Dräger Narkomed 2B Service Manual
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DrägerService
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®
Technical
Service
Manual
Part Number: S002011
Date: 20 May 2002
© 2002 Draeger Medical, Inc.
Rev: Y
Narkomed 2B
Anesthesia System
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DrägerService
®
Narkomed 2B Service Manual Table of Contents
Summary of What's New in Rev. Y
DESCRIPTION PAGE
SECTION 1:
Introduction ............................................................... 1-1
SECTION 2:
Diagnostics ............................................................... 2-1
2.1 Service Menu Screen ............................................ 2-2
SECTION 3:
Troubleshooting ............................................................ 3-1
3.1 Power Supply and Voltage Distribution .............................. 3-1
3.2 Battery ...................................................... 3-3
3.3 Troubleshooting Guides .......................................... 3-3
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 Pressure 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 ............................... 4-44
4.15 AV-E Ventilator Solenoid Valve ................................... 4-47
4.16 AV-2 Ventilator Controller Assembly ............................... 4-50
4.17 Convenience Outlet AC Power Filter ............................... 4-53
4.18 AV-E Inspiratory Flow Regulator .................................. 4-56
4.19 Ventilator Bellows Valve and Guide Assembly (AV-E Ventilator) .......... 4-59
4.20 Ventilator Bellows Valve and Guide Asm w/Press Lim Ctrl (AV-2) ......... 4-69
4.21 Alarm Channel (without oxygen supply pressure alarm switch) ........... 4-73
4.22 Alarm Channel and Oxygen Supply Pressure Alarm Switch .............. 4-76
4.23 Caster ...................................................... 4-80
4.24 Battery ..................................................... 4-83
4.25 Power Supply ................................................. 4-86
4.26 Processor Assembly ............................................ 4-89
4.27 CRT Assemblies ............................................... 4-92
4.28 Keypads ..................................................... 4-96
4.29 SPIROMED Respiratory Volume Sensor ............................. 4-99
Flush Valve ................................................ 4-40
2
Rev. T
i
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CONTENTS (continued) NM2B
DESCRIPTION PAGE
4.30 Oxygen Sensor .......................................... 4-101
4.31 Manual Sphygmomanometer ............................... 4-103
4.32 Auxiliary Oxygen Flowmeter ............................... 4-105
4.33 PEEP Valve Magnet Assembly Replacement ................... 4-107
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
2
) ..............5-2
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 Oxygen Sensor Calibration .................................. 5-18
5.7 Breathing Pressure Monitor Calibration ........................ 5-21
5.8 Vaporizer Interlock Adjustment .............................. 5-23
SECTION 6:
PMS Procedure ......................................................6-1
6.1 Electrical Safety ........................................... 6-2
6.2 Self-Diagnostics ...........................................6-4
6.3 Battery Circuit ............................................ 6-5
6.4 Configuration ............................................. 6-5
6.5 Service Data .............................................6-6
6.6 Calibrations ..............................................6-7
6.7A Scavenger, A/C ............................................6-8
6.7B Scavenger, Open Reservoir ...................................6-9
6.7C Scavenger Interface .......................................6-11
6.7D Suction Regulator ........................................ 6-13
6.8 Breathing System ........................................ 6-14
6.9 Manual Sphygmomanometer ................................ 6-22
6.10 Vapor Exclusion System .................................... 6-23
6.11 Yokes & Gauges .......................................... 6-24
6.12 High Pressure Regulator ................................... 6-26
6.13 High Pressure Leak ....................................... 6-28
6.14 Oxygen Supply Failure Protection ............................ 6-31
6.15 Flowmeters ............................................. 6-35
6.16 O
Med................................................. 6-38
2
6.17 Oxygen Concentrations .................................... 6-40
6.18 Auxiliary Oxygen flowmeter ................................. 6-43
6.19A Oxygen Ratio Controller .................................... 6-44
6.19B Oxygen Ratio Monitor Controller ............................. 6-45
6.20 Baromed ............................................... 6-47
6.21 Ventilator .............................................. 6-49
6.22 Bellows Drive Gas Leak: Adult .............................. 6-50
