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Firstech, LLC. CM6200 Remote Starter User Manual

Contents

1. Alarm Curve O o gq Tau ln E wo pa 5 p 30 40 50 60 Time to Alarm minutes Figure 4 3 Temperature vs Time to Alarm Pressing mute during a temperature alarm silences the alarm for half the normal time period if the same temperature is maintained The low temperature warning and alarm can be caused by cold or drafty ambient conditions or can result from using gas flow rates outside the specification of the breathing circuit chamber or humidifier NOTE The low temperature alarm is disabled in stand by on software version 5 45 and 5 70 4 5 2 Non Heater Wire Operation Software versions 7 22 amp 7 23 When the airway temperature exceeds 41 C the heater plate is shut off and an immediate visible and audible high temperature alarm is activated In invasive mode the low temperature warning and alarm is identical for the heater wire mode see above after warm up In addition the airway temperature must reach 29 5 C in invasive mode or 26 C for non invasive mode within 15 minutes otherwise a visible and audible low temperature alarm will be given and the heater plate will be switched off This will occur if the airway probe has not been inserted into the breathing circuit After warm up if the airway temperature drops below 29 5 C or 26 C non invasive mode a visible and audible low temperature alarm will be given and the heater plate will be switched off NOTE The low temperature
2. lt 3 LPM In Intermediate flow 2 to 17 LPM Hi High flow gt 13 LPM H C C F Ventilated flow detected Airway temperature set point 0 1 C A Airway Duty Cycle During selection of this menu and while an airway probe out test is active the airway probe indicator will light E Water out number used to detect the presence of chamber water calculated from chamber power heater plate temp chamber temp During selection of this menu and while the water out number falls below a dry chamber threshold the water out indicator will light Last Alarm State the display will blank and the humidifier s last alarm will be shown on the indicators To clear LAS press and hold the mute and mode buttons for 1 second The humidifier will beep when LAS has been cleared Last Fault State refer to section 6 3 To clear LFS press and hold the mute and mode buttons for 1 second The humidifier will beep when LFS has been cleared Press the mute button to cycle to the start of the menu or the diagnostic menu will automatically exit after 6 seconds t SP HP Lr P dc O S S oF nd 32 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal 6 4 5 Diagnostic Menu for Software Version 7 22 Display Humidity Compensation HC algorithm Note HC is inactive while operating under non heater wire control Invasive mode compensation range is 0 0
3. C Add View850 Software Instructions 1 Mar 2000 Neonatal volume ventilation capability 15 May 2001 3 4 Performance 4 1 2 Power Up sequence 4 1 3 Manual Temperature Compensation TC 5 3 Cleaning Instructions Appendix E Product Change History Covers release of software version 6 00 1 November 2001 3 4 Performance Recommended Operating Temperature 15 to 26 C 4 1 1 Stand by Changed stand by power limits 4 1 3 Humidity Compensation HC mode Auto HC mode option 4 2 Humidifier Controls Power button must be held for 1 second to switch OFF 4 4 Setup Indicators Two LED s now indicate heater wire connect alarm 4 5 Operational Alarms Low temperature alarm enabled during stand by 6 4 Diagnostic Menu OFF Offset removed from diagnostic menu Covers release of software version 7 00 2 April 2002 3 4 Performance Recommended Operating Temperature 18 to 26 C 4 1 3 Humidity Compensation HC mode Changed step size to 1 C in non invasive mode 4 1 4 Breathing Circuit Recognition added 6 3 See Manual Error Codes removed redundant error code E33 6 4 Diagnostic Menu add new functions CHP and Cct Technical manual now covers software versions 5 45 5 70 6 00 7 00 1 May 2003 and 7 14 The following sections have been modified 3 3 4 1 3 4 1 5 4 4 5 3 6 4 7 2 3 7 2 6 Appendix E Added Non Heater Wire Mode in sections 3 0 4 0 6 0 and updated 1 July 2004
4. Electromagnetic environment guidance Floors should be wood concrete or ceramic tile If floors are covered with synthetic material the relative humidity should be at least 30 Mains power quality should be that of a typical commercial or hospital environment Mains power quality should be that of a typical commercial or hospital environment Mains power quality should be that of a typical commercial or hospital environment Mains power quality should be that of a typical commercial or hospital environment If the user of the MR850 requires continued operation during power mains interruptions it is recommended that the MR850 be powered from an uninterruptible power supply or a battery Power frequency magnetic fields should be at levels characteristic of a typical location in a typical commercial or hospital environment Ref 185041340 185041713 internal Guidance and manufacturer s declaration electromagnetic immunity The MR850 is intended for use in the electromagnetic environment specified below The customer or the user of the MR850 should assure that it is used in such an environment Immunity test IEC 60601 test level Electromagnetic environment guidance level Portable and mobile RF communications equipment should be used no closer to any part of the MR850 including cables than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter
5. 1 Open the case section 7 2 1 2 Disconnect the heater plate element thermistor and thermal cutout harnesses attached to the power PCB 3 Remove the three screws holding the heater plate see Figure 7 6 4 Cut cable ties attached to the heater plate harnesses Figure 7 6 Showing location of Heater Plate screws 5 Remove screw holding heater plate thermistor see Figure 7 7 6 Unsolder the wires attached to the thermal cutout and remove the old thermistor and harness 7 Place the new thermistor into position and attach using the screw MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 39 Thermal Cutout Thermistor Figure 7 7 Showing location of Heater Plate Thermistor Thermal Cutout and Element Screws 8 Solder the wires from the new harness to the heater plate thermal cutout 9 Attach the cable ties provided to the heater plate harness 10 Place heater plate back into position ensuring the springs underneath the heater plate are in place Attach to the humidifier s case using the three long screws that were previously removed 11 Connect the heater plate element thermistor and thermal cutout harnesses to the power PCB 12 Close the case section 7 2 8 Checking the heater plate element 1 Open the case section 7 2 1 2 Disconnect the heater plate element thermistor and thermal cutout harnesses from the power PCB 3 Measure the resistanc
6. 185041713 internal 59 14 Product Change History Due to upgrades performed on delivered MR850 Respiratory Humidifiers software and hardware versions are listed below It should be realised that possible future upgrades may change the operation of the Humidifier Please note that software Versions 4 40 and 4 44 will only work with Revision A or B PCB s and Version 5 12 or later will only work with Revision C D or E PCB s History Change for model JHU Software Introduction Serial Number Comments ee Version 440 19 September 1998 19 September 1998 1998 9885xxx00000 First production release am 22 October 1998 Software upgrade 12 April 1999 9985xxx00053 Release of new PCB to accommodate change in temperature probe circuit redesign sta le May 1999 MO Software upgrade E 14 January 2000 2000 85xxx00028 Release of new PCB to improve manufacture 5 23 3 April 2000 2000 85xxx01661 Software upgrade for low flow control stability 5 33 25 July 2000 2000 85xxx02806 Software upgrade allowing Neonatal volume ventilation capability Manual Temperature Compensation TC implemented 5 34 11 October 2000 2000 85xxx04212 Software upgrade to improve EMI immunity Dp 545 19 February 2001 2001 85xxx00427 Software upgrade 7 00 2 April 2002 2002 85xxx00976 Software upgrade Improve HC speed in Non invasive mode F amp P Co axial circuit recognition and control NONE 14 April 2003 2003 85JHU008266 Software release
7. 8 1 4 4 A humidifier Warm up and Control Check Section 8 1 5 8 1 1 Entering the Service Menu The MR850 humidifier has a special mode which enables the operator to verify correct operation To enter this mode hold down the power button on the front of the humidifier then apply mains power The See Manual indicator will light and the humidifier will enter the service menu The service menu has six different tests 6 Display Test Secta Pushing the mute button while a number is displayed enters the relevant service test When End is displayed the user can press the mute button to cycle back to the start of the service menu If no button is pushed the service menu will automatically exit after six seconds NOTE All tests performed in the service menu will automatically exit after 30 minutes 8 1 2 Humidifier Calibration Check This section describes how to check the accuracy of the humidifier s temperature and flow measurement electronics Equipment Required e MR850 Humidifier e Reference Probe Set Fisher amp Paykel Healthcare part number 900MR870 44 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 8 Hold down the power button then apply mains power to the humidifier This action places the humidifier into service mode Select service mode number 1 Calibration Probe 1 Check by pushing the mute button when 1 is displayed Insert the calibration probe w
8. Open the case section 7 2 1 2 Disconnect all harnesses attached to the power PCB Disconnect the mains and protective earth wires by unscrewing the terminal blocks and cutting the cable ties Figure 7 4 3 Remove PCBs and using an appropriate tool remove the ROM from the 32 pin socket on the control PCB Store the ROM in an antistatic bag or box 4 Unpack replacement PCBs install the ROM from the previous PCB 5 Replace the mains fuses F3 F4 with the correct type and attach mains and protective earth wires using the cable ties provided Figure 7 4 6 NOTE If revision A PCBs are being replaced with revision C PCBs or later look for identification on the control board then the wiring of the heater plate thermal cutout and thermistor will need to be changed Un clip the four pins from the connector by using a small flat bladed screwdriver Re wire the connector so the thermistor wires white are located on the inner two pins and the thermal cutout wires black are located on the two outer pins Connect harnesses from the transformer and heater plate to the power PCB Close the case section 7 2 8 Update the EEPROM software version step 5 section 7 2 6 0 Check that the humidifier powers up normally and complete a full performance test section 8 eee MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 37 di Ml poi nn Heater P A Element
9. P Co axial circuit recognition and control NOS 18 March 2004 2004 85GJU002592 Software upgrade 7 21 9 June 2004 2004 85GJU006775 Software upgrade PTS access through serial command Humidifier model protection Software release Japan only E 7 21 9 July 2004 2004 85GJU008765 Release of new PCB capable of selective soldering a released as Software upgrade software upgrade Introduction of the automatic kits and manual Humidity Compensation HC mode Added time delay to the OFF MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 61 History Change for all model except JHU GJU Software Introduction Serial Number Comments o Version A pesana 19 September 1998 ETS First production release First production release release 12 E 1999 9985xxx00053 Release of new PCB to accommodate change in temperature probe circuit redesign INTE May 5 May 1999 maya Software upgrade 14 January 2000 2000 85xxx00028 Release of new PCB to improve manufacture 3 April 2000 2000 85xxx01661 Software upgrade for low flow control stability 25 July 2000 2000 85xxx02806 Software upgrade allowing Neonatal volume ventilation capability Manual Temperature Compensation TC implemented 11 October 2000 2000 85xxx04212 Software upgrade to improve EMI immunity me a 19 February 2001 2001 85xxx00427 Software upgrade button Enable low 15 November 2001 temperature alarm
10. Press mute to access this function 4 To enable non heated operation press both mute and mode buttons simultaneously for 1 second the humidifier will beep twice and the temperature display will show nhh Release both buttons The humidifier is now configured for non heated circuits This setting will be remembered each time the humidifier is turned on Deactivating Non Heater Wire Operation The simplest way to de activate non heater wire operation is to connect a heated breathing circuit Alternatively it can be de activated the same way that non heated circuit operation was activated see above 4 1 3 Stand by Operation If the humidifier detects a problem with its setup or operation it will alarm Depending on the severity of the alarm condition the humidifier will either remove all power from the heating systems or enter stand by The humidifier will also enter stand by if the gas flow through the breathing circuit has stopped MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 13 Stand by Software versions 5 45 amp 5 70 e Heater wire power is set at 30 e Control of chamber temperature is attempted within the following limits e Heater plate temperature is limited to 60 C e Heater plate power is limited to 20 Stand by Software version 6 00 onward e Heater wire power is set at 15 e Control of chamber temperature is attempted within the following limit
