Fisher & Paykel MR730, MR720, MR480 technical manual Alarms Check MR700/720/730

Page 21

15

6.2.4ALARMS CHECK MR700/720/730

1Rotate Temperature Control knob to 37 and check for an Airway Temperature Low alarm. (For an MR720 set to 40 °C and check for an Airway Temperature Low alarm).

2Rotate Temperature Control knob to 32 and check for an Airway Temperature High alarm.

3If ‘set low’ light is not already on, rotate the chamber control to -1.5 and check that the ‘set low’ light comes on (all software versions).

4Rotate the Temperature Control knob back to 36 and check that alarms cease and set low LED is off..

5Disconnect the Heater Wire plug and check for audio alarm and Heater Wire alarm light.

6Reconnect the heater wire. For MR720/730 models, turn the Heater Wire off and check for audio alarm and Heater Wire alarm light.

7Disconnect the 34.5°C temperature probe and check that the Temperature Probe LED flashes and gives an audio alarm.

8Insert the 41°C temperature probe into the humidifier and check that the Airway Temperature High LED flashes and the audio alarm sounds.

9Push the Mute button and check that the audio alarm is silenced

10Go to the engineering menu and check that the heaterplate duty cycle (Cdc) and heater wire duty cycle (Edc) are starting to decrease, this may take a few seconds.

11Turn off the humidifier.

12Humidifier is now ready for service.

6.3PERFORMANCE CHECK (MR480)

6.3.1EQUIPMENT REQUIRED

34.5 °C and 41 °C test probes, available in MR700 series calibration kit (Fisher & Paykel part no. 900MR548).

A Full Humidification Chamber

6.3.2SETUP

1Slide the humidification chamber on to the heaterbase.

6.3.3TEMPERATURE CONTROL CHECK (MR480)

1Plug in the 34.5 °C test probe.

2Turn the Temperature Control knob to 32.0 °C.

3Turn on the humidifier main power switch.

4Check that 32.0 ± 0.2 °C flashes on the display during initialisation.

5Check for a display reading of 34.5 ± 0.2 °C after initialisation.

6Push the Chamber Temp. button and check for a reading of 34.5 ± 0.2 °C.

7Run for 5 minutes without interuption. If mains power is interupted test will have to be restarted.

8After 5 minutes check the following in ‘Engineering mode’ (see Appendix A2):

Set

32

hp

≤ 60

9Turn off the humidifier.

10Turn the Temperature Control knob to 36.0 ± 0.2 °C (check correct setting is displayed when the control is adjusted).

11Run for 25 minutes.

12After 25 minutes check the engineering menu (appendix A2.2):

Set

36

hp

≥ 70

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

Image 21
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