Fisher & Paykel MR730, MR720, MR480, MR700 technical manual Operating Controls and Modes

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2.0OPERATING CONTROLS AND MODES _____________________________

2.1ADJUSTABLE CONTROLS

2.1.1AIRWAY TEMPERATURE CONTROL

Selects the airway controlling temperature. The range of adjustment is from 31 to 40 °C over a linear scale marked in degrees on the front panel.

The temperature can be set with a resolution of 0.1 °C. The set temperature is flashed on the display when the control knob is rotated and continues to be flashed for five seconds after the last adjustment.

2.1.2CHAMBER CONTROL (HEATER WIRE ON MODE ONLY)

The temperature of the gas leaving the chamber is regulated by the Chamber Control knob, it sets the difference between the chamber outlet temperature and the airway temperature delivered to the patient. The setting of the Chamber Control, when added to the setting of the Temperature Control, determines the chamber outlet set temperature. This Chamber Control has a linear range of adjustment from -5 to +2 °C marked in one degree steps and can be set with a resolution of

0.5°C. The value is flashed on the Airway display as the control knob is rotated and continues to be flashed for five seconds after the last adjustment.

Every humidifier is also supplied with a fixed chamber control knob. This prevents inadvertent adjustment of the chamber control by preadjusting the existing knob to the desired setting and then replacing the normal knob with the fixed knob.

2.2PUSH SWITCHES

2.2.1MUTE BUTTON

A momentary push will disable an audible alarm for 3 minutes (except low temperature alarm in non heater wire mode which is 10 minutes).

A secondary function is that in conjunction with the Chamber Temp switch enables entry to the engineering menu (refer Appendix A2).

On every initial push of the mute button a momentary audio beep indicates function operation.

2.2.2CHAMBER TEMP BUTTON

MR700 Series Humidifiers with Version 1.0 Software:

Operation of this switch causes the airway temperature display to momentarily blank then show the chamber outlet temperature. A green LED adjacent to the switch is enabled to indicate that this function is active. On release of this switch the display reverts immediately to show the airway temperature.

This button is used in conjunction with the mute to enter the engineering menu (refer Appendix A2).

MR700 Series Humidifiers with Version 2.0 and Version 3.0 Software:

Operation of this switch causes the airway temperature display to momentarily blank then show the chamber outlet temperature. A green LED adjacent to the switch is enabled to indicate that this function is active. On release of this switch the display continues to show the chamber outlet temperature for 2 seconds before blanking momentarily and reverting to show the airway temperature.

This button is used in conjunction with the mute to enter the engineering menu (refer Appendix A2).

Ref. 185040646 MR730/720/700/480 Technical Manual ¯ Revision F ¯ Issued March 2001

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Contents Auckland, New Zealand D E L S MR730 MR720 MR700 MR480National Office Revision F changes Section Description of ChangeContents Performance Check MR480 Dual Probe Temperature TestMaintenance Schedule B1.1 Power PCB Harness Connection DiagramMaintenance Schedule Checklist 10.1Appendix D Models MR730/720/700 MR700 Series General SpecificationsSET EOHTOP RSDMR700 Series Humidifiers with Version 1.0 Software Operating Controls and ModesStandby Button MR700/720/730 only 1 MR700/MR730 ALL Software VERSIONS, MR720 Version 1.0 only 2 MR720 Version 2.0, 3.0 SoftwareAlarms and Indicators Version 3.0 Software Version 1.0 and Version 2.0 SoftwareAudio Alarm Circuit Operation Power Line Interrupt Revisions D/F Pcbs Revision H and J Pcbs For models with Revision D PCB and earlier CalibrationPage Performance Check Alarms Check MR700/720/730 Dual Probe Temperature Test Servicing Information Replacing revision F or earlier power PCB MR700/720/730Replacing revision F or earlier power PCB MR480 Fault Location SCHEMATICS, Part Lists and Mechanical Drawings Power Board Control Board Component Layout Revision F PCB Page This page Left Blank Circuit Diagrams Revision H and J PCB Control PCB Circuit Diagrams Revision H and J PCB Power PCB Circuit Diagrams Revision F PCB Control PCB Circuit Diagrams Revision F PCB Power PCB LED1, LED3 DSP1, DSP2, DSP3LED2,LED4, LED5,LED11 LED6,LED7 LED8,LED9,LED10SPK1 SW5VR1 VR4Fuse fast acting 2 a 20 × 5 mm for 230 999830009 MR480AGM Exploded Diagrams MR480 10.3 MR730/720/700 Mechanical Parts MR720ASU Exploded Diagrams MR730/720/700 Heaterplate Assembly Parts MR730/720/700/480 Page PCB Identification Diagram Power PCB Harness Connection Diagram Date Change First Serial Number Comments Affected Product Change HistoryYear Model Code Serial Number AAA XxxxxOFF Appendix aA2.3 Integral Display Error MessagesEP2 EP1EP3 EP4First Byte Second ByteThird Byte A5.4 Serial Data Interface Connector Appendix B B1 Maintenance ScheduleElectrical Safety Checks as required Photocopy and File in Maintenance RecordsPossible cause Action to take Appendix CHigh Temperature C1.6 C1.5LED on Check Voltage Rating Of Unit Appendix D Cleaning instructionsAppendix E Setup NotesDynamic Test Sequence MR730/720/700 Dynamic Test Procedure MR480
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