11. Recommended separation distance Conducted RF d 1 2vP IEC 61000 4 6 Radiated RF d 1 2VP 80 MHz to 800 MHz IEC 61000 4 3 d 2 3VP 800 MHz to 2 5 GHz where P is the maximum output power rating of the transmitter in watts W according to the transmitter manufacturer and d is the recommended separation distance in metres m Field strengths from fixed RF transmitters as determined by an electromagnetic site survey should be less than the compliance level in each frequency range Interference may occur in the vicinity of equipment marked with the following symbol o NOTE 1 At 80 MHz and 800 MHz the higher frequency range applies NOTE 2 These guidelines may not apply in all situations Electromagnetic propagation is affected by absorption and reflection from structures objects and people a Field strengths from fixed transmitters such as base stations for radio cellular cordless telephones and land mobile radios amateur radio AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy To assess the electromagnetic environment due to fixed RF transmitters an electromagnetic site survey should be considered If the measured field strength in the location in which the MR850 is used exceeds the applicable RF compliance level above the MR850 should be observed to verify normal operation If abnormal performance is observed additional measures may be necessary such as reorienting or relocating
12. alarm will be inactive in stand by 4 5 3 See Manual Indicator This indicates a serious hardware fault Please refer to section 6 Troubleshooting 20 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal 5 Maintenance Procedures In order to keep your humidifier in good working order it is necessary to perform maintenance at regular intervals 5 1 Maintenance Schedule 5 1 1 MR850 Humidifier Annually a Check MR850 for physical damage e Check the mains cable for damage replace if necessary e Check the heater plate for deep scratching etc replace if necessary e Check the heater wire adaptor for kinks abrasions and damaged connectors Check that the plugs couple with the sockets on the humidifier b Carry out a full performance test This procedure is detailed in section 8 NOTE A maintenance check sheet is given in Section 9 5 1 2 MR850 Temperature Probe Every Six months a Visually check the humidifier probes for physical damage e Check that the chamber probe s glass thermistor has not been damaged Replace probe if required e Inspect the chamber probe s glass thermistor for deposits or foreign material Clean probe as required e Check the probe cable for kinks and abrasions etc e Check that the probe connectors couple with the humidifier sockets b A temperature accuracy check and flow accuracy check should be performed on the MR850 temperature probe as outline
13. along the inspiratory limb If however this temperature gradient is not maintained the chamber set point is reduced in 0 5 C steps minimum setting of 35 5 C in order to reduce condensate buildup in the breathing circuit If the chamber set point is less than 37 C and sufficient temperature gradient has been maintained along the inspiratory limb then the chamber set point is increased back up to 37 C in 0 5 C steps Non Invasive mode is suitable only for patients whose natural humidification system i e upper airways has not been bypassed but are receiving gas via a facemask or similar The humidifier normally controls the chamber outlet temperature to 31 C and the airway temperature to 34 C maintaining a 3 C temperature gradient along the inspiratory limb If automatic or manual humidity compensation has been activated then the displayed temperature may be higher than 37 C Invasive mode or 31 C Non Invasive mode The humidity compensation algorithm takes precedence over the condensation control algorithm 16 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal 4 2 3 Mute Button The mute button silences the humidifier s audible alarm The muted time depends on the alarm condition In general alarms will be muted for 2 minutes A chamber or airway probe alarm is muted for a longer time until the humidifier determines whether the probe is in or out
14. determine whether the humidifier s display is working correctly 1 2 3 4 5 Enter the service menu refer section 8 1 1 Select service mode number 6 Display test by pushing the mute button when 6 is displayed Check that all of the display LEDs and indicators are turned on Push the mode button to change to a display cycle test Check that all the LEDs and indicators light in sequence and that there is only ever one LED on at a time Push the Mute button to exit back to the service menu If the humidifier does not pass the display test then it is recommended that the humidifier PCBs are either replaced or sent for servicing refer 7 2 3 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 45 8 1 4 Humidifier Voltage Calibration Check This check is required when the humidifier s PCBs have been serviced or replaced or if the mains transformer has been replaced Equipment Required e An AC voltmeter capable of measuring RMS mains voltage to 0 5 accuracy e Suitable breathing circuit for MR850 for example 900RT100 e MR850 Heater Wire Adaptor for example 90MR800 1 Connect a breathing circuit to the humidifier with the heater wire adaptor Make sure the inspiratory limb is correctly plugged in and that a temperature or calibration probe is not plugged in to the humidifier 2 Safely connect the AC voltmeter to the mains supply NOTE Connect the voltmeter
15. in close proximity to the mains socket used to power the humidifier 3 Enter the service menu refer section 8 1 1 4 Select service mode number 3 Voltage Calibration Check by pushing the mute button when 3 is displayed 5 Calculate the percentage of the actual mains voltage the AC voltmeter reading to the nominal mains voltage for the humidifier model being tested NOTE The nominal mains voltage is the voltage indicated on the left side of the humidifiers case and will be either 230 V 127 V 115 V or 100 V Percentage mains 100 x Actual mains voltage RMS Nominal Mains voltage For example MR850 Model AEK Nominal Mains Voltage is 230 V Voltmeter Reading 240 5 V Percentage mains 100 x 240 5 230 104 5 Round any decimal points 105 6 Adjust the reading on the humidifier s display to read the same as the value calculated above This is achieved by pushing the mode button to increase or the power button to decrease the percent value on the humidifier s display 7 Check that the mains voltage has remained constant If necessary recalculate the percentage of actual mains voltage 8 Store the new value in the humidifier s memory by pushing and holding the mute and mode buttons together for 1 second The humidifier will beep when the value has been correctly stored 9 Exit the voltage calibration test by pushing and holding down the mute button for longer than one second 8 71 5 Humidifier War
16. in stand by 7 00 2 April 2002 2002 85xxx00976 Software upgrade Improve HC speed in Non invasive mode F amp P Co axial circuit recognition and control 7 14 22 April 2003 2003 85xxx009621 Software upgrade Auto HC increased to 5 C Diagnostic menu changes Added Non heater wire operation NOS 31 July 2003 2003 85xxx013518 Software upgrade 7 22 28 May 2004 2004 85xxx006024 Humidifier model protection E 7 22 2 July 2004 2004 85xxx008200 Release of new PCB capable of selective soldering 62 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal Only released as Software upgrade software upgrade kits Introduction of the automatic and manual Humidity Compensation HC mode Added time delay to the OFF PTS access through serial command
17. mode button will toggle between the airway and chamber temperature 8 Compare the temperatures obtained with the thermometer The temperature difference between the humidifier temperatures and the thermometer should not be greater than 1 5 degrees If the difference is larger than 1 5 C the probe should be replaced 8 2 2 Probe Flow Accuracy Test This test is used to determine the flow accuracy of the temperature flow probes that are used with the MR850 humidifier Equipment Required MR850 Humidifier Flow Temperature Probe Suitable Breathing Circuit for MR850 for example 9OORT100 Suitable Chamber for MR850 for example MR290 Gas supply constant flow of 10 1 SLPM Standard Litres Per Minute MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 47 O Perform a humidifier calibration check as outlined in section 8 1 2 ignore this step if recently completed Set up the humidifier as shown in Figure 4 1 Make sure the chamber probe is correctly inserted into the breathing circuit Connect the humidifier chamber inlet to the gas supply Enter the service menu refer section 8 1 1 Select service mode number 5 Flow Accuracy Check by pushing the mute button when 5 is displayed Plug the probe under test into the humidifier NOTE If a probe fault condition exists the humidifier will alarm at this time The humidifier will display until a flow measureme
18. or connect a heater breathing circuit CSP Chamber set point in 0 1 C resolution eg 37 0 Invasive mode range 35 5 to 42 C Non Invasive mode range 31 0 to 36 0 C Cdc Chamber Duty Cycle During selection of this menu and while a chamber probe out test is active the chamber probe indicator will light Chamber Power Flow ratio W LPM Heater Plate Temperature 1 C Flo Gas Flow Rate 0 1 LPM Unknown Flow flow measurement not started FLr Gas Flow Rate Range Unknown Flow flow measurement not started no No flow Stand by Lo Low flow lt 3 LPM In Intermediate flow 2 to 17 LPM Hi High flow gt 13 LPM Ventilated flow detected ASP Airway temperature set point 0 1 C Adc Airway Duty Cycle During selection of this menu and while an airway probe out test is active the airway probe indicator will light H20 Water out number used to detect the presence of chamber water calculated from chamber power heater plate temp chamber temp During selection of this menu and while the water out number falls below a dry chamber threshold the water out indicator will light LAS Last Alarm State the display will blank and the humidifier s last alarm will be shown on the indicators To clear LAS press and hold the mute and mode buttons for 1 second The humidifier will beep when LAS has been cleared Last Fault State ref
19. point 0 1 C Airway Duty Cycle Last Humidifier Alarm State the display will blank and the humidifier s last alarm will be shown on the indicators To clear LAS press and hold the mute and mode buttons for 1 second The humidifier will beep when LAS has been cleared Last Humidifiers Fault State refer to section 6 3 To clear LFS press and hold the mute and mode buttons for 1 second The humidifier will beep when LFS has been G C O A A L L cleared S Software version Press the mute button to cycle to the start of the menu or the diagnostic menu will automatically exit after 6 seconds MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 29 6 4 2 Diagnostic Menu for Software Version 6 00 Display Humidity Compensation HC algorithm Invasive mode compensation range is 0 0 to 3 0 C CSP 37 0 to 40 C Non Invasive mode compensation range is 0 0 to 5 0 C CSP 31 0 to 36 0 C By pressing the Mute and Mode buttons together for 1 second or pressing the Mute and Power buttons together for 1 second the user can respectively move up or down through the settings listed below The humidifier will confirm the change with a double beep 5 0 5 0 C of chamber compensation Non Invasive mode only 4 0 4 0 C of chamber compensation Non Invasive mode only 3 0 3 0 C of chamber compensation 2 0 2 0 C of chamber compensa
20. the MR850 D Over the frequency range 150 kHz to 80 MHz field strengths should be less than 3 V m Recommended separation distances between portable and mobile RF communications equipment and the MR850 The MR850 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled The customer or the user of the MR850 can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment transmitters and the MR850 as recommended below according to the maximum output power of the communications equipment rr Separation distance according to frequency of transmitter m Rated maximum output 150 kHz to 80 MHz 80 MHz to 800 MHz 800 MHz to 2 5 GHz power of transmitter W D 1 2VP D 1 2VP D 2 3VP For transmitters rated at a maximum output power not listed above the recommended separation distance d in metres m can be estimated using the equation applicable to the frequency of the transmitter where P is the maximum output power rating of the transmitter in watts W according to the transmitter manufacturer NOTE 1 At 80 MHz and 800 MHz the separation distance for the higher frequency range applies NOTE 2 These guidelines may not apply in all situations Electromagnetic propagation is affected by absorption and reflection from structures objects and people MR850 Technical Manual Revision J Issued November 2005 Ref 185041340
21. the chamber Refill as necessary Check that the water bag and delivery tube are not occluded MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal Section 4 1 2 25 Symptom Corrective Action A low temperature Make sure the humidifier has had time to warm up and that is shown on the there is sufficient gas flow through the breathing circuit humidifier s The humidifier cannot maintain temperature If the Section 4 5 display with no temperature indicator is also on then an alarm will occur audible alarm eventually Humidifier or probe faulty Complete humidifier and probe Section 8 performance test Replace probe or service humidifier as required High displayed Flow has recently been changed allow 30 minutes for temperature no temperature to stabilise temperature alarm Manual or automatic humidity compensation is active Section 4 1 5 Temperature The gas flow rate may have suddenly changed Monitor Section 8 indicator flashes the displayed temperature if the temperature does not fall with audible alarm rapidly then remove humidifier from patient and complete a and a high performance test on the humidifier and temperature flow temperature is probe Replace probe or service humidifier as required shown 6 2 Technical Problems Problems that cause the humidifier to malfunction without an audible alarm are discussed in this section Symptom Corrective Act
