NORTH AMERICAN DRÄGER Drager Narkomed 4 User manual

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DrägerService

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Technical

Service

Manual

Part Number: 4111556-001

Date: 20 May 2002

Rev: AB

Narkomed 4

Anesthesia System

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DrägerService

Narkomed 4 Service Manual Table of Contents

Summary of What's New in Rev. AB

DESCRIPTION PAGE

SECTION 1:

Introduction ............................................................... 1-1

SECTION 2:

Diagnostics ............................................................... 2-1

2.1 Main Service Screen ............................................. 2-2

2.2 Service Log Screen .............................................. 2-4

2.3 PMS Criteria Screen ............................................ 2-9

2.4 Monitors .................................................... 2-10

2.5 Peripherals .................................................. 2-17

2.6 O.R. DATA MANAGER Diagnostics ................................ 2-20

2.7 O.R. DATA MANAGER Software Version Window ..................... 2-21

2.8 O.R. DATA MANAGER Printer Configuration ........................ 2-22

SECTION 3:

Troubleshooting ............................................................ 3-1

3.1 Power Supply and Voltage Distribution .............................. 3-1

3.2 Processor Test ................................................. 3-6

3.3 Troubleshooting Guide Flow Charts ................................. 3-6

3.4 O.R. DATA MANAGER Troubleshooting ............................ 3-27

SECTION 4:

Replacement Procedures ..................................................... 4-1

4.1 Cylinder Yoke Assemblies ........................................ 4-2

4.2 Cylinder Pressure Regulators ...................................... 4-5

4.3 Cylinder Cutoff Valves (Canada) ................................... 4-8

4.4 Cylinder and Pipeline Pressure Gauges ............................. 4-11

4.5 Flowmeters .................................................. 4-15

4.6 Flow Control Valves ............................................ 4-19

4.7 Oxygen Supply Failure Protection Device ............................ 4-22

4.8 Oxygen Supply Pressure Alarm Switch (earlier machines) ............... 4-25

4.9 Oxygen Supply Pressure Alarm Whistle (Canada) ..................... 4-28

4.10 Oxygen Ratio Monitor/Controller .................................. 4-30

4.11 Oxygen Ratio Controller (later machines) ............................ 4-34

4.12 Vaporizers ................................................... 4-37

4.13 O

4.14 AV-E Ventilator Controller Assembly ............................... 4-43

4.15 AV-E Ventilator Solenoid Valve ................................... 4-45

4.16 AV-2 and AV2+ Ventilator Controller Assembly ....................... 4-48

4.17 Convenience Outlet AC Power Filter ............................... 4-51

4.18 AV-E Inspiratory Flow Regulator .................................. 4-54

4.19 Ventilator Bellows Valve & Guide Assembly (AV-E Ventilator) ............ 4-56

4.20 Ventilator Bellows Valve & Guide Assembly

Flush Valve ................................................ 4-40

with Pressure Limit Control (AV-2 Ventilator) .................. 4-61

Rev. W

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CONTENTS (continued) NM4

DESCRIPTION PAGE

4.21 Alarm Channel (without oxygen supply pressure alarm switch) ...... 4-65

4.22 Alarm Channel and Oxygen Supply Pressure Alarm Switch ......... 4-68

4.23 Caster ................................................. 4-72

4.24 Battery ................................................ 4-74

4.25 Power Supply Circuit Board ................................. 4-76

4.26 Processor Boards ......................................... 4-78

4.27 Serial Interface Assembly .................................. 4-80

4.28 Backplane Circuit Board Assembly ........................... 4-82

4.29 Multispec Analyzer Assembly (Model 4600) ..................... 4-85

4.30 Multispec Analyzer Assembly (Model 4610) ..................... 4-94

4.31 Front Bezel Assembly .................................... 4-103

4.32 Remote Display Assembly (without Datagrip) .................. 4-106

4.33 Remote Display Assembly (with Datagrip) ..................... 4-108

4.34 Datagrip Assembly ....................................... 4-110

4.35 NIBP Pump and Sensor Circuit Assembly ..................... 4-113

4.36 Pulse Oximeter (SpO

) Assembly ............................ 4-117

4.37 VPO Assembly .......................................... 4-119

4.38 SPIROMED Respiratory Volume Sensor ...................... 4-122

4.39 Oxygen Sensor .......................................... 4-124

4.40 Manual Sphygmomanometer ............................... 4-125

4.41 Boom Arm Assembly (earlier machines) ....................... 4-127

4.42 Display Arm Assembly (later machines) ....................... 4-130

4.43 Internal Strip Chart Printer ............................... 4-133

4.44 O.R. DATA MANAGER CPU Assembly (earlier machines) ......... 4-135

4.45 O.R. DATA MANAGER Sub-Assembly (later machines) ........... 4-138

4.46 Keyboard .............................................. 4-141

4.47 Auxiliary Oxygen Flowmeter ............................... 4-143

4.48 PEEP Valve Magnet Assembly Replacement ................... 4-145

SECTION 5:

Adjustment and Calibration Procedures ...................................5-1

5.1 Cylinder Pressure Regulator Adjustment (except CO

5.1A CO

Cylinder Pressure Regulator Adjustment ....................5-4

) ..............5-2

5.2 Oxygen Supply Pressure Alarm Switch Adjustment (earlier machines) . 5-5

5.3 Oxygen Supply Pressure Alarm Switch Adjustment

(later machines with switch on alarm channel) ..............5-8

5.4 Oxygen Ratio Monitor/Controller (ORMC) Adjustment ............. 5-11

5.5 Oxygen Ratio Controller (ORC) Adjustment ..................... 5-15

5.5A Low Flow Oxygen Ratio Controller (ORC) Adjustment ............5-17A

5.6 Boom Arm Tension Adjustments ............................. 5-18

5.7 Display Arm Tension Adjustments ............................ 5-20

5.8 Oxygen Sensor Zero Calibration .............................. 5-22

5.9 Breathing Pressure Monitor Calibration ........................ 5-24

5.10 Respiratory Flow Monitor Calibration ......................... 5-26

5.11 SpO

Monitor Calibration Check - Nellcor ...................... 5-28

5.11A SpO2 Monitor Calibration Check - Novametrix .................5-29A

5.12 NIBP Inflation Pressure Calibration Check ..................... 5-30

Rev. Z

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NM4 CONTENTS (continued)

DESCRIPTION PAGE

5.13 Multispec Span and Line Block Calibration ....................... 5-32

5.14 Vaporizer Interlock Adjustment ................................ 5-43

5.15 Vaporizer Select Switch Adjustment ............................. 5-45

SECTION 6:

PMS Procedures ........................................................ 6-1

6.1 Safety Testing ............................................... 6-2

6.2 Battery Circuit Test .......................................... 6-3

6.3 Manual Sphygmomanometer .................................... 6-4

6.4 Vapor Exclusion System and Agent Indicator Lamp Test .............. 6-5

6.5 High Pressure Leak Test ...................................... 6-6

6.6 Oxygen Supply Failure Protection ................................ 6-8

6.7 Flowmeter Test ............................................. 6-10

6.8 NAD O

Monitor ............................................ 6-12

6.9 Oxygen Concentration Tests ................................... 6-14

6.10 Gauges ................................................... 6-16

6.11 Freshgas Leak test .......................................... 6-17

6.12 Absorber System ............................................ 6-18

6.13 Ventilator Test ............................................. 6-24

6.14 Bellows Drive Gas Leak Test .................................. 6-26

6.15 "F" Bellows Test ............................................ 6-26

6.16 Pressure Limit Control Test ................................... 6-27

6.17 Ventilator Relief Valve Test ................................... 6-28

6.18 SPIROMED or Ultrasonic Flow Sensor Test ....................... 6-28

6.19 Alarm Circuit Delay Test ..................................... 6-30

6.20 Apnea Pressure Test ......................................... 6-30

6.21 High Pressure Alarm Test .................................... 6-31

6.22 Sub-Atmospheric Pressure Alarm Test ........................... 6-31

6.23 Continuing Pressure Alarm Test ................................ 6-31

6.24 Oxygen Ratio Monitor Control (ORMC) Test ....................... 6-31

6.24A Oxygen Ratio Control (ORC) Test ............................... 6-33

6.25 SpO

/Pulse - Nellcor ......................................... 6-34

6.25A SpO2 Monitor Calibration Check - Novametrix .................... 6-34A

6.26 NIBP Alarm and Pressure Tests ................................ 6-35

6.27 Agent Analyzer Accuracy Test .................................. 6-37

6.28 Open Reservoir Scavenger ..................................... 6-41

6.28A Scavenger Interface, A/C ...................................... 6-43

6.28B Scavenger Interface ......................................... 6-44

6.29 Service Screens ............................................. 6-47

6.30 Oxygen Flush and 100% O

Final Test ........................... 6-48

6.31 Final Check ............................................... 6-49

SECTION 7:

Software Update Procedure ................................................ 7-1

7.1 Software Transfer to PC via Modem .............................. 7-2

7.2 Installing NM4 Software from a PC .............................. 7-2

7.3 Installing NM4 Software from the ORDM .......................... 7-4

7.4 Installing NM4 Software from a PC using the SST ................... 7-5

7.5 Installing NM4 Software from the ORDM using the SST .............. 7-6

Rev. K

iii

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CONTENTS (continued) NM4

SECTION 8: Spare and Replacement Parts

ASSEMBLY/PART PAGE

Monitor Chassis and related assemblies ............................... 8-2, 8-3

Front Bezel Assembly ............................................. 8-4, 8-5

Serial Interface Assembly, Pulse Oximeter Assembly ...................... 8-6, 8-7

Multispec Analyzer Assembly, Model 4600 ............................. 8-8, 8-9

Multispec Analyzer Assembly, Model 4610 ............................8-10, 8-11

AV-E Ventilator Box Assembly .....................................8-12, 8-13

AV-2 Ventilator Controller Assembly .................................8-14, 8-15

AV-E Ventilator Bellows, Valve Case Assembly .........................8-16, 8-17

AV-2 Ventilator Bellows, Valve Case Assembly and Pressure Limit Control . . . 8-18, 8-19

Boom Arm Assembly .............................................8-20, 8-21

Remote Display, Datagrip .........................................8-22, 8-23

Display Arm Assembly ...........................................8-24, 8-25

Pipeline Inlets ..................................................8-26, 8-27

Failsafe Assemblies, Minimum O

Flow Valve Assembly ..................8-28, 8-29

Exclusion System, 3-vapor ...................................... 8-29A, 8-29B

Vapor Select Switches, Vapor Ind. Circuit Board, Gas Selector Switch Assembly 8-30, 8-31 ORMC (Earlier Config.) O

Alarm Switch, Alarm Channel, Alarm Whistle ....8-32, 8-33

ORC Assembly .................................................8-34, 8-35

Alarm Channel Assembly with O

Alarm Switch (Later Configurations) ......8-36, 8-37

Flowmeter Shields, Knobs, Labels, Gauges ............................8-38, 8-39

Flow Tubes, Flow Control Valves ....................................8-40, 8-41

Cylinder Pressure Regulators, O

Flush Valve ..........................8-42, 8-43

Fresh Gas Outlet ............................................. 8-43A, 8-43B

Cylinder Cutoff Valve Assemblies ...................................8-44, 8-45

Canada Fresh Gas Outlet ...................................... 8-45A, 8-45B

Cylinder Yokes and Related Parts ...................................8-46, 8-47

VPO, AC Power, Batteries, Power Supply, Casters ......................8-48, 8-49

O.R. Data Manager, 386 and earlier, Incl. Keyboard .....................8-50, 8-51

Absorber Assembly, Breathing Pressure Hoses, Oxygen Sensor .............8-52, 8-53

Ultrasonic Flow Sensor ........................................ 8-53A, 8-53B

Ultrasonic Flow Sensor Mounting Bracket .......................... 8-53C, 8-53D

Man/Auto Selector Valve ..........................................8-54, 8-55

Man/Auto Selector Valve (Later Design) ..............................8-56, 8-57

Auxiliary O

Flowmeter Assembly ...................................8-58, 8-59

Open Reservoir Scavenger .........................................8-60, 8-61

Open Reservoir Scavenger, old style .................................8-62, 8-63

A/C Scavenger ..................................................8-64, 8-65

Suction Scavenger ...............................................8-66, 8-67

Rev. AA

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NARKOMED 4 ANESTHESIA SYSTEM

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PATIENT INTERFACE PANEL

DISPOSABLE WATER TRAP

REMOTE DISPLAY

DATAGRIP

MANUAL SPHYGMOMANOMETER

MAIN DISPLA

MAIN KEY PANEL

CONTROL

KEY PANEL

STRIP CHART

PRINTER

O.R.DAT

MANAGE

BREATHING SYSTEM SENSOR INTERFACE PANEL (VPO ASSEMBLY)

SV45024

1-0 Rev. F

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NM4 INTRODUCTION

1.0 Recommendations

Because of the sophisticated nature of Draeger Medical, Inc. anesthesia equipment and its critical importance in the operating room setting, it is highly recommended that only appropriately trained and experienced professionals be permitted to service and maintain this equipment. Please contact DrägerService® at (800) 543-5047 for service of this equipment.

Draeger Medical, Inc. also recommends that its anesthesia equipment be serviced at three-month intervals. Periodic Manufacturer’s Service Agreements are available for equipment manufactured by Draeger Medical, Inc. For further information concerning these agreements, please contact us at (800) 543-5047.

Draeger Medical, Inc. products/material in need of factory repair shall be sent to:

DrägerService 3124 Commerce Drive Telford, PA 18969 (Include RMA Number)

HOW TO USE THIS MANUAL

The manual is divided into several sections. The DIAGNOSTICS section describes self-test and service diagnostics for checking the system functions. An understanding of the on-board service capabilities is necessary before any attempt is made to troubleshoot the unit. The TROUBLESHOOTING section lists error codes and provides troubleshooting guides to assist the TSR in locating the source of a problem. The REPLACEMENT PROCEDURES section contains instructions for removal and replacement of the assemblies that are considered field-replaceable. The ADJUSTMENT AND CALIBRATION PROCEDURES section contains the field procedures needed to restore original system specifications. The Periodic Manufacturer’s Service (PMS) PROCEDURE section outlines the steps required to verify the electrical, mechanical and pneumatic safety of the unit and also identifies components requiring periodic replacement.

GENERAL TROUBLESHOOTING GUIDELINES

Troubleshooting the Narkomed 4 should always begin by communicating withthose who observed or experienced a problem with the unit. This may eliminate unnecessary troubleshooting steps. Once a general problem is identified, refer to the troubleshooting flow charts in Section 3 to determine the proper corrective action to be taken.

After a component has been replaced, verify that the unit is operating properly by running the appropriate diagnostic procedure. The PMS PROCEDURE in Section 6 must also be performed after any component has been replaced.

The general arrangement of the Narkomed 4 Anesthesia System is shown on the opposite page. WARNINGS are used in this manual before procedures which if not performed correctly could

result in personal injury. CAUTIONS are used in this manual to alert service personnel to the possibility of damage to the

equipment if a procedure is not performed correctly.

