Datex-Ohmeda Giraffe Service manual

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GE Healthcare

Girae® Incubator

Service Manual

To reorder this manual, order kit:

• 6600-0847-801 (USA)

6600-0356-000 103

Page 2

All rights reserved. General Electric Company reserves the right to make changes in specications and features shown herein, or discontinue the product described at any time without notice or obligation. Contact your GE Representative for the most current information. Girae and Panda

are registered trademarks owned by Datex-Ohmeda, Inc. GE and GE Monogram are trademarks of General Electric Company. All other company and product names mentioned may be trademarks of the companies with which they are associated.

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Table of Contents

About this Manual ................................................................................................................xiii

Scope and Intended Users ...........................................................................................................................................xiii

Conventions ......................................................................................................................................................................... xiii

References ..........................................................................................................................................................................xiv

User Responsibility ...........................................................................................................................................................xiv

Important .............................................................................................................................................................................. xiv

Important Safety Information ..........................................................................................xvii

Warnings ..............................................................................................................................................................................xvii

Service Language Disclaimer .........................................................................................................................xviii

Cautions .............................................................................................................................................................................. xxv

Symbol Denitions ......................................................................................................................................................... xxvi

Chapter 1: Functional Description ...................................................................................... 1

1.1 Control Board .................................................................................................................................................................1

1.2 Relay Board ....................................................................................................................................................................3

1.3 Display Driver Board / EL Display .........................................................................................................................4

1.4 LED Board .........................................................................................................................................................................5

1.5 Power Supply .................................................................................................................................................................. 5

1.6 Peripheral Components .............................................................................................................................................5

1.7 DataLink Option ............................................................................................................................................................6

1.8 Servo Controlled Oxygen Option ...........................................................................................................................7

1.9 Humidier .........................................................................................................................................................................8

Chapter 2: Service Checkout ................................................................................................ 9

2.1 Mechanical Checks ...................................................................................................................................................... 9

2.2 Controller Checks....................................................................................................................................................... 10

2.3 Humidity Check .......................................................................................................................................................... 11

2.4 Servo Controlled Oxygen Check ......................................................................................................................... 12

2.4.1 Leak Check ..................................................................................................................................................... 12

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Table of Contents

Chapter 3: Calibration and Maintenance ........................................................................ 19

2.4.2 Pre-use Checkout ........................................................................................................................................ 12

2.4.3 Supply Valve Leak Test ............................................................................................................................. 13

2.5 Scale Check .................................................................................................................................................................. 14

2.5.1 Mechanical Check ....................................................................................................................................... 14

2.5.2 Weight Checks .............................................................................................................................................. 14

2.5.2.1 Center Weight Check .................................................................................................................... 14

2.5.2.2 O Center Weight Check ............................................................................................................. 15

2.6 Other Accessory Checks......................................................................................................................................... 15

2.7 Cable Connections and Mechanical Controls .............................................................................................. 16

3.1 Service Maintenance Schedule ........................................................................................................................... 19

3.2 Special Tools ................................................................................................................................................................ 21

3.3 System Calibration .................................................................................................................................................... 21

3.4 Line Voltage Calibration ......................................................................................................................................... 22

3.5 Humidier Calibration ............................................................................................................................................. 22

3.6 Servo Controlled Oxygen Calibration ............................................................................................................... 23

3.7 Scale Calibration ........................................................................................................................................................ 24

3.8 Leakage Current ........................................................................................................................................................ 25

3.9 Ground Resistance Check...................................................................................................................................... 25

Chapter 4: Troubleshooting ............................................................................................... 27

4.1 Startup Sequence ...................................................................................................................................................... 27

4.2 Service Screen............................................................................................................................................................. 28

4.3 Alarm Messages ......................................................................................................................................................... 32

4.3.1 “Air Probe Failure” Alarm .......................................................................................................................... 32

4.3.2 “Air Temp >38C” or “Air Temp >40C” Alarm ..................................................................................... 32