6.23 Spiromed ............................................... 6-51
ii
Rev. W
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NM2B CONTENTS (continued)
DESCRIPTION PAGE
6.24 Manual Sphygmomanometer ................................ 6-39
6.24A Bellows: Adult ........................................... 6-53
6.24B Ventilator Relief Valve: Adult ............................... 6-53
6.25A Bellows: Pediatric External .................................6-54
6.25B Bellows: Pediatric Internal .................................. 6-56
6.26 Trace & Trend ........................................... 6-58
6.27 Pressure Limit Controller .................................. 6-58
6.28 Bellows Peep Valve .......................................6-59
6.29 Audio Silence ............................................ 6-59
6.30 Oxygen Flush Valve ....................................... 6-60
6.31 Final Tests .............................................. 6-61
SECTION 7:
Software Update Procedure .............................................7-1
SECTION 8:
Spare and Replacement Parts
ASSEMBLY/PART PAGE
Monitor Chassis, Front Bezel, Power Supply, Processor Assembly, CRT Assemblies ...... 8-2, 8-3
AV-E Ventilator Box Assembly, Incl. Controller ................................. 8-4, 8-5
AV-2 Ventilator Controller Assembly ......................................... 8-6, 8-7
AV-E Ventilator Bellows Valve & Guide Assembly ............................... 8-8, 8-9
AV-2 Valve Case and Guide Assembly, Press. Limit Control, Bellows Assembly. ...... 8-10, 8-11
Bellows valve assembly details ......................................... 8-11A, 8-11B
Pipeline Inlet Fittings .................................................. 8-12, 8-13
Failsafe Assemblies, Minimum O2Flow Valve Assembly ........................ 8-14, 8-15
Gas Selector Switch and Valves ........................................... 8-16, 8-17
Vapor Exclusion System .............................................. 8-17A, 8-17B
ORMC (Earlier Config.) O2Alarm Switch, Alarm Channel, Alarm Whistle ........... 8-18, 8-19
ORC Assembly ........................................................ 8-20, 8-21
Alarm Channel Assembly with O2Alarm Switch (Later Configurations) ............. 8-22, 8-23
Flowmeter Shields, Knobs, Labels, Gauges .................................. 8-24, 8-25
Flow Tubes, Restrictor Assemblies, Flow Control Valve ......................... 8-26, 8-27
Cyl. Regulator Assemblies, O2Flush Valve and related parts ..................... 8-28, 8-29
CSA Items: Relief Valve, Cylinder Cutoff Valves .............................. 8-30, 8-31
Canada Fresh Gas Outlet ............................................. 8-31A, 8-31B
Cylinder Yokes, Common Parts, Labels ..................................... 8-32, 8-33
Sensor Interface Panel Asms., AC Power, Casters ............................. 8-34, 8-35
Absorber Assembly, Breathing Pressure Hoses, Oxygen Sensor ................... 8-36, 8-37
Ultrasonic Flow Sensor ............................................... 8-37A, 8-37B
Ultrasonic Flow Sensor Mounting Bracket .................................8-37C, 8-37D
Man/Auto Selector Valve ................................................ 8-38, 8-39
Man/Auto Selector Valve (Later Design) .................................... 8-40, 8-41
Auxiliary O2Flowmeter Assembly ......................................... 8-42, 8-43
Open Reservoir Scavenger ............................................... 8-44, 8-45
Open Reservior Scavenger, old style ....................................... 8-46, 8-47
A/C Scavenger ........................................................ 8-48, 8-49
Suction Scavenger ..................................................... 8-50, 8-51
Rev. X
iii
NARKOMED 2B ANESTHESIA SYSTEM
R
Y
A
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BOOM
RM
ALARM
DISPLAY
SYSTEM
CONTROL
KEYS
DATA DISPLA
MONITO
CONTROL
KEYS
MANUAL
SPHYGMOMANOMETER
(OPTIONAL)
BREATHING
SYSTEM SENSOR
INTERFACE PANEL
SV20001
1-0 Rev. F
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NM2B 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’sService Agreementsare availablefor equipmentmanufactured
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 2B should always begin by communicating with those who
observedor experienced a problem with the unit.This mayeliminate 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 2B 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 NM2B
Copyright
Copyright © 2001 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. N
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NM2B DIAGNOSTICS
2.0 DIAGNOSTICS
The Narkomed 2B 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 service screens that can be called up by a TSR at
the display panel. The following paragraphs provide a description of each service screen that
can be accessed through system control keys on the display panel. If no display is present
upon system power-up, refer to Section 3 of this manual for troubleshooting assistance.
