Heating System
Contents
1. The control unit is used to control all the functions of the Warmer It also provides the user with visual displays describing Warmer operating conditions Front of control unit On Off Switch Turns the power on off for the whole warmer Alarm system Alarm speaker sounds when there is an alarm condition Alarm button light flashes when an alarm condition exists Pressing this button turns the alarm speaker audible alarm off for 9 minutes WARMER 3 10 3 18 VER1 1 Control Unit Sensor Temperature Dial This dial sets the desired temperature of the baby warmer mattress The possible temperature range is 32 38 C in 0 1 C increments It is set by the user Turning the dial clockwise increases the temperature setting and counterclockwise dcreas es the temperature setting Alarm Speaker When an alarm condition exists the speaker will sound An alarm condition will occur when the temperature of the sensor is higher than the set temperature or if the sensor cannot make an accurate temperature reading Horizontal LED display This displays the temperature recorded by the skin sensor the baby s skin tepera ture The sensor has an accuracy of 0 3 C and a range of 19 5 45 8 C Horizontal LCD display The top line displays the set temperature dialed by the user 32 38 C and any relevant messages or warnings The bottom line displays the APGAR clock after the initial warm up period APGAR button Pressing2. ON THE WARMER LCD display Visible blue backlight and clear text Red 7segment display segment display is clear and correct E E 3 Alarm test Short beep during startup alarm light is on during beep Heater bargraph display Clear and correct Ee 5 Press button 1 LCD display shows correct nr Hours o len EEE Press button 2 LCD display shows 4 correct temperatures 1 babysensor temp 2 3 ambient temp 4 OFF 7 Turn up down settemp knob Temperature in 7segment display should go up down Min 32 C Max 38 9 C Bargraph display also changes up down Turn ON OFF the Halogen light working correct Halogen light on the top K After a few minutes Bed should warm up and LCD display shows correct babysensor temp 10 Alarm test heat up Alarm should raise when babysensor to 40 C babysensor gt 39 C Turn off warmer for 10m and wait Turn on again 11 Look at heaterpower Heaterpower 100 warming up a after few minutes heaterpower should decrease 12 Settemp 38 C Tests 1 11 are OK Warmer ON at least and temperature of bed 2 hours babysensor is close to 38 C After 2h repeat tests 1 11 TURN OFF THE WARMER TESTED APPROVED Y MTTS WARMER MTW 0603 4 VER1 1 WARMER TEST REPORT HOSPITAL NAME S N DATE TESTED BY APPROVED BY a s eect Resu OK Fan 7 TURN ON THE WARMER LCD display Visible blue backlight and clear text Red 7segment display segment display is clear and c
3. that the power cable from the wall to the control unit has an earth pin there should be 3 pins Try a different 3 pin cable to test if it is damaged e Ensure the power cable is connected securely e Some hospitals do not have an adequate earth connection If you continue to notice a tingling sensation switch off the warmer immediately discontinue use and call MTTS for service The warmer is uneven on the ground e There is a hexagonal nut just above each wheel turn one of these nuts to change the height of the leg The warmer seems too hot cold It is very difficult to determine if the warmer is at the right temperature using your senses Your perception of temperature can change depending on your health your mood ambient environmental conditions amongst many other things If you suspect the warmer is not at the right temperature place a thermometer in the centre of the bed and set the warmer temperature to be 4 degrees above the ambient temperature lf after 10 minutes the thermometer is not within 2 degrees of the set temperature then the warmer must be recalibrated Please call MTTS for this to occur Note that the warmer can only raise the temperature If the set temperature is below the ambient temperature the heating system will not operate WARMER 3 10 3 18 VER1 1 MTTS WARMER MTW 0603 4 VER1 1 WARMER TEST REPORT HOSPITAL NAME S N DATE TESTED BY APPROVED BY TEST EXPECTED RESULT OK FAIL TURN