Rev. K

1-1

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INTRODUCTION NM4

Copyright © 1999 by Draeger Medical, Inc. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, or stored in a retrieval system in any form or by any means, electronic or mechanical, including photocopying and recording, without the written permission of Draeger Medical, Inc.

Trademark Notices

CliniDAS, Datagrip, NAD Information Systems, NAD Logo, Narkomed, O.R. Data Manager, O.R. Link, ORM, PC Prep/View, Quality Service For Life, Vigilance Audit, Vitalert, Vitalink and Narkomed GS are registered trademarks of Draeger Medical, Inc. All other products or name brands are trademarks of their respective owners.

Disclaimer

The content of this manual is furnished for informational use only and is subject to change without notice. Draeger Medical, Inc. assumes no responsibility or liability for any errors or inaccuracies that may appear in this manual.

1-2

Rev. M

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NM4 DIAGNOSTICS

2.0 DIAGNOSTICS

The NARKOMED 4 contains a diagnostic system that monitors certain system functions and records their operational status. A series of tests is performed when the system is powered up and the results are displayed on the diagnostics screen shown in Figure 2-1. Further diagnostic functions are available through a series of service screens that can be called up by a Technical Service Representative at the display panel. The following paragraphs provide a description of each of the service screens that can be accessed through touch keys on the display panel. If no display is present upon system power-up, refer to Section 3 of this manual for troubleshooting assistance.

A PREVENTIVE MAINTENANCE DUE message will appear on the screen if the current date exceeds the Periodic Manufacturer’s Service due date stored in the machine.

DIAGNOSTICS

VIDEO TEST PASS FIRMWARE TEST PASS MEMORY TEST BANK1 PASS MEMORY TEST BANK2 PASS TIMER/INTERRUPT TEST PASS ANALOG TEST PASS AUDIO TEST -PRIMARY PASS

-BACKUP PASS POWER SUPPLY STATUS:

-SpO2 PASS FULLY FUNCTIONAL SERIAL I/O TEST PASS CLOCK TEST PASS NON-VOLATILE MEMORY TEST PASS ALTERNATE PROCESSOR TEST PASS

FUNCTIONAL

VERSION: 1.30 97 CF

MONITOR CHECKOUT

Rev. C

Figure 2-1: POWER-UP DIAGNOSTICS SCREEN

2-1

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DIAGNOSTICS (continued) NM4

2.1 Main Service Screen

2.1.1 View Mode

To access the Main Service Screen, press and hold the Selection DIAL, and simultaneously press the MONITOR and SYSTEM CONFIG keys. The View mode service screen shown in Figure 2-2 will appear, displaying the machine serial number, last service date and machine hours accumulated. Version numbers for each software set in the machine are also displayed.

If the MONITORS service screens are accessed in the View mode, current values will be displayed but the operator will not be able to perform calibrations. A VIEW entry will not be logged into the Service Log.

MACHINE SERIAL NUMBER : 00124001 LAST SERVICE DATE : 03-14-96 HOURS RUNNING SINCE LAST SERVICE : 97 TOTAL HOURS RUNNING : 5610

SYSTEM SOFTWARE VERSION : 1.40 TOUCH PANEL SOFTWARE VERSION : 1.02 DATAGRIP SOFTWARE VERSION : 1.01 MULTISPEC SOFTWARE VERSION : 1.04 VPO SOFTWARE VERSION : 1.72 POWER SUPPLY SOFTWARE VERSION : 1.01 PURITAN BENNETT SW VERSION : 1.00 0016FF00 CRITICAR 1100 SW VERSION : 1.01 00171900 CRITICAR POET IQ SW VERSION : 1.00 00173D00 TRAM NET SW VERSION : 1.01 00175E00 SPACELAB LOGGER SW VERSION : 1.00 00178600

SERVICE CODE

VIEW

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

PERIPHERALS

Figure 2-2: VIEW MODE SERVICE SCREEN

2-2

Rev. H

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NM4 DIAGNOSTICS (continued)

2.1.2 Service Mode

Touch the Service Code box on the screen, then scroll through the following list of service codes with the Selection DIAL:

PMS: When performing scheduled Periodic Manufacturer’s Service. INST: For initial installation of the NM4. This selection will establish

the start date for the warranty period.

SRVC: For unscheduled service visits requiring component

replacements or calibrations.

Press the Selection DIAL to enter the service event into the Service Log. The Technical Service Representative ID boxes will appear on the screen as shown in Figure 2-3. Touch the first box, scroll to the desired alpha-numeric with the Selection DIAL, and press the dial to enter the first character of the ID. Enter the remaining three characters in the same manner.After the ID has been entered, the RESET key will be displayed.

NOTE: Following any service procedures, return to this screen and touch the RESET key to enter the current date as the last service date, and to reset the Hours Running Since Last Service to zero. Touching the RESET key also places an entry into the service log.

MACHINE SERIAL NUMBER : 00124001 LAST SERVICE DATE : 03-14-96 HOURS RUNNING SINCE LAST SERVICE : 97 TOTAL HOURS RUNNING : 5610

RESET

MAIN

SERVICE

LOG

PMS

CRITERIA

TECHNICAL SERVICE REPRESENTATIVE I.D.

SERVICE CODE

0 0 0 0

SRVC

Figure 2-3: SERVICE MODE SERVICE SCREEN

Rev. H

MONITORS

PERIPHERALS

2-3

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DIAGNOSTICS (continued) NM4

2.2 Service Log Screen

Touch the SERVICE LOG key to display a list of stored events. Figure 2-4 shows a typical service log screen. The codes displayed are classified as Normal Events, Failed Events, Error Events, Service Events, and Calibration Events. These are listed in Tables 2-1 thru 2-6.

Up to 1000 events may be logged. Touching the PREV PAGE key will move the display backward in time; touching the NEXT PAGE key will move the display forward in time.

SERVICE LOG

DATE TIME PARAMETER CODE DESCRIPTION

07-14-91 18:10 0000FB64 0000 POWER ON 07-14-91 18:13 JOHN C009 RESP FLOW ZERO 07-14-91 18:19 JOHN C008 RESP FLOW SPAN

SERVICE LOG

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

PERIPHERALS

Figure 2-4: SERVICE LOG SCREEN

2-4

Rev. A

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NM4 DIAGNOSTICS (continued)

Table 2-1: NM4 SERVICE LOG NORMAL EVENT CODES

Code Description

0000 Power on

Table 2-2: NM4 SERVICE LOG FAILED EVENT CODES

Code Description Recommended Action

F011 QPDM Address Register Error

F012 QPDM Data Register Error

F013 QPDM Vblank Int Timeout Err

F014 QPDM VRAM Memory Error

F021 PROM CRC Test Error

F031 SRAM Memory Test Error

F051 MFP Bus Error

F052 MFP TimerA Error

F053 MFP TimerB Error

F054 MFP TimerC Error

F055 MFP TimerD Error

F056 System Clock Error

F057 FIFO Empty Interrupt Error

F058 ADC Interrupt Error

F059 CNTOVF Interrupt Error

F061 ADC Interrupt Error

F062 12V to -12V Out of Tol Error

Replace Processor

F063 5V to GND Out of Tol Error

F071 Pri Spkr Static Test Error

F072 Pri Spkr Dynamic Test Error

F073 Pri Spkr FIFO Test Error

F074 Pri Spkr No Vol Test Error

Rev. L

2-5

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DIAGNOSTICS (continued) NM4

Table 2-2 (continued): NM4 SERVICE LOG FAILED EVENT CODES

Code Description Recommended Action

F081 Backup Spkr Dynamic Test Err

F082 Backup Spkr No Vol Test Err

F091 SAO2 Spkr Static Test Error

F092 SAO2 Spkr Dynamic Test Error

F093 SAO2 Spkr No Vol Test Error

F111 Real Time Clock Test Error

F121 Bad File Warning

F122 Bad Files Error

F123 Event Memory Error

F130 Alt Processor Fail

F200 UART1 Internal Init Fail

F201 UART1 Register Readback Fail

F202 UART1 Transmit Interrupt Fail

F203 UART1 Receive Interrupt Fail

F204 UART1 Receive Err Int Fail

F205 UART1 Baud Rate Test 1 Fail

F206 UART1 Baud Rate Test 2 Fail

F207 UART1 Baud Rate Test 3 Fail

F210 UART1 Channel 0 Fail

F211 UART1 Channel 1 Fail

F212 UART1 Channel 2 Fail

F213 UART1 Channel 3 Fail

Replace Processor

2-6

Rev. L

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NM4 DIAGNOSTICS (continued)

Table 2-2 (continued): NM4 SERVICE LOG FAILED EVENT CODES

Code Description Recommended Action

F214 UART1 Channel 4 Fail

F215 UART1 Channel 5 Fail

F216 UART1 Channel 6 Fail

F217 UART1 Channel 7 Fail

F300 UART2 Internal Init Fail

F301 UART2 Register Readbk Fail

F302 UART2 Transmit Interrupt Fail

F303 UART2 Receive Interrupt Fail

F304 UART2 Receive Err Int Fail

F305 UART2 Baud Rate Test 1 Fail

F306 UART2 Baud Rate Test 2 Fail

F307 UART2 Baud Rate Test 3 Fail

F310 UART2 Channel 0 Fail

F311 UART2 Channel 1 Fail

F312 UART2 Channel 2 Fail

F313 UART2 Channel 3 Fail

F314 UART2 Channel 4 Fail

F315 UART2 Channel 5 Fail

F316 UART2 Channel 6 Fail

F317 UART2 Channel 7 Fail

Replace Processor

Rev. L

2-7

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DIAGNOSTICS (continued) NM4

Table 2-3: NM4 SERVICE LOG ERROR EVENTS

Touch Panel Events

Code Description Recommended Action

T001 Bad Device Recalibration Clear obstructions. If recurring,

replace touch panel

Head Assembly Events

Code Description Recommended Action

H001 Head Temperature Error Call Tech. Service

A001 Pattern Adjusted None

Power Supply Events

Code Description Recommended Action

P001 AC Fail Restore AC power

P002 AC Good None

P003 Battery Low Recharge battery. If persistent,

replace battery

P004 Battery Good None

P005 Brick Bad Replace Pwr Supply PCB

MSPEC Events

Code Description Recommended Action

M001 Channel Err Active CPU

M002 Channel Err Inactive CPU

M003 Command Retry

M004 Comm Error

M005 System Fault Max

Replace MSPEC

M006 Versiion ID Retry

M007 Span Fail

M008 Solenoid Stuck

M009 Zero Timeout

M010 Zero Fail Max

2-8

Rev. L

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NM4 DIAGNOSTICS (continued)

Table 2-3 (continued): NM4 SERVICE LOG ERROR EVENTS

MSPEC Events (continued)

Code Description Recommended Action

M011 RX Buffer Overflow Replace MSPEC

M012 No Continuous Data Replace MSPEC

M013 Line Block Diff Clear Blockage

M014 Line Block Less Than Min Clear Blockage

M016 Multispec Shutdown Replace MSPEC

M101 CD Chan Err

M102 Chan Err O2 Info P1

Call Tech. Service

M103 Chan Err O2 Info P2

Datagrip Events

DG00 Datagrip Internal Error

DG01 Datagrip Internal Error

Replace Datagrip

DG02 Datagrip Internal Error

Table 2-3 (continued): NM4 SERVICE LOG ERROR EVENTS

NIBP Events

Code Description Recommended Action

N001 NIBP Mon Error Replace NIBP

N002 NIBP Com Error Replace NIBP

N003 NIBP Bad Data Call Tech. Service

N004 Infl Pres Not GT 30 Check for Leaks

N005 Error Rcvd from NIBP Replace NIBP

N006 NIBP Mode Conflict Replace NIBP

2-8A Rev. L

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DIAGNOSTICS (continued) NM4

Table 2-4: NM4 SERVICE LOG SERVICE EVENT CODES

Code Description

S001 INST

S002 PMS

S003 SRVC

S004 Secondary Serv Screen Entry

S005 Reset Service Date

S006 Service Log Clear

Table 2-5: NM4 SERVICE LOG CALIBRATION EVENT CODES

Code Description Code Description

C001 O2 Store Zero A C009 Respiratory Flow Store Span

C002 O2 Store Zero B C010 Respiratory Flow Store Zero

C003 Line Block Store Reference C011 Pressure Store Span

C004 Gas Analyzer - Start C012 Pressure Store Zero

C005 Gas Analyzer - Continue C013 NIBP Infl Check

C006 NIBP Inflate C014 NIBP Defl Ck

C007 NIBP Stop C015 NIBP Leak Ck

C008 NIBP Take Reading

Rev. L 2-8B

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NM4 DIAGNOSTICS (continued)

Table 2-6: NM4 O.R. DATA MANAGER EVENT CODES

Code Description Recommended Action

V001 VTLK Com Error

Replace ORDM if recurring

V002 VTLK Com Lost

V003 VTLK Com Regained None

V010 ORDM Startup Failure

Replace ORDM

V011 ORDM Inact Startup Failure

Table 2-7: NM4 TEMPLATE EVENT CODES

Code Description Recommended Action

TEM0 Template Defaults Loaded

TEM1 Recreating Tmplt Database

TEM2 Templates Reinitalized

None

TEM3 Templates Reinitalized

TEM4 Factory Defaults Installed

2-8C Rev. L

Page 22

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DIAGNOSTICS (continued) NM4

Touch the PRINT LOG key to obtain a Service Log Printout from the internal printer. Figure 2-5 shows the format of the printed service log.

^^^^^^^^^^^^^^^^^^^^^^^^

************************

SERVICE LOG PRINTOUT

-----------------------MMDDYYHHMM PARAM CODE

0/714911819 JOHN C0/0/8 0/714911813 JOHN C0/0/9 0/714911810/0/0/0/0/FB64 0/0/0/0/

************************

Figure 2-5: SERVICE LOG PRINTOUT

Rev. L 2-8D

Page 23

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NM4 DIAGNOSTICS (continued)

2.3 PMS Criteria Screen

Touch the PMS CRITERIA key to bring up the screen shown in Figure 2-6. Touch the Month window, scroll to the next PMS due month with the Selection

DIAL, and press the dial to enter the month in which the PREVENTIVE MAINTENANCE DUE message will appear on the power-up screen.

SELECT CRITERIA FOR "PREVENTIVE MAINTENANCE" MESSAGE

MONTH : 1991

DEC

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

PERIPHERALS

Figure 2-6: PMS CRITERIA SCREEN

2-9

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DIAGNOSTICS (continued) NM4

2.4 Monitors

Touch the MONITORS key to bring up a second column of touch keys. These keys select the calibration screens for the system sensors.

2.4.1 Oxygen Monitor Screen

The Oxygen Monitor Screen displays current oxygen cell readings and provides a calibration procedure forthe oxygen sensor circuitry. A touch key allows entry of a new zero value. See Figure 2-7.

CURRENT CELL A: 110 CURRENT CELL B: 108

ZERO CALIBRATION PROCEDURE:

- REMOVE FUEL CELL FROM SENSOR HOUSING.

- LET CURRENT CELL VALUES STABILIZE.

- TOUCH "STORE ZERO" KEY TO ENTER CURRENT VALUES AS CALIBRATED VALUES.