NARKOMED 2B
VIDEO TEST PASS VERSION 2.02 DIAGNOSTICS
FIRMWARE TEST PASS COPYRIGHT, NAD INC. 1987-89
MEMORY TEST PASS
TIMERS TEST PASS
ANALOG TEST PASS
AUDIO TEST - PRIMARY PASS
- BACKUP PASS
SERIAL I/O TEST PASS
CLOCK TEST PASS
BACKUP MEMORY TEST PASS
AC POWER TEST PASS
RESERVE POWER TEST PASS
FUNCTIONAL
Figure 2-1: POWER-UP DIAGNOSTICS SCREEN
TRACE
TREND
2-1
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DIAGNOSTICS (continued) NM2B
2.1 Service Menu Screen
To access the Service Menu Screen, press and hold the CONFIG key, and
(while holding the CONFIG key) simultaneously press the 21% and APNEA
ALARM DISABLE keys. These keys are located on the monitor control key
panel. The Service Menu Screen appears as shown in Figure 2-2. Access to the
other service functions is gained through the keys to the right of the service
screen which temporarily function according to their corresponding on-screen
labels.
SERVICE MENU DIAGNOSTICS
CALIBRATION
EXIT
Figure 2-2: SERVICE MENU SCREEN
TRACE
TREND
2-2
Rev. A
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NM2B DIAGNOSTICS (continued)
2.1.1 Diagnostics Menu Screen
Pressing the DIAGNOSTICS key on the Service Menu Screen brings up
the Diagnostics Menu Screen. Figure 2-3 shows a typical Diagnostics
menu which displays the last service date and an error log. To reset the
last service date to the current date, press the RESET DATE key.
NOTE: The RESET DATE key also clears all stored error codes,
so the date should not be reset until the indicated
problems are resolved. If the processor assembly must be
replaced, the original assembly should be returned to the
NAD Technical Service Department with all of its stored
error codes.
Each line in the Error Log is displayed as three groups of hexadecimal
characters, with each group having a left and right character (see
Figure 2-3). Tables 2-1, 2-2 and 2-3 on the following pages list the
possible errors that correspond to the displayed characters in each
group.
DIAGNOSTICS MENU KEY TEST
LAST SERVICE DATE 14-JUN-91
ERROR LOG 00
Group 1 Group 2 Group 3
00 40 RESET DATE
EXIT
Figure 2-3: DIAGNOSTICS MENU SCREEN
TRACE
TREND
Rev. L
2-3
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DIAGNOSTICS (continued) NM2B
Table 2-1: NARKOMED 2B ERROR CODES, GROUP 1
Left
Char. Error(s)
0 No Error 0 No Error
1 System memory fail (checkerboard test) 1 CRT controller fail (readback test)
2 System memory fail (ROM compare test) 2 CRT memory fail (checkerboard test)
3 System memory fail (checkerboard test)
System memory fail (ROM compare test)
4 CTC fail (timer function test) 4 CRT memory fail (ROM compare test)
5 CTC fail (timer function test)
System memory fail (checkerboard test)
6 CTC fail (timer function test)
System memory fail (ROM compare test)
7 CTC fail (timer function test)
System memory fail (ROM compare test)
System memory fail (checkerboard test)
8 CTC fail (interrupt logic test) 8 ROM fail (firmware CRT test)
9 CTC fail (interrupt logic test)
System memory fail (checkerboard test)
Right
Char. Error(s)
3 CRT controller fail (readback test)
CRT memory fail (checkerboard test)
5 CRT memory fail (ROM compare test)
CRT controller fail (readback test)
6 CRT memory fail (ROM compare test)
CRT memory fail (checkerboard test)
7 CRT memory fail (ROM compare test)
CRT memory fail (checkerboard test)
CRT controller fail (readback test)
9 ROM fail (firmware CRT test)
CRT controller fail (readback test)
A CTC fail (interrupt logic test)
System memory fail (ROM compare test)
B CTC fail (interrupt logic test)
System memory fail (ROM compare test)
System memory fail (checkerboard test)
C CTC fail (interrupt logic test)
CTC fail (timer function test)
D CTC fail (interrupt logic test)
CTC fail (timer function test)
System memory fail (checkerboard test)
E CTC fail (timer function test)
CTC fail (interrupt logic test)
System memory fail (ROM compare test)
F CTC fail (interrupt logic test)
CTC fail (timer function test)
System memory fail (ROM compare test)
System memory fail (checkerboard test)
A ROM fail (firmware CRT test)
CRT memory fail (checkerboard test)
B ROM fail (firmware CRT test)
CRT memory fail (checkerboard test)
CRT controller fail (readback test)
C ROM fail (firmware CRT test)
CRT memory fail (ROM compare test)
D ROM fail (firmware CRT test)
CRT memory fail (ROM compare test)
CRT controller fail (readback test)
E ROM fail (firmware CRT test)
CRT memory fail (ROM compare test)
CRT memory fail (checkerboard test)
F ROM fail (firmware CRT test)
CRT memory fail (ROM compare test)
CRT memory fail (checkerboard test)
CRT controller fail (readback test)
2-4
Rev. L
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NM2B DIAGNOSTICS (continued)
Table 2-2: NARKOMED 2B ERROR CODES, GROUP 2
Left
Char. Error(s)
0 No Error 0 No Error
1 Backup audio fail (sound generation test) 1 A/D conv. fail (analog V out of range)
2 Serial port B fail (channel A on UART) 2 Primary audio fail (speaker test)