22. the lower left of the front panel are intended to aid the user in identifying problems with the incorrect setup of the device and its accessories 4 4 1 Heater wire connector These indicators light if the heater wire in the breathing circuit has not been connected correctly or if the heater wire or heater wire adaptor is faulty An intermittent connection or excessive current total current in all limbs gt 3 5 A in the heater wires will also produce this alarm The humidifier will remove power from the heating systems if this alarm is active NOTE Software versions 5 45 and 5 70 do not light the upper indicator located on the breathing circuit NOTE Software versions 7 22 and 7 23 in non heater wire operation and without a heater wire connected no audible or visual heater wire alarm will be given Connecting a heated wire circuit will automatically cause the MR850 to default to heater wire operation MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 17 4 4 2 Temperature Flow Probe Connector This indicator will light if the temperature probe is not correctly plugged in or the probe used is faulty The humidifier tests for the following probe fault conditions e Temperature probe disconnected e Chamber thermistor open or short circuit e Airway thermistor open or short circuit e Flow thermistor open or short circuit shorted probe test e One thermistor shorted to another
23. to 5 0 C CSP 37 0 to 42 C Non Invasive mode compensation range is 0 0 to 5 0 C CSP 31 0 to 36 0 C By pressing the Mute and Mode buttons together for 1 second or pressing the Mute and Power buttons together for 1 second the user can respectively move up or down through the settings listed below The humidifier will confirm the change with a double beep 5 0 5 0 C of chamber compensation 4 0 4 0 C of chamber compensation 3 0 3 0 C of chamber compensation 2 0 2 0 C of chamber compensation 1 0 1 0 C of chamber compensation 0 0 0 0 C of chamber compensation NO compensation A Automatic humidity compensation mode Invasive mode 0 to 5 C in 0 5 C steps Non invasive mode 0 to 5 C in 1 C steps E Cct Connected breathing circuit identification S Standard inspiratory heater connected C Coaxial inspiratory heater connected E Expiratory heater connected No heaters detected while under heater wire control Non Heater Wire Operation To enable non heater wire operation press and hold both the mute and mode buttons simultaneously for 1 second The display will show nhh and the humidifier will confirm with an audible beep Ensure that no heated breathing circuit is connected to the humidifier otherwise the humidifier won t change operation To disable non heater wire mode repeat the above process
24. 2005 Ref 185041340 185041713 internal 6 4 3 Diagnostic Menu for Software Version 7 00 amp 7 21 Display Humidity Compensation HC algorithm Invasive mode compensation range is 0 0 to 3 0 C CSP 37 0 to 40 C Non Invasive mode compensation range is 0 0 to 5 0 C CSP 31 0 to 36 0 C By pressing the Mute and Mode buttons together for 1 second or pressing the Mute and Power buttons together for 1 second the user can respectively move up or down through the settings listed below The humidifier will confirm the change with a double beep 5 0 5 0 C of chamber compensation Non Invasive mode only 4 0 4 0 C of chamber compensation Non Invasive mode only 3 0 3 0 C of chamber compensation 2 0 2 0 C of chamber compensation 1 0 1 0 C of chamber compensation 0 0 0 0 C of chamber compensation No compensation A Automatic humidity compensation mode Invasive mode 0 to 3 C in 0 5 C steps TL o Non invasive mode 0 to 5 C in 1 C steps O Cp y Chamber set point in 0 1 C resolution eg 37 0 Invasive mode range 35 5 to 40 C Non Invasive mode range 31 0 to 36 0 C Cdc Chamber Duty Cycle CHP Chamber Power Flow ratio W LPM hP Heater Plate Temperature 1 C Flo Gas Flow Rate 0 1 LPM Unknown Flow flow measurement not started FLr Gas Flow Rate Range Unknown Flow flow measurement
25. 35 Figure 7 2 Showing PCB fasteners 7 2 2 Replacing Fuses 1 Open the case section 7 2 1 2 The fuses can now be accessed See Figure 7 3 for the location of the fuses on the power PCB Figure 7 3 Showing location of the fuses on power PCB The four fuses have the following ratings MR850 Model Number Supply Voltage Fuse Type Part Number MR850Axx 230 V 1 A 250 V FastBlow 999 830 001 4 A 125 V FastBlow 999 830 017 2 A 250 V FastBlow 999 830 009 2 A 250 V FastBlow 999 830 009 MR850Pxx 127 V 1 A 250 V FastBlow 999 830 001 4 A 125 V FastBlow 999 830 017 3 A 250 V FastBlow 999 830 012 3 A 250 V FastBlow 999 830 012 36 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal MR850 Model Number Supply Voltage Fuse Type Part Number MR850Jxx 115 V 1 A 250 V FastBlow 999 830 001 4 A 125 V FastBlow 999 830 017 3 A 250 V FastBlow 999 830 012 3 A 250 V FastBlow 999 830 012 MR850Gxx 100 V 1 A 250 V FastBlow 999 830 001 4 A 125 V FastBlow 999 830 017 3 A 250 V FastBlow 999 830 012 3 A 250 V FastBlow 999 830 012 WARNING Be sure to replace the fuse with the correct rating and type Do not under any circumstances replace F2 with anything other than a fast blow fuse of the type and rating specified as serious injury could result 3 Replace fuse 4 Close the case section 7 2 8 7 2 3 Replacement of Printed Circuit Boards PCBs 1
26. 5 Ref 185041340 185041713 internal 3 Specifications 3 1 Mechanical Dimensions 140 mm x 173 x 135 without chamber fitted Weight 2 8 kg without chamber fitted Approx 3 1 kg with chamber fitted and filled with water 3 2 Electrical MR850 Model Number Supply Voltage Supply Current MR850Axx MR850Pxx MR850Jxx MR850Gxx Supply Frequency 50 or 60 Hz Sine Wave Heater Plate Capacity 150 W at nominal mains voltage HP Thermal Cutout 118 6 C Heater Wire Supply 22 5 V 2 73 A Max 50 or 60 Hz Maximum Heater Wire Load 8 0 O 3 3 Temperature Range 3 3 1 Heater Wire Mode Invasive Mode Chamber Set Point 35 5 to 37 C Chamber Set Point 35 5 to 40 C versions 5 33 5 34 5 45 5 70 6 00 7 00 7 21 Chamber Set Point 35 5 to 42 C versions 7 14 7 17 amp 7 22 Airway Set Point 35 to 40 C Non Invasive Mode Chamber Set Point 31 C Chamber Set Point 31 to 34 C versions 5 33 5 34 5 45 5 70 6 00 Chamber Set Point 31 to 36 C versions 7 00 7 14 7 17 7 21 7 22 Airway Set Point 28 to 34 C 3 3 2 Non Heater Wire Mode Invasive Mode Airway Set point 37 C chamber temperature limited to 66 C Non invasive Mode Airway Set point 31 C chamber temperature limited to 66 C Display Three digit 14 mm 7 segment LED Range 10 to 70 C Accuracy 0 3 C in 25 to 45 C temperature range 3 3 3 Alarm Parameters High Temperature Alarm Causes an immediate audible and visib
27. EEPROM version is older than the ROM version or E06 EEPROM version is newer than the ROM version will be given Press the Mute button to confirm that the software is to be changed to the version in the ROM Once the Mute button is pressed the software version is changed and the MR850 is automatically restarted 3 Complete a full performance test section 8 7 2 7 Replacing the Mains Cable 1 Open the case section 7 2 1 2 Unscrew the three mains cable wires from the terminal blocks on the power PCB see Figure 7 4 and cut the cable tie on the PCB 3 Slide the mains cable retainer away from the rear of the case 4 Replace the power cord and affix to the case by forcefully pushing the retainer back into position towards the rear of the case 5 Attach the 3 mains cable wires to the terminal blocks on the power PCB see table below for correct mains cable wiring and attach the phase and neutral wires with a new cable tie 115 100 V or Brown or Blue or Green Yellow 230 127 V 230 V WARNING When attaching the mains cable wires ensure that the correct polarity of the mains wiring is followed The table given above only applies to power cords supplied by Fisher amp Paykel Healthcare 6 Close the case section 7 2 8 7 2 8 Closing the case 1 Make sure that all harnesses that were previously disconnected have been reconnected If the mains wiring was disconnected during servicing check that the main
28. Fisher Paykel HEALTHCARE MR850 RESPIRATORY HUMIDIFIER Technical Manual REVISION J Copyright 2005 Fisher amp Paykel Healthcare Ltd Auckland New Zealand Fisher 8 Paykel Healthcare Head Office PO Box 14 348 Panmure Auckland 1134 New Zealand Email info fphcare com Web Site www fphcare com Tel 64 0 9 574 0100 Fax 64 0 9 574 0158 Australia 36 40 New Street Ringwood Victoria 3134 Australia Tel 61 0 3 9879 5022 Fax 61 0 3 9879 5232 Germany Hundsbergerstrasse 45 73642 Welzheim Germany Tel 49 0 7182 93777 0 Fax 49 0 7182 93777 99 France Benelux Parc Silic Bal F 10 Avenue de Quebec Silic 512 Villebon 91946 Courtaboeuf Cedex France Tel 33 0 1 6446 5201 Fax 33 0 1 6446 5221 USA Suite 101 22982 Alcalde Drive Laguna Hills California 92653 USA Tel 1 949 470 3900 Fax 1 949 470 3933 Toll Free 800 446 3908 UK and Ireland European Authorised Representative Unit 16 Cordwallis Park Clivemont Road Maidenhead SL6 7BU United Kingdom Tel 44 0 1628626 136 Fax 44 0 1628626 146 2 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal TABLE OF CONTENTS 1 1 1 2 1 3 1 4 3 1 3 2 3 3 3 4 3 5 3 6 4 2 4 3 4 4 4 5 5 2 5 3 INTRODUCTION ot a onan 7 ABOUT THIS IANA Ei AR AAA AAA Rs GLOSARIO ia ad DEFINITION S 8 itt c Oak Mahe ea A 8 PRODUCT APPLICATION O oO e D
29. PM Unknown Flow flow measurement not started CHP O A l Gas Flow Rate Range Unknown Flow flow measurement not started no No flow Stand by Lo Low flow lt 3 LPM In Intermediate flow 2 to 17 LPM Hi High flow gt 13 LPM Ventilated flow detected HS Airway temperature set point 0 1 C Airway Duty Cycle During selection of this menu and while an airway probe out test is active the airway probe indicator will light Water out number used to detect the presence of chamber water calculated from chamber power heater plate temp chamber temp During selection of this menu the water out indicator will light if the water out number falls below a dry chamber threshold Last Alarm State the display will blank and the humidifier s last alarm will be shown on the indicators To clear LAS press and hold the mute and mode buttons for 1 second The humidifier will beep when LAS has been cleared Last Fault State refer to section 6 3 To clear LFS press and hold the mute and mode buttons for 1 second The humidifier will beep when LFS has been cleared Press the mute button to cycle to the start of the menu or the diagnostic menu will automatically exit after 6 seconds 34 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal 7 Servicing Procedures 7 1 General Considera
30. Product Change History 8 1 2 Humidifier Calibration Check Equipment Required 1 August 2005 Removed the reference to the service kit 10 Spare Parts Added parts 17 to 22 12 1 Introduction Updated how to get View850 and the serial cable 12 2 Installation Changed View850 installation from floppy disk to CD 12 3 1 Viewing Humidifier Data Updated how to run View850 and how to change the com Port Add section 13 EMC Information MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal Description of Technical Manual Change Date Issued 1 4 Product Application Add warning to connect humidifier only to a 1 November 2005 pure sine wave power source 5 2 Safety Check add CAUTION and NOTE 6 3 See manual Error codes Elaborate the fault description 8 1 5 Humidifier Warm up and Control Check Change test flow rate from 20 10 SLPM to 10 5 SLPM Reference test limits to airway and chamber set temperatures rather than fixed values 8 2 2 Probe Flow Accuracy Test Change test flow rate from 20 2 SLPM to 10 1 SLPM Check flow measurement is now between 5 and 15 LPM 10 Spare Parts add items 23 24 25 26 Note 1 Fisher amp Paykel Healthcare have a policy of continued product improvement and reserve the right to change specifications without notice 2 This Technical Manual covers software version 5 45 5 70 6 00 7 00 7 14 7 21 7 22 7 23 and PCB Revision C D and E Re
31. TT A ll Y Y Y Y SY ransfor 1g Mt SS Thermal Prima Cutout amp Transformer A Secondary y Mains Cord Phast Mains Cord Neutral HA Heater Plate and Mains Cord Earth Figure 7 4 Showing Humidifier Power PCB wiring 7 2 4 Replacement of Transformer 1 Open the case section 7 2 1 2 Disconnect the transformer primary and secondary harnesses attached to the power PCB 3 Unscrew the four mounting screws fixing the transformer and remove the transformer from the case 4 Place the new transformer inside the case and mount using the four screws Connect transformer primary and secondary harnesses to the power PCB 6 Close the case section 7 2 8 on 7 2 5 Servicing the Heater Plate Resetting the thermal cutout 1 Open the case section 7 2 1 2 Check the thermal cutout on the heater plate by pushing the red button with a pen or small screwdriver see Figure 7 5 Figure 7 5 Showing location of thermal cutout 38 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 3 If the thermal cutout clicks when pushed it has been previously activated and is now reset NOTE If the heater plate is still hot it must be allowed to cool sufficiently before the thermal cutout will reset 4 Close the case section 7 2 8 Replacing the heater plate thermistor NOTE A Heater plate thermistor service kit is required Part Number 043 041 254