- DISCONNECT O2 SENSOR HOUSING CABLE BEFORE RE-INSTALLING FUEL CELL.

- RE-INSTALL FUEL CELL.

- RE-CONNECT CABLE

STORED CELL A ZERO: 3 STORED CELL B ZERO: 6

STORE

ZERO

OXYGEN

PRESSURE

RESPIRATORY

FLOW

SpO2

NIBP

GAS

ANALYZER

LINE BLOCK

CALIBRATION

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

PERIPHERALS

Figure 2-7: OXYGEN MONITOR SCREEN

2-10

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NM4 DIAGNOSTICS (continued)

2.4.2 Breathing Pressure Monitor Screen

The Breathing Pressure Monitor Screen displays current airway pressure and provides a calibration procedure for the pressure sensing circuitry. Touch keys allow entry of new zero and span settings. See Figure 2-8.

CURRENT PRESSURE VALUE : 205

ZERO CALIBRATION PROCEDURE:

- REMOVE PRESSURE SAMPLE LINE FROM ABSORBER; EXPOSE TO AIR.

- LET CURRENT VALUE STABILIZE.

- TOUCH "STORE ZERO" KEY TO ENTER THE CURRENT VALUE AS THE CALIBRATION ZERO.

SPAN CALIBRATION PROCEDURE:

- REMOVE PRESSURE SAMPLE LINE FROM ABSORBER.

- APPLY 50 CM H2O CONSTANT PRESSURE AT SAMPLE LINE, VERIFIED BY A KNOWN, CALIBRATED METER.

- LET CURRENT VALUE STABILIZE.

- TOUCH "STORE SPAN" KEY TO ENTER THE CURRENT VALUE AS THE CALIBRATION SPAN.

STORED ZERO: 244 STORED SPAN: 540

STORE

SPAN

STORE

ZERO

OXYGEN

PRESSURE

RESPIRATORY

FLOW

SpO2

NIBP

GAS

ANALYZER

LINE BLOCK

CALIBRATION

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

PERIPHERALS

Figure 2-8: BREATHING PRESSURE MONITOR SCREEN

2-11

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DIAGNOSTICS (continued) NM4

2.4.3 Respiratory Flow Monitor Screen

The Respiratory Flow Monitor Screen displays the current flow reading and also shows a calibration procedure for the flow sensing circuitry. Touch keys are provided for entry of new zero and span settings. See Figure 2-9.

CURRENT FLOW VALUE : 76

ZERO CALIBRATION PROCEDURE:

- REMOVE SPIROMED SENSOR FROM ABSORBER.

- LET CURRENT VALUE STABILIZE.

- TOUCH "STORE ZERO" KEY TO ENTER THE CURRENT VALUE AS THE CALIBRATION ZERO.

SPAN CALIBRATION PROCEDURE:

- REMOVE SPIROMED SENSOR FROM ABSORBER.

- ATTACH A GAS SUPPLY AT INPUT OF SENSOR, AND A CALIBRATED FLOWMETER AT OUTPUT.

- PROVIDE A STEADY 10 L/MIN FLOW THROUGH SPIROMED SENSOR.

- LET CURRENT VALUE STABILIZE.

- TOUCH "STORE SPAN" KEY TO ENTER THE CURRENT VALUE AS THE CALIBRATION SPAN.

STORED ZERO: 78 STORED SPAN: 161

STORE

SPAN

STORE

ZERO

OXYGEN

PRESSURE

RESPIRATORY

FLOW

SpO2

NIBP

GAS

ANALYZER

LINE BLOCK

CALIBRATION

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

PERIPHERALS

Figure 2-9: RESPIRATORY FLOW MONITOR SCREEN

2-12

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NM4 DIAGNOSTICS (continued)

2.4.4 SpO2 Monitor Screen

The SpO2Screen displays current values for SpO2, Pulse, SpO2Pleth and SpO

Bargraph. See Figure 2-10.

SpO2 VALUE : 98 PULSE VALUE : 75 PLETH VALUE : 125 BARGRAPH VALUE : 12

OXYGEN

PRESSURE

RESPIRATORY

FLOW

SpO2

NIBP

GAS

ANALYZER

LINE BLOCK

CALIBRATION

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

PERIPHERALS

Figure 2-10: SpO2MONITOR SCREEN

2-13

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DIAGNOSTICS (continued) NM4

2.4.5 NIBP Monitor Screen

The NIBP Monitor Screen displays Real Time, Systolic, Diastolic and Mean blood pressure and Pulse.

The TAKE READING touch key will initiate a single NIBP measurement cycle.

A procedure for checking NIBP cuff inflation pressure against an external gauge is also displayed, with touch keys to perform the test. See Figure 2-11.

Refer to Section 6 of this manual for inflation, deflation, and leak testing procedures.

REAL TIME PRESSURE : 0 SYSTOLIC : 130 DIASTOLIC : 78 MEAN : 98 PULSE : 75

NIBP PRESSURE CALIBRATION VERIFICATION:

- PLACE A "T" IN LINE WITH THE BP CUFF.

- ATTACH A PRESSURE GAUGE AT "T".

- TOUCH THE "INFLATE" KEY.

- NIBP MODULE WILL INFLATE CUFF TO 180 MM Hg.

- VERIFY WITH PRESSURE GAUGE.

- TOUCH THE "STOP" KEY TO END THE TEST.

NIBP INFLATION, DEFLATION, AND LEAK CHECKS:

- REFER TO SERVICE MANUAL FOR PROCEDURES.

INFLATION

CHECK

DEFLATION

CHECK

READING

LEAKAGE

INFLATESTOP

TAKE

CHECK

OXYGEN

PRESSURE

RESPIRATORY

FLOW

SpO2

NIBP

GAS

ANALYZER

LINE BLOCK

CALIBRATION

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

PERIPHERALS

Figure 2-11: NIBP MONITOR SCREEN

2-14

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NM4 DIAGNOSTICS (continued)

2.4.6 Gas Analyzer Screen

Current values of CO2,N2O and anesthetic agent are displayed on the Gas Analyzer Screen along with a span calibration procedure. See Figure 2-12. (The scrubber bottle replacement instruction is not displayed on machines having a Model 4610 gas analyzer.)

The MODE window on the gas analyzer screen displays the following messages: INHIBIT during warm-up

READY after 30 minute warm-up

The STATUS window on the gas analyzer screen displays the following messages: IDLE before starting calibration

ZERO IN PROGRESS during calibration ZERO COMPLETE during calibration SPAN IN PROGRESS during calibration PASSED or FAILED after calibration

The complete calibration procedure is outlined in Section 5.

CURRENT CO2 : *INV* MODE: CURRENT N2O : 10 STATUS: CURRENT AGENT : *INV*

SPAN CALIBRATION PROCEDURE:

- WAIT FOR MODE = "READY".

- PERFORM GAS ANALYZER ACCURACY TEST.

- IF TEST FAILS, PERFORM SPAN CAL:

- WITH PATIENT CIRCUIT ENABLED:

- TOUCH "START" KEY,

- WAIT FOR STATUS = "ZERO COMPLETE"

- ATTACH SAMPLE LINE TO CALIBRATION BOTTLE.

- TURN FLOW ON BOTTLE TO 250 ML/MIN

- LET THE CURRENT CELL VALUES STABILIZE

- REMOVE THE SAMPLE LINE FROM THE BOTTLE

- TOUCH "CONTINUE" KEY.

- WAIT FOR STATUS = "PASSED" OR "FAILED"

- REPLACE SCRUBBER BOTTLE ANNUALLY.

OXYGEN

PRESSURE

RESPIRATORY

FLOW

SpO2

NIBP

GAS

ANALYZER

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

Figure 2-12: GAS ANALYZER SCREEN

Rev. C

2-15

STARTCONTINUE

LINE BLOCK

CALIBRATION

PERIPHERALS

Page 30

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DIAGNOSTICS (continued) NM4

2.4.7 Line Block Screen

The current sample pressure is displayed on the Line Block screen along with a calibration procedure and a touch key to enter a setpoint value. See Figure 2-13. The stored reference value is displayed at the lower left corner of the screen.

CURRENT SAMPLE PRESSURE: 200

LINE BLOCK CALIBRATION PROCEDURE:

- WITH PATIENT CIRCUIT ENABLED:

- ENSURE THAT SAMPLE LINE IS CONNECTED AND UNOCCLUDED.

- PLACE A FLOWMETER AT THE SAMPLE EXHAUST.

- ATTACH FLOW RESTRICTOR, FIX 0336, TO PATIENT SAMPLE LINE.

- WAIT FOR VALID CURRENT SAMPLE PRESSURE.

- ADJUST RESTRICTION IN ORDER TO OBTAIN A FLOW OF 100 ML/MIN.

- TOUCH "STORE REFERENCE" KEY.

- FULLY OCCLUDE SAMPLE LINE AND OBSERVE THAT LINE BLOCK ALARM BECOMES ACTIVE AFTER AT LEAST 15 SECONDS.

- REMOVE FLOW RESTRICTOR FROM SAMPLE LINE.

STORED REFERENCE : 200

REFERENCE

STORE

OXYGEN

PRESSURE

RESPIRATORY

FLOW

SpO2

NIBP

GAS

ANALYZER

LINE BLOCK

CALIBRATION

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

PERIPHERALS

Figure 2-13: LINE BLOCK CALIBRATION SCREEN

2-16

Page 31

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NM4 DIAGNOSTICS (continued)

2.5 Peripherals

Touching the PERIPHERALS key brings up a second column of touch keys that are used to select additional service screen functions. When PERIPHERALS is selected, the Relays Status And Control Screen will appear as shown in Figure 2-14.

2.5.1 Relays Status And Control Screen

Printer Relay:

When the ORDM key is selected, the external printer port is connected to the O.R. DATA MANAGER. See Paragraph 2.8

Remote Panel Relay:

When the ORDM key is selected, the Remote Display will show the O.R. DATA MANAGER functions. See Paragraph 2.6. When the NM4 key is selected, the Remote Display shows the NM4 data and alarms.

RELAYS STATUS AND CONTROL SCREEN

PRINTER RELAY:

REMOTE PANEL RELAY:

ORDM NM4

RELAYS

DUMP

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

PERIPHERALS

Figure 2-14: RELAYS STATUS AND CONTROL SCREEN

Rev. A

2-17

Page 32

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DIAGNOSTICS (continued) NM4

2.5.2 Service Dump Screen

The DUMP key will bring up the Service Dump Screen shown in Figure 2-15. This screen displays processor address and register debug information. This screen should be checked whenever the machine is serviced, and any non-zero codes that appear should be recorded and reported to the N.A.D. Engineering Department.

Touch the PRINT DUMP key to print out the codes on the strip chart recorder. Figure 2-16 shows the printed format of the Service Dump.

SERVICE DUMP SCREEN

D0-D3: D4-D7:

A0-A3: A4-A7:

SR/FO:

USP:

MSP:

ORVEC: COUNT:

PSOS: PSOS: PSOS:

PSOS: STACK: STACK: STACK:

00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

PC:

00000000 00000000 00000000

ISP:

00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000

PRINT DUMP

RELAYS

DUMP

MAIN

SERVICE

LOG

PMS

CRITERIA

MONITORS

PERIPHERALS

Figure 2-15: SERVICE DUMP SCREEN

2-18

Page 33

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NM4 DIAGNOSTICS (continued)

^^^^^^^^^^^^^^^^^^^^^^^^

************************

SERVICE DUMP

------------------------

D0/-D1: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ D2-D3: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ D4-D5: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ D6-D7: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ A0/-A1: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ A2-A3: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ A4-A5: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ A6-A7: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ SR/FO: 0/0/0/0/0/0/0/0/

PC: 0/0/0/0/0/0/0/0/ USP: 0/0/0/0/0/0/0/0/ MSP: 0/0/0/0/0/0/0/0/ ISP: 0/0/0/0/0/0/0/0/

ORVEC: 0/0/0/0/0/0/0/0/ COUNT: 0/0/0/0/0/0/0/0/

PSOS: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ PSOS: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ PSOS: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ PSOS: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ PSOS: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ PSOS: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/

PSOS: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ STACK: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ STACK: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ STACK: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ STACK: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ STACK: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/ STACK: 0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/0/

Figure 2-16: SERVICE DUMP PRINTOUT

2-19

Page 34

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DIAGNOSTICS (continued) NM4

2.6 O.R. DATA MANAGER Diagnostics

During Power Up/Initialization and following completion of the NM4 boot sequence, the O.R. DATA MANAGER performs diagnostic tests on its CPU. Figures 2-17A and 2-17B show the O.R. DATA MANAGER boot information that appears on the Remote Display.

Error messages may appear in the display at this time. If the keyboard is not connected at power-up, a keyboard error message appears as shown in the illustration. System configuration or set-up errors may also appear in the area shown in the illustration. If an error message is displayed, the screen display will freeze with a choice of options at the bottom of the screen. The Troubleshooting Guides in Section 3 provide additional information that correlates error messages to recommended hardware replacement.

TESTING INTERRUPT CONTROLLER #1 .............................. PASS

TESTING INTERRUPT CONTROLLER #2 .............................. PASS

TESTING CMOS BATTERY ........................................ PASS

TESTING CMOS CHECKSUM ...................................... PASS

SIZING SYSTEM MEMORY ...................................640/ K FOUND

TESTING SYSTEM MEMORY .................................. 640/ K PASS

TESTING UNEXPECTED INTERRUPTS AND STUCK NMI ................. PASS

TESTING PROTECTED MODE ...................................... PASS

SIZING EXTENDED MEMORY ............................... 0/ 7168K FOUND

TESTING MEMORY IN PROTECTED MODE ......................0/780/ 8K PASS

TESTING PROCESSOR EXCEPTION INTERRUPTS ...................... PASS

BIOS SHADOW RAM ......................................... ENABLED

CONFIGURATION OR SET-UP ERRORS APPEAR HERE

KEYBOARD ERROR OR NO KEYBOARD PRESENT

Figure 2-17A: O.R. DATA MANAGER POWER-UP DIAGNOSTICS SCREEN

2-20

Rev. A

Page 35

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NM4 DIAGNOSTICS (continued)

Press ESC to abort Hard disk boot Booting Hard Drive Loading... EMM 386 V1.21 /Frame = C0/0/0/ /Kb = 7168 /Bdos = FFFF

Executing runtime.bat on the hard drive. Executing numoff.com. Checking the CRC on ordm386.EXE with the CRC saved in the file CRC_ordm.

CRC calculation taking place.

Figure 2-17B: O.R. DATA MANAGER DIAGNOSTICS - SECOND SCREEN

2.7 O.R. DATA MANAGER Software Version Window

After power-up and when the O.R. DATA MANAGER is in its normal display mode, the software version can be displayed by pressing the ALT and V keys simultaneously. The window shown in Figure 2-18 will appear at the center of the display for approximately three seconds. The message in parenthesis (xxxxH) is an identifier that is unique to the particular software installation.

ORDM S/W Ver x.x (xxxxH)

Rev. A

Figure 2-18: SOFTWARE VERSION WINDOW

2-21

Page 36

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DIAGNOSTICS (continued) NM4

2.8 Printer Configuration

The O.R. DATA MANAGER is configured to operate with the Hewlett Packard LaserJet IIP Printer or the Hewlett Packard LaserJet IIIP Printer in the serial port configuration. The following paragraphs describe how to runa printer selftest, and illustrate the configuration menus that appear on the self-test printout page.