3 Backup audio fail (sound generation test)
Serial port B fail (channel A on UART)
4 Serial port A fail (channel B on UART) 4 Primary audio fail (sound gen. test)
5 Serial port A fail (channel B on UART)
Backup audio fail (sound generation test)
6 Serial port A fail (channel B on UART)
Serial port B fail (channel A on UART)
7 Serial port A fail (channel B on UART)
Serial port B fail (channel A on UART)
Backup audio fail (sound generation test)
8 Clock fail (cannot read) 8 Backup audio fail (speaker test)
9 Clock fail (cannot read)
Backup audio fail (sound generation test)
Right
Char. Error(s)
3 A/D conv. fail (analog V out of range)
Primary audio fail (speaker test)
5 Primary audio fail (sound gen. test)
A/D conv. fail (analog V out of range)
6 Primary audio fail (sound gen. test)
Primary audio fail (speaker test)
7 Primary audio fail (sound gen. test)
Primary audio fail (speaker test)
A/D conv. fail (analog V out of range)
9 Backup audio fail (speaker test)
A/D conv. fail (analog V out of range)
A Clock fail (cannot read)
Serial port B fail (channel A on UART)
B Clock fail (cannot read)
Serial port B fail (channel A on UART)
Backup audio fail (sound generation test)
C Clock fail (cannot read)
Serial port A fail (channel B on UART)
D Clock fail (cannot read)
Serial port A fail (channel B on UART)
Backup audio fail (sound generation test)
E Clock fail (cannot read)
Serial port A fail (channel B on UART)
Serial port B fail (channel A on UART)
F Clock fail (cannot read)
Serial port A fail (channel B on UART)
Serial port B fail (channel A on UART)
Backup audio fail (sound generation test)
A Backup audio fail (speaker test)
Primary audio fail (speaker test)
B Backup audio fail (speaker test)
Primary audio fail (speaker test)
A/D conv. fail (analog V out of range)
C Backup audio fail (speaker test)
Primary audio fail (sound gen. test)
D Backup audio fail (speaker test)
Primary audio fail (sound gen. test)
A/D conv. fail (analog V out of range)
E Backup audio fail (speaker test)
Primary audio fail (sound gen. test)
Primary audio fail (speaker test)
F Backup audio fail (speaker test)
Primary audio fail (sound gen. test)
Primary audio fail (speaker test)
A/D conv. fail (analog V out of range)
Rev. L
2-5
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DIAGNOSTICS (continued) NM2B
Table 2-3: NARKOMED 2B ERROR CODES, GROUP 3
Left
Char. Error(s)
0 No Error 0 No Error
1 Backup memory fail (ROM compare test) 1 Clock fail (write/readback test)
2 Backup memory fail (array recall test) 2 Clock fail (original time test)
3 Backup memory fail (ROM compare test)
Backup memory fail (array recall test)
4 AC power fail 4 Clock fail (seconds not incrementing)
5 AC power fail
Backup memory fail (ROM compare test)
6 AC power fail
Backup memory fail (array recall test)
7 AC power fail
Backup memory fail (array recall test)
Backup memory fail (ROM compare test)
8 Reserve power fail (batt. low/disconnected) 8 Backup memory fail (checkerboard test)
9 Reserve power fail (batt. low/disconnected)
Backup memory fail (ROM compare test)
Right
Char. Error(s)
3 Clock fail (write/readback test)
Clock fail (original time test)
5 Clock fail (seconds not incrementing)
Clock fail (write/readback test)
6 Clock fail (seconds not incrementing)
Clock fail (original time test)
7 Clock fail (seconds not incrementing)
Clock fail (original time test)
Clock fail (write/readback test)
9 Backup memory fail (checkerboard test)
Clock fail (write/readback test)
A Reserve power fail (batt. low/disconnected)
Backup memory fail (array recall test)
B Reserve power fail (batt. low/disconnected)
Backup memory fail (array recall test)
Backup memory fail (ROM compare test)
C Reserve power fail (batt. low/disconnected)
AC power fail
D Reserve power fail (batt. low/disconnected)
AC power fail
Backup memory fail (ROM compare test)
E Reserve power fail (batt. low/disconnected)
AC power fail
Backup memory fail (array recall test)
F Reserve power fail (batt. low/disconnected)
AC power fail
Backup memory fail (array recall test)
Backup memory fail (ROM compare test)
A Backup memory fail (checkerboard test)
Clock fail (original time test)
B Backup memory fail (checkerboard test)
Clock fail (original time test)
Clock fail (write/readback test)
C Backup memory fail (checkerboard test)
Clock fail (seconds not incrementing)
D Backup memory fail (checkerboard test)
Clock fail (seconds not incrementing)
Clock fail (write/readback test)
E Backup memory fail (checkerboard test)
Clock fail (seconds not incrementing)
Clock fail (original time test)
F Backup memory fail (checkerboard test)
Clock fail (seconds not incrementing)
Clock fail (original time test)
Clock fail (write/readback test)
2-5A Rev. L
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NM2B DIAGNOSTICS (continued)
With the exception of the error codes corresponding to AC power and battery
failure, the codes listed in Tables 2-1 thru 2-3 indicate a possible problem in
the NARKOMED 2B processor assembly.