4. ER 3 10 3 18 VER1 1 Heating System 6 9 To test the heater element use a multimeter to ensure the resistance from one end to the other is between 95 and 100 ohm Pic 83 Pic 83 6 10 Slide a new heater element into the warmer system all the way then bring it back 5mm so it has room to expand when hot Also make sure that the heater element is 20mm from the top of the reflector 6 11 Replace all of the nuts washers and wire lugs in the correct order as shown here Pic 84 6 12 Replace the insulation Ensure that the insulation does not touch the halogen bulb and that there is at least 5cm of space around the bulb Pic 85 6 13 Replace the front and top plate Nut Nut Washer Pig Washer i e Nut Pic 84 Pic 85 Medical Technology Transfer and Services Temperature Sensor Operating Principle The temperature sensor measures the temperature of whatever it is attached to Preventive Maintenance There is no preventive maintenance required for the Temperature Sensor However it should be inspected every 6 months by a hospital technician and any failures immediately reported to MTTS Folding Table and Bed Operating Principle The Bed is used to provide a location for the baby to receive treatment by the Warmer The folding bed is used as a convenient location to put equipment or miscellaneous items Preventive Maintenance There is no preventive maintenance re
5. Hz 180 240V 300W 180V 550W 240V WARNING Do not modify this equipment without authorization of the manufacturer WARNING dispose of equipment properly at end of equipment service life Y VY Y Y Y Y Y Y Y Y Y Y Table of contents Important information General technical information Table of contents Assembly Introduction Warmer System Control Unit Heating System Temperature Sensor Folding Table and Bed Troubleshooting Warmer Test Report 10 11 14 32 33 34 35 Medical Technology Transfer and Services Ymtts Assembly Insert the enclosed pieces of black Tighten the screws with a spanner Step 1 Step 2 plastic to ensure a tight fit Pic 5 Make sure washers are used Pic 6 Take the cardboard box apart using Take the Warmer out of the box a sharp knife or scissors Pic 1 Pic 2 Pic 1 Pic 2 Pic 5 Pic 6 Step 3 The 2 holes on the stand and 2 holes on the bed should align Use Insert the overhead stand into the one hand to hold the stand and the bed at the available hole Pic 3 other hand to insert the screw Pic 4 Step 4 Assemble the heating system onto the stand Pic 7 8 Pic 4 Ensure the holes of the frame align Screw 4 screws into the heating with the holes of the heating system by hand Pic 10 system Pic 9 Pic 10 This photo shows the 4 screws Using a spanner tighten all 4 temporarily holding the h
6. SERVICE MANUAL V 3 10 318 www mtts asia com Important information This manual will help you perform preventive maintenance on your MTTS Warmer device Preventive maintenance should be performed every 6 months and all the information required is enclosed in this manual Your Warmer came with a tool box which contains all the tools and spare parts for the first session of preventive maintenance For all further maintenance you will have to order spare parts from MTTS The tool box includes Heater element holder Transformer Light bulb Switch for halogen light Halogen light connector and wires Thermal wire insulation If you have any technical problems please call the MTTS hotline at Tel 84 43 766 6521 Fax 84 43 766 3844 Email assistance mitts asia com Contact person Mr Tran SY Huan General technical information Warmer model 3 10 3 18 Warranty 1 year Expected service life 5 years Operating conditions the warmer has been tested to function properly in 23 30 C If possible use the warmer in environments within this temperature range Storage conditions Keep the unit covered with a cloth or plastic cover to prevent it get ting dusty or dirty Store in a dry environment Class Medical Electrical Equipment Warning to avoid the risk of electric shock the warmer must only be connected to a supply mains with protective earth Not classified against ingress of liquids 50 60
7. eating screws Pic 12 system in place Pic 11 Pic 12 Step 5 Connect electric wires This photo shows the lead from the control unit Pic 13 Connect the power cable to the control unit Pic 15 Connect the lead from the control unit to the heating system Twist the connector clockwise to tighten it into place Pic 14 Pic 14 Plug the sensor into the front panel Pic 16 Pic 16 Medical Technology Transfer and Services introduction The MTTS WARMER is designed to keep infants warm in first aid emergencies or medical environments that require an appropriate temperature It monitors the body temperature of the patient and adjusts the heat according to a desired set temperature Before beginning any technical tasks DO NOT FORGET to engage the brake on the wheels in order to prevent the Warmer from moving Turn OFF the Warmer and unplug it from 220V Warmer System The MTTS Warmer system is composed of Heating System Control Unit 1 Heating System Sensor 0000 Folding Table and Bed 2 Control Unit poa 3 Sensor 4 Folding Table and Bed Medical Technology Transfer and Services Control Unit Alarm Speaker Alarm Visual Indicator Alarm Mute Switch Set Temperature Display Set Temperature Knob Sensor Temperature Display Heater Power Display Sensor Connector On Off Switch Pic 18 OPERATING PRINCIPLE
