Fisher & Paykel MR730, MR720, MR480 Version 1.0 and Version 2.0 Software, Version 3.0 Software

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Pushing the mute button will silence the Audio alarm.

7

3.2.4CHAMBER TEMP HIGH ALARM

This alarm will activate if:

The temperature of gas leaving the humidification chamber outlet is more than 4 °C higher than the chamber set temperature for more than 20 minutes. (The chamber set temperature is the sum of the Temperature Control setting and the Chamber Control setting).

The temperature of the gas leaving the humidification chamber outlet exceeds the chamber set temperature by 10 °C or more.

This alarm causes the heater circuits to switch off and the ‘Chamber Temp High’ amber LED indicator to start flashing. The audio alarm (which can be muted) is also enabled. This alarm remains active until the high temperature condition is cleared.

3.2.5 CHAMBER TEMP LOW ALARM ACTIVATION

For Chamber Set Temperature < 35 °C

For Chamber Set Temperature 35 °C

The temperature of gas leaving the humidification

The temperature of gas leaving the humidification

chamber outlet is less than 4 °C lower than the

chamber outlet is less than 31 °C for more than 20

chamber set temperature for more than 20 minutes.

minutes.

The Chamber Temp Low alarm amber LED will begin to flash and the audio alarm is enabled. This alarm remains active until the low temperature condition is cleared.

3.2.6SET LOW WARNING

Version 1.0 and Version 2.0 Software

This alarm will activate if the chamber set temperature is below 31.0 °C. In this case the Set Low amber LED will immediately be enabled and remain on, until such time as the chamber set temperature is adjusted above 31.0 °C. There is no audible alarm.

Version 3.0 Software

This alarm will activate if either the chamber set temperature or Temperature Control setting is below 34.0 °C.

In these cases the Set Low amber LED will immediately be enabled and remain on, until such time as the set airway or chamber set temperature is adjusted above 34.0 °C. There is no audible alarm.

3.3TEMPERATURE ALARMS IN NON HEATER WIRE MODE (INCLUDES MR480)

3.3.1HEATER WIRE ALARM

This indicates that a heater wire has been connected when the non heater wire mode has been selected (Heater Wire ‘On’ LED is off). In this case the Heater Wire alarm LED will be flashing, the audio alarm begins and the heaterplate is switched off.

3.3.2AIRWAY TEMPERATURE HIGH ALARM

The red Airway Temp High LED will flash and an audible alarm will sound if the gas temperature being delivered to the patient is 41 °C or higher. Power to the heaterplate is immediately shut off.

3.3.3AIRWAY TEMPERATURE LOW ALARM

The red Airway Temp Low LED will flash and an audible alarm will sound if the gas temperature being delivered to the patient is 29.5 °C or less.

The audio alarm is not enabled for 30 seconds after the low temperature LED begins flashing.

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 EP4Second Byte First 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