Troubleshooting should begin with a check of the power supply voltages on the
processor board (see Section 3) followed by a check of all connections to the
processor assembly. Refer to Section 4 for removal and replacement procedures
for the field-replaceable assemblies in the NARKOMED 2B.
Rev. L
2-5B
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DIAGNOSTICS (continued) NM2B
2.1.1.1 Key Panel Test Screen
Pressing the KEY TEST key in the Diagnostics Menu
Screen allows the TSR to check each key on the display
panel. As each key on the display panel is pressed, a
corresponding key is illuminated on the Key Panel Test
Screen as shown in Figure 2-4.
NOTE: The TREND key should be pressed last,
because it also exits the Key Panel Test
Screen.
If the correct keypanel response is not obtained, refer to
Section 3 for the appropriate troubleshooting procedure.
Figure 2-4: KEY PANEL TEST SCREEN
2-6
EXIT
TRACE
TREND
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NM2B DIAGNOSTICS (continued)
2.1.2 Calibration Menu Screen
Pressing the CALIBRATION key on the Service Menu Screen brings up
the Calibration Menu Screen. This menu allows the TSR to perform
calibration for the Oxygen Analyzer sensor and the Breathing Pressure
Monitor. Figure 2-5 shows a typical Calibration Menu Screen. The fourdigit numbers in the left column show the current values, while the
numbers in the right column show the values stored from the previous
calibration.
For a valid zero calibration of the Oxygen Analyzer sensor, the two
offset readings should be between 125 and 145, and the difference
between Cell A and Cell B should be no greater than 8. Pressing the
O2MED key stores the values, and the message OXYGEN OFFSET
READINGS STORED appears on the screen. Refer to Section 5 of this
manual for the complete calibration procedure.
For a valid calibration of the Breathing Pressure Monitor, the pressure
span reading at 60 cm H
the BAROMED key stores the value, and the message PRESSURE
SPAN READING STORED appears on the screen. Refer to Section 5 of
this manual for the complete calibration procedure.
O should be between 465 and 519. Pressing
2
CALIBRATION MENU O2MED
OFFSET O2 CELL A 0138 0127
OFFSET O2 CELL B 0138 0129
BAROMED
OXYGEN OFFSET READINGS STORED
TRACE
PRESSURE SPAN (60 cm H2O) 0243 0481
Figure 2-5: CALIBRATION MENU SCREEN
Rev. A
2-7
EXIT
TREND
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NM2B 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 2B monitoring and display devices. Since most troubleshooting efforts
begin with verifying power supply voltages, the following paragraph outlines the
voltage distribution scheme within the machine along with test points for each of the
voltages.
3.1 Power Supply and Voltage Distribution
In the NARKOMED 2B the power supply outputs at J10 are connected to J5
on the processor board for distribution. The CRTs are powered by 12 VDC; the
ventilator controller and the alarm channel are powered by 8 VDC. The
processor is powered by 5 VDC along with the other voltages. Under normal
load conditions these voltages are measured at the (+) end of capacitors C23,
C24 and C31 on the processor board. See Figure 3-1. The voltmeter return
should be connected to the (-) end of one of the capacitors. Table 3-1 lists the
acceptable range for each voltage.
TABLE 3-1: PROCESSOR BOARD VOLTAGES
LOCATION VOLTAGE ACCEPTABLE RANGE
+ End of C23 + 5 VDC 4.85 to 5.15 VDC
+ End of C24 + 8 VDC 7.45 to 8.47 VDC
+ End of C31 +12VDC 11.52 to 12.24 VDC
The power supply voltages can also be measured in an unloaded condition.