32. The temperature alarm is treated differently see section 4 5 4 3 Temperature Display The front panel shows the lower of the chamber or airway temperatures This temperature gives an indication of the dew point in C of the gas that is being supplied to the patient The dew point of a gas is the best indication of both its humidity and energy content Under normal operation the displayed temperature will be the chamber temperature as its control set point is lower If the temperature is above 70 C Hi will be displayed If the temperature is below 10 C Lo will be displayed If HC mode has been enabled the decimal point on the temperature display will flash 4 3 1 Showing Chamber and Airway Temperature Both the chamber and airway temperature can be displayed by pushing and holding the mute button for 1 second The temperatures are displayed in the following sequence 1 Chamber temperature is displayed until two seconds after the mute button is released The chamber probe indicator see section 4 4 will also light to show which temperature is being displayed 2 The display will blank and then the airway temperature will be displayed until two seconds after the mute button is released The airway probe indicator will also light see section 4 4 to show which temperature is being displayed 3 The temperature display will blank again and revert to normal operation 4 4 Setup Indicators The MR850 setup indicators placed on
33. USA only 7 23 31 May 2004 2004 85JHU006084 Added Non heater wire operation PTS access through serial command Humidifier model protection Remove HC Software release USA only E 7 23 5 July 2004 2004 85JHU008300 Release of new PCB capable of selective soldering 60 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal History Change for model GJU Software Introduction Serial Number Comments a Version 4 e 19 September 1998 September 1998 E First production release First production release release am 22 22 October 1998 1998 Software upgrade 12 1999 9985xxx00053 Release of new PCB to accommodate change in temperature probe circuit redesign 53 5May1999 5May1999 Software upgrade Software upgrade 14 January 2000 2000 85xxx00028 Release of new PCB to improve manufacture 3 April 2000 2000 85xxx01661 Software upgrade for low flow control stability 25 July 2000 2000 85xxx02806 Software upgrade allowing Neonatal volume ventilation capability Manual Temperature Compensation TC implemented 11 October 2000 2000 85xxx04212 Software upgrade to improve EMI immunity 545 19 February 2001 19 February 2001 2001 2001 85xx00427 85xxx00427 Software upgrade Software upgrade button Enable low 15 November 2001 temperature alarm in stand by 2 April 2002 2002 85xxx00976 Software upgrade Improve HC speed in Non invasive mode F amp
34. alen el 8 HUMIDIFIER SY VIB OLS do DO 9 SPECIFICATION Scotia aaa E 10 MECHANICAL siorse n a t 10 ELE Rd al de 10 TEMPERATURE RANGE tai aid 10 331 Healer Wire MOCO sicsirbseri irn E EE deeded ican cladedeamubaceledeatdeds 10 3 3 2 Non Heater Wire Mode cul dit 10 SIS Alam PINO a E ede ehh eae ENON 10 PERFORMANCE eaaa a A E A a A a do o e 11 TRANSPORT AND STORAGE ENVIRONMENTAL CONDITIONS ccoocccccocnnononcncncnnnononnnnonononononononnononononaninenonons 11 STANDARDS AND APPROVALS oaran TE as 11 OPERATING MODES AND CONTROLS 2 00 00 ada 12 FIUMIDIFIER OPERA TION cic isos deter da OS 12 Att AHONT MCO AUO ria nah ete dies nec acs cues E access cane coueees 12 4 7 2 INONeHEaler Wire OOOO ad 13 Bde Sang DV OPEN A A 13 AAA dPOWCFUD SECQUCI CG aana a cdas 14 4 1 5 Humidity Compensation HC MONE ccoooncccocccccccccnncncconnonccnanonononconocononnnonanonnonanonnnannnnnnns 14 4 4 6 Brealhning Creul RE COOMIUON a a 15 FLU MIDIFIER C ON TROLG e e ee E 16 BT Fowo BUT OM srt stn ceecseuee ae Divas ene ieee etd ene a ea SRN 16 422 111910 18 140 tee ne 5 0 eS eT Eo Cea 16 E A Ao ea 17 TEMPERATURE DISPLAY AA AA A eeu iecie ss 17 4 3 1 Showing Chamber and Airway Temperature ooccococccccocnncononoconononononononnnnononononononanononaninnnnnns 17 SE TOP INDICATORS A A tds 17 4 4 1 Heater Wire connector cccccccccssccccnscnsusensusccsusccusensusensusenueensusensusesusessusensusensuseagassansenausenans 17 4 4 2 Temperature Fl
35. althcare representative for the appropriate part number Single ROM pack 32 ROM Pack _ tt AR pe Figure 7 8 Showing location of U3 Open the case section 7 2 1 Remove ROM integrated circuit U3 Figure 7 8 using appropriate tools Place new ROM into the empty socket ensuring correct orientation Close the case section 7 2 8 Turn the humidifier upside down use a non conducting tool to hold the production test button down This button is accessible through the right air vent slot when looking at the rear of the humidifier See Figure 7 9 ON eae IIS WARNING Never use an electrically conducting tool to depress the production test button as there are live mains voltages inside the humidifier gt NE Te 9 ule Figure 7 9 Showing Location of the Production Test Button re 42 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 6 Apply mains power to the humidifier while keeping the production test button depressed The display should read PTS This ensures that the new software version number will be properly updated in the EEPROM 7 Turn off the mains power to the humidifier and remove the tool 8 Check that the humidifier powers up normally and complete a full performance test section 8 An alternative method for software versions 7 21 onward 1 Perform steps 1 to 4 as above 2 Apply mains power to the humidifier An error code E05
36. ar case replacement kit ADU model Rear case replacement kit AEA model Rear case replacement kit AEK model Rear case replacement kit AEU model Rear case replacement kit AFU model Rear case replacement kit AGU model Rear case replacement kit ALU model Rear case replacement kit ANU model Rear case replacement kit ARU model Rear case replacement kit JHU model Rear case replacement kit JSU model Rear case replacement kit PEU model Rear case replacement kit GJU model Electronics PCB Assembly Mounting Tongue Nut Mounting Tongue Washer Mains Cable Collet Case Screw Mains Cord USA Plug Right Angle 115 V Mains Cord USA Plug Straight 100 V Mains Cord NZ Australian Plug 230 V Mains Cord UK Plug 230 V Mains Cord European Schuko Plug 230 V Mounting Tongue Mounting Tongue Bolt Transformer 230 V Transformer 127 V Transformer 115 V Transformer 100 V Equipotential Stud Kit Option Finger guard MR850 blue Spring for finger guard Socket heater wire 4 way Socket temperature flow probe 6 way Socket retaining ring yellow Socket retaining ring blue Side panel Plastic rivet Rubber button Button retaining ring Refer to the exploded Revision J Issued November 2005 Ref 185041340 185041713 internal 91 52 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal Heater Plate Assembly Item Pa
37. aration electromagnetic emissions The MR850 is intended for use in the electromagnetic environment specified below The customer or the user of the MR850 should assure that it is used in such an environment Emissions test Electrostatic discharge ESD IEC 61000 4 2 Electrical fast transient burst IEC 61000 4 4 Surge IEC 61000 4 5 Surge IEC 61000 4 5 Voltage dips short interruptions and voltage variations on power supply input lines IEC 61000 4 11 Power frequency 50 60 Hz magnetic field IEC 61000 4 8 IEC 60601 1 test level 6 kV contact 8 kV air 2 kV for power supply lines 1 kV for input output lines 1 kV differential mode 2 kV common mode 1 kV differential mode 2 kV common mode lt 5 UT gt 95 dip in Ur for 0 5 cycle 40 UT 60 dip in Ur for 5 cycles 70 UT 30 dip in Ur for 25 cycles lt 5 UT gt 95 dip in Ur for 5 sec Compliance level 6 kV contact 8 kV air 2 kV for power supply lines 1 kV for input output lines 1 kV differential mode 2 kV common mode 1 kV differential mode 2 kV common mode lt 5 UT gt 95 dip in Ur for 0 5 cycle 40 UT 60 dip in Ur for 5 cycles 70 UT 30 dip in Ur for 25 cycles lt 5 UT gt 95 dip in Ur for 5 sec NOTE Uris the a c mains voltage prior to application of the test level 58 MR850 Technical Manual Revision J Issued November 2005
38. be replaced 1 2 Glossary Chamber Temperature Flow Probe Airway Probe Chamber Probe Thermistor Chamber Set Point Airway Set Point Heater Wire Adaptor Breathing Circuit Dual Heated Breathing Circuit Single Heated Breathing Circuit PCB Heater Wire Inspiratory Limb Device that allows gas to be to be heated and humidified by passing it over heated water Sensor assembly for measuring temperature and flow of respiratory gases traveling through the breathing circuit Consists of a chamber and airway probe Sensor assembly for measuring gas temperature at the end of the inspiratory limb Sensor assembly for measuring gas flow and temperature at the outlet of the humidification chamber A temperature sensitive resistor placed inside the chamber and airway probes The temperature that the humidifier attempts to maintain at the chamber probe port The temperature that the humidifier attempts to maintain at the airway probe port Electrical connector between the breathing circuit and the humidifier Tubing that carries respiratory gases to and from the patient A breathing circuit that is heated by means of heater wires in both the expiratory and inspiratory limbs A breathing circuit that is heated by means of a heater wire in only the inspiratory limb Printed Circuit Board Wire inside the breathing circuit which heats the respiratory gases The section of the breathing circuit that takes the insp
39. cal Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 10 Spare Parts Should any parts of the humidifier require replacement the following parts list is provided diagram on the opposite page for part identification Item 1 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Part Number 043 041 247 043 041 248 043 042 575 043 041 249 662 040 058 043 042 068 043 041 334 043 042 067 043 042 578 336 060 143 614 061 141 043 042 267 043 042 268 043 042 269 043 042 270 043 042 271 043 042 272 043 042 273 043 042 274 043 042 275 043 042 276 043 042 277 043 042 278 043 042 454 043 041 250 621 040 524 622 040 512 693 041 483 614 040 120 095 428 322 095 428 869 095 428 317 095 428 569 095 428 323 693 041 482 614 063 026 043 041 304 043 042 576 043 041 305 043 041 306 043 041 336 693 041 487 662 040 067 341 040 560 341 040 561 341 040 559 341 040 558 693 040 783 336 060 148 693 041 486 653 040 124 MR850 Technical Manual Description 100 V Heater Plate Assembly 115 V Heater Plate Assembly 127 V Heater Plate Assembly 230 V Heater Plate Assembly Heater Plate Spring Front Case Replacement kit 115 V J models Front Case Replacement kit 230 V A models Front Case Replacement kit 100 V G models Front Case Replacement kit 127 V P models Heater Plate Case Screw Transformer Mounting Screw Re
40. cond the humidifier will beep twice and the setting will increase Release both buttons 4 To increase again repeat step 3 To decrease the setting press the mute and power buttons for 1 second 5 To exit the menu release all buttons the menu will continue to cycle until end is displayed the menu will automatically exit Temperature Display To alert users during normal operation that either manual or automatic HC mode has been enabled the decimal point on the temperature display will flash Each of the two modes can be further identified by the flash rate where auto HC mode has a slower flash rate than manual HC mode Note The displayed temperature may also be higher than normal indicating up to 39 C the amount of compensation present 4 1 6 Breathing Circuit Recognition Software version 7 00 onward Fisher amp Paykel Healthcare has developed a range of breathing circuits that offer optimum performance for the type of treatment selected while working within recommended operating conditions Some of these breathing circuits require a slightly modified controller to optimize performance To do this the MR850 must first recognize what type of delivery circuit has been MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 15 connected Breathing circuit recognition is performed via three electrical connections on the heater wire adaptor Re configuring the electrical connection p
41. d in section 8 2 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 21 5 2 Safety Check The unit should be tested to the current medical electrical standards for in house testing for each specific country example refer to AS NZS 3551 for Australia and New Zealand CAUTION Permanent damage to this humidifier will result if the serial port is used as a ground point during electrical safety testing NOTE The correct ground test point location is on the heater plate front underside edge as shown in Figure 5 1 where the insulating anodizing layer has been removed Figure 5 1 Showing the correct location of ground test point on the heater plate 22 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 5 3 Cleaning Instructions 5 3 1 MR850 Humidifiers It is recommended that only the following cleaners be used on the MR850 as at the time of revision of this technical manual The disinfectants in the list below have been tested to ensure that no damage will result to the outer plastic or metal components of the humidifier 1 Disconnect the humidifier from any electrical outlet 2 Clean the humidifier with one of the following recommended disinfectants using a damp cloth Isopropyl Alcohol Normal dishwashing detergent NOTE Follow the manufacturer s instructions carefully Use the correct dilution of the disinfectant DO NOT immerse the h