2.8.1 Hewlett Packard LaserJet IIP Printer Self-Test:

If the printer ON LINE indicator light is on, press the ON LINE key to take the printer off-line.

While holding the down the ALT key, press the TEST key. The printer display window will show 05 SELF TEST.

A few seconds later, 06 PRINT TEST will appear in the display window. Two pages will print: the self-test printout page and a "cleaning" page.

The self-test printout page lists the settings for both the printer menu and the configuration menu. The list should read as follows:

PRINTING MENU

COPIES 1 FONT SRC I (Internal) FONT NUM 0 TRAYS LC ONLY JOB SIZE LETTER ORIENT P (Portrait) LINES OF TXT 60 MAN FEED OFF SYM SET ROMAN-8

CONFIGURATION MENU:

AUTOCONT ON I/O SERIAL BAUDRATE 9600 ROBUST XON ON DTRPOLAR HI

RAM size: 1536K bytes Firmware Datecode: 19890523 Internal Font Datecode: 19890213 Font Cartridges Installed: NO Installed options: LC TRAY (LETTER)

If the self test printout differs from that shown in the illustration (with the exception of Firmware Datecode and Internal Font Datecode), the printer’s internal setup must be changed. Refer to the instructions in the H-P LaserJet IIP Printer User’s Manual, Chapters 3 and 4, supplied with the printer, for making any changes.

2-22

Page 37

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NM4 DIAGNOSTICS (continued)

2.8.2 Hewlett Packard LaserJet IIIP Printer Self-Test:

If the printer ON LINE indicator light is on, press the ON LINE key to take the printer off-line.

While holding the down the ALT key, press the TEST key. The printer display window will show 05 SELF TEST.

A few seconds later, 06 PRINT TEST will appear in the display window. Two pages will print: the self-test printout page and a "cleaning" page.

The self-test printout page lists the settings for both the printer menu and the configuration menu. The list should read as follows:

PRINTING MENU:

MP SIZE LETTER

COPIES 1 FONT SRC I (Internal) FONT NUM 0 TRAYS LC ONLY JOB SIZE LETTER ORIENT P (Portrait) LINES OF TXT 60 MAN FEED OFF SYM SET ROMAN-8

CONFIGURATION MENU:

AUTOCONT ON I/O SERIAL BAUDRATE 9600 ROBUST XON ON DTRPOLAR HI

RET MEDIUM

RAM size: 1024K bytes

Page Count: 6574

Firmware Datecode: 19910523 Internal Font Datecode: 19910213 Font Cartridges Installed: NO Installed options: LC TRAY (LETTER)

If the self test printout differs from that shown in the illustration (with the exception of Page Count, Firmware Datecode and Internal Font Datecode), the printer’s internal setup must be changed. Refer to the instructions in the H-P LaserJet IIIP Printer User’s Manual, Chapters2-4,supplied with the printer, for making any changes.

2-23

Page 38

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Page 39

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NM4 TROUBLESHOOTING GUIDE

3.0 TROUBLESHOOTING

This section contains information to assist the Draeger Medical, Inc. qualified Technical Service Representative (TSR) in locating electrical faults affecting the NARKOMED 4 monitoring and display devices. Since most troubleshooting efforts begin with verifying power supply voltages, the following paragraphs outline the voltage distribution scheme on the backplane along with power supply and test connector pin identification.

Also contained in this section are troubleshooting guide flow charts that provide a method of tracing faults to specific field replaceable assemblies or sub-assemblies in response to observed failure modes or symptoms.

3.1 Power Supply and Voltage Distribution

3.1.1 In the NARKOMED 4, voltages are distributed to the processor boards and peripheral devices from the backplane assembly. The TSR should start the troubleshooting procedure with voltage checks at the backplane. The wire harnesses originating at the power supply circuit board are connected to J28, J29, and J30 on the backplane.

3.1.2 These voltages can also be measured at test connector J15 on later model backplane assemblies. The acceptable voltage levels are listed in Table 3-1. Figure 3-1 shows the location of these connectors on the backplane. Refer to the replacement procedures in Section 4 for instructions on access to the backplane assembly. Be sure to observe all cautions that are listed.

3.1.3 If all the voltages are present, then ensure that all interconnecting ribbon cables and wire harnesses between suspected assemblies are properly seated. If all cables are properly seated, then proceed to the troubleshooting guides.

3.1.4 If any voltage is missing from backplane connectors J28, J29 or J30, proceed to the power supply voltage measurements in Paragraph 3.1.5.

Rev. H

3-1

Page 40

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TROUBLESHOOTING GUIDE (continued) NM4

TABLE 3-1: BACKPLANE VOLTAGES

LOCATION

VOLTAGE ACCEPTABLE

TEST

CONNECTOR

POWER SUPPLY

CONNECTORS

RANGE

J15-30 J15-32 J15-33 J15-31

J15-17 J15-12 J15-18 J15-23 J15-24 J15-25 J15-27 J15-10

J15-13 J15-20 J15-14 J15-19 J15-21

J28-1 J28-4 J28-5 J28-2,3

J29-1,2 J29-5,6,7 J29-10,11 J29-16 J29-17 J29-18 J29-20 J29-12,13

J30-1,2 J30-5,6 J30-9,10 J30-13,14 J30-3,12

+5SaO2

+15SaO2

-15SaO2 COMMON

+12CRTA +5VMAIN +12CRTB +5VNIBP

0** +5VNIBP * +12VPUMP

COMMON

+5VBKUP +12VPP +5VXTRA +12CRTC COMMON

* Was -12 V on machines with early NIBP assembly.

** Was +12 V on machines with early NIBP assembly.

4.85 to 5.15 VDC

14.25 to 15.75 VDC

-14.25 to -15.75 VDC

11.40 to 12.60 VDC

4.85 to 5.15 VDC

11.40 to 12.60 VDC

4.85 to 5.15 VDC

11.40 to 12.60 VDC

4.85 to 5.15 VDC

11.40 to 12.60 VDC

4.85 to 5.15 VDC

11.40 to 12.60 VDC

3-2

Rev. K

Page 41

NARKOMED 4 BACKPLANE CIRCUIT BOARD ASSEMBLY

J15 J28 J29 J30

NARKOMED 4 BACKPLANE CIRCUIT BOARD ASSEMBLY (EARLY MODELS)

SV49031

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NM4 TROUBLESHOOTING GUIDE (continued)

Figure 3-1: BACKPLANE CONNECTORS FOR POWER SUPPLY CABLES

Rev. A

3-3

Page 42

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TROUBLESHOOTING GUIDE (continued) NM4

3.1.5 The red lamps on the power supply circuit board assembly provide diagnostic information on the status of the power supply. Figure 3-2 shows the location of these lamps. Refer to the replacement procedures in Section 4 for instructions on access to the power supply circuit board.

The red LED (DS2) will be lighted if any of the power supply voltages are out of tolerance. This lamp will also be lighted if the levels of the two backup batteries differ by more than 1.1 volt. The red LED (DS4) will be lighted during the power up self-test period, and will be off after the self-test is completed. This lamp will remain lighted if there is a powerup self-testfailure of themonitoring andcommunication circuitry on the power supply board.

The DC-DC converters supplying the 5V bus are protected by replaceable fuses F1 and F2, and the DC-DC converters supplying the 12V bus are protected by replaceable fuses F3, F4, and F5. Figure 3-2 shows the location of these fuses on the power supply circuit board.

Measure the voltages at connectors J1, J2 and J5 of the Power Supply Circuit Board assembly. The acceptable voltage levels are listed in Table 3-2. Figure 3-2 shows the location of these connectors on the circuit board.

TABLE 3-2: POWER SUPPLY VOLTAGES

LOCATION VOLTAGE ACCEPTABLE RANGE

J1 - 1,2 J1 - 5,6 J1 - 9,10 J1 - 13,14 J1 - 17,18 J1 - 3,4,7,8

J2 - 1,2 J2 - 5,6,7 J2 - 10,11 J2-16 J2-17

*J2-18

J2-20 J2 - 3,4,8,9

+5VBKUP +12VPP +5VXTRA +12CRTC +12VMGM

COMMON

+12CRTA +5VMAIN +12CRTB +5VNIBP +12VNIBP

-12VNIBP +12VPUMP

COMMON

4.85 to 5.15 VDC

11.40 to 12.60 VDC

4.85 to 5.15 VDC

11.40 to 12.60 VDC

4.85 to 5.15 VDC

11.40 to 12.60 VDC

4.85 to 5.15 VDC

11.40 to 12.60 VDC

-11.40 to -12.60 VDC

11.40 to 12.60 VDC

J5-1 J5-4 J5-5 J5 - 2,3

+5SaO2 +15SaO2

-15SaO2 COMMON

* Not used in later design

3-4

4.85 to 5.15 VDC

14.25 to 15.75 VDC

-14.25 to -15.75 VDC

Rev. C

Page 43

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NM4 TROUBLESHOOTING GUIDE (continued)

TO BACKPLANE J23

TO ALARM CHANNEL J4

DS3 (GREEN)

DS1 (GREEN)

DS4 (RED)

DS2 (RED)

POWER SUPPLY CIRCUIT BOARD ASSEMBLY

TO BACKPLANE J30

TO BACKPLANE J29

BACKPLANE

J28

J1 J2

TO MULTISPEC POWER SUPPLY BOARD J2

FROM BATTERY

AND POWER

TRANSFORMER COMPARTMENT

SV49032

Figure 3-2: POWER SUPPLY CIRCUIT BOARD CONNECTORS, LAMPS AND FUSES

Rev. A

3-5

Page 44

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TROUBLESHOOTING GUIDE (continued) NM4

3.2 Processor Test

If a Processor related failure is reported, it will be flagged either as the "Main" or the "Back-Up" processor board. When the System Power switch is turned ON, the unit performs extensive self-diagnostics on its internal hardware. As the diagnostics are performed, each test and its result (PASS - FAIL) appear on the display. First the "Main" or upper processor board is tested and then the "BackUp" or lower processor board is tested. If the "Back-Up" processor is reported defective, press the BACKUP key to obtain a more detailed display of what is nonfunctional on that board.

When diagnosing a processor related problem, use the BACKUP key to toggle between processors. As an additional diagnostic aid, the green lamp on the edge of each processor board, when lighted, indicates the presence of +5 VDC supplied to that board. Refer to the replacement procedures Section 4 for instructions on access to the processor boards.

3.3 Troubleshooting Guide Flow Charts

Table 3-3 lists failure modes that could be detected during the power-up self test and the service diagnostic tests. Each failure mode is keyed to a troubleshooting guide flow chart to assist the Technical Service Representative in locating the problem. These flow charts assume that the machine is plugged into an AC outlet with the correct voltage, and the machine is not running on its backup battery.

Table 3-3: NARKOMED 4 TROUBLESHOOTING GUIDES

FAILURE MODE CORRECTIVE ACTION

New Patient Alarm Not Displayed Loss of O2Monitor Loss of Breathing Pressure Monitor Loss of GAS Monitor Loss of Pulse Oximeter Monitor Loss of Respiratory Volume Monitor Loss of Blood Pressure Monitor Touch Screen Failure No Audio Alarms DataScan function not Logging Data Alarm Silence Failure Vitalink Failure Incorrect Display Measure Data Incorrect No Oxygen Ratio Monitor Alarm No Oxygen Supply Pressure Alarm Display Screens Blank upon System Power-Up Power Supply Voltages Out of Tolerance No Keypanel or Selection Dial Response Internal Printer Not Working

GUIDE 1 GUIDE 2 GUIDE 3 GUIDE 4 GUIDE 5 GUIDE 6 GUIDE 7 GUIDE 8 GUIDE 9 GUIDE 10 GUIDE 11 GUIDE 12 GUIDE 13 GUIDE 14 GUIDE 15 GUIDE 16 GUIDE 17 GUIDE 18 GUIDE 19 GUIDE 20

3-6

Rev. A

Page 45

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 1: New Patient Alarm Not Displayed

START

PROCESSOR TEST

INDICATE PROCESSOR

PROCESSOR BOARD

ARE NEW

PATIENT ALARMS

PRESENT ON

CENTRAL ALARM

PANEL?

PERFORM

AS OUTLINED IN PROCEDURE 3.2

DID

PROBLEM?

REPLACE

AS OUTLINED IN

PROCEDURE 4.26

ARE NEW

PATIENT ALARMS

PRESENT ON

CENTRAL ALARM

PANEL?

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

--------------------------------------

REPLACE REMOTE

DISPLAY AS

OUTLINED IN

PROCEDURE 4.32 OR 4.33

ARE NEW

PATIENT ALARMS

PRESENT ON

CENTRAL ALARM

PANEL?

Rev. A

ARE NEW

PATIENT ALARMS

PRESENT ON

CENTRAL ALARM

PANEL?

REINSTALL ORIGINAL

PROCESSOR BOARD

---------------------------------REPLACE BACKPLANE

ASSEMBLY AS

OUTLINED IN

PROCEDURE 4.28

REINSTALL ORIGINAL

REMOTE DISPLAY

CONTACT NAD

SERVICE DEPT.

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT PASS PMS?

UNIT IS

FUNCTIONAL

3-7

Page 46

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 2: Loss of O

START

CONNECT OXYGEN SENSOR CABLE TO

INTERFACE PANEL

Monitor

"O2 MON ERR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

"O2 SENS DISC"

DISPLAYED ON

CENTRAL ALARM

PANEL?

REPLACE

OXYGEN SENSOR

AS OUTLINED IN

PROCEDURE 4.39

REINSTALL ORIGINAL

VPO BOARD

----------------------------------

PERFORM PROCESSOR

BOARD TEST

AS OUTLINED IN

PROCEDURE 3.2

DID

PROCESSOR TEST

INDICATE PROCESSOR

PROBLEM?

"O2 MON ERR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

REINSTALL ORIGINAL

OXYGEN SENSOR

---------------------------------REPLACE VPO BOARD

AS OUTLINED IN

PROCEDURE 4.37

"O2 MON ERR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

REPLACE

PROCESSOR BOARD

AS OUTLINED IN

PROCEDURE 4.26

"O2 MON ERR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

REINSTALL ORIGINAL

PROCESSOR BOARD

CONTACT NAD

SERVICE DEPT.

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT PASS PMS?

UNIT IS

FUNCTIONAL

3-8

Rev. A

Page 47

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 3: Loss of Breathing Pressure Monitor

START

CONNECT

PILOT LINE TO

INTERFACE PANEL

IS "BAROMED

ERROR" PRESENT

ON CENTRAL ALARM

LINE CONNECTED

TO INTERFACE

VPO BOARD

AS OUTLINED IN

PROCEDURE 4.37

IS "BAROMED

ERROR" PRESENT

ON CENTRAL ALARM

REINSTALL ORIGINAL

VPO BOARD

----------------------------------

PERFORM PROCESSOR

BOARD TEST AS OUTLINED IN PROCEDURE 3.2

PANEL?

IS PILOT

PANEL?