CAUTION
: Before disconnecting the output cable from J10 on the power
supply assembly, turn the System Power switch to STANDBY,
and disconnect the data cable from J9 on the power supply
assembly.
The test points are:
+5V: J10-3,-4
+8V: J10-1,-2
+12V: J10-5,-6
Com: J10-7,-8
Rev. H
3-1
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TROUBLESHOOTING GUIDE (continued) NM2B
TOP VIEW OF
PROCESSOR ASSEMBLY
SV20313
C31
J5
C24
C23
Figure 3-1: PROCESSOR BOARD VOLTAGE TEST POINTS
3-2
Rev. A
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NM2B TROUBLESHOOTING GUIDE (continued)
3.2 Battery
While the machine is operating from an AC line, the battery voltage at full
charge should be within the range of 12.83 to 14.18 VDC. Battery voltage can
be measured between J7-3(+) and J7-4(-). During battery operation, the low
battery cutoff voltage should be within the range of 9.79 to 10.82 VDC.
3.3 Troubleshooting Guides
Table 3-2 lists common failure modes and symptoms (excluding simultaneous
multiple faults) for the monitoring and display devices in the NARKOMED 2B.
Each failure mode or symptom is keyed to a troubleshooting guide flow chart
on the following pages to assist in locating a 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 3-2: NARKOMED 2B FAILURE MODE AND SYMPTOM LIST
FAILURE MODE / SYMPTOM CORRECTIVE ACTION
Loss of O2Monitor Guide 1
Loss of Breathing Pressure Monitor Guide 2
Loss of Respiratory Volume Monitor Guide 3
No Audio Alarms Guide 4
Vitalink Failure Guide 5
Incorrect Display Guide 6
No Oxygen Ratio Monitor Alarms Guide 7
No Oxygen Supply Pressure Alarms Guide 8
Display Screens Blank Upon System Power-up Guide 9
No Keypanel Response Guide 10
Rev. A
3-3
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TROUBLESHOOTING GUIDE (continued) NM2B
GUIDE 1: Loss of O
CONNECT OXYGEN
SENSOR CABLE TO
INTERFACE PANEL
CONNECT CABLE TO
J10 ON PROCESSOR
BOARD (ALSO
CHECK CONTINUITY OF
INTERNAL CABLE)
Monitor
2
START
Y
CENTRALERT ALARM
N
IS
OXYGEN ANALYZER
FUNCTIONAL?
N
IS
"O2 SENS DISC"
DISPLAYED ON
DISPLAY?
N
IS CABLE
CONNECTED TO
J10 ON PROCESSOR
BOARD?
Y
Y
N
PERFORM A
COMPLETE PMS
ON UNIT
DOES UNIT
PASS PMS?
IS
OXYGEN ANALYZER
FUNCTIONAL?
N
REINSTALL ORIGINAL
PROCESSOR ASSEMBLY
Y
REPLACE
OXYGEN SENSOR
ASOUTLINED IN
PROCEDURE 4.30
IS
OXYGEN ANALYZER
FUNCTIONAL?
N
REINSTALL ORIGINAL
OXYGEN SENSOR
-----------------------REPLACE
PROCESSOR ASSEMBLY
AS OUTLINED IN
PROCEDURE 4.26
Y
CONTACT NAD
SERVICE DEPT.
Y
UNIT IS
FUNCTIONAL
3-4
Rev. A
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NM2B TROUBLESHOOTING GUIDE (continued)
GUIDE 2: Loss of Breathing Pressure Monitor
START
CONNECT
PILOT LINE
AT BOTH ENDS
CONNECT TUBING TO
TRANSDUCER ON
PROCESSOR BOARD
(ALSO CHECK
CONTINUITY OF
INTERNAL TUBING
CONNECTIONS)
PRESSURE MONITOR
FUNCTIONAL?
N
N
CONNECTED TO
INTERFACE PANEL AND TO
PATIENT Y-PIECE OR
PRESSURE TUBING
CONNECTED TO
TRANSDUCER ON
PROCESSOR
PROCESSOR ASSEMBLY
AS OUTLINED IN
PROCEDURE 4.26
IS
BREATHING
N
IS
PILOT LINE
ABSORBER?
Y
IS
BREATHING
BOARD?
Y
REPLACE
Y
IS
BREATHING
PRESSURE MONITOR
FUNCTIONAL?
N
REINSTALL ORIGINAL
PROCESSOR
ASSEMBLY
CONTACT NAD
SERVICE DEPT.