42. e between the 2 contacts on the heater plate element connector this is the large three pin connector The resistance of the heater plate element should measure the same as outlined in the table below MR850 Model Number Supply Voltage Heater Plate Resistance MR850Axx 353 12 Ohms MR850Pxx 108 3 Ohms MR850Jxx 88 3 Ohms MR850Gxx 67 2 Ohms If the measured resistance is outside this range replace the heater plate element steps 4 to 9 If the heater plate element is within specification go to step 10 NOTE If the heater plate element requires replacing a heater plate element service kit is required see Section 10 Spare Parts 4 Remove the two visible screws holding the heater plate element reflector Remove the shield making sure the washers are not lost Unscrew the last four screws on the element cover Figure 7 7 40 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 10 11 N OA D Eroa 10 11 Remove the heater element leaving the mica insulator in place Insert the new element into position making sure the insulating mica is between the element and the heater plate Replace the element cover using the four screws that were previously removed Replace the element reflector making sure the washers that separate the reflector from the cover are placed back into position Screw into place Place the heater plate assembly back into positi
43. er to section 6 3 To clear LFS press and hold the mute and mode buttons for 1 second The humidifier will beep when LFS has been cleared Press the mute button to cycle to the start of the menu or the diagnostic menu will automatically exit after 6 seconds MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 33 6 4 6 Diagnostic Menu for Software Version 7 23 Display Cct Connected breathing circuit identification S Standard inspiratory heater connected C Coaxial inspiratory heater connected E m heater connected No heaters detected while under heater wire control Non Heater Wire Operation To enable non heater wire operation press and hold both the mute and mode buttons simultaneously for 1 second The display will show nhh and the humidifier will confirm with an audible beep Ensure that no heated breathing circuit is connected to the humidifier otherwise the humidifier won t change operation To disable non heater wire mode repeat the above process or connect a heater breathing circuit Chamber set point in 0 1 C resolution eg 37 0 Invasive mode range 35 5 to 42 C Non Invasive mode range 31 0 to 36 0 C Chamber Duty Cycle During selection of this menu and while a chamber probe out test is active the chamber probe indicator will light Chamber Power Flow ratio W LPM Heater Plate Temperature 1 C Gas Flow Rate 0 1 L
44. erature Invasive mode only has been low for a period of time High temperature The humidifier will immediately alarm if at any time the displayed temperature exceeds 41 C or if the airway temperature exceeds 43 C If either of these high temperature alarms occur the humidifier will immediately shut down the heater wire and heater plate Low Temperature The low temperature warning visual only and alarm visual and audible are active only when the humidifier is in Invasive mode Both are disabled during warm up conditions The warning alerts the user that low temperature is being delivered to the patient The alarm alerts the user that a low level has been delivered to an Invasive patient for too long The low temperature warning and alarm operate by monitoring the displayed temperature If the displayed temperature is below 35 5 C for 25 seconds the temperature indicator will light and act as a warning to the user If the temperature remains below this level for too long then a Temperature Alarm is activated The time taken for the humidifier to alarm is dependent on how far below the 35 5 C threshold the displayed temperature is Figure 4 3 shows the relationship between temperature a temperature warning and the time before a temperature alarm MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 19 Temperature Time Exposure of Humidity Alarm pa Warning Threshold Ma a
45. fer to previous revisions of the Technical Manual for earlier software and PCB versions 6 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal Introduction 1 1 About this Manual This manual is intended for qualified service personnel who will perform maintenance and servicing on the Fisher amp Paykel Healthcare MR850 Respiratory Humidifier This manual covers the product specifications includes a maintenance schedule and provides the necessary information required for servicing NOTE Some software may not be available in your country Refer to your local Fisher amp Paykel Healthcare representative for the appropriate software version Maintenance procedures should be carried out at regular intervals as recommended in the maintenance schedule to ensure that the humidifier and its accessories are working correctly If a fault should occur with the humidifier follow the troubleshooting guide section 6 in order to find the most likely cause If the unit requires servicing make sure the servicing procedures are followed in order to prevent damage to the humidifier After service or as part of the maintenance schedule a humidifier performance check should be completed Due to the nature of the electronics contained within this humidifier it is not recommended that the printed circuit boards be serviced at component level Instead if the PCBs are found to be malfunctioning they should
46. he MR850 operating manual and check the humidifier s setup 8 2 Probe Accuracy Check A probe accuracy check is used to test for the correct operation of the temperature flow probe A Probe accuracy check consists of the following tests 1 Probe Temperature Accuracy Test section 8 2 1 2 Probe Flow Accuracy Test section 8 2 2 8 2 1 Probe Temperature Accuracy Test This test is used to determine the temperature accuracy of the temperature flow probes that are used with the MR850 humidifier Equipment Required MR850 Humidifier Flow Temperature Probe Accurate Thermometer Accuracy 0 5 degrees Container of water at approximately 40 C or a stirred water bath at 40 C 1 Perform a humidifier calibration test as outlined in section 8 1 2 to make sure the humidifier is reading temperature correctly ignore this step if recently completed 2 Place both the airway and chamber probes in a container of water at approx 40 C along with the accurate thermometer 3 Make sure the water is constantly stirred and wait approximately 30 seconds for the temperature to stabilise 4 Enter the service menu refer section 8 1 1 5 Select service mode number 4 Temperature Probe Check by pushing the mute button when 4 is displayed 6 Plug the probe under test into the humidifier NOTE if a probe fault condition exists the humidifier will alarm at this time 7 The chamber temperature will be displayed pressing the
47. heck and replace probe if Section 8 2 required Is the probe connector correctly plugged into the humidifier Plug in probe as required Check that the circuit is connected correctly to the ventilator gas flow could be reversed through the humidifier Perform a humidifier calibration check Section 8 1 2 Replace temperature probe and re test If the alarm Section 8 2 condition disappears the temperature probe is faulty Discard faulty probe Humidifier faulty Replace PCBs Section 7 2 3 The humidifier has been unable to maintain temperature over a period of time 1 2 Gas flow has been disconnected from the humidifier either reconnect gas flow or turn the humidifier off Check that the gas flow rate is within specification of the humidifier and accessories being used Check for drafts around the breathing circuit This can be caused by fans or room air conditioning If this is found to be the cause the breathing circuit should be shielded from the ambient airflow Check that the circuit is connected correctly to the ventilator gas flow could be reversed through the humidifier WARNING Never cover the breathing circuit 9 6 Check for excessive condensate pooling in the breathing circuit Drain circuit if necessary Humidifier or probe faulty Complete humidifier amp probe Section 8 performance test Replace probe or service humidifier as required Check that there is sufficient water in
48. hing circuit or humidifier settings Increasing the length of breathing circuit between the ventilator and the humidification chamber will assist in cooling the gas before it enters the chamber and improve humidity output If beading condensate does not form humidity output can be further improved by increasing the humidifiers chamber set point This can be achieved by accessing the HC mode or Tc in the Diagnostic Menu see section 6 4 and either manually selecting a level of chamber temperature compensation or letting the automatic mode do it for you Automatic Humidity Compensation When automatic HC mode is selected the humidifier calculates the power required to adequately humidify the gas flow through the chamber If the minimum power level is not met 14 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal then the chamber set point will automatically be increased in 0 5 C steps 1 C steps for non invasive mode until the minimum power is achieved The maximum amount of compensation applied is either 3 or 5 C depending on the mode and software version section 6 4 Diagnostic Menu details how compensation is applied for each software version If conditions improve and too much power is being applied then the MR850 will automatically reduce the chamber set temperature NOTE Excessive condensate may form in the breathing circuit if the auto HC function is used with turbine driven ventilato
49. ins on a heated circuit and the way it connects to this adaptor identifies the type of heated circuit In this way three separate heater wire circuits can be identified by the MR850 4 2 Humidifier Controls 4 2 1 Power Button The humidifier will power on if this button is held down briefly but must be held for one second to turn the humidifier off Note For software version 5 45 5 70 the power button need only be pressed briefly to turn off the MR850 CAUTION Although the display is not illuminated the unit may still be energized Be sure to disconnect power from the MR850 before servicing After power on the humidifier starts an internal diagnostic routine which checks for possible problems in the humidifier setup If everything is working correctly normal control is initiated 4 2 2 Mode Button E Rr When held down for one second the mode button toggles the humidifier between Non Invasive and Invasive mode The Mode indicator LED shows the user which mode is selected Invasive mode is for use with patients whose upper airways have been bypassed by either a tracheostomy or endotracheal tube In this mode of operation the humidifier attempts to deliver optimal humidity to the patient 37 C 100 RH This mode is the default mode on power up of the humidifier The humidifier normally controls the chamber outlet temperature to 37 C and the airway temperature to 40 C maintaining a 3 C temperature gradient
50. ion See manual Check that the mains supply is within specification indicator lit not Provide adequate mains supply if required flashing _ If PtS is displayed Section 6 1 Replace PCBs Section 7 2 3 Humidifier will not Humidifier plugged into mains supply turn on with on off Check that the mains supply is within specification button and no Provide adequate mains supply if required indicators are Itt Remove mains power and check the fuses Section 7 2 2 Check continuity of mains power cord Replace as Section 7 2 7 necessary Check the transformer windings are not open circuit Section 7 2 4 Primary Winding Red wires Secondary 10v winding White wires Secondary 22v winding Yellow wires If any windings are open circuit replace the transformer 6 Replace PCBs Section 7 2 3 calibration check representative for calibration or replace PCBs Accuracy Check Unit fails to reach 1 If the chamber outlet temperature was low the heater plate Section 7 2 5 temperature in element should be checked Replace element as humidifier control necessary check Section 2 Ifthe airway temperature was low replace breathing circuit 8 1 4 and re test 3 Replace PCBs Section 7 2 3 26 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal 6 3 See Manual Error Codes The following is an explanation of the error codes that are displayed in conjunction with the See Manual i
51. ire triac has shorted Heater wire sense circuit has failed E23 Heater wire voltage measurement circuit faulty E25 Transistor Q17 is not turning on E26 Transistor Q16 is not turning on E27 The heater wire relay is short circuited E28 Mains voltage measurement is uncalibrated section 8 1 3 E29 The heater plate thermistor is short circuited E2A The heater plate thermistor is open circuit Heater plate element circuit has malfunctioned is not turning on Element is open circuit Heater plate triac or driver faulty Heater plate relay is faulty The heater plate element is not turning off Heater plate triac circuit faulty E30 Power on off button stuck on E2D m N E31 Mute button stuck on E32 Mode button stuck on E40 Unit not functional tested at time of manufacture MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 27 Error Description of Fault Failed the functional test at time of manufacture 42 Was not stress tested during manufacture E Failed the stress test during manufacture 43 Not tested on functional tester 2 Failed production functional tester 2 E4A EEPROM write error occurred EEPROM write verify error occurred EEPROM read error occurred Flow circuitry not functioning Flow circuitry shorted on 28 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal 6 4 Diagnostic Menu By pressing the
52. ired gases to the patient MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal T Expiratory Limb The section of the breathing circuit that takes the expired gases from the patient 1 3 Definitions NOTE A NOTE provides important information or explanation of procedures or conditions which may otherwise be misinterpreted or overlooked CAUTION A CAUTION statement designates the possibility of damage to this or other equipment if a procedure is not followed exactly WARNING A WARNING statement refers to conditions with a possibility of personal injury if a procedure is not followed exactly 1 4 Product Application The MR850 is a respiratory humidifier designed for use in hospital intensive care units It is used to provide optimum humidity to respiratory gases delivered to patients via endotracheal tubes or face masks Refer to the Respiratory Humidification Product Catalogue or your local Fisher amp Paykel Healthcare representative for a list of approved accessories WARNING The use of breathing circuits chambers or other accessories which are not approved by Fisher amp Paykel Healthcare may impair performance or compromise safety Ensure that Invasive mode is set for patients that have bypassed airways Ensure maintenance of grounding integrity by connection to a hospital grade receptacle Always disconnect supply before servicing When mounting a humidifier adjace
