [foldout]................. 74

MTA7912 Service Manual
1.0 Safety Precautions
Review the following safety precautions prior to testing the
Medi-Therm III machine:
Risk of electric shock. Refer servicing
to qualied medical equipment service
personnel.
• Repairs should be performed only by qualied medical
equipment service personnel and in accordance with
this Service Manual. Otherwise, damage to the
Medi‑Therm III machine and improper therapy may
result.
• Do not tip machine over without rst draining the water
out and unplugging the power cord. Electrical shock or
damage to the machine can result.
• Use only Gaymar probes (see Accessories, page 6) or
equivalent YSI 400 series probes approved for use with
medical devices in the Patient Probe jack.
Use of other probes could result in erroneous
patient temperature values.
• When using the rate controlled Auto Moderate or
Auto Gradual modes for warming, switching to other
modes, e.g. Auto Rapid or Manual, or changing the
temperature set point during the therapy will cause the
Medi-Therm to reset the therapy. Altering the Mode
or Temperature set point may impact the overall
duration of the therapy.
Add distilled water only. Failure to use distilled water
may result in poor machine performance.
• Do not use alcohol, since it is ammable.
Alcohol may also accelerate blanket/body wrap
deterioration.
• Do not operate the machine without water, since
damage to internal components may result.
• Do not overll. Overlling may result in overow
because the water in the blanket/body wrap drains
back into the machine when the machine is turned
off.
• For grounding reliability, plug the Medi-Therm III
machine only into a properly grounded outlet.
• To prevent damage to the power cord, always keep
the power cord retainer in place.
Machine Precautions
DANGER
WARNING
CAUTION
1

MTA7912 Service ManualRepairs/Warranty
2.0 Repair Policy
For customers who repair Gaymar Medi-Therm III machines at
their location, this manual contains information to allow a qualied
biomedical technician, familiar with practices for servicing
medical devices, to make necessary repairs. Service training for
the Hyper/Hypothermia machine is recommended and can be
arranged through your local dealer.
2.1 Limited Warranty
The Medi-Therm III 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 ve year prorated warranty. During the warranty
period, contact your local dealer.
Warranty does not cover products abused, misused, or altered
outside the factory. There are no obligations on the part of
Gaymar for consequential damages arising out of or in connection
with the use or performance of the product. Gaymar disclaims
all implied warranties including, but not limited to, the implied
warranties of merchantability and of tness for a particular
purpose.
2.2 Warranty Repairs
All in-warranty eld repairs must be authorized by Gaymar’s
Export Department before proceeding.
2.3 Out-of-Warranty Repairs
The following repair options are available when local machine
servicing is elected:
I . Defective Component
Replacement parts can be ordered from your local dealer.
Specify the Gaymar part number; refer to the Parts Lists in
section 10.0 of this manual.
2. Defective Printed Circuit (PC) Board
Defective PC boards can be exchanged for replacement
boards at a xed cost directly from your local dealer.
3. Defective Head
The defective head module can be returned (without base)
for repair. Contact your local dealer for information.
4. Machine Repairs
If the Medi-Therm III machine becomes defective and the
cause of the problem cannot be determined, the complete
machine can be returned to your local dealer for servicing at
the purchaser’s expense. This normally represents the most
expensive repair option. Contact your local dealer.
2
2.4 Return Authorization
Please contact your local dealer.