Y
N
PERFORM A
COMPLETE PMS
ON UNIT
DOES
UNIT PASS
PMS?
Y
UNIT IS
FUNCTIONAL
Rev. A
3-5
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TROUBLESHOOTING GUIDE (continued) NM2B
GUIDE 3: Loss of Respiratory Volume Monitor
START
CONNECT VOLUME
SENSOR CABLE TO
INTERFACE PANEL
CONNECT CABLE TO
J9 ON PROCESSOR
BOARD (ALSO
CHECK CONTINUITY OF
INTERNAL CABLE)
VOLUME MONITOR
Y
CENTRALERT ALARM
N
J9 ON PROCESSOR
VOLUME MONITOR
IS
FUNCTIONAL?
N
IS
"VOL SENS DISC"
DISPLAYED ON
DISPLAY?
N
IS CABLE
CONNECTED TO
BOARD?
Y
REPLACE
VOLUME SENSOR
ASOUTLINED IN
PROCEDURE 4.29
IS
FUNCTIONAL?
Y
N
PERFORM A
COMPLETE PMS
ON UNIT
DOES UNIT
PASS PMS?
Y
UNIT IS
FUNCTIONAL
IS
VOLUME MONITOR
FUNCTIONAL?
N
REINSTALL ORIGINAL
PROCESSOR ASSEMBLY
CONTACT NAD
SERVICE DEPT.
Y
Y
N
REINSTALL ORIGINAL
VOLUME SENSOR
-----------------------REPLACE
PROCESSOR ASSEMBLY
AS OUTLINED IN
PROCEDURE 4.26
3-6
Rev. A
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NM2B TROUBLESHOOTING GUIDE (continued)
GUIDE 4: No Audio Alarms
START
ARE
WARNINGS AND
CAUTIONS AUDIBLY
ANNUNCIATED?
N
REPLACE
PROCESSOR ASSEMBLY
AS OUTLINED IN
PROCEDURE 4.26
ARE
WARNINGS AND
CAUTIONS AUDIBLY
ANNUNCIATED?
N
REINSTALL ORIGINAL
PROCESSOR ASSEMBLY
Y
Y
N
PERFORM A
COMPLETE PMS
ON UNIT
DOES
UNIT PASS
PMS?
Y
Rev. A
CONTACT NAD
SERVICE DEPT.
3-7
UNIT IS
FUNCTIONAL
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TROUBLESHOOTING GUIDE (continued) NM2B
GUIDE 5: Vitalink Failure
START
CONNECT
PERIPHERAL CABLE
TO SERIAL
HOST FAIL TO
COMMUNICATE WITH
N
CABLE CONNECTED
TO SERIAL INTERFACE
CHECK PERIPHERAL
& HOST SERIAL
CONFIGURATION
HOST FAIL TO
COMMUNICATE WITH
DOES
PERIPHERAL
DEVICE?
Y
IS
PERIPHERAL
PORT?
Y
PORT
SETTINGS
DOES
PERIPHERAL
DEVICE?
N
N
DOES
HOST FAIL TO
COMMUNICATE WITH
PERIPHERAL
DEVICE?
N
REINSTALL ORIGINAL
PROCESSOR ASSEMBLY
Y
CONTACT NAD
SERVICE DEPT.
Y
N
PERFORM A
COMPLETE PMS
ON UNIT
DOES UNIT
PASS PMS?
Y
UNIT IS
FUNCTIONAL
REPLACE
PROCESSOR ASSEMBLY
AS OUTLINED IN
PROCEDURE 4.26
3-8
Rev. A
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NM2B TROUBLESHOOTING GUIDE (continued)
GUIDE 6: Incorrect Display
START
IS WRONG
MONITOR SCREEN
DISPLAYED?
Y
REPLACE
PROCESSOR ASSEMBLY
AS OUTLINED IN
PROCEDURE 4.26
IS WRONG
MONITOR SCREEN
DISPLAYED?
Y
N
N
PERFORM A
COMPLETE PMS
ON UNIT
Rev. A
REINSTALL ORIGINAL
PROCESSOR ASSEMBLY
CONTACT NAD
SERVICE DEPT.
3-9
N
DOES
UNIT PASS
PMS?
Y
UNIT IS
FUNCTIONAL
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TROUBLESHOOTING GUIDE (continued) NM2B
GUIDE 7: No Oxygen Ratio Monitor Alarms
START
ARE O2 / N2O
RATIO ALARMS
FUNCTIONAL?
N
IS O2 / N2O
FLOW RATIO
LED INDICATOR
FUNCTIONAL?