4.3.3 “Baby Hot” or “Baby Cold” Alarm ......................................................................................................... 33

4.3.4 “Baby Mode Disabled” Alarm ................................................................................................................. 33

4.3.5 “Baby Probe 1 (or 2) Failure” Alarm ..................................................................................................... 33

4.3.6 “Bad Membrane Switch” Alarm ............................................................................................................ 33

4.3.7 “Bed Heater Failure” Alarm ..................................................................................................................... 34

4.3.8 “Bed Up/Down Pedal Failure” Alarm .................................................................................................. 34

4.3.9 “Bed Up/Down Pedal Switches Disabled” Alarm .......................................................................... 35

4.3.10 “Down Pedal Pressed” Alarm .............................................................................................................. 35

4.3.11 “Fan Always in High Speed” Alarm ................................................................................................... 35

4.3.12 “Fan Failure” Alarm .................................................................................................................................. 35

4.3.13 “Humidier Failure” Alarm .................................................................................................................... 36

4.3.14 “Motor Drive Failure” Alarm ................................................................................................................. 37

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Table of Contents

4.3.15 Power Failure (LED Indicator) .............................................................................................................. 37

4.3.16 “Temperature out of Calibration” Alarm ........................................................................................ 37

4.3.17 “Up Pedal Pressed” Alarm ..................................................................................................................... 38

4.4 Error Codes ................................................................................................................................................................... 38

4.4.1 System Failure 0 ..........................................................................................................................................38

4.4.2 System Failure 1 ..........................................................................................................................................39

4.4.3 System Failure 2 ..........................................................................................................................................39

4.4.4 System Failure 3 ..........................................................................................................................................39

4.4.5 System Failure 5 ..........................................................................................................................................40

4.4.6 System Failure 6 ..........................................................................................................................................40

4.4.7 System Failure 7 ..........................................................................................................................................40

4.4.8 System Failure 8 ..........................................................................................................................................40

4.4.9 System Failure 11 ........................................................................................................................................ 41

4.4.10 System Failure 12 ..................................................................................................................................... 41

4.4.11 System Failure 13 ..................................................................................................................................... 41

4.4.12 System Failure 14 ..................................................................................................................................... 41

4.4.13 System Failure 15 .................................................................................................................................... 42

4.4.14 System Failure 16 .................................................................................................................................... 43

4.4.15 System Failure 18 ..................................................................................................................................... 43

4.4.16 System Failure 19 ..................................................................................................................................... 44

4.4.17 System Failure 20 ..................................................................................................................................... 44

4.4.18 System Failure 22 .................................................................................................................................... 44

4.4.19 System Failure 23 .................................................................................................................................... 45

4.4.20 System Failure 25 ..................................................................................................................................... 45

4.4.21 System Failure 26 ..................................................................................................................................... 46

4.4.22 System Failure 27 ..................................................................................................................................... 46

4.4.23 System Failure 28 ..................................................................................................................................... 46

4.4.24 System Failure 29 ..................................................................................................................................... 46

4.4.25 System Failure 30 ..................................................................................................................................... 47

4.4.26 System Failure 33 ..................................................................................................................................... 47

4.4.27 System Failure 34 ..................................................................................................................................... 47

4.4.28 System Failure 35 ..................................................................................................................................... 48

4.4.29 System Failure 50 ..................................................................................................................................... 48

4.4.30 System Failure 51 ..................................................................................................................................... 48

4.4.31 System Failure 52 ..................................................................................................................................... 48

4.4.32 System Failure 53 ..................................................................................................................................... 48

4.4.33 System Failure 55 ..................................................................................................................................... 49

4.4.34 System Failure 98 ..................................................................................................................................... 49

4.4.35 System Failure 99 ..................................................................................................................................... 49

4.5 Troubleshooting Symptoms ................................................................................................................................. 49

4.6 Additional Troubleshooting Tips ......................................................................................................................... 53

