Fisher & Paykel MR480, MR720, MR730, MR700 technical manual C1.5, C1.6

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52

 

 

 

 

 

 

Excessive water in expiratory

Condensation due to cooling in

Use dual heated circuit.

 

circuit due to rainout.

Expiratory line.

 

 

 

 

 

 

Water ejected from

Humidification chamber filled beyond

Rduce water level

 

humidification chamber into

maximum water level line.

 

 

circuit.

 

 

 

 

 

 

 

 

Maximum permissible peak flow rate of

Ue correct chamber. Refer to the

 

 

humidification chamber has been

operating instructions for the type of

 

 

exceeded.

chamber used.

 

 

 

 

 

 

Humidifier chamber tilted.

Chamber should be level.

 

 

 

 

C1.5

LOW HUMIDITY

 

 

 

 

 

 

 

Condition detected

Possible cause

FAction to take

 

 

 

 

 

 

 

 

 

Low humidity.

Chamber control set to low.

Increase setting.

 

 

 

 

 

 

No water in humidification chamber.

Fill chamber.

 

 

 

 

 

 

Chamber temperature low.

Check heaterplate temperature setting on

 

 

 

diaplay when humidifier is switched on,

 

 

 

Chamber base and heaterplate are smooth

 

 

 

and flat and in good contact. (Chambers

 

 

 

not made by Fisher & Paykel may not be

 

 

 

suitable).

 

 

 

 

 

 

Gas flow rate too high for chamber.

Check maximum flow rate in to chamber

 

 

 

operating instructions.

 

 

 

 

C1.6

ALARMS

 

 

 

 

 

 

 

Condition detected

Possible cause

FAction to take

 

 

 

 

 

 

 

 

 

Temperature probe alarm (‘---’

Temperature probe unplugged.

Check connetion.

 

appears on display).

 

 

 

 

 

 

 

 

Temperature probe plug dirty.

Clean plug.

 

 

 

 

 

 

Temperature probe faulty

Replace probe.

 

 

 

 

 

Heater wire alarm while

Heater wire unplugged.

Check connection.

 

temperature still displayed.

 

 

 

 

 

 

 

 

Heater wire broken.

Replace heater wire.

 

 

 

 

 

 

Heater wire switch turned off but

Turn heater wire on.

 

 

heater wire connected.

 

 

 

 

 

 

 

Heater wire switch turned on but heater

Turn heater wire off.

 

 

wire not connected.

 

 

 

 

 

 

Heater wire alarm while ‘F2’

Internal fuse blown.

Send for repair.

 

displayed.

 

 

 

 

 

 

 

 

41 °C Overheat calibration outside

Check calibration of the 41 °C

 

 

limits.

comparator.

 

 

 

 

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

Image 58
Contents D E L S MR730 MR720 MR700 MR480 Auckland, New ZealandRevision F changes Section Description of Change National OfficeContents Dual Probe Temperature Test Performance Check MR480Maintenance Schedule Checklist Power PCB Harness Connection DiagramMaintenance Schedule B1.1 10.1Appendix D MR700 Series General Specifications Models MR730/720/700TOP EOHSET RSDOperating Controls and Modes MR700 Series Humidifiers with Version 1.0 SoftwareStandby Button MR700/720/730 only 2 MR720 Version 2.0, 3.0 Software 1 MR700/MR730 ALL Software VERSIONS, MR720 Version 1.0 onlyAlarms and Indicators Version 1.0 and Version 2.0 Software Version 3.0 SoftwareAudio Alarm Circuit Operation Power Line Interrupt Revisions D/F Pcbs Revision H and J Pcbs Calibration For models with Revision D PCB and earlierPage Performance Check Alarms Check MR700/720/730 Dual Probe Temperature Test Replacing revision F or earlier power PCB MR700/720/730 Servicing InformationReplacing 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 LED2,LED4, LED5,LED11 DSP1, DSP2, DSP3LED1, LED3 LED6,LED7 LED8,LED9,LED10VR1 SW5SPK1 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 Product Change History Date Change First Serial Number Comments AffectedAAA Xxxxx Year Model Code Serial NumberAppendix a OFFError Messages A2.3 Integral DisplayEP3 EP1EP2 EP4Second Byte First ByteThird Byte A5.4 Serial Data Interface Connector B1 Maintenance Schedule Appendix BPhotocopy and File in Maintenance Records Electrical Safety Checks as requiredAppendix C Possible cause Action to takeHigh Temperature C1.5 C1.6LED on Check Voltage Rating Of Unit Cleaning instructions Appendix DSetup Notes Appendix EDynamic Test Sequence MR730/720/700 Dynamic Test Procedure MR480