Fisher & Paykel MR730, MR720, MR480, MR700 technical manual High Temperature

Page 57

 

 

51

 

C.1.2

HIGH TEMPERATURE

 

 

 

 

 

 

 

Condition detected

Possible cause

F Action to take

 

 

 

 

 

 

 

 

 

Airway temperature high alarm

Sudden spurious increase in gas flow.

Wait for temperature to fall below

 

activated.

 

threshold.

 

 

 

 

 

 

Heater wire too close to temperature

Use shorter heater wire or lengthen

 

 

probe.

inspiratory hose so that distance is

 

 

 

between 25 (1”) and 100 mm (4”), ideally

 

 

 

30 mm.

 

 

 

 

 

 

Possibly faulty EOH sensor on

Check probe, see § 6.4.

 

 

temperature probe (low resistance).

 

 

 

 

 

 

Chamber temperature high alarm

No water in chamber.

Refill humidification chamber.

 

activated.

 

 

 

 

 

 

 

 

Possibly faulty TOP sensor on

Check probe, see § 6.4.

 

 

temperature probe (low resistance).

 

 

 

 

 

C.1.3

TEMPERATURE FLUCTUATING

 

 

 

 

 

 

 

Condition detected

Possible cause

FAction to take

 

 

 

 

 

 

 

 

 

High and low temperature

Ventilation rate too low or too erratic

Ventilation rates below about 6 bpm or of

 

alarms.

for proper humidifier temperature

a highly erratic nature may affect the

 

 

control.

stability of the temperature control.

 

 

 

 

 

 

Humidifier temperature control

Shield breathing circuit from external

 

 

influenced by external heating or

influence.

 

 

cooling such as air conditioner.

 

 

 

 

 

 

 

Temperature probes incorrectly

Check temperature probe position in the

 

 

positioned.

circuit.

 

 

 

 

 

 

Possibly faulty temperature probe

Check probe, see Section 6.4.

 

 

(Could be intermittent short or open

(Wriggle probe to pick up intermittent

 

 

circuit).

 

 

faults).

 

 

 

 

 

 

 

C.1.4

EXCESSIVE WATER IN CIRCUIT

 

 

 

 

 

 

 

Condition detected

Possible cause

FAction to take

 

 

 

 

 

 

 

 

 

Excessive water in inspiratory

If in non-heated wire mode, water trap

Reposition water trap.

 

circuit due to rainout.

not at the lowest point of the circuit.

 

 

 

 

 

 

 

If in heated wire mode, heater wire too

Increase distance from heater wire to

 

 

close to temperature probe.

temperature probe so that the distance is

 

 

 

between 25 (1”) and 100mm (4”), ideally

 

 

 

30mm.

 

 

 

 

 

 

Inspiratory circuit being cooled by air

Shield circuit from air conditioner or use

 

 

conditioner.

heater wire circuits.

 

 

 

 

 

 

Chamber control set too high

Reduce setting.

 

 

 

 

 

 

Maximum permissible peak flow rate of

Use correct chamber. Refer to the

 

 

humidification chamber has been

operating instructions for the type of

 

 

exceeded.

chamber used.

 

 

 

 

 

 

Humidifier chamber tilted.

Ensure chamber is level.

 

 

 

 

 

 

Possibly faulty temperature probe (low

Check probe, see § 6.4

 

 

resistance).

 

 

 

 

 

 

 

Inspiratory heater wire not connected

Connect inspiratory heater wire.

 

 

in a parallel wired dual circuit.

 

 

 

 

 

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

Image 57
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