REPLACE

PANEL?

REPLACE

PROCESSOR BOARD

AS OUTLINED IN

PROCEDURE 4.26

IS "BAROMED

ERROR" PRESENT

ON CENTRAL ALARM

PANEL?

REINSTALL ORIGINAL PROCESSOR BOARD

CONTACT NAD

SERVICE DEPT.

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT PASS PMS?

UNIT IS

FUNCTIONAL

Rev. A

DID

PROCESSOR TEST

INDICATE PROCESSOR

PROBLEM?

3-9

Page 48

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 4: Loss of GAS Monitor

START

REPLACE OCCLUDED

SAMPLE LINE OR

WATER TRAP

AGT ERR"PRESENT

ON CENTRAL ALARM

LINE BLK" PRESENT

ON CENTRAL ALARM

REPLACE MULTISPEC ANALYZER ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.29

AGT ERR"PRESENT

ON CENTRAL ALARM

IS "CO2/

PANEL?

IS "CO2

PANEL?

OR 4.30

IS "CO2/

PANEL?

IS "CO2/

AGT ERR"PRESENT

ON CENTRAL ALARM

PANEL?

REPLACE

PROCESSOR BOARD

AS OUTLINED IN

PROCEDURE 4.26

IS "CO2/

AGT ERR"PRESENT

ON CENTRAL ALARM

PANEL?

REINSTALL ORIGINAL

PROCESSOR BOARD

REPLACE BACKPLANE

ASSEMBLY AS

OUTLINED IN

PROCEDURE 4.28

IS "CO2/

AGT ERR"PRESENT

ON CENTRAL ALARM

PANEL?

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

REINSTALL ORIGINAL

MULTISPEC ANALYZER

----------------------------------

PERFORM PROCESSOR

BOARD TEST AS OUTLINED IN PROCEDURE 3.2

3-10

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT PASS PMS?

UNIT IS

FUNCTIONAL

CONTACT NAD

SERVICE DEPT.

Rev. A

Page 49

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 5: Loss of Pulse Oximetry Monitor

START

CHECK

CONNECTIONS

BETWEEN SENSOR

AND SPO2

CABLE

CONNECTOR

CONNECT

SPO2 CABLE TO

INTERFACE PANEL

"OXIMETER ERR"

DISPLAYED ON

CENTRAL ALARM

SENS DISC" PRESENT

ON CENTRAL ALARM

CABLE CONNECTED

TO INTERFACE

PULSE OXIMETER

(SPO2) ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.36

PANEL?

IS "OXI

PANEL?

IS SPO2

PANEL?

REPLACE

IS SPO2

MONITOR DISPLAY

PANEL BLANK?

REPLACE

BACKPLANE

ASSEMBLY AS

OUTLINED IN

PROCEDURE 4.28

IS SPO2

MONITOR DISPLAY

PANEL BLANK?

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

REPLACE

PROCESSOR BOARD

AS OUTLINED IN

PROCEDURE 4.26

IS SPO2

MONITOR DISPLAY

PANEL BLANK?

REINSTALL ORIGINAL

PROCESSOR BOARD

Rev. A

IS SPO2

MONITOR DISPLAY

PANEL BLANK?

REINSTALL ORIGINAL

SPO2 SENSOR

CIRCUIT ASSEMBLY

-----------------------------------PERFORM PROCESSOR

BOARD TEST AS OUTLINED IN PROCEDURE 3.2

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT

PASS PMS

UNIT IS

FUNCTIONAL

CONTACT NAD

SERVICE DEPT.

3-11

Page 50

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 6: Loss of Respiratory Volume Monitor

START

CONNECT

SENSOR CORD TO

INTERFACE PANEL

"SPIROMED ERR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

IS "VOL SEN DISC" DISPLAYED ON RESP. VOLUME

MONITOR?

REPLACE

RESPIRATORY

VOLUME SENSOR

AS OUTLINED IN

PROCEDURE 4.38

"SPIROMED ERR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

REINSTALL ORIGINAL

VPO BOARD

-------------------------------------REPLACE BACKPLANE

ASSEMBLY AS

OUTLINED IN

PROCEDURE 4.28

"SPIROMED ERR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

PERFORM A

COMPLETE PMS

ON THE UNIT

REINSTALL ORIGINAL

RESP. VOLUME SENSOR

-------------------------------------REPLACE VPO BOARD

AS OUTLINED IN

PROCEDURE 4.37

"SPIROMED ERR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

CONTACT NAD

SERVICE DEPT.

3-12

DOES UNIT PASS PMS?

UNIT IS

FUNCTIONAL

Rev. A

Page 51

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 7: Loss of Blood Pressure Monitor

CHECK CUFF

CONNECTION

AT PATIENT

INTERFACE

PANEL

CHECK FOR

LEAKS AT

NIBP CUFF, REPLACE CUFF IF NECESSARY

START

IS "NIBP

MON ERROR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

IS "NIBP

CUFF DISC"

DISPLAYED ON

CENTRAL ALARM

PANEL?

IS "NIBP

CUFF ERROR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

PERFORM

PROCESSOR TEST

AS OUTLINED IN PROCEDURE 3.2

IS "NIBP

MON ERROR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

REPLACE

PROCESSOR BOARD

AS OUTLINED IN

PROCEDURE 4.26

IS "NIBP

MON ERROR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

REPLACE NIBP PUMP

AND SENSOR CIRCUIT

REINSTALL ORIGINAL

NIBP PUMP AND SENSOR

CIRCUIT ASSEMBLY

-----------------------------------------REPLACE BACKPLANE

ASSEMBLY AS

OUTLINED IN

PROCEDURE 4.35

IS "NIBP

MON ERROR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

ASSEMBLY AS

OUTLINED IN

PROCEDURE 4.28

IS "NIBP

MON ERROR"

DISPLAYED ON

CENTRAL ALARM

PANEL?

Rev. A

REINSTALL ORIGINAL PROCESSOR BOARD

CONTACT NAD

SERVICE DEPT.

3-13

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT

PASS PMS?

UNIT IS

FUNCTIONAL

Page 52

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 8: Touch Screen Failure

START

RESPONSIVE?

PROCESSOR TEST

AS OUTLINED IN PROCEDURE 3.2

RESPONSIVE?

REPLACE FRONT

BEZEL ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.31

IS TOUCH

SCREEN

PERFORM

IS TOUCH

SCREEN

REINSTALL ORIGINAL

FRONT BEZEL ASSEMBLY

-----------------------------------------REPLACE BACKPLANE

ASSEMBLY AS

OUTLINED IN

PROCEDURE 4.28

IS TOUCH

SCREEN

RESPONSIVE?

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

REPLACE

PROCESSOR BOARD

AS OUTLINED IN

PROCEDURE 4.26

IS TOUCH

SCREEN

RESPONSIVE?

REINSTALL ORIGINAL

PROCESSOR BOARD

IS TOUCH

SCREEN

RESPONSIVE?

PERFORM A

COMPLETE PMS

ON THE UNIT

CONTACT NAD

SERVICE DEPT.

3-14

DOES UNIT PASS PMS?

UNIT IS

FUNCTIONAL

Rev. A

Page 53

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 9: No Audio Alarms

START

ARE WARNINGS

AND CAUTIONS AUDIBLY

ANNUNCIATED?

CHECK

WIRING HARNESS

FROM SPEAKER

TO BACKPLANE

ARE WARNINGS

AND CAUTIONS AUDIBLY

ANNUNCIATED?

REPLACE SPEAKER

ARE WARNINGS

AND CAUTIONS AUDIBLY

ANNUNCIATED?

REPLACE

BACKPLANE PCB

ASM OUTLINED IN

SECTION 4.28

ARE WARNINGS

AND CAUTIONS AUDIBLY

ANNUNCIATED?

REPLACE MAIN

PROCESSOR BOARD

AS OUTLINED IN

SECTION 4.26

ARE WARNINGS

AND CAUTIONS AUDIBLY

ANNUNCIATED?

Rev. A

ARE WARNINGS

AND CAUTIONS AUDIBLY

ANNUNCIATED?

REINSTALL

ORIGINAL SPEAKER

--------------------------------

PERFORM PROCESSOR

BOARD TEST

AS OUTLINED IN

SECTION 3.2

REINSTALL ORIGINAL

BACKPLANE PCB

CONTACT NAD

SERVICE DEPT.

REINSTALL ORIGINAL

PROCESSOR BOARD

PERFORM A

COMPLETE PMS

ON THE UNIT

FUNCTIONAL

DOES UNIT PASS PMS?

UNIT IS

3-15

Page 54

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 10: DataScan Function not Logging Data

START

ARE

DATASCAN

READINGS PRESENT

ON REMOTE

DISPLAY?

REPLACE

REMOTE DISPLAY

AS OUTLINED IN

PROCEDURE 4.32 OR 4.33

DATASCAN

READINGS PRESENT

ON REMOTE

DISPLAY?

REINSTALL ORIGINAL

REMOTE DISPLAY

------------------------------------REPLACE FRONT

BEZEL ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.31

DATASCAN

READINGS PRESENT

ON REMOTE

DISPLAY?

ARE

DATASCAN

READINGS PRESENT

ON REMOTE

DISPLAY?

REPLACE

BACKPLANE ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.28

ARE

DATASCAN

READINGS PRESENT

ON REMOTE

DISPLAY?

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

PERFORM A

COMPLETE PMS

ON THE UNIT

REPLACE

PROCESSOR BOARD

AS OUTLINED IN

PROCEDURE 4.26

ARE

DATASCAN

READINGS PRESENT

ON REMOTE

DISPLAY?

REINSTALL ORIGINAL

PROCESSOR BOARD

REINSTALL ORIGINAL

FRONT BEZEL ASSEMBLY

------------------------------------

PERFORM PROCESSOR

BOARD TEST

AS OUTLINED IN

PROCEDURE 3.2

DOES UNIT PASS PMS?

UNIT IS

FUNCTIONAL

3-16

CONTACT NAD

SERVICE DEPT.

Rev. A

Page 55

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 11: Alarm Silence Failure

START

SILENCE

FUNCTION OK AT

MAIN AND REMOTE

PANELS

SILENCE

FUNCTION FAIL AT

MAIN PANEL

ONLY?

CHECK CABLES:

BEZEL ASM TO

BACKPLANE J4;

SWITCH PANEL TO

TOUCH PANEL PCB J3

SILENCE

FUNCTION OK AT

MAIN PANEL ?

REPLACE FRONT

BEZEL ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.31

SILENCE

FUNCTION OK AT

MAIN PANEL ?

SILENCE

FUNCTION FAIL AT

REMOTE PANEL

ONLY?

CHECK INTERNAL CABLE FROM PATIENT INTERFACE PANEL TO

BACKPLANEJ8

SILENCE

FUNCTION OK AT

REMOTE PANEL ?

REPLACE

REMOTE DISPLAY

AS OUTLINED IN

PROCEDURE 4.32 OR 4.33

SILENCE

FUNCTION OK AT

REMOTE PANEL ?

PERFORM

PROCESSOR BOARD

TEST AS OUTLINED

IN SECTION 3.2

SILENCE

FUNCTION OK AT

MAIN AND REMOTE

PANELS

REPLACE MAIN

PROCESSOR BOARD

SILENCE

FUNCTION OK AT

MAIN AND REMOTE

PANELS

REINSTALL ORIGINAL

PROCESSOR BOARD

----------------------------------REPLACE BACKPLANE

AS OUTLINED IN

PROCEDURE 4.28

Rev. A

UNIT IS

FUNCTIONAL

REINSTALL ORIGINAL

BEZEL ASSEMBLY

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT PASS PMS?

3-17

REINSTALL ORIGINAL

REMOTE DISPLAY

FUNCTION OK AT

MAIN AND REMOTE

REINSTALL ORIGINAL

BACKPLANE

CONTACT NAD

SERVICE DEPT.

SILENCE

PANELS

Page 56

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 12: Vitalink Failure

START

CONNECT

PERIPHERAL DEVICE

TO CORRECT SERIAL

INTERFACE PORT

DOES HOST

FAIL TO COMMUNICATE

WITH PERIPHERAL

PERIPHERAL

CABLE CONNECTED TO

SERIAL INTERFACE

CHECK PERIPHERAL

DEVICE AND HOST

SERIAL PORT

CONFIGURATION

SETTINGS

DOES HOST

FAIL TO COMMUNICATE

WITH PERIPHERAL

DEVICE?

PORT?

DEVICE?

REINSTALL ORIGINAL

SERIAL INTERFACE

---------------------------------

BACKPLANE ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.28

FAIL TO COMMUNICATE

WITH PERIPHERAL

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

------------------------------------PROCESSOR BOARD

AS OUTLINED IN

PROCEDURE 4.26

ASSEMBLY

REPLACE

DOES HOST

DEVICE?

REPLACE

REPLACE SERIAL

INTERFACE ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.27

DOES HOST

FAIL TO COMMUNICATE

WITH PERIPHERAL

DEVICE?

DOES HOST

FAIL TO COMMUNICATE

WITH PERIPHERAL

DEVICE?

REINSTALL ORIGINAL

PROCESSOR BOARD

CONTACT NAD

SERVICE DEPT.

3-18

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT PASS PMS?

UNIT IS

FUNCTIONAL

Rev. A

Page 57

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 13: Incorrect Display

START

IS WRONG

MONITOR SCREEN

DISPLAYED?

REPLACE

BACKPLANE ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.28

IS WRONG

MONITOR SCREEN

DISPLAYED?

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT

PASS PMS?

Rev. A

CONTACT NAD

SERVICE DEPT.

UNIT IS

FUNCTIONAL

3-19

Page 58

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 14: Measure Data Incorrect

START

IS MEASURE

DATA INCORRECT?

REPLACE MULTISPEC ANALYZER ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.29 OR 4.30

IS MEASURE

DATA INCORRECT?

REINSTALL ORIGINAL

MULTISPEC

ANALYZER ASSEMBLY

------------------------------------ENSURE THAT

COOLING FANS

ARE OPERATING

PERFORM A

COMPLETE PMS

ON THE UNIT

IS MEASURE

DATA INCORRECT?

CONTACT NAD

SERVICE DEPT.

3-20

DOES UNIT

PASS PMS?

UNIT IS

FUNCTIONAL

Rev. A

Page 59

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 15: No Oxygen Ratio Monitor Alarm

START

IS O2/N2O RATIO ALARM FUNCTIONAL?

REPLACE ALARM

CHANNEL ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.21

IS O2/N2O RATIO ALARM FUNCTIONAL?

REINSTALL ORIGINAL

ALARM CHANNEL

ASSEMBLY

-------------------------------------CHECK ORMC

ADJUSTMENTS

AS OUTLINED IN

PROCEDURE 5.4

IS O2/N2O

RATIO ALARM

FUNCTIONAL?

REPLACE

BACKPLANE ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.28

IS O2/N2O

RATIO ALARM

FUNCTIONAL?

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

PERFORM A

COMPLETE PMS

ON THE UNIT

Rev. A

CONTACT NAD

SERVICE DEPT.

3-21

DOES UNIT PASS PMS?