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Table of Contents

4.6.1 Raising and Lowering the Elevating Base ........................................................................................ 53

4.6.2 Incubator Heaters and Bed Safety Thermostat ............................................................................ 53

4.6.3 Power Supplies ............................................................................................................................................. 54

4.6.4 Switches/Thermostat ................................................................................................................................ 54

4.6.5 Humidier Heater/Safety Thermostat ............................................................................................... 55

4.6.6 Compartment Air Probe and Patient Probes .................................................................................. 55

4.6.7 Incubator Heat Sink Sensor Thermistor ............................................................................................ 56

4.6.8 Elevating Base Motor ................................................................................................................................. 56

4.6.9 Troubleshooting the 50 Pin Ribbon Cable........................................................................................ 56

4.6.10 Troubleshooting the Toroidal Transformer ...................................................................................57

4.6.11 Interpreting Serial Numbers ................................................................................................................ 57

4.7 Servo Controlled Oxygen ....................................................................................................................................... 58

4.7.1 Servo Controlled Oxygen Service Screen ......................................................................................... 58

4.7.2 Servo Controlled Oxygen Alarm Messages ..................................................................................... 59

4.7.3 Servo Controlled Oxygen Troubleshooting Tips ............................................................................ 63

4.7.3.1 Check Supply Valves ..................................................................................................................... 63

4.7.3.2 Check Calibration Valve/Calibration Fan ............................................................................. 63

4.7.3.3 Check Cooling Fan ......................................................................................................................... 63

4.7.3.4 Sensor Housing Temperature Sensor Temperature to Resistance Curve ...........64

Chapter 5: Repair Procedures ............................................................................................ 65

5.1 Hood Removal for Replacement ....................................................................................................................... 66

5.2 Porthole Door Replacement ................................................................................................................................. 67

5.3 Uprights and End Caps .......................................................................................................................................... 68

5.3.1 Re-installing the Upright .......................................................................................................................... 69

5.4 Compartment Probe Repairs .............................................................................................................................. 70

5.5 Lower Unit Repairs .................................................................................................................................................... 71

5.5.1 Removing the Chassis Cover with the Storage Drawer in Place ..........................................71

5.5.2 Incubator Fan/Motor/Optical Sensor ................................................................................................. 72

5.5.3 Incubator Heater Replacement ........................................................................................................... 73

5.5.3.1 To Remove the Heater Closest to the Foot of the Bed .................................................. 73

5.5.3.2 To Remove the Heater Closest to the Head of the Bed ................................................ 74

5.5.4 Elevating Base .............................................................................................................................................. 75

5.5.5 Chassis Replacement ................................................................................................................................ 79

5.5.6 Bed Up/Down Pedal Switch .................................................................................................................... 79

5.5.7 Humidier Assembly Repairs ................................................................................................................. 81

5.5.7.1 Tips for Repairing the Humidier Assembly on an Old Style Unit ............................81

5.5.7.2 Humidier Disassembly ............................................................................................................... 82

5.5.7.3 Humidier Reassembly ................................................................................................................ 83

5.6 Bed Tilt Brake Pad Replacement ....................................................................................................................... 85

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Table of Contents

5.7 Caster Replacement ................................................................................................................................................ 86

5.8 Controller and Display Module Procedures ................................................................................................... 87

5.8.1 Display Module ............................................................................................................................................. 87

5.8.2 Probe Panel ................................................................................................................................................... 88

5.8.2.1 Battery ................................................................................................................................................. 89

5.8.3 Controller Components ........................................................................................................................... 90

5.8.3.1 Control Board ................................................................................................................................... 91

5.8.3.2 Relay Board ....................................................................................................................................... 91

5.8.3.3 Solid State Relay .............................................................................................................................. 91

5.8.3.4 Power Supply .................................................................................................................................... 91

5.8.3.5 Toroidal Transformer .................................................................................................................... 92

5.8.3.6 Circuit Breakers, Power Switches, and Power Outlets ...................................................92

5.9 Servo Controlled Oxygen Service Procedures .............................................................................................. 93

