Instruction/ maintenance manual of the product MR850 Fisher & Paykel
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MR850 RESPIRATORY HUMIDIFIER Technical Manual REVISION J Copyright ©2005 Fisher & Paykel Healthcare Ltd. Auckland, New Zealand.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 2 Fisher & Paykel Healthcare Head Office: PO Box 14-348, Panmure, Auckland 1134 New Zealand Email: info@fphcare.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 3 TABLE OF CONTENTS 1 INTRODUCTION ................................................................................................................... ..
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 4 6 TROUBLESH OOTING ................................................................................................................ ..... 24 6.1 O PERATIONAL P ROBLEMS .
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 5 Revision Description of Technical Manual Cha nge Date Issued A First release technical manual. Covers Revision A PCB’s ONLY . 12 Jan. 1999 B Second release technical manual.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 6 Revision Description of Technical Manual Change Date Issued J 1.4 Product Application, Add warni ng to connect humi difier only to a pure sine wave po wer source 5.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 7 Introduction 1.1 About this Manual This manual is intended for qualified servic e personnel who will perform maintenance and servicing on the Fisher & Paykel Healthcare MR850 Respiratory Humidifier.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 8 Expiratory Limb The section of the breathing circuit that takes th e expired gases from the patient.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 9 2 Humidifier Symbols Caution: Hot surfaces may exceed 85 °C Power On/Off (stand by) Type BF Invasiv.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 10 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 11 Non-heater wire operation: Invasive Mode: Airway temperature < 29.5 °C causes an audible and visible alarm. Non-invasive Mode: Airway temperature < 26.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 12 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 13 4.1.2 Non-Heater Wire Operation (Software version 7.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 14 Stand-by (Software versions: 5.45 & 5.70) • Heater wire power is set at 30 %. • Control of chamber temperature is attempted, within the following limits: • Heater plate temperature is limited to 60 °C.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 15 then the chamber set point will automatically be increased in 0.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 16 connected. Breathing circuit recognition is performed via three electrical connections on the heater wire adaptor.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 17 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 18 4.4.2 Temperature / Flow Probe Connector This indicator will light if the temperature probe is not corre ctly plugged in, or the probe used is faulty.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 19 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 20 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 21 5 Maintenance Procedures In order to keep your humidifier in good worki ng order, it is necessary to perform maintenance at regular intervals. 5.1 Maintenance Schedule 5.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 22 5.2 Safety Check The unit should be tested to the current medical electrica l standards for in-house testing for each specific country (example, refer to AS/NZS 3551 for Australia and New Zealand).
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 23 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 24 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 25 Symptom Corrective Action Reference Heater wire alarm not working Non-heater wire mode has been a ctivated, connect a heated wire circuit or disable this mode via the diagnosti c menu.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 26 Symptom Corrective Action Reference 1. Make sure the humidifier h as had time to warm up and that there is sufficient gas flow through the b reathing circuit.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 27 6.3 “See Manual” Error Codes The following is an explanation of the error codes that are displayed in conjunction w ith the See Manual indicator flashing.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 28 Error Description of Fault E41 Failed the functional test at time of manufacture E42 Was not stress.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 29 6.4 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 ‘= = =’.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 30 6.4.2 Diagnostic Menu for Software Version 6.00 Display Description HC Humidity Compensation (HC) algorith m Invasive mode, compensation range is 0.0 to 3.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 31 6.4.3 Diagnostic Menu for Software Version 7.00 & 7.21 Display Description HC Humidity Compensation (HC) algorith m Invasive mode, compensation range is 0.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 32 6.4.4 Diagnostic Menu for Software Version 7.14 Display Description HC Humidity Compensation (HC) algorithm Note: HC is inactive while operating under non-he ater wire control.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 33 6.4.5 Diagnostic Menu for Software Version 7.22 Display Description HC Humidity Compensation (HC) algorithm Note: HC is inactive while operating under non-he ater wire control.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 34 6.4.6 Diagnostic Menu for Software Version 7.23 Display Description Cct Connected breathing circuit.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 35 7 Servicing Procedures 7.1 General Considerations 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 36 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 37 MR850 Model Number Supply Voltage Fuse Type Part Number MR850Jxx 115 V~ F1: 1 A 250 V FastBlow F2: .
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 38 Figure 7.4 Showing Humidifier Power PCB w iring 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 39 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 suf ficiently before the thermal cutout will reset.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 40 Figure 7.7 Showing location of Heater Plate Thermistor Thermal Cutout and Element Scre ws 8. Solder the wires from the new harness to the heater plate thermal cutout.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 41 5. Remove the heater element, leaving the mica insulator in place. 6. Insert the new element into position, making sure the insulating mica is between the element and the heater plate.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 42 7.2.6 Installing New Software NOTE : A software upgrade kit is required.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 43 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 44 8 Performance Testing This section discusses the performance testing of the MR850 humidifier and also the MR850 temperature / flow probe.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 45 1. Hold down the power button, then apply mains power to the humidifier. This action places the humidifier into service mode. 2. Select service mode number 1 (Calibration Probe #1 Check) by pushing the mute button when '-1-' is displayed.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 46 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 47 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 48 1. Perform a humidifier calibration check as outlined in section 8.1.2 (ignore this step if recently completed). 2. Set up the humidifier as shown in Figure 4.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 49 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 50 (Blank).
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 51 10 Spare Parts Should any parts of the humidifier requ ire replacement, the following parts list is provided. Refer to the exp loded diagram on the opposite pa ge for part identification.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 52.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 53 Heater Plate Assembly Item Part Number Description 1 614 040 861 Screw (M4x12) 2 641 040 829 Reflec.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 54.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 55 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 oper ation if required.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 56 12 Serial Port & Logging Software 12.1 INTRODUCTION The View850 software* is intended for use with the Fisher & Paykel Healthcare MR850 Respiratory Humidifier.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 57 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 58 13 EMC INFORMATION WARNING: The use of accessories other than those specified by Fisher & Paykel Healthcare may result in increased emissions or decreased immunity of the equipment or system.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 59 Guidance and manufacturer’s declar ation – electromagnetic immunity The MR850 is intended for use in the electromagnetic environment s pecified below.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 60 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.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 61 History Change for model GJU PCB Version Software Version Introduction Serial Number Comments A 4.40 19 September 1998 9885xxx00000 First production release.
MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041 340 (185041713 internal) 62 History Change for all model except JHU & GJU PCB Version Software Version Introduction Serial Number Comments A 4.40 19 September 1998 9885xxx00000 First production release.
An important point after buying a device Fisher & Paykel MR850 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Fisher & Paykel MR850 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Fisher & Paykel MR850 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Fisher & Paykel MR850 you will learn all the available features of the product, as well as information on its operation. The information that you get Fisher & Paykel MR850 will certainly help you make a decision on the purchase.
If you already are a holder of Fisher & Paykel MR850, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Fisher & Paykel MR850.
However, one of the most important roles played by the user manual is to help in solving problems with Fisher & Paykel MR850. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Fisher & Paykel MR850 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