53. irway probe and controlling the power delivered to the heater wire Under normal conditions the gas is heated to 40 C in the invasive mode 34 C for the non invasive mode An optional second heater wire located in the expiratory limb minimises condensate in this limb 12 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal 4 1 2 Non Heater Wire Operation Software version 7 23 only Ventilator Gas Supply RT134 Breathing Circuit Temperature Probe MINO S _ IN Airway Probe gt MR290 Chamber U Water trap MR850 Humidifier Figure 4 2 Typical Non Heater Wire Humidifier Setup In this application the MR850 maintains the airway temperature at the desired set point invasive 37 C or non invasive 31 C by heating the chamber of water through the heater plate As the gas cools considerably down the unheated circuit a water trap circuit must be used to collect the resulting condensate Activating Non Heater Wire Operation Refer also to the diagnostic menu in section 6 4 1 Turn on the humidifier with NO heated circuit connected and mute the heater wire alarm 2 Access the diagnostic menu by pressing the mute and mode buttons together for 1 second the display should show two rows of dashes Releasing both buttons will allow the diagnostic menu to cycle automatically 3 Allow the menu to cycle through to cct the circuit identification
54. ith the GREY collet into the temperature flow probe socket of the humidifier Allow the display to stabilize for a few seconds and check the number shown on the humidifier display The table below shows the numbers displayed by the humidifier in this mode TEST PASS FAIL LOW FAIL HIGH Overheat Heater Wire Heater Wire Heater Wire LED OFF LED ON LED ON If the humidifier displays any other value than 100 or if the heater wire indicator is on check that you have the correct calibration probe plugged in otherwise the MR850 PCBs are faulty and they will need to be serviced or replaced refer 7 2 3 Press the power button this causes the Calibration Probe 2 Check to be executed Insert the calibration probe with a BLUE collet into the temperature flow probe socket of the humidifier Allow the displayed value to stabilize for a few seconds Check the humidifier display The table below shows the numbers displayed by the humidifier in this mode TEST PASS FAIL i FAIL a Overheat Heater Wire Heater Wire Heater Wire LED OFF LED ON LED ON If the humidifier displays any other value than 200 or if the heater wire indicator is on check that you have the correct calibration probe plugged in otherwise the MR850 PCBs are faulty and they will need to be serviced or replaced refer 7 2 3 Remove the calibration probe and press the mute button to exit service mode 8 1 3 Humidifier Display Test This test is used to
55. le alarm at a displayed temperature of 41 C or if the airway temperature exceeds 43 C see section 4 3 Temperature Alarm Invasive Mode After 10 minutes 29 5 C causes an audible and visible alarm After 60 minutes 34 5 C causes an audible and visible alarm see section 4 5 NOTE The temperature indicator lights if the displayed temperature drops below 35 4 C initially providing a temperature warning 10 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal Non heater wire operation Invasive Mode Airway temperature lt 29 5 C causes an audible and visible alarm Non invasive Mode Airway temperature lt 26 0 C causes an audible and visible alarm Sound Pressure Level Alarms exceed 50 dBA 1 m 3 4 Performance Invasive Mode Flow up to 60 LPM humidity output gt 33 mg L Non Invasive Mode Flow up to 120 LPM humidity output gt 10 mg L NOTE Performance results with RT100 breathing circuit Maximum System 20 kPa gas leakage at max pressure lt 100 mL minute Operating Pressure Warm up time Less than 30 minutes Recommended ambient 18 to 26 C temperature range CAUTION If operating outside the recommended ambient temperature range consult your local Fisher amp Paykel Healthcare representative or refer section 4 1 5 3 5 Transport and Storage Environmental Conditions Transport Conditions 10 to 50 C Storage Conditions 10 to 50 C 3 6 Standa
56. m up and Control Check This section describes how to check the humidifier s heater control systems This test should be performed if there is a problem with the humidifier or after servicing of the humidifier Equipment Required MR850 Humidifier MR850 Heater Wire Adaptor Flow Temperature Probe Suitable breathing circuit for MR850 for example RT100 Suitable chamber for MR850 for example MR290 filled with water Gas supply constant flow of 10 5 SLPM Standard Litres Per Minute 1 Make sure that the humidifier passes the calibration and display checks refer 8 1 2 and 8 1 3 2 Setup the humidifier as shown in section 4 1 Make sure the chamber probe is correctly inserted and invasive mode selected 46 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal 3 Connect the humidifier chamber inlet to the gas supply and turn the humidifier on 4 Wait approximately 30 minutes for the humidifier to stabilise Chamber and Airway temperatures can be checked by using the display mode section 4 3 1 and set temperatures can be checked by using the diagnostic menu section 6 4 After the humidifier has had time to warm up the temperature at the airway and chamber should be within 0 3 to 1 8 C of their set point with no alarms occurring If any alarms do occur refer to section 6 troubleshooting and determine the cause If the temperatures displayed are out of range then refer to t
57. mute and mode buttons together for 1 second the diagnostic menu is entered indicated by the display of two rows of dashes Releasing both buttons will allow the diagnostic menu to cycle automatically through the menu pausing at each function Pressing the mute button at this time will display the value behind each function for as long as the mute button is held 6 4 1 Diagnostic Menu for Software Versions 5 45 5 70 Temperature Compensation TC algorithm 0 0 C of chamber compensation CSP 37 0 C Lo 1 5 C of chamber compensation CSP 38 5 C Hi 3 0 C of chamber compensation CSP 40 0 C To change the TC value the press the Mute and Mode buttons together for 1 second The humidifier will confirm the change with a double beep Chamber set point in 0 1 C resolution e g 37 0 Chamber Duty Cycle Heater Plate Temperature 1 C Gas Flow Rate 0 1 LPM Unknown Flow flow measurement not started csp OO O IO Gas Flow Rate Range Unknown Flow flow measurement not started no No flow Lo Low flow lt 3 LPM In Intermediate flow 2 to 17 LPM Hi High flow gt 14 LPM Ventilated flow detected OO AP O Ade O Oo SF TC SP dc HP Flo FLr FF Offset temperature difference between the chamber and airway set temperatures SP dc AS FS oF End 0 1 C Airway temperature set
58. n is a registered trademark of Sporicidin International Ltd Rockville MD 20852 USA Sporox is a registered trademark of Reckitt amp Colman Inc 1655 Valley Rd Wayne NJ USA MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 23 6 Troubleshooting 6 1 Operational Problems This section deals with faults that cause the humidifier to alarm This may be caused by incorrect setup faulty accessories or a faulty humidifier Refer below for troubleshooting Symptom Corrective Action See manual Record the displayed error code Section 6 3 indicator flashing with audible alarm See manual If PtS is displayed on the front panel then the production Section 7 2 6 indicator light test mode has been accessed Check the production test permanently on button is not depressed or mode set by serial command o an audible 2 Humidifier faulty Replace PCBs Section 7 2 3 alarm Water Out indicator 1 Check that there is sufficient water in the chamber Refill flashes or replace chamber as necessary Check that the water accompanied by an bag is not empty and the delivery tube is not kinked or audible alarm occluded 2 Check that the water level in the MR290 chamber is not above the marked line Replace chamber if the water is above this line 3 Check that the gas flow rate is within specification of the humidifier and accessories being used Adjust as necessary 4 Has c
59. ndicator flashing A code is not displayed if the microprocessor has stopped functioning see technical problems section 6 2 Error Description of Fault E00 No fault E02 Microprocessor stack overflow RAM fault ROM fault E05 EEPROM version older than ROM version Update EEPROM Refer to Section 7 2 6 E06 EEPROM version newer than ROM version old software Contact Fisher amp Paykel Healthcare E07 Model mismatch with software contact your Fisher amp Paykel Healthcare representative NOTE included in software version 7 14 onward except 7 21 E10 Temperature circuit calibration out of range Range Amp 0 25 5 C E11 E12 E13 Temperature circuit calibration out of range Range Amp 1 34 5 C E14 Temperature circuit calibration out of range Range Amp 2 34 5 C E15 E16 Temperature circuit calibration out of range Range Amp 0 65 0 C Temperature circuit calibration out of range Range Amp 1 25 5 C Temperature circuit calibration out of range Range Amp 2 44 6 C Temperature circuit calibration out of range Range Amp 3 65 0 C E20 Heater wire circuit has malfunctioned heater can not be energized Heater plate thermal cutout tripped section 7 2 5 Heater wire fuse F2 is open circuit section 7 2 2 Heater wire triac or heater wire relay is open circuit E21 Heater wire circuit has malfunctioned heater either can not be de energized or monitoring circuit has failed Heater w
60. not started no No flow Lo Low flow lt 3 LPM In Intermediate flow 2 to 17 LPM HP High flow gt 13 LPM GG Ventilated flow detected ASP Airway temperature set point 0 1 C Adc Airway Duty Cycle Cct Connected Circuit heater identification S Standard inspiratory heater connected C Coaxial inspiratory heater connected E Expiratory heater connected No heaters connected LAS Last Alarm State the display will blank and the humidifier s last alarm will be shown on the indicators To clear LAS press and hold the mute and mode buttons for 1 second The humidifier will beep when LAS has been cleared LFS Last Fault State refer to section 6 3 To clear LFS press and hold the mute and mode buttons for 1 second The humidifier will beep when LFS has been cleared End Press the mute button to cycle to the start of the menu or the diagnostic menu will automatically exit after 6 seconds MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 31 6 4 4 Diagnostic Menu for Software Version 7 14 Display C Humidity Compensation HC algorithm Note HC is inactive while operating under non heater wire control Invasive mode compensation range is 0 0 to 5 0 C CSP 37 0 to 42 C Non Invasive mode compensation range is 0 0 to 5 0 C CSP 31 0 to 36 0 C By pressing the Mute and M
61. nt has been acquired Check that the flow measurement is between 5 and 15 LPM If the flow measurement is outside this range make sure there are no water drops or deposits on the temperature flow probe s glass thermistor and repeat test 10 If the flow measurement remains outside the specified range the probe should be replaced 48 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 9 Recommended Maintenance Checklist This sheet can be copied and used to keep a record of the maintenance procedures carried out on your MR850 Humidifier s and probes Place the serial number and the date that the maintenance was carried out in the spaces provided Refer to section 5 for a description of the maintenance procedures required Humidifier Check Annually Serial Visual Checks Performance Electrical Safety Signature Number nee and Date Mains Cable Calibration Earth Resistance A Heater Plate Check Insulation Resistance 3 Heater Wire 2 Display Check 3 Earth Leakage Adaptor 4 Other tests as required 9 2 Probe Check Every six months Batch ID Visual Checks Performance Checks Signature and Date 1 Check Glass Thermistor 1 Temperature Accuracy 2 Check for Foreign Deposits 2 Flow Accuracy 3 Check Cable for Kinks etc eck Probe Connectors MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 49 Blank 50 MR850 Techni
62. nt to a patient ensure that the humidifier is always securely mounted and positioned lower than the patient The operation of high frequency surgical apparatus shortwave or microwave equipment in the vicinity of the humidifier may adversely affect its function If this occurs the humidifier should be removed from the vicinity of such devices Ensure that both temperature probe sensors are correctly and securely fitted Failure to do so may result in gas temperatures in excess of 41 C being delivered to the patient Do not touch the glass tip of the chamber temperature probe during use Keep black connectors dry at all times Visually inspect accessories for damage before use Normal operation can not be guaranteed if powered from a source other than a pure sine wave such as a square wave inverter 8 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal Humidifier Symbols Caution Hot surfaces may Power On Off stand by exceed 85 C C Type BF A Invasive Mode Attention consult accompanying documents Non invasive mode gt Alternating Current BN Temperature Alarm O Drip proof protection to IPX 1 IQI Serial Port Date of manufacture E Protective Earth D X ES Year month Caution Electrostatic C tick for EMC CG 2078 N Sensitive Device Do not discard x WEEE collection EU only MR850 Technical Manual Revision J Issued November 200