8. ent holder with a new one Pic 31 2 9 Replace the insulation Ensure that the insulation does not touch the halogen bulb and that there is at least 5cm of space around the bulb Pic 31 2 11 Replace the front plate and 4 screws INFANT WARMER Pic 32 3 Replace Transformer 3 1 Remove the 4 screws at the end of the Heating System Pic 32 3 2 Remove the top cover of the Heating System Pic 33 34 3 3 Remove all of the fibreglass insulation within the Heating System Ensure gloves are worn as the fibreglass particles are highly irritating Pic 35 36 Pic 35 Pic 34 Pic 36 WARMER 3 10 3 18 VER1 1 Pic 37 38 Pic 37 Pic 39 3 6 Disconnect all of the wires from the transformer 3 6 1 If you follow the thermal insulation away from the transformer towards the halogen light you will notice a gap Pic 41 WARMER 3 10 3 18 VER1 1 3 4 Unscrew the transformer s mounting plate from the Heating System Enclosure Pic 38 3 5 Unscrew the transformer from its mounting plate You may need to secure the nut on the other side as shown here Pic 39 40 Pic 41 3 6 2 Pull back the thermal insulation so you can see the heatshrink Pic 42 Use a sharp knife to carefully remove the heatshrink Pic 43 44 3 6 3 Use wire cutters to cut through the solder connections Pic 45 3 6 4 Repeat this process for
9. he Heating System to give you room to work Ensure gloves are worn as the fibreglass particles are highly irritating Pic 64 65 Remove the Halogen light bulb Make sure the bulb doesn t fall onto a hard surface and break Pic 66 Use your fingers and a knife to remove the silicon attaching the wires to the mounting bracket Remove the screw and nut from the bulb mounting plate by using a screwdriver and something to hold the nut still Pic 67 Medical Technology Transfer and Services Pic 66 f Screwdriver holding the Screw still from the other side Pic 67 WARMER 3 10 3 18 VER1 1 Dela 5 8 5 9 5 10 5 11 5 12 5 13 Remove the bulb holder from the mounting plate and cut the wires Pic 68 69 Take a replacement set of wires with bulb holder in this case you should have some in your toolbox and prepare the ends of all wires by stripping the insulation and tinning them Slide thermal insulation and heatshrink onto the wires Solder the wires together Note that polarity isnt important Pic 70 Use a heat gun or lighter to melt the heatshrink around the wires Screw the new bulb holder back into the mounting plate Place silicon around the back of the bulb holder to stop the wires from moving and to keep the thermal insulation in place WARMER 3 10 3 18 VER1 1 Medical Technology Transfer and Services 5 14 9 15 5 16 6 1 Re
10. larm is on this means that the skinsensor is unplugged or it is broken Plug the sensor back in if it is unplugged If the sensor is plugged in and the screen stillreads Sensorfailure this meansthe sensoris broken Replace the sensor e Ifthe Sensor off baby alarm is on this means that the baby sensor is suspected to not be on the baby Place the sensor on the baby and wait 5 minutes If the alarm does not turn off automatically restart the warmer If problem persists call MTTS for assistance e Ifthe Amb Sensor fail alarm is on this means that the ambient temperature sen sors are not functioning properly Call MTTS for assistance WARMER 3 10 3 18 VER1 1 The warmer system is hot to touch e The warmer system is usually warm to touch however if it becomes too hot open the warmer system and check a that there is enough insulation and b that it has been placed correctly e If the problem persists discontinue use and call MTTS for service There is smoke or a burning smell coming from the warmer e Immediately turn off the warmer e Open the warmer system and check to see if any wires look burnt If so replace them Make sure that the insulation is inserted correctly See instructions e If the problem persists discontinue use and call MTTS for service When any metal on the warmer is touched one can feel a tingling sensation e This can be caused by inadequate earthing of the warmer Make sure
11. of thermal insulation should be placed over both wires from the transformer to this connection Pic 52 1 wire from the 220V end of the transformer connected to one other wire Place heat shrink and thermal insulation over this connection 1 wire from the 220V end of the transformer connected to 2 other wires This is the wire that was cut a short distance away from the 3 wire connection Place heat shrink and thermal insulation over this connection 3 13 Solder wires 3 13 1 2 wires from the 12V end of the transformer to the halogen bulb Polarity doesn t matter Pic 53 Pic 51 WARMER 3 10 3 18 VER1 1 3 13 2 1 wire from the 220V end of the transformer connected to the single wire 3 13 3 1 wire from the 220V end of 3 14 3 15 3 16 3 17 3 18 3 19 the transformer connected to 2 other wires Slide the heatshrink into the correct position and use a heat gun or a lighter to shrink the heatshrink around the bare metal Pic 54 55 Screw the transformer into its mounting plate Screw the transformer s mounting plate into the Heating System Enclosure Replace the fibreglass insulation Ensure gloves are worn as the fibreglass particles are highly irritating Ensure that the insulation does not touch the halogen bulb and that there is at least 5cm of space around the bulb Pic 56 Replace the top cover of the Heating System Replace the cover pla