5.9.1 Installing Oxygen Sensors ...................................................................................................................... 93

5.9.2 Replacing the Vent Screen ...................................................................................................................... 94

5.9.3 Sensor Housing Repairs ........................................................................................................................... 94

5.9.3.1 Sensor Housing Boards, Calibration Fan Assembly, and Sensor Plug Assembly 94

5.9.3.2 Calibration Valve ............................................................................................................................. 95

5.9.4 Valve Housing Repairs .............................................................................................................................. 96

5.9.4.1 Regulator Assembly ..................................................................................................................... 96

5.9.4.2 Supply Valves .................................................................................................................................. 97

5.9.5 Servo Oxygen Board Repairs ................................................................................................................. 97

Chapter 6: Illustrated Parts ................................................................................................ 99

6.1 Exploded Views ........................................................................................................................................................... 99

6.1.1 Probe Housing, Display Module, and Electrical Enclosure .....................................................100

6.1.2 Bed and Side Doors ..................................................................................................................................108

6.1.3 Hood and Compartment Air Probe ..................................................................................................114

6.1.4 Chassis ...........................................................................................................................................................116

6.1.5 Humidier .....................................................................................................................................................120

6.1.6 Elevating Base, Old Designs .................................................................................................................122

6.1.7 Elevating Base, Current Design...........................................................................................................124

6.1.8 Hood Latch, Wire Covers, and Uprights..........................................................................................126

6.1.9 Servo Control Oxygen .............................................................................................................................130

6.1.10 Accessory Hangers ................................................................................................................................137

6.1.11 Storage Drawer .......................................................................................................................................138

6.2 Accessories .................................................................................................................................................................147

6.3 Labels ............................................................................................................................................................................148

6.4 PCB Layouts ...............................................................................................................................................................152

6.5 Wiring Diagrams ......................................................................................................................................................156

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Table of Contents

Appendix A: Compartment and Skin Probe Characteristics ...................................... 167

Appendix B: Specications ............................................................................................... 169

B.1 Power Requirements..............................................................................................................................................169

B.2 Accessory Outlets ....................................................................................................................................................169

B.3 Standards ....................................................................................................................................................................169

B.4 Operating Environment ........................................................................................................................................170

B.5 Storage Conditions .................................................................................................................................................170

B.6 User Control Settings .............................................................................................................................................170

B.7 Alarms ...........................................................................................................................................................................170

B.8 Performance ..............................................................................................................................................................171

B.8.1 System ............................................................................................................................................................171

B.8.2 Humidity ........................................................................................................................................................171

B.8.3 Servo Control Oxygen .............................................................................................................................171

B.9 Weight Scale ..............................................................................................................................................................172

B.10 Mechanical Specications ................................................................................................................................172

B.10.1 Accessories................................................................................................................................................172

Appendix C: RS-232 Serial Data ....................................................................................... 173

C.1 RS-232 Connector ...................................................................................................................................................173

C.2 Data Stream .............................................................................................................................................................173

C.3 Nurse Call ....................................................................................................................................................................174

Appendix D: Additional Safety Information...................................................................177

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List of Figures

Figure 1-1 Block Diagram ................................................................................................................................................2

Figure 1-2 Humidier .........................................................................................................................................................8

Figure 2-1 Connections and Controls ...................................................................................................................... 16

Figure 3-1 Control Board Test Points ....................................................................................................................... 20

Figure 4-1 First Service Screen ................................................................................................................................... 28

Figure 4-2 Second Service Screen ............................................................................................................................ 29

Figure 4-3 Status Menu .................................................................................................................................................. 29

Figure 4-4 Switch Diagnostic Diagram ................................................................................................................... 30

Figure 4-5 First Service Screen: Diagnostics ........................................................................................................ 31

Figure 4-6 Servo Controlled Oxygen Service Screen ........................................................................................ 58