UNIT IS

FUNCTIONAL

Page 60

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 16: No Oxygen Supply Pressure Alarm

START

DOES

OXYGEN SUPPLY

PRESSURE ALARM

FUNCTION?

CHECK

WIRE HARNESS

FROM ALARM SWITCH

TO ALARM CHANNEL

DOES

OXYGEN SUPPLY

PRESSURE ALARM

FUNCTION?

REPLACE OXYGEN

SUPPLY PRESSURE

ALARM SWITCH AS OUTLINED IN PROCEDURE 4.8

OR 4.22

REINSTALL

ORIGINAL OXYGEN

SUPPLY PRESSURE

ALARM SWITCH

----------------------------------------REPLACE ALARM

CHANNEL ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.21 OR 4.22

DOES

OXYGEN SUPPLY

PRESSURE ALARM

FUNCTION?

REINSTALL ORIGINAL

ALARM CHANNEL

ASSEMBLY

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES

OXYGEN SUPPLY

PRESSURE ALARM

FUNCTION?

CONTACT NAD

SERVICE DEPT.

3-22

DOES UNIT

PASS PMS?

UNIT IS

FUNCTIONAL

Rev. A

Page 61

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 17: Display Screens Blank upon System Power-Up

START

ARE BOTH

DISPLAY PANELS

BLANK ON SYSTEM

POWER UP?

REPLACE

BACKPLANE ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.28

ARE BOTH

DISPLAY PANELS

BLANK ON SYSTEM

POWER UP?

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

------------------------------------REPLACE FRONT

BEZEL ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.31

ARE BOTH

DISPLAY PANELS

BLANK ON SYSTEM

POWER UP

REINSTALL ORIGINAL

FRONT BEZEL

ASSEMBLY

CONTACT NAD

SERVICE DEPT.

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT

PASS PMS?

UNIT IS

FUNCTIONAL

Rev. A

3-23

Page 62

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 18: Power Supply Voltages Out of Tolerance

START

ARE

POWER SUPPLY

VOLTAGES OUT OF

TOLERANCE?

REPLACE POWER

SUPPLY CIRCUIT BOARD

AS OUTLINED IN

PROCEDURE 4.25

ARE

POWER SUPPLY

VOLTAGES OUT OF

TOLERANCE?

REINSTALL ORIGINAL

POWER SUPPLY CIRCUIT BOARD

COMPLETE PMS

PERFORM A

ON THE UNIT

DOES UNIT PASS PMS?

CONTACT NAD

SERVICE DEPT.

3-24

UNIT IS

FUNCTIONAL

Rev. A

Page 63

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 19: No Keypanel or Selection Dial Response

START

ARE KEYPANEL

AND SELECTION DIAL

RESPONSIVE?

REPLACE FRONT

BEZEL ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.31

ARE KEYPANEL

AND SELECTION DIAL

RESPONSIVE?

REINSTALL ORIGINAL

FRONT BEZEL ASSEMBLY

-----------------------------------REPLACE

BACKPLANE ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.28

ARE KEYPANEL

AND SELECTION DIAL

RESPONSIVE

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

CONTACT NAD

SERVICE DEPT.

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT

PASS PMS?

UNIT IS

FUNCTIONAL

Rev. A

3-25

Page 64

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 20: Internal Printer Not Working

START

CONNECT PRINTER

CABLE TO

BACKPLANE J1

DOES

INTERNAL PRINTER

FUNCTION?

IS PRINTER

CABLE

CONNECTED?

REPLACE

INTERNAL PRINTER

AS OUTLINED IN

PROCEDURE 4.43

DOES

INTERNAL PRINTER

FUNCTION?

REINSTALL ORIGINAL

INTERNAL PRINTER

------------------------------------REPLACE

BACKPLANE ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.28

DOES

INTERNAL PRINTER

FUNCTION?

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

CONTACT NAD

SERVICE DEPT.

PERFORM A

COMPLETE PMS

ON THE UNIT

DOES UNIT PASS PMS?

UNIT IS

FUNCTIONAL

3-26

Rev. A

Page 65

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NM4 TROUBLESHOOTING GUIDE (continued)

3.4 O.R. DATA MANAGER Troubleshooting

Table 3-4 lists failure modes and symptoms for the O.R. DATA MANAGER. Those that are marked (*) in the table are messages that can appear on the Remote Display during the power-up self test. Each failure mode or symptom is keyed to a recommended action to assist the TSR in locating a problem.

Refer to the Replacement Procedures section for instructions on access to the O.R. DATA MANAGER CPU assembly, cable connections and keyboard.

TABLE 3-4: O. R. DATA MANAGER FAILURE MODES AND SYMPTOM LIST

FAILURE MODE OR SYMPTOM ACTION

Display Blank *Keyboard Error or Keyboard Not Present *Internal Diagnostic Failure upon System Power-Up *Memory Battery Fail *CMOS Checksum Fail *Interrupt Controller #1 Fail *Interrupt Controller #2 Fail *Memory in Protected Mode Fail *Protected Mode Fail *Processor Exception Interrupts Fail *Sizing System Memory 640K Not Found *System Memory 640K Fail *Sizing Extended Memory 00384K Not Found *Communications Error with Host *Disk Error *Disk Full Error *Disk Invalid Error *Disk Not Inserted Error *"B" Drive Error Messages Printer Inoperative

GUIDE 21 GUIDE 22 GUIDE 23 GUIDE 23 GUIDE 23 GUIDE 23 GUIDE 23 GUIDE 23 GUIDE 23 GUIDE 23 GUIDE 23 GUIDE 23 GUIDE 23 GUIDE 24 GUIDE 25 GUIDE 25 GUIDE 25 GUIDE 25 GUIDE 26 GUIDE 27

Rev. A

3-27

Page 66

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 21: Display Blank

START

FIRST:

REMOVE AC POWER

-----------------------------CONNECT REMOTE

DISPLAY CABLE TO INTERFACE PANEL

------------------------------

RESTORE AC POWER

CHECK CABLE

CONNECTIONS:

INTERFACE PANEL

TO BACKPLANE J8

IS REMOTE

DISPLAY BLANK?

IS REMOTE

DISPLAY

PLUGGED IN?

IS INTERFACE

PANEL CABLE CONNECTED?

SWITCH REMOTE PANEL

RELAY AS OUTLINED IN

PARAGRAPH 2.4.1

IS REMOTE

DISPLAY BLANK IN BOTH

NM4 AND ORDM

MODES?

IS REMOTE DISPLAY BLANK IN ORDM MODE

ONLY?

IS REMOTE DISPLAY BLANK

IN NM4 MODE

ONLY?

SWITCH TO

BACKUP PROCESSOR

CONTACT NAD

SERVICE DEPT.

REPLACE

REMOTE DISPLAY

AS OUTLINED IN

PROCEDURE 4.32 OR 4.33

IS REMOTE

DISPLAY BLANK IN BOTH

NM4 AND ORDM

MODES?

REINSTALL ORIGINAL

REMOTE DISPLAY

3-28

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

IS REMOTE

DISPLAY BLANK IN BOTH

MAIN AND BACKUP

PROCESSORS?

REPLACE

BACKPLANE ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.28

IS REMOTE

DISPLAY BLANK?

FUNCTIONAL

UNIT IS

Rev. A

Page 67

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 21: Display Blank (continued)

IS REMOTE DISPLAY BLANK IN MAIN PROCESSOR

ONLY?

REINSTALL ORIGINAL

REMOTE DISPLAY

-------------------------------------CHECK ORDM VIDEO

CABLE CONNECTIONS:

VIDEO INTERFACE BOARD

J3 TO BACKPLANE J14 (ALSO CHECK POWER

CONNECTIONS TO CPU

ASSEMBLY)

IS REMOTE

DISPLAY BLANK?

REPLACE

BACKPLANE ASSEMBLY

AS OUTLINED IN

PROCEDURE4.28

IS REMOTE

DISPLAY BLANK?

REINSTALL ORIGINAL

BACKPLANE ASSEMBLY

------------------------------------REPLACE ORDM

VIDEO CABLE

IS REMOTE

DISPLAY BLANK?

Rev. A

REPLACE MAIN

PROCESSOR BOARD

DISPLAY BLANK?

IS REMOTE

REPLACE BACKUP

PROCESSOR BOARD

CONTACT NAD

SERVICE DEPT.

3-29

REINSTALL ORIGINAL

VIDEO CABLE

---------------------------------REPLACE CPU ASSEMBLY AS

OUTLINED IN

PROCEDURE 4.44

OR 4.45

IS REMOTE

DISPLAY BLANK?

REINSTALL ORIGINAL

CPU ASSEMBLY

UNIT IS

FUNCTIONAL

Page 68

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 22: Keyboard Error or Keyboard Not Present

START

CHECK KEYBOARD

CABLE CONNECTIONS:

INTERNAL KEYBOARD

CABLE TO CPU BOARD J5;

ALSO CHECK FLOATING

KEYBOARD CABLE

CONNECTOR IN

MONITOR BOX

IS KEYBOARD ERROR PRESENT DURING SYSTEM

POWER-UP?

IS KEYBOARD

CABLE CONNECTED

TO CPU?

REPLACE

KEYBOARD

ASSEMBLY AS

OUTLINED IN

PROCEDURE 4.46

IS KEYBOARD ERROR PRESENT DURING SYSTEM

POWER-UP?

IS KEYBOARD

ERROR PRESENT

DURING SYSTEM

POWER-UP?

REINSTALL

ORIGINAL CPU

ASSEMBLY

CONTACT NAD

SERVICE DEPT.

REINSTALL ORIGINAL

KEYBOARD ASSEMBLY

-------------------------------------REPLACE CPU

AS OUTLINED IN

PROCEDURE 4.44 OR 4.45

3-30

UNIT IS

FUNCTIONAL

Rev. A

Page 69

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 23: Internal Diagnostic, Interrupt Controller, or Memory Failure

START

DO ANY

POWER-UP DIAGNOSTIC

TESTS FAIL OR SET-UP

ERRORS OCCUR?

REPLACE

CPU ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.44

OR 4.45

DO ANY

POWER-UP DIAGNOSTIC

TESTS FAIL OR SET-UP

ERRORS OCCUR?

Rev. A

REINSTALL

ORIGINAL CPU

ASSEMBLY

CONTACT NAD

SERVICE DEPT.

UNIT IS

FUNCTIONAL

3-31

Page 70

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 24: Communications Error with Host

START

IS "ORDM

COM ERROR" PRESENT

ON REMOTE DISPLAY

ADVISORY?

SWITCH REMOTE PANEL

RELAY TO ORDM AS

OUTLINED IN PARA. 2.4.1

----------------------------------------CHECK CONFIG OF ORDM:

REF. SETUP AND INSTALLATION SECTION OF NM4 OPERATOR'S MANUAL

--------------------------------------RETURN RELAY TO

NM4 MODE

IS "ORDM

COM ERROR" PRESENT

ON REMOTE DISPLAY

ADVISORY?

SWITCH TO

BACKUP PROCESSOR

IS "ORDM

COM ERROR" PRESENT IN

BOTH MAIN AND BACKUP

PROCESSORS?

REPLACE

DATA CABLE

IS "ORDM

COM ERROR" PRESENT

ON REMOTE DISPLAY

ADVISORY?

REINSTALL ORIGINAL

DATA CABLE

IS "ORDM

COM ERROR" PRESENT

IN MAIN PROCESSOR

ONLY?

PROCESSOR BOARD

REPLACE MAIN

REPLACE BACKUP

PROCESSOR BOARD

--------------------------------REPLACE ORDM CPU

AS OUTLINED IN

PROCEDURE 4.44 OR 4.45

IS "ORDM

COM ERROR" PRESENT

ON REMOTE DISPLAY

ADVISORY?

REINSTALL

ORIGINAL CPU

ASSEMBLY

IS INTERNAL DATA CABLE

CONNECTED?

CHECK DATA CABLE

CONNECTIONS:

CPU BOARD J3

TO BACKPLANE J3

IS "ORDM

COM ERROR" PRESENT

ON REMOTE DISPLAY

ADVISORY?

CONTACT NAD

SERVICE DEPT.

3-32

CONTACT NAD

SERVICE DEPT.

UNIT IS

FUNCTIONAL

Rev. A

Page 71

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 25: Disk Errors

START

DOES

"DISK ERROR"

FLASH ON REMOTE

DISPLAY?

DOES

"DISK NOT INSERTED"

FLASH ON REMOTE

DISPLAY?

DOES

"DISK INVALID"

FLASH ON REMOTE

DISPLAY?

REPLACE DISK

WITH A

FORMATTED

3-1/2" HIGH

DENSITY DISK

INSERT FORMATTED

DATA DISK INTO

DISK DRIVE

REPLACE DISK

WITH A

FORMATTED

3-1/2" HIGH

DENSITY DISK

DOES

"DISK ERROR"

FLASH ON REMOTE

DISPLAY?

DOES

"DISK NOT INSERTED"

FLASH ON REMOTE

DISPLAY?

DOES

"DISK INVALID"

FLASH ON REMOTE

DISPLAY?

DOES

"DISK FULL"

FLASH ON REMOTE

DISPLAY?

UNIT IS

FUNCTIONAL

"DISK GENERAL ERROR"

FLASH ON REMOTE

REPLACE DISK

WITH A

FORMATTED

3-1/2" HIGH

DENSITY DISK

DOES

DISPLAY?

REINSTALL

ORIGINAL CPU

ASSEMBLY

DOES

"DISK FULL"

FLASH ON REMOTE

DISPLAY?

REPLACE

CPU ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.44

OR 4.45

CONTACT NAD

SERVICE DEPT.

Rev. A

3-33

Page 72

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TROUBLESHOOTING GUIDE (continued) NM4

GUIDE 26: "B" Drive Error Messages

START

ARE ANY

"B" DRIVE ERRORS

SHOWN ON REMOTE

DISPLAY?

REPLACE MEMORY

BATTERY AS

OUTLINED IN

PROCEDURE 4.44

ARE ANY

"B" DRIVE ERRORS

SHOWN ON REMOTE

DISPLAY?

REPLACE CPU

ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.44

OR 4.45

ARE ANY

"B" DRIVE ERRORS

SHOWN ON REMOTE

DISPLAY?

REINSTALL

ORIGINAL CPU

ASSEMBLY

CONTACT NAD

SERVICE DEPT.

3-34

UNIT IS

FUNCTIONAL

Rev. A

Page 73

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NM4 TROUBLESHOOTING GUIDE (continued)

GUIDE 27: Printer Inoperative

START

CONNECT

EXTERNAL PRINTER

CABLE

CONNECT PRINTER

POWER CORD

CHECK

PRINTER CABLE

CONNECTIONS:

CPU BOARD J2 TO

BACKPLANE J13

(ALSO CHECK

SERIAL INTERFACE

BOARD J6 TO

BACKPLANE J2)

DOES

EXTERNAL PRINTER

FUNCTION?

EXT. PRINTER

CABLE CONNECTED

TO PRINTER

PORT?

IS EXTERNAL

PRINTER POWER CORD

CONNECTED?

IS PRINTER

INTERNAL CABLE

CONNECTED?

DOES

EXTERNAL PRINTER

FUNCTION?

