Fisher & Paykel MR700, MR730, MR480 technical manual 2 MR720 Version 2.0, 3.0 Software

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2.6 WARM UP MODE

After initial turn on, warm up mode is entered. In this mode the Low temperature alarm is disabled. The Low temperature alarm is enabled when warm up mode is exited.

2.6.1WARM UP MODE EXITING CONDITIONS (LOW TEMPERATURE ALARM ENABLED):

(MR700/MR730(All versions) and MR720(version 1.0) in Heater Wire Mode) Warm Up mode continues until the Software Detects-

Either:

The airway temperature reaches within 0.8 °C of the Temperature Control set point.

Or:

The airway temperature has not increased by 2 °C for at least 4 minutes (2 minutes for version 3.0 software).

Or:

The airway temperature has not got within 2 °C of the set point after ten minutes from switch on.

(MR700/MR730(all versions) and MR720(version 1.0) in Non Heater Wire Mode and MR480) Warm Up mode continues until the Software Detects-

Either:

The airway temperature gets above 30 °C.

Or:

The airway temperature has not increased by 2 °C within 15 minutes.

Or:

The airway temperature has increased by 2 °C within 15 minutes but still has not reached 30 °C after a further 15

 

minutes.

 

Note:In this mode the audio alarm is not enabled until 30 seconds after the Airway Temp Low LED switches on.

 

At this time the heaterplate circuit switches off, pressing mute will silence the alarm for 10 minutes, during

 

which time the heaterplate power is enabled

2.6.2MR720 (VERSION 2.0, 3.0 SOFTWARE)

If the above warm up exiting conditions are not initially met the MR720 will automatically enter the standby mode for 20 minutes for version 2.0 software and 30 minutes for version 3.0 software (refer § 2.7.2).

2.7STANDBY MODE

2.7.1MR700/MR730 (ALL SOFTWARE VERSIONS), MR720 (VERSION 1.0 ONLY)

The standby mode can be entered or exited by depressing the standby button for 1 second. A beep will be emitted once successful entered or exited standby mode (refer § 2.2.3).

In the standby mode all Low Temperature alarms are inhibited, the heaterplate is controlled to a nominal 40.0 °C and the heater wire is on a 15 % duty cycle.

Standby mode is automatically exited after 20 minutes (30 minutes for version 3.0 software) and the warm up mode is entered (the low temperature alarms remain disabled - refer § 2.6).

A Remote Standby request (see Appendix A5.3) enables the standby mode and turns the standby amber LED permanently on.

2.7.2MR720 STANDBY MODE (VERSION 2.0 AND 3.0 SOFTWARE ONLY)

The MR720 has a special feature where it will go into a standby mode automatically after turn on if the warm up exiting conditions are not met. This standby mode time is 20 minutes for version 2.0 and 30 minutes for version 3.0 software.

While in standby mode, if the airway temperature increases by 2 °C at any time, the MR720 will exit stand by mode and enter warm up mode. The unit then monitors the warm-up exiting conditions(see § 2.6.1 and 2.6.2), and if these are not met, then the unit re-enters Standby mode.

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 Test10.1 Power PCB Harness Connection DiagramMaintenance Schedule B1.1 Maintenance Schedule ChecklistAppendix D Models MR730/720/700 MR700 Series General SpecificationsRSD EOHSET TOPMR700 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 LED6,LED7 LED8,LED9,LED10 DSP1, DSP2, DSP3LED1, LED3 LED2,LED4, LED5,LED11VR4 SW5SPK1 VR1Fuse 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 MessagesEP4 EP1EP2 EP3Third Byte First ByteSecond 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