12. orrect lt i ey 3 Alarm test Short beep during startup alarm light is on during beep Heater bargraph display Clear and correct Sez 5 Press button 1 LCD display shows correct nr Hours and clock Press button 2 LCD display shows 4 correct temperatures 1 babysensor temp 2 3 ambient temp 4 OFF Turn up down settemp knob Temperature in 7segment display should go up down Min 32 C Max 38 9 C Bargraph display also changes up down Turn ON OFF the Halogen light working correct Halogen light on the top e After a few minutes Bed should warm up and LCD display shows correct babysensor temp 10 Alarm test heat up Alarm should raise when babysensor to 40 C babysensor gt 39 C Turn off warmer for 10m and wait Turn on again 11 Look at heaterpower Heaterpower 100 warming up i after few minutes heaterpower should decrease 12 Settemp 38 C Tests 1 11 are OK Warmer ON at least and temperature of bed 2 hours babysensor is close to 38 C After 2h repeat tests 1 11 TURN OFF THE WARMER TESTED APPROVED i N MTTS Medical Technology Transfer and Services MEDICAL TECHNOLOGY TRANSFER AND SERVICES No 2 Lane 70 Linh Lang Ba Dinh Hanoi Vietnam Tel 84 43 766 6521 Fax 84 43 766 3844 Email assistance mtts asia com www mtts asia com Service Manual WARMER 3 10 3 18 VER 1 1
13. place Halogen Bulb 1 1 Ensure the entire Warmer is turned off by turning the switch off on the Control Unit Medical Technology Transfer and Services 1 2 Wait for the bulb to cool down Grasp the halogen bulb using your fingertips and pull Pic 20 1 3 Insert a new bulb The polarity of the bulb is not important 2 Replace Element Holder 2 1 Remove the 4 screws at the end of the Heating System Pic 21 2 2 Remove the top cover of the Heating System Pic 22 23 2 3 Remove all of the fibreglass insulation within the Heating System Ensure gloves are worn as the fibreglass particles are highly irritating Pic 24 25 2 4 Use pliers or a spanner to remove the nuts on the outer threads Also remove the washers Pic 26 Pic 21 Note the order that the nuts and washers are on the thread Pic 27 Pic 23 Pic 26 Pic 27 WARMER 3 10 3 18 VER1 1 WARMER 3 10 3 18 VER1 1 Medical Technology Transfer and Services 2 5 Remove the nuts on the central thread Note that you may need to hold the inner nut still as shown in pic 28 Also remove the washers and the wire lug Pic 30 2 8 Replace all of the nuts washers and wire lugs in the correct order as shown in Pic 30 2 10 Replace the top cover at the heating system WARMER 3 10 3 18 VER1 1 A A Ca Ia Pic 29 2 6 Remove the damaged heater element holder Pic 29 2 Replace the broken heater elem
14. place the fibreglass insulation Ensure gloves are worn as the fibreglass particles are highly irritating Ensure that the insulation does not touch the halogen bulb and that there is at least 5cm of space around the bulb Pic 71 Replace the top cover of the Heating System Replace the cover plate using 4 screws 6 Replace Heater Element Remove the 4 screws at the end of the Heating System Pic 72 6 2 Remove the top cover of the Heating System Pic 73 74 Pic 71 INFANT WARMER Pic 72 Pic 74 WARMER 3 10 3 18 VER1 1 Medical Technology Transfer and Services Pic 80 6 5 Remove the nuts on the central thread Note that you may need to hold the inner nut still as shown here Also remove the washers and the wire lug Pic 79 6 6 Remove the heater element holder Pic 80 6 7 Remove the nuts and washers on the other end of the central thread of the heater element 6 8 Slide out the heater element Pic 81 82 Pic 75 Pic 76 6 3 Remove all of the fibreglass 6 4 Use pliers or a spanner to remove insulation within the Heating the nuts on the outer threads Also System Ensure gloves are worn remove the washers Pic 77 as the fibreglass particles are highly irritating Pic 75 76 Note the order that the nuts and washers are on the thread Pic 78 Slide the heater element outin this direction Pic 81 Pic 77 WARMER 3 10 3 18 VER1 1 WARM
