Puritan Bennett GoodKnight 420G Service Manual

GoodKnight® 425 SERVICE MANUAL GoodKnight® 425ST P/N: M-145MAT00-20 Revision

GoodKnight 425 / 425ST Service Manual P/N: M-145MAT00-20 Rev. A - Page Rev.

GoodKnight 425 / 425ST Service Manual P/N: M-145MAT00-20 Rev. A - Page Rev.

GoodKnight 425 / 425ST Service Manual P/N: M-145MAT00-20 Rev. A - Page Rev.

GoodKnight 425 / 425ST Service Manual C. SYMBOLS P/N: M-145MAT00-

GoodKnight 425 / 425ST Service Manual D. CLEANING INSTRUCTIONS 1) GoodKni

II - THEORY OF OPERATION P/N: M-145MAT00-20 Rev. A - Page Rev.A II-1 GoodKnight 425 / 425ST

A. General description 1) General design synopsis P/N: M-145MAT00-20 Rev. A - Page Rev.A II-2 2) View of the control panel Ramp activation or Para

3) Description The general architecture of the device is based on the use of a blower (pressurised air genera-tor) and two micro-controllers (one for

7) Pneumatic diagram P/N: M-145MAT00-20 Rev. A - Page Rev.A II-4 5) Temperature Sensor The stator of the blower is fitted with a temperat

B. ELECTRICAL DIAGRAM 1) General block diagram P/N: M-145MAT00-20 Rev. A - Page Rev.A II-5 GoodKnight 425 / 425ST

2) Micro-controller unit block diagram a) Micro-Master P/N: M-145MAT00-20 Rev. A - Page Rev.A II-6

3) Pressure measurement chain 4) Flow measurement chain P/N: M-145MAT00-20 Rev. A - Page Rev.A II-7 PressureSensorFilter RCLowpas

P/N: M-145MAT00-20 Rev. A - Page Rev.A II-8 5) Temperature measurement 6) Serial Link PCTxRxµCMASTERP30/RxDP31/TxDInterfaceRS

III - SERVICE AND REPAIR GoodKnight 425 / 425 ST Service Manual P/N: M-145MAT

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-2 This section describes how to service the individual subassembly of the GoodKnight 425 and 425ST Cpap Sy

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-3 GoodKnight 425 / 425 ST Service

4) Preparation for testing a - Verification of the pressure b - Verification of the flow measurement chain P/N:

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-5 5) Performance verification with a computer. 5-a) Preparation - Set the material as shown on f

- The following screen appears: - Enter the password. The password is given to technicians who have been trained by the man

- Click on “Calibrations” and the following screen appears, Setting cursor 5-b) Pressure Verification and Calibration -Click on

This document is the property of NELLCOR PURITAN BENNETT, Inc and is distributed on the express condition that it is neither divulged nor reproduced i

5-c) Verification of the flow measurement chain Prepare the unit under testing as show in the figure 3.2 page III-4 Setting curso

5-d) Verification of the ramp Click on the button "Test R" (Test of Ramp). The unit is set with a 5 minutes ramp, start pres-sure 3 cmH2O

6) Performance verification with Keypad 6-a) Verification of the pressure without computer Set the material as shown on figure 3.1 page III-4 Action

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-11 Action Key(s) Display Check the measured value on the pressure meter, the value must be 14 cmH2O ± 0.

6-b) Verification of the ramp without computer Realise the test set up figure 3.1 page III-4 P/N: M-145MAT00-20 Rev. A - Page Rev.A III-12 Action

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-13 6-c) Verification of the back-up frequency without computer Realise the test set up figure 3.1 page I

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-14 7) Configuration with factory settings a) With the computer When you select the “Reprogramming devic

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-15 8) Entering the serial number and the hour meter values 1- Follow the same steps as those described

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-16 Action Key(s) Display #1-The device is in stand-by mode (the clock is displayed). Press the first key

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-17 Personal Notes GoodKnight 425 / 425 ST

PREFACE This manual provides information necessary to service the GoodKnight 425 and the GoodKnight 425ST Respiratory System. This information is i

B. CALIBRATION PROCEDURE 1) Equipment required * a calibrated pressure meter * a calibrated leak M-BH210 and a connection tube M-213530-05, * a pa

2) Pressure sensor calibration Connect a patient circuit and a pressure meter as shown in figure 3-1 on page III-4 The pressure sensor calibration

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-20 3) Flow sensor calibration 3-a) Set up material 1-Remove the top housing (

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-21 3-b) Calibration 1-Replace the test kit with the calibrated output (f

C. DISASSEMBLY Material : A Torx T10 screwdriver, A grounded wrist strap, A grounded conductive mat. -Remove the four sc

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-23 Top Housing Bottom Housing Internal Frame assembly Inlet baffle foam GoodKnight 425 / 425 ST

D. TROUBLESHOOTING GUIDE P/N: M-145MAT00-20 Rev. A - Page Rev.A III-24 GoodKnight 425 / 425 ST

PROBLEM PROBABLE CAUSE SUGGESTIONS In 01 is displayed. The mask and/or the patient tube is disconnected. -Check the connection between mask, patient

E. ERROR MESSAGES CODE DESCRIPTION CORRECTIVE ACTION Er01 -Settings data checksum error. or -The unit is staying set with a EPAP value > 20cmH2O

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-27 ¨ HISTORY RECORD FORM At the end of this manual, you will find an example of the GoodKnight 425/425ST

REVISION LIST OF GoodKnight 425 / 425ST Service Manual This list of effective pages represents manual P/N M-145MAT00-20, revision A. Revision

P/N: M-145MAT00-20 Rev. A - Page Rev.A III-28 Personal Notes GoodKnight 425 / 425 ST

IV - SPARE PARTS GoodKnight 425 / 425ST Service Manual P/N: M-145MAT00-20 R

Part # Description M-314530-00 Top Housing equipped 425 International M-314530-01 Top Housing equipped 425ST International M-314530-02 Top Housing

Failure

145FDS002.0 CALIBRATION Pressure sensor 1) Adjustment 14 cmH2O: Value displayed (before adjustment) Measured Pressure (befo

GoodKnight 425 / 425ST Service Man ual P/N: M-145MAT00-20 Rev. A - Page Rev.

GoodKnight 425 / 425ST Service Man ual P/N: M-145MAT00-20 Rev. A - Page Rev.

GoodKnight 425 / 425ST Service Manual CONTENTS PREFACE

GoodKnight 425 / 425ST Service Manual P/N: M-145MAT00-20 Rev. A - Page Rev.A 5

GoodKnight 425 / 425ST Service Manual P/N: M-145MAT00-20 Rev. A - Page Rev.

I - GENERAL INFORMATION GoodKnight 425 / 425ST Service Manual P/N: M-145MAT0