63. oconocononoconononononooonononononononononononaninonons 30 6 4 3 Diagnostic Menu for Software Version 7 00 amp 7 217 ooooooncccccnincccnonccnnococononononononononaninnonononons 31 6 4 4 Diagnostic Menu for Software Version 7 14 amp 7 22 oooooonnccccccicccononocnnonocononononononononaninnaninonons 32 6 4 5 Diagnostic Menu for Software Version 7 23 ooooonccconinocononocononoconononononooonononononononononinonaninonons 34 SERVICING PROCEDURES 030 aaa 35 GENERAL CONSIDERATIONS Susanita di il 35 DIS ASS EE ata ha ensue atten ene ute Eio en Raeetaausewer ato 35 G24 OPEN Ue Case ixicrcas A A 35 Ll IRCDIACING USCS A A da tac 36 1 2 3 Replacement of Printed Circuit Boards PCBS oooncccconccnccconcnnonocconononnonconanonnononconononnnnonanos 37 7 2 4 Replacement of TranstorMer a a tia 38 TZ SSCIVICING TNC Heater Fl AIC ve cotied liado 38 72 0 ASTM NEW SOTW ANC ol 42 Ted dreplacing ne Mains CAS a a 43 152 0 COSMO UIC CaSO scenes ile a ee eect ath ad 43 PERFORMANCE TESTING lt ie ae A do 44 HUMIDIFIER PERFORMANCE TESTING A a iia 44 8 1 1 Entering the Service MenNu ccooonccconncocononocononoocnnoconononononoonononanononanononnnnononononannnnanononaninenanens 44 8 1 2 Humidifier Calibration Check ooccccoccnccccnnccoccnococononononononononononononnonornnnonnnonononononononaninonaninnnons 44 8 1 3 Humidifier Display JT ES da 45 8 1 4 Humidifier Voltage Calibration Check ccoooncccoconnocononocononocononononnonononononononon
64. ode buttons together for 1 second or pressing the Mute and Power buttons together for 1 second the user can respectively move up or down through the settings listed below The humidifier will confirm the change with a double beep 5 0 5 0 C of chamber compensation 4 0 4 0 C of chamber compensation 3 0 3 0 C of chamber compensation 2 0 2 0 C of chamber compensation 1 0 1 0 C of chamber compensation 0 0 0 0 C of chamber compensation NO compensation A Automatic humidity compensation mode Invasive mode 0 to 5 C in 0 5 C steps Non invasive mode 0 to 5 C in 1 C steps C Connected breathing circuit identification S Standard inspiratory heater connected C Coaxial inspiratory heater connected E Expiratory heater connected No heaters detected while under heater wire control Chamber set point in 0 1 C resolution eg 37 0 Invasive mode range 35 5 to 42 C Non Invasive mode range 31 0 to 36 0 C Cdc Chamber Duty Cycle During selection of this menu and while a chamber probe out test is active the chamber probe indicator will light Chamber Power Flow ratio W LPM Heater Plate Temperature 1 C P O Gas Flow Rate 0 1 LPM Unknown Flow flow measurement not started Gas Flow Rate Range Unknown Flow flow measurement not started no No flow Stand by Lo Low flow
65. on ensuring the springs underneath the heater plate are in place Attach to the humidifier case using the three long screws that were previously removed Connect the heater plate element thermistor and thermal cutout harnesses to the power PCB Close the case section 7 2 8 Replacing the Thermal Cutout Open the case section 7 2 1 Disconnect the heater plate element thermistor and thermal cutout harnesses from the power PCB Remove the three screws holding the heater plate see Figure 7 7 Un solder the two black wires attached to the thermal cutout Unscrew fasteners used to secure the thermal cutout and remove Place new thermal cutout in position and fasten using screws provided Depress the thermal cutout s red button to ensure it is reset Solder the black wires that were previously disconnected to the contacts on the new thermal cutout Place heater plate back into position ensuring the springs underneath the heater plate are in place Attach to the humidifier s case using the three long screws that were previously removed Connect the heater plate element thermistor and thermal cutout harnesses to the power PCB Close the case section 7 2 8 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 41 7 2 6 Installing New Software NOTE A software upgrade kit is required Some software may not be available in your country Refer to your local Fisher amp Paykel He
66. ondensate formed on the chamber probe Dry Probe and re insert 5 Temperature probe faulty Complete a temperature and Section 8 2 flow accuracy test on the probe Replace probe as required 6 Humidifier faulty Complete a performance test Service Section 8 humidifier as required Chamber Probe Check that the chamber probe is inserted into the alarm flashes breathing circuit correctly and that the breathing circuit is accompanied by an set up correctly audible alarm _ Check that there is sufficient water in the chamber Refill as necessary Check that the water bag and delivery tube are not kinked or occluded Ensure correct chamber is being used refer Operating Manual Check that the gas flow rate is within specification of the humidifier and accessories being used Adjust as necessary Has condensate formed on the chamber probe Dry probe and re insert Temperature probe or humidifier faulty Complete Section 8 performance tests Replace probe or service humidifier as required Heater wire Check that the heater wire adaptor is correctly plugged into connector alarm the humidifier along with the breathing circuit flashes NOTE The short lead must connect to the inspiratory limb alada by an 2 Replace breathing circuit and re rest Replace heater wire adaptor and check for intermittent connections Re test Humidifier faulty Replace PCBs Section 7 2 3 24 MR850 Technical Manual RevisionJ Issued No
67. ononannonanononaninanans 46 8 1 5 Humidifier Warm up and Control ChecCK ooonccccoccccconcnocononocononocononnononononononononononononaninonaninnnos 46 PROBE ACCURACY CAE e sn oe ando aid 47 8 2 1 Probe Temperature Accuracy TOS ocooonicioniccccncccccnonoconocononononononncnncnnncnnnancnonancnonanononacnnnnns 47 9 2 2 AITODC FIOW ACCUACY TO Mai dai da area 47 RECOMMENDED MAINTENANCE CHECKLIST cccssccccssecccssecccssenecsnsnecsnesennssensssecanssenanssesansnens 49 HUMIDIFIER CHECK ANNUAL a did 49 PROBE CHECK EVERY SIX MONTHS ist AAA A a 49 SPARE PARTS it a a don 51 CALIBRATION PROBE a eo en a adn e e ne 55 SERIAL PORT amp LOGGING SOFTWARE 1 1ssccsercconenccnnnescneneneneneronansranansenenenennesenenenenanananansess 56 INTRODUCTION sirinati aa nE RT ANAE E das 56 INSTALLATION E di DA A O ee 56 OPERATING INSTRUCTIONS cds 56 12 31 Viewing HUARTE Data ee oe ee 56 12 3 2 Logging Humidifier Data tO Fil8 occcoconcocononocononoconnnconononononononononannonononoonononanononaninenanoss 5 EMCINFORMATION lt lt sh veticne Sale hsb heaton ar r Retin eee 58 PRODUCT CHANGE HISTORY oes ae ese eee 60 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal Revision Description of Technical Manual Change Date Issued A First release technical manual 12 Jan 1999 Covers Revision A PCB s ONLY Second release technical manual 6 May 1999 Covers Revision C and later PCB s ONLY
68. or pins Ends Connected Ends Connected Together Together Blue collet Grey collet Chamber temperature 75 0 C Chamber temperature 55 2 C Airway temperature 42 8 C Airway temperature 40 5 C The measured values must be accurate to 0 3 of their nominal value when using a meter accurate to 0 2 Contact a Fisher amp Paykel Healthcare representative if an independent calibration probe check is required MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 55 12 Serial Port amp Logging Software 12 1 INTRODUCTION The View850 software is intended for use with the Fisher amp Paykel Healthcare MR850 Respiratory Humidifier The software can be used to display humidifier data and log the results to a file A serial cable part number 900MR888 is required in order to link the MR850 humidifier to a PC WARNING The serial port must not be used when the humidifier is in patient use Equipment connected to the serial port must comply with the safety standard IEC60950 for Personal Computers No liability for consequential damage In no event shall Fisher 8 Paykel Healthcare or its suppliers be liable for any damages arising out of the use of this View850 product View850 software is supplied on the MR850 Technical CD and can be ordered along with the 900MR888 serial cable from Fisher and Paykel Healthcare 12 2 INSTALLATION Installing View850
69. ow Probe CONNEeC OF ooncccoconnccccccccccnccccnnonononononononononononnononnnnononononononaninenanons 18 4 4 3 Chamber Probe amp Airway Probe ccccccccssecccnsesscecscnseccnscsesensausuecsuausenscuesensauasensauanssnansssenens 18 4 4 4 Chamber or Airway Probe Alarm with Probe connector alar oooooocccccconccccccononconononnonononnos 18 AA Water QUEDO AO AAA A E E EE 19 OPERATIONAL ALARMAS do es nd 19 4 5 1 Temperature Indicator A aie a a ace ae eats 19 4 5 2 Non Heater Wire Operati0D occococccocononocononocononooonooocononononononononanononnnnononononanononanonnananenanens 20 49 3 SCC MANTA e a ed 20 MAINTENANCE PROCEDURES suits da 21 MAINTENANCE SCHEDULE A A A O ee 21 VIT MARIO AA A eon ea a ee 21 91 2 IMMIRODO Temperature POG a ti 21 SO A O A ee eee 22 GEEANING INSTRUC IONS cra ti Ri A A A 23 Dl MERO SO UNOS cs ti A A AAA 23 S352 TOMDCTAUTC FIOW POD A scada sesiucds 23 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 3 6 1 6 2 6 3 6 4 7 1 1 2 8 2 9 1 9 2 10 11 12 12 1 12 2 12 3 13 14 TROUBLESHOOTING 00 A a a A we sees 24 OPERATIONAL PROBLEMS ti ina 24 TECHNICAE PROBLEMS id it E 26 SEE MANUAL ERROR CODES 1 ias 27 DIAGNOSTIC MEN e be ll Do 29 6 4 1 Diagnostic Menu for Software Versions 5 45 9 7 O occocooncccccnincconococnnococononononononononannonaninnnons 29 6 4 2 Diagnostic Menu for Software Version 6 00 ooonccconnnoc
70. rds and Approvals AS NZS 3200 1 0 CAN CSA 22 2 No 601 1 UL 60601 1 IEC 60601 1 EN 60601 1 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 11 4 Operating Modes and Controls 4 1 Humidifier Operation The MR850 humidifier is designed to add heat and moisture to respiratory gases The gas is passed through a humidification chamber where it is warmed and humidified The MR850 has two heating systems The first is a heater plate which heats the water contained in the humidification chamber humidifying the air passing through it The humidifier monitors the temperature of the gas at the chamber outlet with the chamber probe and controls the amount of power delivered to the heater plate in order to maintain the chamber set point Under normal conditions the gas is heated to 37 C in the invasive mode 31 C for the non invasive mode 4 1 1 Heater wire operation Ventilator Gas Supply RT100 Breathing Circuit Temperature Probe LA ao HOT S Bs ee Hi MR850 Humidifier Figure 4 1 Typical Heater Wire Humidifier Setup Humidified gas from the chamber travels through the inspiratory limb where its temperature must be maintained in order to prevent the generated humidity from condensing This is achieved with a heater wire encapsulated within the inspiratory limb The humidifier maintains the temperature along the inspiratory limb by monitoring the temperature at the a
71. rs i e ventilators that use room air It is recommended to switch off the auto HC function in these situations if the condensate becomes excessive NOTE Auto HC function is factory set to enabled on all MR850 models Manual Humidity Compensation For manual HC the level of compensation should be increased until beading condensate is observed on the inner walls of the humidification chamber It should be noted that if environmental conditions change then it might be necessary to re adjust this setting For example a fall in room temperature could produce a build up of unwanted condensate in the delivery circuit A reduction in this setting may stop further build up NOTE The previous manual HC setting is restored when power is applied to the humidifier Refer to section 6 4 Diagnostic Menu for further information regarding this feature Activating Deactivating Humidity Compensation Refer also to the diagnostic menu in section 6 4 1 Access the diagnostic menu by pressing the mute and mode buttons together for 1 second the diagnostic menu is entered indicated by the display of two rows of dashes Releasing both buttons will allow the diagnostic menu to cycle automatically through the menu 2 The first item is HC this is the humidity compensation item press and hold mute to access this function 3 The setting may show either 0 or A to change the setting press both mute and mode buttons simultaneously for 1 se
72. rt Number 1 614 040 861 641 040 829 336 060 149 641 040 707 331040 114 614 040 327 614 040 117 622 040 130 095 428 320 655 040 111 349 040 052 043 041 254 O 0 N O oa A O N lt 2 cs s O N gt OO 614 040 327 dh D 043 041 251 043 042 577 043 041 252 043 041 253 15 614 040 117 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal Description Screw M4x12 Reflector Reflector Spacer Washers Element Cover Mica Insulator Thermistor Screw Earth Strap Screw Earth Strap Washer Earth Strap Aluminium Heater Plate Thermal Cutout Thermistor Assembly Kit Thermal Cutout Screw Element Kit 230 V Element Kit 127 V Element Kit 115 V Element Kit 100 V Screw M4x8 53 54 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal 11 Calibration Probe The information presented here refers to the construction of the MR850 Calibration Probe This information is provided so that the probe can be checked for correct operation if required The calibration probe consists of two Redel plugs each containing four 0 1 tolerance resistors In order to measure the absolute accuracy of these resistors it is recommended that an ohm meter with better than 0 2 accuracy is used To measure the value of the resistors used in the probes unscrew the cable collet holding the plug together in order to gain access to the connect