ORIGINAL CABLE

----------------------------REPLACE ORDM

CPU ASSEMBLY

AS OUTLINED IN

PROCEDURE 4.44

EXTERNAL PRINTER

REINSTALL

OR 4.45

DOES

FUNCTION?

Rev. A

DOES

EXTERNAL PRINTER

FUNCTION?

REPLACE

PRINTER

CABLE

3-35

REINSTALL

ORIGINAL ORDM

CPU ASSEMBLY

CONTACT

NAD SERVICE

DEPARTMENT

UNIT IS

FUNCTIONAL

Page 74

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Page 75

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NM4 REPLACEMENT PROCEDURES

4.0 REPLACEMENT PROCEDURES

This section outlines removal and replacement procedures for the field-replaceable assemblies of the NARKOMED 4 Anesthesia System.

These procedures are to be performed only by a Draeger Medical, Inc. qualified Technical Service Representative (TSR).

The following are the only procedures authorized by Draeger Medical, Inc. to be performed in the field. All other service procedures shall be referred to Draeger Medical, Inc.’s Technical Service Department.

NOTE: The PMS PROCEDURE given in Section 6 must be performed

after any replacement, removal, calibration or adjustment procedure.

Rev. H

4-1

Page 76

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REPLACEMENT PROCEDURES (continued) NM4

4.1 Cylinder Yoke Assemblies

Each cylinder yoke contains a replaceable filter and check valve assembly. Replacement of this assembly requires that the yoke be removed from the anesthesia machine. Figure 4-1 shows a typical cylinder yoke mounting arrangement. Access to the yoke mounting screws and gas line connection requires that the table top be removed from the machine.

4.1.1 Disconnect all pipeline hoses and set the System Power switch to ON.

4.1.2 Close all cylinder valves except the O

valve.

4.1.3 Set the oxygen flow to 5 liters per min.

4.1.4 Open the other gas flow control valves to drain pressure from the system.

4.1.5 Close the O the O

Flush valve to drain oxygen pressure from the system.

cylinder valve, and close the flow control valves. Press

4.1.6 Set the System Power switch to STANDBY.

4.1.7 Remove the cylinder where the yoke is to be replaced.

WARNING: Store the cylinder in a safe place and lay it on its side.

4.1.8 Remove the screws holding the table top to the machine and lift out the table top.

4.1.9 Pull the writing or keyboard tray out to its fully extended position.

4.1.10 Disconnect the gas line fitting at the yoke and remove the two yoke mounting screws.

4.1.11 Remove the filter and check valve assembly from the yoke and install a replacement assembly.

If the entire yoke assembly is being replaced, verify that the pin indexing arrangement and the label are in agreement with the gas designation stamped on the mounting surface of the yoke. Refer to the parts list in Section 8.

NOTE: If the yoke spacer is removed from the frame rail of the machine, be

sure to re-install it in its original position.

4-2

Rev. A

Page 77

YOKE

ASSEMBLY

(TYPICAL)

FILTER AND

CHECK VALVE

ASSEMBLY

GAS LINE

YOKE SPACER

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NM4 REPLACEMENT PROCEDURES (continued)

Figure 4-1: CYLINDER YOKE ASSEMBLY

Rev. H

4-3

Page 78

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REPLACEMENT PROCEDURES (continued) NM4

4.1.12 Position the yoke on the spacer, and install the two mounting screws and lockwashers. Tighten the screws securely. Connect the gas line fitting to the yoke.

4.1.13 If a new cylinder is being installed, remove the old sealing washer from the gas inlet of the yoke and install a new washer.

4.1.14 Install the correct cylinder in the yoke, making sure that the index pins are properly engaged before tightening the handle bolt. The cylinder should hang vertically after the handle is tight.

4.1.15 Perform the following leak test on the yoke assembly:

4.1.15.1 Open the cylinder valve and check for a pressure

indication on the corresponding gauge at the gas instrumentation panel.

NOTE: The cylinder used for this test must

containthe following minimum pressure at 70°F (21°C):

O N O CO

: 1000 Psi

O : 600 Psi

+He : 1000 Psi

: 600 Psi

AIR : 1000 Psi

4.1.15.2 Close the cylinder valve and remove the cylinder fromthe

yoke.

4.1.15.3 For any gas, the pressure should not drop more than 50

Psi in two minutes.

4.1.16 Re-install the cylinder in the yoke.

4.1.17 Replace the table top and its retaining screws.

4.1.18 Replace the pipeline hoses.

4.1.19 Perform the PMS Procedure given in Section 6.

4-4

Rev. A

Page 79

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NM4 REPLACEMENT PROCEDURES (continued)

4.2 Cylinder Pressure Regulators

Access to the cylinder pressure regulators requires that the table top be removed from the anesthesia machine. Figure 4-2 shows the mounting arrangement of the regulators and typical connections.

4.2.1 Disconnect all pipeline hoses and set the System Power switch to ON.

4.2.2 Close all cylinder valves except the O

valve.

4.2.3 Set the oxygen flow to 5 liters per min.

4.2.4 Open the other gas flow control valves to drain pressure from the system.

4.2.5 Close the O the O

Flush valve to drain oxygen pressure from the system.

cylinder valve, and close the flow control valves. Press

4.2.6 Set the System Power switch to STANDBY.

4.2.7 Remove the cylinder corresponding to the regulator to be replaced.

4.2.8 Remove the screws holding the table top to the machine and lift out the table top.

4.2.9 Remove the top drawer from the cabinet and pull the writing or keyboard tray out to its fully extended position.

4.2.10 Disconnect the three compression fittings at the regulator.

4.2.11 Loosen the two setscrews holding the regulator to its mounting bracket and remove the regulator.

Rev. A

4.2.12 Record the serial number of the regulator that was removed, and record the serial number of the replacement regulator.

NOTE: If fittings must be installed in the replacement regulator, use Loctite

#271 (red). Refer to the parts list in Section 8.

NOTE: For Canadian machines, verify that the correct relief valve is

installed in the regulator. Refer to the parts list in Section 8 for CSA items.

4.2.13 Position the replacement regulator in its mounting bracket, and connect the three compression fittings. Do not tighten the fittings yet.

4-5

Page 80

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REPLACEMENT PROCEDURES (continued) NM4

TOP VIEW OF NARKOMED 4

WITH TABLE TOP REMOVED

O CYLINDER

PRESSURE REGULATOR

SET SCREWS

N O CYLINDER

PRESSURE

REGULATOR

AIR OR OPTIONAL

3RD GAS CYLINDER

PRESSURE REGULATOR

TEST GAUGE CONNECTION (TYPICAL)

CPR

Figure 4-2: CYLINDER PRESSURE REGULATORS

4-6

SIDE VIEW

ADJUSTMENT

SCREW

ACORN NUT

Rev. H

Page 81

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NM4 REPLACEMENT PROCEDURES (continued)

4.2.14 Tighten the regulator mounting setscrews to a torque of 50 to 55 in. lbs.

4.2.15 Tighten the compression fittings.

4.2.16 Locate the TEE fitting in the ¼ in. diameter regulator output line, and remove the plug from the TEE fitting.

4.2.17 Set the regulator output pressure in accordance with the Cylinder Pressure Regulator Adjustment given in Section 5.

4.2.18 Perform the following leak test on the high pressure side of the regulator:

4.2.18.1 Open the cylinder valve and check for a pressure

indication on the corresponding gauge at the gas instrumentation panel.

NOTE: The cylinder used for this test must

containthe following minimum pressure at 70°F (21°C):

O N O CO

: 1000 Psi

O : 600 Psi

+He : 1000 Psi

: 600 Psi

AIR : 1000 Psi

4.2.18.2 Close the cylinder valve and remove the cylinder fromthe

yoke.

4.2.18.3 For any gas, the pressure should not drop more than 50

Psi in two minutes.

4.2.19 Re-install the cylinder in the yoke.

4.2.20 Replace the table top and its retaining screws.

4.2.21 Replace the top drawer in the cabinet.

4.2.22 Connect the pipeline hoses.

Rev. A

4.2.23 Perform the PMS Procedure given in Section 6.

4-7

Page 82

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REPLACEMENT PROCEDURES (continued) NM4

4.3 Cylinder Cutoff Valves (Canada)

Access to the cylinder cutoff valves requires removal of the table top from the anesthesia machine. Figure 4-3 shows the locations of the O andN

Ocutoff valve assemblies. The instructions apply toall threeassemblies.

, Air or 3rd gas,

On earlier machines the tubing arrangement may be slightly different from that illustrated.

NOTE: Replacement of the O

Cutoff Valve Assembly shall be performed every

24 months. Documentation shall be created by the service person and a copy distributed to the owner institution. Testing of the O

Cutoff Valve shall be

performed at each PMS. (Perform the flow test given at the end of the following procedure)

4.3.1 Disconnect all pipeline hoses and set the System Power switch to ON.

4.3.2 Close all cylinder valves except the O

valve.

4.3.3 Set the oxygen flow to 5 liters per min.

4.3.4 Open the other gas flow control valves to drain pressure from the system.

4.3.5 Close the O the O

Flush valve to drain oxygen pressure from the system.

cylinder valve, and close the flow control valves. Press

4.3.6 Set the System Power switch to STANDBY.

4.3.7 Remove the screws holding the table top to the machine and lift out the table top.

4.3.8 Remove the top drawer from the cabinet and pull the writing or keyboard tray out to its fully extended position.

4.3.9 Disconnect the compression fittings indicated at points marked C on the illustration.

4.3.10 Cut the tie-wrap clamp and disconnect the flexible tubing from the cutoff valve assembly at the point marked A on the illustration.

NOTE: On later machines with assemblies that have brass fittings instead

of nylon, the flex tubing is attached with a press-on hose clamp instead of a tie strap.

4.3.11 Remove the cylinder cutoff assembly.

4.3.12 Connect the flexible tubing to the replacement cutoff valve assembly and secure it with a new tie-wrap clamp.

4-8

Rev. D

Page 83

SV50526

O2 CYLINDER

CUTOFF VALVE

ASSEMBLY

AIR OR 3RD GAS

CYLINDER

CUTOFF VALVE

ASSEMBLY

N2O CYLINDER

CUTOFF VALVE

ASSEMBLY

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NM4 REPLACEMENT PROCEDURES (continued)

Figure 4-3: CYLINDER CUTOFF VALVES (CANADA)

Rev. H

4-9

Page 84

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REPLACEMENT PROCEDURES (continued) NM4

4.3.13 Connect and tighten the compression fittings at points marked C on the illustration.

4.3.14 Perform the following test: --Remove the plug from the test gauge connection at the Tee fitting in the regulator outlet piping, and install a test gauge.

NOTE: The cylinders used for this test must contain the following minimum

pressure: O

: 1000 PSI AIR : 1000 PSI

+He : 1000 PSI N2O : 745 PSI

--Set the System Power switch to ON.

--For the O

cutoff valve: open the O2cylinder valve and set the oxygen flow to

4 liters per min.

--For the N

O cutoff valve: open the O2cylinder valve and the N2O cylinder

valve. Set each flow to 4 liters per min.

--Verify that regulator outlet pressure is between 43 and 49 PSI.

--Connect the pipeline hoses and pressurize to 50 PSI.

--Turn off the pipeline supply and observe the pipeline pressure gauge.

--The cutoff valve shall open when the pipeline pressure drops through the range of 45 to 40 PSI.

--Close the cylinder valve(s), and close the flow control valve(s).

--Disconnect test pressure gauge and reinstall the plug in the regulator outlet piping.

4.3.15 Replace the table top and its retaining screws.

4.3.16 Replace the top drawer in the cabinet.

4.3.17 Connect the pipeline hoses.

4.3.18 Perform the PMS Procedure given in Section 6.

Flow Test:

--Disconnect all pipeline supplies.

--Install a full O2cylinder on the machine, and open the cylinder valve.

--Turn the System Power switch to ON.

--Set the Inspiratory Flow control to maximum high, and turn the ventilator switch to ON.

--Set the oxygen flow to 10 l/min.

--Verify that the oxygen flow does not drop below 8 l/min. while the ventilator is running.

--Press and hold the O2FLUSH button while observing the O2flowmeter, and verify that the oxygen flow does not drop below 8 l/min.

--If the oxygen flow in either of the above two steps drops below 8 l/min., replace the O2cutoff valve assembly.

4-10

Rev. D

Page 85

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NM4 REPLACEMENT PROCEDURES (continued)

4.4 Cylinder and Pipeline Pressure Gauges

Replacement of the cylinder and pipeline pressure gauges requires that the plexiglass front cover be removed from the gas instrumentation panel, and also the rear cover for access to the gauge connections. Figure 4-4 shows disassembly and mounting details.

4.4.1 Disconnect all pipeline hoses and set the System Power switch to ON.

4.4.2 Close all cylinder valves except the O

valve.

4.4.3 Set the oxygen flow to 5 liters per min.

4.4.4 Open the other gas flow control valves to drain pressure from the

system.

4.4.5 Close the O

the O

Flush valve to drain oxygen pressure from the system.

cylinder valve, and close the flow control valves. Press

4.4.6 Set the System Power switch to STANDBY.

4.4.7 Remove the screws holding the rear cover, and remove the cover.

4.4.8 Remove the screws holding the table top to the machine and lift out

the table top.

4.4.9A Early models: Remove the two screws (from the back) holding the

front plate at the top of the plexiglass cover. Hold the front plate as the screws are removed from the back.

4.4.9B Later models (without the O

O ratio alarm lamp): Remove the six

2/N2

screws holding the flowmeter shield and vapor box cover panel, and remove the panel.

Rev. A

4.4.10 Remove the flow control knobs. Each knob has two setscrews.

NOTE: If a knob must be rotated to allow access to a setscrew,

carefully note its position so that it can be re-assembled in the same position with the "Off Stop" properly set.

4.4.11 Remove the two screws holding the knob guard in place, and remove

the knob guard.

4.4.12 Remove the three screws holding the plexiglass cover over the flow

tubes and gauges, and carefully remove the cover.

4-11

Page 86

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REPLACEMENT PROCEDURES (continued) NM4

REAR VIEW OF NARKOMED 4

FLOWMETER HOUSING

WITH REAR COVER REMOVED

FRONT COVER RETAINER SCREWS

FLEXIBLE TUBING CONNECTION (PIPELINE PRESSURE GAUGES)

COMPRESSION FITTING (CYLINDER PRESSURE GAUGES)

Figure 4-4: CYLINDER AND PIPELINE PRESSURE GAUGES

GAUGE

MOUNTING

NUTS (TYP.)

4-12

Rev. H

Page 87

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NM4 REPLACEMENT PROCEDURES (continued)

NOTE: Intermediate assemblies may need to beremoved to allow

access to the gauge connections and mounting hardware. Be sure to keep a record of the disassembly sequence so that all tubing can be correctly re-assembled.

4.4.13A For the cylinder pressure gauges:

Disconnect the compression fitting at the back of the gauge. Remove the gauge mounting nuts, and remove the gauge from

the front of the panel. Install the replacement gauge in the panel using the flat

washers, lock washers and mounting nuts that were previously removed.

Connect the gas line to the gauge and tighten the compression fitting.

