Fisher Paykel 850 Service Manual

Posted : admin On 9/6/2019

Fisher Paykel Service Manual
Fisher & Paykel Parts Manual
Fisher Paykel 850 Service Manual Pdf
Fisher Paykel 850 Service Manual Instructions

This manual is encoded in PDF file format

This manual is intended for qualified service personnel who will perform maintenance and servicing on the Fisher & Paykel Healthcare MR850 Respiratory Humidifier. This manual covers the product specifications, includes a maintenance schedule, and provides the necessary information required for servicing. Refer maintenance to qualified service personnel. A full technical description including routine maintenance and service data is contained in the Technical Manual which is available from your supplier or Fisher & Paykel Healthcare (REF 185041340).

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MR850 Technical Manual * Revision J * Issued November 2005 * Ref. 185041340 (185041713 internal)

Symptom

Corrective Action

Reference

1. Make sure the humidifier has had time to warm up and that

there is sufficient gas flow through the breathing circuit.

2. The humidifier cannot maintain temperature. If the

temperature indicator is also on then an alarm will occur
eventually.

Section 4.5

A low temperature
is shown on the
humidifier’s
display, with no
audible alarm

3. Humidifier or probe faulty. Complete humidifier and probe

performance test. Replace probe or service humidifier as
required.

Section 8

1. Flow has recently been changed, allow 30 minutes for

temperature to stabilise

High displayed
temperature, no
temperature alarm

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2. Manual or automatic humidity compensation is active

Section 4.1.5

Temperature
indicator flashes,
with audible alarm,
and a high
temperature is
shown.

The gas flow rate may have suddenly changed. Monitor
the displayed temperature, if the temperature does not fall
rapidly then remove humidifier from patient, and complete a
performance test on the humidifier, and temperature / flow
probe. Replace probe or service humidifier as required.

Section 8

6.2 Technical

Problems

Problems that cause the humidifier to malfunction without an audible alarm are discussed in this
section.

Symptom

Corrective Action

Reference

Fisher Paykel Service Manual

1. Check that the mains supply is within specification.

Provide adequate mains supply if required.

2. If ‘PtS’ is displayed.

Section 6.1

See manual
indicator lit (not
flashing)

3. Replace PCBs.

Section 7.2.3

1. Humidifier plugged into mains supply?

2. Check that the mains supply is within specification.

Provide adequate mains supply if required.

3. Remove mains power and check the fuses.

Section 7.2.2

4. Check continuity of mains power cord. Replace as

necessary.

Section 7.2.7

5. Check the transformer windings are not open circuit.

Primary Winding: Red wires
Secondary 10v winding: White wires
Secondary 22v winding: Yellow wires
If any windings are open circuit, replace the transformer.

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Section 7.2.4

Humidifier will not
turn on with on/off
button, and no
indicators are lit

6. Replace PCBs.

Section 7.2.3

Unit fails
calibration check

Send unit to a Fisher & Paykel Healthcare service
representative for calibration, or replace PCBs.

Fisher & Paykel Parts Manual

Section 7.2.3

Probe fails Probe
Accuracy Check

Replace probe.

1. If the chamber outlet temperature was low, the heater plate

element should be checked. Replace element as
necessary.

Section 7.2.5

2. If the airway temperature was low, replace breathing circuit