73. s e Heater plate temperature is limited to 50 C e Heater plate power is limited to 20 NOTE The temperature alarm algorithm continues to function in stand by 4 1 4 Power Up Sequence The purpose of the power up sequence is to perform internal checks on various parts of the humidifier and provide the user with a visual and audible check Internal self test sequence 1 Test presence of heater wire 2 Test correct operation of heater wire triac 3 Test correct operation of protection relays 4 Test integrity of temperature flow probe Visual Audio test sequence The temperature display and indicator LEDs turn on The temperature display is blanked and indicators set to their default Display shows humidifier model number i e 850 Display is blanked Display shows software version number Display is blanked and an audio tone of 2100 Hz sounds Normal display E oe S 4 1 5 Humidity Compensation HC mode Software version 6 00 onward except 7 23 Normal ambient environments between 18 C and 26 C do not affect humidity output of temperature controlled heated humidifiers However once the ambient temperature increases above 26 C and or the temperature of the incoming gas becomes greater than 32 C e g due to ventilator heating then the humidity output maybe reduced This can be identified by the lack of beading condensate on the inner walls of the humidification chamber and rectified by modifying the breat
74. s polarity is correct see table in section 7 2 7 2 Slide the power PCB back into position ensuring that the side panel slides in the slots and latches into the case rear 3 Place the control PCB back into position in the front of the case ensuring all clips are located properly 4 Slide the case together and replace the four screws 5 In order to check that the humidifier is working properly complete a full performance test as outlined in section 8 MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 43 8 Performance Testing This section discusses the performance testing of the MR850 humidifier and also the MR850 temperature flow probe Performance testing is required as part of ongoing maintenance or after servicing of the humidifier has been completed 8 1 Humidifier Performance Testing If the humidifier has been operating normally but a performance check is required as part of the maintenance schedule it is recommended that the following tests are completed 1 A humidifier Calibration Check Section 8 1 2 2 A humidifier Display Check Section 8 1 3 However if there is a problem with the humidifier or if the humidifier has recently been serviced then the following tests should be completed in addition to those outlined above 3 A humidifier Voltage Calibration Check only required if the MR850 s PCBs or mains transformer have been serviced or replaced Section
75. see if the temperature probe is faulty by testing for the following conditions e Chamber temperature has been greater than 50 C for 20 minutes e Chamber temperature is greater than 80 C e Airway temperature has been greater than 50 C for 5 minutes e Airway temperature is greater than 80 C If an apparent fault is found the humidifier will give a temperature flow probe connector alarm and also indicate either the chamber or airway probe The humidifier will stay in stand by until the chamber or airway temperature drops below 50 C Once this occurs a probe test will also be initiated 18 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal 4 4 5 Water Out Indicator This indicates that there is insufficient water in the humidification chamber The humidifier measures the amount of power used to obtain the chamber temperature If a lower than expected amount of power is used a water out alarm is generated It may take 15 minutes or longer to generate an alarm especially if there is a disturbance change in flow This alarm can be cancelled by pressing the mute button If however the water out condition remains the humidifier will alarm again 4 5 Operational Alarms These alarms are generated if problems occur with the operation of the humidifier 4 5 1 Temperature Indicator N This alarm will occur if the displayed temperature is too high or if the delivered temp
76. shorted probe test e Flow calibration resistor open or short circuit shorted probe test An alarm will be generated if any of the above faults are found and the humidifier will remove power from all heating systems NOTE the shorted probe tests and flow thermistor tests are only performed on Start up or when temperature probe or heater wire alarms are cancelled 4 4 3 Chamber Probe amp Airway Probe These indicators are used to show that either the chamber probe or airway probe is not inserted into the breathing circuit correctly On start up and during rapid changes in temperature the humidifier tests to see if a probe is in place by cooling and then heating the probe If the humidifier finds that either probe is not inserted into the breathing circuit an alarm will be generated and the humidifier will enter stand by During this alarm the humidifier will initiate a probe out test periodically or a test will be initiated immediately after mute has been pressed During periods of low or zero gas flow the airway probe out alarm is disabled As soon as flow is detected however an airway probe test is initiated NOTE For software versions 7 22 and 7 23 in non heater wire operation the airway probe out alarm does not function instead the low temperature of the disconnected probe will activate the temperature alarm refer section 4 5 4 4 4 Chamber or Airway Probe Alarm with Probe connector alarm The humidifier checks to
77. software from the MR850 Technical CD 1 Insert CD into Personal Computer 2 Select Install View850 from menu list 3 Follow the install instructions 4 The software is now ready to run 123 OPERATING INSTRUCTIONS 12 3 1 Viewing Humidifier Data Connect a 900MR888 serial cable from the serial socket located on the bottom of the MR850 to a communications port RS 232 on the host computer Run the View850 exe program from the Microsoft Windows Start Menu Programs View850 Set the correct com port in the View850 software by going to the Config Menu and clicking on Settings The com port can be changed within the Settings dialog box Finally start the program running by clicking on the RUN button To stop click the Running button 56 MR850 Technical Manual RevisionJ Issued November 2005 Ref 185041340 185041713 internal 12 3 2 Logging Humidifier Data to File The View850 software can log the data it receives to a text file This text file can then be opened at a later date by programs such as Microsoft Excel in order to review humidifier performance In order to log the humidifier data first start the program running Next set the directory you want the log files to be placed in by using the menu buttons Select a directory and then click on the OK button To start the program logging click on the Log Data to file button A log file will be created The name of the file will be the current
78. time and date followed by an 850 extension To stop click the Logging Data to File button The log rate how often the data is saved to file can be changed through the menu buttons Note For further information on this program view the Readme txt file MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal 57 13 EMC INFORMATION WARNING The use of accessories other than those specified by Fisher amp Paykel Healthcare may result in increased emissions or decreased immunity of the equipment or system Guidance and manufacturer s declaration electromagnetic emissions The MR850 is intended for use in the electromagnetic environment specified below The customer or the user of the MR850 should assure that it is used in such an environment Emissions test Compliance Electromagnetic environment guidance RF emissions CISPR 11 RF emissions CISPR 11 Harmonic emissions IEC 61000 3 2 Voltage fluctuations flicker emissions IEC 61000 3 3 The MR850 uses RF energy only for its internal function Therefore its RF emissions are very low and are not likely to cause any interference in nearby electronic equipment The MR850 is suitable for use in all establishments including domestic establishments and those directly connected to the public low voltage power supply network that supplies buildings used for domestic purposes Guidance and manufacturer s decl
79. tion 1 0 1 0 C of chamber compensation 0 0 0 0 C of chamber compensation NO compensation A Automatic humidity compensation mode Invasive mode 0 to 3 C in 0 5 C steps E a Non invasive mode 0 to 3 C in 0 5 C steps O Op Y Chamber set point in 0 1 C resolution eg 37 0 Invasive mode range 35 5 to 40 C Non Invasive mode range 31 0 to 36 0 C HP Heater Plate Temperature 1 C Flo Gas Flow Rate 0 1 LPM Unknown Flow flow measurement not started FLr Gas Flow Rate Range Unknown Flow flow measurement not started no No flow Lo Low flow lt 3 LPM In Intermediate flow 2 to 17 LPM Hi High flow gt 13 LPM 13 Ventilated flow detected ASP Airway temperature set point 0 1 C Adc Airway Duty Cycle LAS Last Alarm State the display will blank and the humidifier s last alarm will be shown on the indicators To clear LAS press and hold the mute and mode buttons for 1 second The humidifier will beep when LAS has been cleared Last Fault State refer to section 6 3 To clear LFS press and hold the mute and mode buttons for 1 second The humidifier will beep when LFS has been cleared Press the mute button to cycle to the start of the menu or the diagnostic menu will automatically exit after 6 seconds LFS SoF End 30 MR850 Technical Manual Revision J Issued November
80. tions WARNING Although the MR850 display may not be illuminated the unit may still be energized Be sure to disconnect the MR850 from the power supply before servicing All servicing procedures should be followed by a humidifier performance test and an electrical safety test to ensure proper operation The performance tests are outlined in section 6 CAUTION Where screws and bolts have been removed from the product do not use excessive force when re fastening Antistatic procedures should be followed when servicing this product 7 2 Disassembly 7 2 1 Opening the case 1 Ensure mains power is disconnected from the unit 2 Remove the four screws at the back of the humidifier Separate the case by sliding the two halves apart Pull the front half of the case away from the rear Figure 7 1 The control PCB is attached to the front half of the case and is connected via ribbon cable to the power PCB fitted to the rear half of the case Figure 7 1 Case separation 3 Slide the power PCB forward with the side panel the side panel is attached to the power PCB The side panel will need to be pushed inwards during this action in order to unlatch and clear the electrical connectors 4 Un clip the three fasteners Figure 7 2 which hold the front control PCB to the front of the case and separate the front PCB from the case MR850 Technical Manual Revision J Issued November 2005 Ref 185041340 185041713 internal
81. umidifier in any liquid 3 Wipe the humidifier clear of any cleaning residues before use 5 3 2 Temperature Flow Probe The cleaning methods listed below meet the FDA regulations for these types of devices and do not affect the integrity or performance of the probe It is the user s responsibility to qualify any deviations from these procedures both for disinfecting efficacy and physical effect on the probe For advice on other cleaning methods not mentioned here contact your local Fisher and Paykel Healthcare distributor NOTE Refer also to the disinfection instructions on the instruction sheet for the airway temperature probe Ref 185042434 1 Physically clean the probes removing all visible contaminants 2 Disinfect the probes with one of the following solutions Sporicidin Sporox Cidex Cidex OPA OR Sterilise the probe using Ethylene Oxide sterilisation at 55 C 131 F 80 kPa allow at least 15 hours for residual ETO to disperse before use NOTE Follow the manufacturer s instructions carefully Use the correct dilution of the disinfectant CAUTION DO NOT immerse the black electrical connector plug in disinfectant DO NOT autoclave probes DO NOT use dishwater detergents or solvents 3 Wipe the airway temperature probes clear of any cleaning residues before use 4 Store in clean conditions Cidex is a registered trademark of Johnson amp Johnson Medical Pty Ltd North Ryde NSW Australia Sporicidi
82. vember 2005 Ref 185041340 185041713 internal Symptom Corrective Action Non heater wire mode has been activated connect a heated Heater wire alarm not working Airway Probe alarm flashes along with an audible alarm Temperature Flow Probe alarm with alrway or chamber indicators flashing Temperature probe connector indicator flashes accompanied by an audible alarm Temperature Indicator flashes with audible alarm coupled with a low temperature lt 35 5 C displayed wire circuit or disable this mode via the diagnostic menu Check that the airway probe is inserted into the breathing circuit correctly the breathing circuit assembled correctly and that there is water in the chamber Check that the circuit is connected correctly to the ventilator gas flow could be reversed through the humidifier Check that the gas flow rate is within specification of the Section 3 4 humidifier and type of accessories being used Adjust as necessary Check for excessive condensate build up Excessively cold or drafty ambient conditions may cause this alarm to occur Ensure there are no strong drafts around the breathing circuit Complete a probe accuracy check Replace probe as Section 8 2 necessary Humidifier faulty Replace PCBs If the Temperature Flow Probe alarm occurs with Section 4 4 chamber or airway indicators also flashing the temperature probe is faulty Complete a probe accuracy c

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