Fisher & Paykel MR730, MR720, MR480, MR700 technical manual Appendix a, Off

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APPENDIX A ___________________________________________________

A1 CALIBRATION MODE

Entry to the calibration mode is made by holding down the ‘Chamber Temp’ button and turning on the Mains Power switch.

After a two second delay the display should show ‘-1-’.

On releasing the ‘Chamber Temp’ button the display will show the humidifier model number (730/720/700 or 480).

The ‘Chamber Temp’ button is now used to step between functions as shown below.

1Model number display.

2Software version display.

3Traceability number.

441.0 °C comparator calibrate. VR4.

5ADC zero calibrate. VR5.

On pushing the ‘Chamber Temp’ button the display will show the present function number then after a one second delay step to the next higher function number, where if the ‘Chamber Temp’ button is then released then that function is entered

The calibration mode will time out (to normal operating mode) 5 minutes after the last ‘Chamber Temp’ button push. The normal exit mode is to turn the humidifier mains power switch off then on again.

For details on 41.0 °C and ADC zero calibration procedures refer § 5.3.

A2 ENGINEERING MENU

To enter the engineering menu push the Mute and ‘Chamber Temp’ buttons simultaneously and hold for at least 1.5 seconds. At this time the display will show SET (for set temperature display) as a pointer to that function and on release of the ‘Chamber Temp’ button the display will show the set Temperature Control temperature setting to one decimal place. To maintain this display, the Mute button should be kept depressed. If the Mute is released, the display will revert to normal operation in about 6 seconds.

The display can be stepped through the engineering menu in two ways.

If the Mute is held down constantly the functions can be selected sequentially by pressing the ‘Chamber Temp’ until the display changes to the next function pointer, where if the ‘Chamber Temp’ button is then released the display will show that function.

Releasing the mute button the humidifier will automatically step through the menu until either the mute button is pressed whereupon the display will show that function or if 6 seconds has elapsed and the humidifier will display ‘End’.

If ‘End’ appears on the display and the Mute button is momentarily pushed the time out will be inhibited and the stepping through the function pointers continued.

A2.1 ENGINEERING DISPLAY FUNCTIONS: HEATER WIRE MODE

SET

Set temperature display (°C).

OFF

Offset temperature display (Chamber Control) (°C).

Edc

Heater wire duty cycle (%).

Cdc

Heaterplate duty cycle (%).

hP

Heaterplate temperature (°C).

L

Programming link status.(L1, L2, ... L6).

CP

Compare probes (Probe test).

Ei

Heater wire integral.

Ti

Heaterplate integral.

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