MTA7912 Service Manual
3.0 Specications
3.1 Physical
Specications
3.2 Thermal
3
ModelMTA7912
Dimensions 94 cm high x 48 cm deep x 36 cm wide
Weight 76.3 kg (full); 68.6 kg (empty)
Normal Reservoir Operating Volume 9.5 liters distilled water
Operating Ambient Temperature Range
15.6°C to 32.2°C
Power Loss Indicator Battery 8.4V NiMH
RefrigerantHFC-134a; 0.234 kg (8.25 oz.)
Fuse (stepdown transformer) 5 mm x 20 mm T, 6.3 A, 250 V, L
Physical Specifications
High Temperature Limits Fixed
Backup System 1 - Overtemperature probe RT3
41.1°C to 43.6°C (Machine will go into a REMOVE FROM USE
NOWshutdown condition and the alarm will be on.)
High Temperature Limits Fixed
Backup System 2 - Thermostat S2
44°C to 49°C (Machine will go into a REMOVE FROM USE
NOWshutdown condition and the alarm will be on.)
Low Temperature Limits Fixed
Backup System 2 - Thermostat S1
-3.0°C to 2.5°C (Machine will go into a REMOVE FROM USE
NOWshutdown condition and the alarm will be on.)
Add Water Alert Actuation
Less than 7.6 liters of water in the cold reservoir
Check Patient Alert Activation Temperature
(whenever probe is used)
Below 29°C or above 40°C
Machine Ceases Therapy (whenever probe is used)
Below 29°C or above 45°C
Patient Temperature Control Range for
PATIENT CONTROL mode
30°C to 39°C
Patient Temperature Control Range for
BLANKET CONTROLmode
4°C to 41°C
Flashing Temperature Display
(with setpoint 30°C or greater)
·BLANKET CONTROL MODE: Actuates when actual temperature
is not within 1.0°C of setpoint 4 hours after powerup, 4 hours after
a setpoint change, or 10 minutes after the first instance of the
actual temperature becoming equal to the setpoint.
·PATIENT CONTROL MODE (except warming a patient in
MODERATE or GRADUAL mode): Actuates when actual
temperature is not within 0.5°C of setpoint 4 hours after powerup
or 4 hours after a setpoint change.
·PATIENT CONTROL MODE (warming a patient in MODERATE or
GRADUAL mode only): Actuates when actual temperature is not
within 1.0°C of the desired warming rate. See section 6.4.5, p. 14.
Thermal Specifications

MTA7912 Service ManualSpecications
3.3 Performance
Patient Temperature Measurement
Accuracy
± 0.4°C (using Gaymar disposable probe)
± 0.3°C (using Gaymar reusable probe)
Display Accuracy ± 0.2°C
Display Resolution
WATER TEMPERATURE
0.1°C
Display Resolution
PATIENT TEMPERATURE
0.1°C
Controller Accuracy
WATER TEMPERATURE
± 0.8°C
Controller Accuracy
PATIENT TEMPERATURE
± 0.5°C
Flow* 60.6 liters per hour
Performance Specifications
* Minimum flow rates through a full size Gaymar Hyper/Hypothermia Blanket
4
3.2 Thermal (continued)
Figure 1—Typical water warm-up rate
(with full size blanket)
Figure 2—Typical water cooldown rate
(with full size blanket)
WARM-UP RATE (typical)
0
5
10
15
20
25
30
35
40
45
0510 15 20 25
Time (minutes)
Temperature (°C)
COOLDOWN RATE (typical)
0
5
10
15
20
25
30
35
40
45
0510 15 20 25 30
Time (minutes)
Temperature (°C)

MTA7912 Service Manual
3.4 Electrical
3.6 Classication
3.5 Regulatory
Current Leakage, Earth
Neutral closed
Neutral open
175 microamps maximum
125 microamps maximum
Current Leakage, Patient Probe
Neutral closed
Neutral open
100 microamps maximum
100 microamps maximum
Voltage ~220 V to ~240 V ± 10%
Frequency 50 Hz
Power Consumption Capacity 1575 VA
Current 6 A
Detachable Power Cord
Use only an International (harmonized) three-wire
cordset using cordage approved to HD-21.
Conductor size is 1.00 mm2(H05VVF3G1.00).
Electrical Specifications
Classification
● EN60601-1 Class 1, grounded, not suitable for use in the
presence of flammable anesthetic mixture with air or
with oxygen or nitrous oxide. Not classified for protection
against harmful ingress of liquid.
● EN60601-1-2, Class A, CISPR 11, emission requirements.
● EN60601-2-35
5
Specications
Regulatory Medical Device Directive (93/42/EEC) Class IIb (indicated by CE mark)