15. quired for the folding table and bed However every 6 months the folding table should be inspected by raising and lowering the fonding bed to ensure it moves easily and locks into the upright position securely Check that the side panels of the bed can be moved up and down easily Any failures should be immediately reported to MTTS Medical Technology Transfer and Services Troubleshooting The heater element never seems to warm up e If the set temperature is below the ambient temperature the heater element will not turn on The warmer is working properly e Ensure the cable from the control unit to the heating system is not damaged and is connected properly If the problem persists please call MTTS for service The displays on the control unit do not illuminate e Ensure the power cable to the control unit is not damaged and is connected properly The display is showing garbage information e Try resetting the machine by turning the power off and back on again If the problem persists please call MTTS for service The alarms do not stop e If the Temp too low or Temp too high alarms is on it means that the sensor temperature is out of range from the set temperature To test this move the sensor closer farther from the heater so that it can become with 10 of the set point If the alarm stops then the warmer is working properly If the alarm continues call MTTS for service e Ifthe Sensor failure a
16. te using 4 screws WARMER 3 10 3 18 VER1 1 Pic 54 Medical Technology Transfer and Services 4 Replace Light Switch 4 1 Remove the 4 screws at the end 4 2 Use a sharp knife to remove the of the Heating System Pic 57 heatshrink from the old switch Pic 58 INFANT WARMER Pic 57 Pic 58 4 3 Desolder the wires going to the 4 4 Remove old switch Pic 60 old switch Pic 59 Pic 59 Pic 60 4 5 Clean up the recently cut wires 4 6 Insert a new switch Make sure cut off wire that has solder on the 1 symbol is at the top it and strip the insulation Tin all of the wires WARMER 3 10 3 18 VER1 1 4 7 Slide heatshrink onto all wires about to be soldered 4 8 Solder wires to the switch Make sure you solder to a vertical pair of pins on the switch the polarity doesn t matter 4 9 Slide the heatshrink into the correct position and use a heat gun to shrink the heatshrink around the connection Pic 61 Pic 61 4 10 Replace the cover plate using 4 screws 5 Replace burnt wire The most common wires that require changing are those that go from the transformer to the light bulb 5 1 Remove the 4 screws at the end of the Heating System Pic 62 Pic 62 5 2 Remove the top cover of the Heating System Pic 63 Pic 63 WARMER 3 10 3 18 VER1 1 9 3 5 4 00 5 6 Pic 64 Remove enough fibreglass insulation within t
17. the wire coming from the transformer which is soldered to one other wire A Pic 43 3 6 5 The last wire of the transformer is soldered to 2 other wires Do not remove the heatshrink that is already there and do not cut into the existing connection For this wire cut it off a few centimetres from the connection away from the heatshrink Medical Technology Transfer and Services Pic 44 WARMER 3 10 3 18 VER1 1 3 7 Remove the old transformer Make sure you keep the bits of thermal insulation if they are still in good condition 3 8 Prepare some new heatshrink by cutting it to the right length about 2cm Pic 46 3 9 Take your new transformer and strip about 1cm of insulation from the end of each wire Pic 47 3 10 Clean up all the recently cut wires cut off wire that has solder on it and strip the insulation Pic 48 49 50 Pic 48 WARMER 3 10 3 18 VER1 1 Pic 46 Pic 47 Medical Technology Transfer and Services 3 11 Tin all of the wires Pic 51 3 12 There are 4 wires coming from the transformer that need to be soldered Each one requires heatshrink and thermal insulation in the configuration shown below Make sure to place the heatshrink and insulation before soldering 3 12 1 3 12 2 3 12 3 2 wires from the 12V end of the transformer to the halogen bulb Each of these connections should have heat shrink placed over them One piece
18. this button starts the APGAR timer Alarm indicates after 1 min 5 min 10 min 20 min and 30 min Sensor connector Site where the skin temperature sensor is plugged in Use only MTTS temperature sensors Back of control unit 220V power inlet Connect grounded power cord from grounded wall outlet to socket WARMER 3 10 3 18 VER1 1 Control Unit Diagnostic buttons Used by MTTS staff during maintenance Fuses Replaceable safety fuses 5A 250V AC S50A slow blow 5 x 20 mm 220V heater outlet Supplies power to heater element PREVENTIVE MAINTENANCE There is no preventive maintenance required for the Control Unit However it should be inspected every 6 months by a hospital technician and any failures immediately reported to MTTS Medical Technology Transfer and Services Heating System Light Switch Heater element Halogen Bulb Pic 19 OPERATING PRINCIPLE This part of the warmer houses the heater element and a halogen light source The heater element can provide up to 500W and is regulated by the temperature sensor The heating system is insulated with fibreglass A halogen lamp on the warmer provides light for health workers to treat check and care for the patient Turn it off after use to conserve the life of the lamp The halogen lamp is not a light to be used for the treatment of jaundice A switch on the end of the unit turns the halogen light on and off PREVENTIVE MAINTENANCE 1 Re
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