4.3.13B For the pipeline pressure gauges:

Locate the flexible tubing connecting the gauge to the pipeline inlet assembly, cut the tie-wrap tubing clamp at the pipeline inlet and disconnect the tubing.

NOTE: On later machines that havebrass fittings instead

of nylon, the flex tubing is attached with a presson hose clamp instead of a tie strap.

Remove the gauge mounting nuts, and remove the gauge from the front of the panel.

Cut the tie-wrap tubing clamp and disconnect the flexible tubing from the gauge.

Connect a new 7-inch length of tubing (8-inch for the air pipeline pressure gauge) to the replacement gauge and secure it with a new tie-wrap clamp.

Place the gauge in the panel and secure it with the flat washers, lock washers and mounting nuts that were previously removed.

Rev. C

Connect the other end of the flexible tubing to the pipeline inlet assembly and secure it with a tie-wrap clamp.

4.4.14 If a cylinder pressure gauge was replaced, perform the following leak

test:

4-13

Page 88

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REPLACEMENT PROCEDURES (continued) NM4

4.4.14.1 Open the cylinder valve and check for a pressure indication on the corresponding gauge at the gas instrumentation panel.

NOTE: The cylinder used for this test must

containthe following minimum pressure at 70°F (21°C):

O N O CO

: 1000 Psi

O : 600 Psi

+He : 1000 Psi

: 600 Psi

AIR : 1000 Psi

4.4.14.2 Close the cylinder valve and remove the cylinder fromthe yoke.

4.4.14.3 For any gas, the pressure should not drop more than 50 Psi in two minutes.

4.4.15 Re-install the cylinder in the yoke.

4.4.16 Place the plexiglass cover over the gauges and flow tubes, and install the three screws near the top of the cover. Do not over-tighten these screws as the plexiglass may crack.

4.4.17 Place the knob guard over the flow control valves and install its two retaining screws.

4.4.18 Install the flow control knobs and tighten their setscrews. If the knobs are installed properly, their labels will be straight when the knobs are against their clockwise stops.

4.4.19 Replace the front plate at the top of the plexiglass cover and secure it with the hardware that was previously removed.

4.4.20 Replace the rear cover and its retaining screws.

4.4.21 Replace the table top and its retaining screws.

4.4.22 Connect the pipeline hoses.

4.4.23 Perform the PMS Procedure given in Section 6.

4-14

Rev. A

Page 89

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NM4 REPLACEMENT PROCEDURES (continued)

4.5 Flowmeters

The flowmeter tubes are held by compression in gaskets at the top and bottom of each tube. Each upper gasket is seated in an adjustable retainer that allows removal of the tube as shown in Figure 4-5. Access to the flow tubes and their retainers requires removal of the plexiglass cover on the gas instrumentation panel.

4.5.1 Disconnect all pipeline hoses and set the System Power switch to ON.

4.5.2 Close all cylinder valves except the O

valve.

4.5.3 Set the oxygen flow to 5 liters per min.

4.5.4 Open the other gas flow control valves to drain pressure from the system.

4.5.5 Close the O the O

Flush valve to drain oxygen pressure from the system.

cylinder valve, and close the flow control valves. Press

4.5.6 Set the System Power switch to STANDBY.

4.5.7 Remove the screws holding the table top to the machine and lift out the table top.

4.5.8 Early models: Remove the rear flowmeter housing cover.

4.5.9A Early models: Remove the two screws (from the back) holding the front plate at the top of the plexiglass cover. Hold the front plate as the screws are removed from the back.

4.5.9B Later models (without the O

O ratio alarm lamp): Remove the six

2/N2

screws holding the flowmeter shield and vapor box cover panel, and remove the panel.

Rev. A

4.5.10 Remove the flow control knobs. Each knob has two setscrews. NOTE: If a knob must be rotated to allow access to a setscrew,

carefully note its position so that it can be re-assembled in the same position with the "Off Stop" properly set.

4.5.11 Remove the two screws holding the knob guard in place, and remove the knob guard.

4.5.12 Remove the three screws holding the plexiglass cover over the flow tubes and gauges, and carefully remove the cover.

4-15

Page 90

FLOW TUBE

RETAINER SCREW

UPPER FLOW

TUBE RETAINER

FLOW TUBE

LIGHTING CHANNEL

FLOW

RESTRICTOR

SV40605

GASKET

GUIDE RING

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REPLACEMENT PROCEDURES (continued) NM4

Figure 4-5: FLOWMETERS

4-16

Rev. H

Page 91

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NM4 REPLACEMENT PROCEDURES (continued)

4.5.13 Loosen the screw directly above the flowmeter tube to be replaced. Turning the screw counter clockwise will raise the upper flow tube retainer. Raise the retainer far enough to be able to pull the top of the tube outward, and remove the tube.

NOTE: If the bottom of the tube is seated in a flow restrictor, be

sure that the arrangement of the restrictor and its gaskets is not disturbed.

4.5.14 Make sure that the replacement flow tube bears the correct markings and has a ball.

4.5.15 Place the bottom of the flowmeter tube into the guide ring of the lower gasket seal, and position the top of the flow tube into the center guide ring of the top gasket seal. It will be easier to hold the tube if the adjacent lighting channel is pulled forward and temporarily removed.

CAUTION: The flowmeter tube must be properly centered over the

guide rings or damage to the flowmeter tube may occur.

4.5.16 Ensure that the markings on the flow tube are facing forward, and turn the upper retainer screw clockwise until the flow tube is firmly held in place.

CAUTION: Do not over-tighten the screw as the flowmeter tube may

break.

4.5.17 Perform the following leak test on the system:

4.5.17.1 Disconnect the absorber hose from the freshgas outlet.

4.5.17.2 Connect a test gauge and B.P. bulb to the freshgas outlet,

and pressurize the system to 50 cm H

4.5.17.3 The pressure should not drop more than 10 cm H

Oin

thirty seconds.

4.5.18 Disconnect the test gauge and re-connect the absorber hose to the freshgas outlet.

Rev. A

4.5.19 Replace any lighting channels that were previously removed.

4-17

Page 92

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REPLACEMENT PROCEDURES (continued) NM4

4.5.20 Place the plexiglass cover over the gauges and flow tubes, and install the three screws near the top of the cover. Do not over-tighten these screws as the plexiglass may crack.

4.5.21 Place the knob guard over the flow control valves and install its two retaining screws.

4.5.22 Install the flow control knobs and tighten their setscrews. If the knobs are installed properly, their labels will be straight when the knobs are against their clockwise stops.

4.5.23 Replace the front plate at the top of the plexiglass cover and secure it with the hardware that was previously removed.

4.5.24 If applicable, replace the rear flowmeter housing cover.

4.5.25 Replace the table top and its retaining screws.

4.5.26 Connect the pipeline hoses.

4.5.27 Perform the PMS Procedure given in Section 6.

4-18

Rev. A

Page 93

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NM4 REPLACEMENT PROCEDURES (continued)

4.6 Flow Control Valves

The flow control valves have replaceable elements that are removable from the front of the gas instrumentation panel as shown in Figure 4-6. Each flow control knob has a clockwise positive stop arrangement that prevents damage to the valve seat. Whenever a valve cartridge is replaced, the "off stop" must be set as outlined in the following procedure.

4.6.1 Disconnect all pipeline hoses and set the System Power switch to ON.

4.6.2 Close all cylinder valves except the O

valve.

4.6.3 Set the oxygen flow to 5 liters per min.

4.6.4 Open the other gas flow control valves to drain pressure from the system.

4.6.5 Close the O

Flush valve to drain oxygen pressure from the system.

cylinder valve and the O2flow control valve. Press the

4.6.6 Set the System Power switch to STANDBY.

4.6.7 Remove the flow control knobs.

4.6.8 Remove the two screws holding the knob guard in place, and remove the knob guard.

4.6.9 Remove the stop pin nut.

4.6.10 Remove the flow control valve by holding it at the wrench flats and turning it counter-clockwise.

4.6.11 Install the replacement flow control valve in the valve body.

Rev. A

CAUTION: Before tightening the cartridge, rotate the valve shaft

several turns counter-clockwise to prevent bottoming the valve element into the seat when the cartridge is tightened.

4.6.12 Replace the stop pin nut.

4.6.13 Replace the knob guard and secure it with the two mounting screws.

4-19

Page 94

VALVE

HOUSING

FLOW CONTROL VALVE

WRENCH

FLATS

KNOBLABEL

SV20606

STOP PIN NUT

KNOB GUARD

(NEW STYLE)

KNOB GUARD

(OLD STYLE)

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REPLACEMENT PROCEDURES (continued) NM4

Figure 4-6: FLOW CONTROL VALVES

4-20

Rev. H

Page 95

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NM4 REPLACEMENT PROCEDURES (continued)

4.6.14 Set the System Power switch to ON.

4.6.15A For the O

flow control valve:

Open the oxygen cylinder valve. Turn the flow control valve clockwise until the flow rate will not

drop any further. (If the machine has been modified to eliminate the minimum flow feature, turn the valve until the flow rate is zero.)

4.6.15B For the other gas flow control valves:

Open the oxygen cylinder valve, and open the cylinder valve corresponding to the flow control valve replacement.

Set the oxygen flow rate to four liters per minute. Turn the other gas flow control valve clockwise until the flow

rate is zero.

4.6.16 Place the knob on the flow control valve shaft and turn it clockwise until it engages the stop pin. Tighten one of the knob setscrews.

4.6.17 Turn the knob in both directions and ensure that the flow can be controlled over its entire range. When the valve is closed, the knob should be against the clockwise stop. Tighten theremaining setscrew.

4.6.18 If the knob label is not horizontal when the valve is closed, remove the label and install a new label in the correct position.

4.6.19 Connect the pipeline hoses.

4.6.20 Perform the PMS Procedure given in Section 6.

Rev. A

4-21

Page 96

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REPLACEMENT PROCEDURES (continued) NM4

4.7 Oxygen Supply Pressure Failure Protection Device

The oxygen supply failure protection devices (failsafe assemblies) are located behind the gas instrumentation panel. Access to these assemblies requires removal of the rear cover. For earlier machines, replacement assemblies are supplied with all hardware out to the first compression fitting in each line.

On later machines with flowmeter assemblies having an Oxygen Ratio Controller (ORC), failsafe assemblies have an additional inlet port that allows both pipeline and cylinder supplies to be connected directly to the failsafe assemblies. Figure 4-7 shows the arrangement for both types of assemblies.

4.7.1 Disconnect all pipeline hoses and set the System Power switch to ON.

4.7.2 Close all cylinder valves except the O

valve.

4.7.3 Set the oxygen flow to 5 liters per min.

4.7.4 Open the other gas flow control valves to drain pressure from the system.

4.7.5 Close the O

Flush valve to drain oxygen pressure from the system.

cylinder valve and the O2flow control valve. Press the

4.7.6 Set the System Power switch to STANDBY.

4.7.7 Remove the screws holding the rear cover, and remove the cover.

4.7.8 Cut the tie-wrap clamp on the flexible O

control line, and disconnect

the flexible tube.

NOTE: On later machines with assemblies that have brass fittings instead

of nylon, the flex tubing is attached with a press-on hose clamp instead of a tie strap.

4.7.9 Disconnect the compression fittings at the side ports and at the check valve, and remove the assembly.

NOTE: If fittings must be installed in the replacement block assembly, use

Loctite #271 (red). See parts list in Section 8.

4.7.10 Install the replacement failsafeassembly, and tightenall compression fittings.

4.7.11 Connect the flexible tubing to the control port, and install a new tiewrap clamp.

4-22

Rev. C

Page 97

SV70101

O2 CONTROL LINE

EARLIER DESIGN SUPPLIED

WITH FITTINGS

OXYGEN SUPPLY FAILURE PROTECTION DEVICE (N2O CONTROL DEVICE ILLUSTRATED)

OUTLET

CYLINDER INLET

CHECK VALVE

PIPELINE INLET

CONNECTION

LATER DESIGN OF MACHINES

WITH FLOWMETER ASSEMBLIES

HAVING AN ORC

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NM4 REPLACEMENT PROCEDURES (continued)

Figure 4-7: OXYGEN SUPPLY FAILURE PROTECTION DEVICE

Rev. H

4-23

Page 98

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REPLACEMENT PROCEDURES (continued) NM4

4.7.12 Perform the following test:

4.7.12.1 Open the cylinder valves.

4.7.12.2 Set the System Power switch to ON.

4.7.12.3 Set the oxygen flow to five liters per minute.

4.7.12.4 Set the other gas flow to five liters per minute.

4.7.12.5 Close the oxygen cylinder valve.

4.7.12.6 As the oxygen flow decreases, the other gas flow should

also decrease proportionally.

4.7.12.7 Set the System Power switch to STANDBY.

4.7.13 Replace the rear cover and its retaining screws.

4.7.14 Connect the pipeline hoses.

4.7.15 Perform the PMS Procedure given in Section 6.

4-24

Rev. A

Page 99

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NM4 REPLACEMENT PROCEDURES (continued)

4.8 Oxygen Supply Pressure Alarm Switch (earlier machines)

The oxygen supply pressure alarm switch is located behind the gas instrumentation panel. Access to the switch requires removal of the flowmeter housing rear cover. The replacement switch must be tested to ensure that its operating point is set correctly. Figure 4-8 shows the switch assembly on earlier machines where the switch is supported by the O

tubing.

On later machines with flowmeter assemblies having an Oxygen Ratio Controller (ORC), the oxygen supply pressure alarm switch is part of the alarm channel assembly. Refer to the procedure titled "Alarm Channel and Oxygen Supply Pressure Alarm Switch" for specific replacement instructions.

4.8.1 Disconnect all pipeline hoses and set the System Power switch to ON.

4.8.2 Close all cylinder valves except the O

valve.

4.8.3 Set the oxygen flow to 5 liters per min.

4.8.4 Open the other gas flow control valves to drain pressure from the system.

4.8.5 Close the O

Flush valve to drain oxygen pressure from the system.

cylinder valve and the O2flow control valve. Press the

4.8.6 Set the System Power switch to STANDBY.

4.8.7 Remove the screws holding the rear cover, and remove the cover.

4.8.8 Disconnect the two compression fittings at the TEE.

4.8.9 Note the position of the wires on the switch so that the replacement unit can be connected in the same manner. Disconnect the wires from the switch and remove the assembly.

4.8.10 Connect the wires to the replacement assembly; connect and tighten the compression fittings on the O

lines.

Rev. A

4.8.11 Remove the screws holding the table top to the machine and lift out the table top.

4.8.12 Pull the writing or keyboard tray out to its fully extended position.

4.8.13 Locate the TEE fitting in the ¼ in. diameter output line of the O regulator and remove the plug from the TEE fitting.

4.8.14 Connect a dedicated O

test gauge to the TEE fitting.

4-25

Page 100

OXYGEN SUPPLY PRESSURE ALARM SWITCH

O LINES

ALARM WIRES

ADJUSTMENT

WHEEL

REAR VIEW, FLOWMETER HOUSING

WITH REAR COVER REMOVED

INCREASE

SETPOINT

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REPLACEMENT PROCEDURES (continued) NM4

Figure 4-8: OXYGEN SUPPLY PRESSURE ALARM SWITCH

4-26

OSPAS

Rev. H