MTA7912 Service Manual
6
4.0 Blankets/Body Wraps/Accessories
Single Patient Use Blankets,
Polymer with Nonwoven Fabric
REF DHP810 O.R. Table and General Use
(64 cm x 163 cm)
REF DHP812 Pediatric General Use
(56 cm x 84 cm)
REF DHP813 Adult General Use
(76 cm x 163 cm)
Single Patient Use Blankets, All Vinyl
REF DHP901 Adult General Use
(64 cm x 175 cm)
REF DHP902 Pediatric General Use
(64 cm x 91 cm)
Reusable Blankets, All Vinyl
REF HP7010 Adult General Use
(64 cm x 175 cm)
REF HP7020 Pediatric General Use
(64 cm x 91 cm)
Single Patinet Use Torso Wraps, Polymer with
Nonwoven Fabric
REF DHV530 Small/Medium
REF DHV535 Large
Single Patinet Use Leg Wraps, Polymer with
Nonwoven Fabric
REF DHL540 One size ts all
All blankets require use of the reusable DBK35CE
Connector Hose.
Accessories *
(see item 1, p. 59) Detachable Power Cords
REF DBK35CE Connector Hose (3 meters)
REF PAT101CE Reusable Adult Patient Probe (3 meters)
Rectal/Esophageal
REF PAT102CE Reusable Pediatric Patient Probe (3 meters)
Rectal/Esophageal
REF PAT108CE Reusable Patient Probe (3 meters)
Skin Surface
REF DP400CE Disposable Adult and Pediatric Patient
Probe (0.9 meter) Rectal/Esophageal
[requires ADP10CE Adaptor Cable]
REF ADP10CE Reusable Probe Adaptor Cable
(3 meters) for DP400CE Probe
* These Gaymar probes, adapters, and hoses should be
used only with Gaymar Hyper/Hypothermia Machines.
ADP10CE DP400CE
MTA7912
Blankets/Body Wraps/Accessories
Figure 3—Disposable Probe/Reusable Adaptor Cable

MTA7912 Service Manual
Water Fill Opening
Lift cover. Fill unit with
distilled water until green
band on oat is fully visible.
Dual Blanket/Body Wrap
Connections with Quick‑
disconnects and
Probe Check Well
Use PROBE CHECK
well to verify the
integrity of the
patient probe.
Figure 4—Medi-Therm III Hyper/Hypothermia System
Medi-Therm III
machine
control panel
Gaymar probe or equivalent YSI
400 series probe approved for use
with medical devices.
Hyper/Hypothermia
blanket/body wrap
ON/OFF Switch
(Circuit Breaker)
Controls power to
Medi-Therm III.
Patient Probe Jack
Accepts patient probe plug connecting patient
probe to machine. Use only Gaymar probes
or equivalent YSI 400 series probes approved
for use with medical devices.
Medi-Therm III System
7

MTA7912 Service ManualOperator Control Panel
MACHINE STATUS
FLOW‑OK indicates water is owing adequately.
WARMING indicates the machine is heating.
COOLING indicates the machine is cooling.
TEST LIGHTS ashes all indicator lights and
digital displays, while sounding an audible alarm.
ALARM SILENCE temporarily silences the
audible alarm. The audible alarm will reactivate in
10 minutes if the condition persists.
ALERTS
CHECK FLOW indicates the ow of water to the
blanket/body wrap has been restricted.
NOTE: When two gray hose sets are in use, the
CHECK FLOW alarm will only sound if the ow
through BOTH gray hose sets is occluded.
CHECK PATIENT indicates the patient probe is
sensing an abnormal patient temperature (below
29°C or above 40°C). It may indicate the patient
probe has become dislodged, an incorrect probe
is being used, or a probe has become defective.
An audible alarm accompanies this alert.
ADD WATER indicates the water reservoir is
lled to less than the recommended level.
REMOVE FROM USE NOW indicates
the Medi-Therm III machine has shut down due
to a malfunction.
Remove the machine from use. Contact
qualied medical service personnel.
FLASHING DISPLAY indicates that the water
or patient temperature is not being maintained
within the acceptable limits of the set point
temperature. It is accompanied by an audible
alarm. See section 3.2 for explanations of the
various alarms that have a ashing temperature
display.
POWER LOSS INDICATOR lights when
power is removed and ON/OFF circuit breaker
is ON. [located on front of machine]
5.0 Operator Control Panel
See gure 5, page 9.
8