N
CHECK ORMC
ADJUSTMENTS
AS OUTLINED IN
PROCEDURE 5.4
IS O2 / N2O
FLOW RATIO
LED INDICATOR
FUNCTIONAL?
N
REPLACE ALARM
CHANNEL ASSEMBLY
AS OUTLINED IN
PROCEDURE 4.21
Y
Y
IS
Y
Y
"O2 / N20 LOW"
DISPLAYED ON
CENTRALERT ALARM
PANEL?
N
IS O2 / N2O
FLOW RATIO
LED INDICATOR
FUNCTIONAL?
N
REINSTALL ORIGINAL
ORMC
REPLACE
PROCESSOR ASSEMBLY
AS OUTLINED IN
PROCEDURE 4.26
ARE O2 / N2O
RATIO ALARMS
FUNCTIONAL?
N
Y
Y
COMPLETE PMS
N
FUNCTIONAL
PERFORM A
ON UNIT
DOES
UNIT PASS
PMS?
Y
UNIT IS
IS O2 / N2O
FLOW RATIO
LED INDICATOR
FUNCTIONAL?
N
REINSTALL ORIGINAL
ALARM CHANNEL
-------------------REPLACE ORMC
AS OUTLINED IN
PROCEDURE 4.10
REINSTALL ORIGINAL
PROCESSOR
ASSEMBLY
Y
CONTACT NAD
SERVICE DEPT.
3-10
Rev. A
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NM2B TROUBLESHOOTING GUIDE (continued)
GUIDE 8: No Oxygen Supply Pressure Alarms
START
ARE
OXYGEN SUPPLY
PRESSURE ALARMS
FUNCTIONAL?
N
IS O2
SUPPLY PRESSURE
LED INDICATOR
FUNCTIONAL?
N
REPLACE OXYGEN
SUPPLY PRESSURE
ALARM SWITCH
AS OUTLINED IN
PROCEDURE 4.8 OR 4.22
IS O2
SUPPLY PRESSURE
LED INDICATOR
FUNCTIONAL?
N
REINSTALL ORIGINAL
OXYGEN SUPPLY
ALARM SWITCH
--------------------
REPLACE
ALARM CHANNEL
AS OUTLINED IN
PROCEDURE 4.21 OR 4.22
Y
Y
IS
Y
Y
"LOW O2 SUPPLY"
DISPLAYED ON
CENTRALERT ALARM
PANEL?
N
IS O2
SUPPLY PRESSURE
LED INDICATOR
FUNCTIONAL?
N
REINSTALL ORIGINAL
ALARM CHANNEL
REPLACE
PROCESSOR ASSEMBLY
AS OUTLINED IN
PROCEDURE 4.26
ARE
OXYGEN SUPPLY
PRESSURE ALARMS
FUNCTIONAL?
N
REINSTALL ORIGINAL
PROCESSOR
ASSEMBLY
Y
Y
COMPLETE PMS
N
FUNCTIONAL
PERFORM A
ON UNIT
DOES
UNIT PASS
PMS?
Y
UNIT IS
Rev. A
3-11
CONTACT NAD
SERVICE DEPT.
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TROUBLESHOOTING GUIDE (continued) NM2B
GUIDE 9: Display Screens Blank Upon System Power-Up
START
CONNECT
CABLES
TO J3 & J4 ON
PROCESSOR
ARE
DISPLAY SCREENS
BLANK UPON SYSTEM
POWER-UP?
ARE
N
CABLES
CONNECTED TO J3 & J4
ON PROCESSOR
BOARD?
CHECK POWER
SUPPLY
VOLTAGES
AS OUTLINED IN
SECTION 3.1
ARE
DISPLAY SCREENS
BLANK UPON SYSTEM
POWER-UP?
N
Y
ARE
DISPLAY SCREENS
BLANK UPON SYSTEM
POWER-UP?
Y
Y
N
REINSTALL ORIGINAL
CRT ASSEMBLY
----------------------REPLACE
PROCESSOR
ASSEMBLY
AS OUTLINED IN
PROCEDURE 4.26
ARE
DISPLAY SCREENS
BLANK UPON SYSTEM
POWER-UP?
Y
N
N
PERFORM A
COMPLETE PMS
ON UNIT
N
DOES UNIT
PASS PMS?
FUNCTIONAL
Y
UNIT IS
Y
REPLACE
CRT ASSEMBLY
AS OUTLINED IN
PROCEDURE 4.27
3-12
REINSTALL ORIGINAL
PROCESSOR
ASSEMBLY
CONTACT NAD
SERVICE DEPT.
Rev. D
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