Figure 5-1 Hood ................................................................................................................................................................. 66

Figure 5-2 Uprights and End Caps ............................................................................................................................ 68

Figure 5-3 Compartment Probe ................................................................................................................................. 70

Figure 5-4 Chassis Bottom Cover .............................................................................................................................. 71

Figure 5-5 Fan Motor ....................................................................................................................................................... 72

Figure 5-6 Heat Sink and Fan ...................................................................................................................................... 73

Figure 5-7 Bed Disassembly ........................................................................................................................................ 75

Figure 5-8 Elevating Base with Two-piece Shroud Assembly ...................................................................... 76

Figure 5-9 Elevating Base with Three-piece Shroud Assembly ................................................................... 77

Figure 5-10 Humidier Parts ........................................................................................................................................ 82

Figure 5-11 Replacing the Tilt Brake ........................................................................................................................ 85

Figure 5-12 Display Module ......................................................................................................................................... 87

Figure 5-13 Probe Panel ................................................................................................................................................ 88

Figure 5-14 Electronics Enclosure ............................................................................................................................. 90

Figure 5-15 Installing Sensors ..................................................................................................................................... 93

Figure 5-16 Sensor Housing......................................................................................................................................... 94

Figure 5-17 Valve Housing............................................................................................................................................96

Figure 6-1 Probe Panel Assembly ............................................................................................................................101

Figure 6-2 Display Module .........................................................................................................................................103

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List of Figures

Figure 6-3 Electrical Enclosure .................................................................................................................................105

Figure 6-4 Humidier Transformer and RS232 Option ..................................................................................107

Figure 6-5 Bed ..................................................................................................................................................................109

Figure 6-6 Side Door (East/West) ............................................................................................................................111

Figure 6-7 Flip Door, Corner Brackets, and Grommets ..................................................................................113

Figure 6-8 Compartment Air Probe ........................................................................................................................115

Figure 6-9 Upper Chassis and Heat Sink .............................................................................................................117

Figure 6-10 Lower Chassis .........................................................................................................................................119

Figure 6-11 Humidier Assembly ............................................................................................................................121

Figure 6-12 Base and Elevating Column with Two-piece Shroud Assembly .......................................123

Figure 6-13 Base and Elevating Column with Three-piece Shroud Assembly ...................................125

Figure 6-14 Hood Latch and Wire Covers ...........................................................................................................127

Figure 6-15 Uprights and End Caps .......................................................................................................................129

Figure 6-16 Servo Control Oxygen Sensor Housing Assembly .................................................................131

Figure 6-17 Servo Control Oxygen Valve Housing .........................................................................................133

Figure 6-18 Expansion Chamber/Heatsink Vent ..............................................................................................134

Figure 6-19 Servo Control Oxygen Cooling Fan ................................................................................................135

Figure 6-20 Servo Control Oxygen PC Board .....................................................................................................136

Figure 6-21 Drainage Hangers and DIN Rail ......................................................................................................137

Figure 6-22 Storage Drawer (on Units with Two-piece Shroud Assembly) ..........................................138

Figure 6-23 Storage Drawer (on Units with Three-piece Shroud Assembly) .......................................139

Figure 6-24 Instrument Shelf (6600-0865-700) ................................................................................................139

Figure 6-25 Monitor Shelf (6600-0824-800) .......................................................................................................140

Figure 6-26 E-Cylinder Holder (6600-0836-800)...............................................................................................141

Figure 6-27 Tubing Management Arm (6600-0837-800) .............................................................................142

Figure 6-28 Dovetail Mount DIN Rail (6600-0659-803) ................................................................................143

Figure 6-29 Silo Support Assembly (6600-0853-800) ....................................................................................144

Figure 6-30 Rotating I.V. Pole Assembly (6600-0851-800) ...........................................................................145

Figure 6-31 Dovetail Extension (6600-0852-800) ...........................................................................................146

Figure 6-32 Control Board (6600-0212-850) ......................................................................................................152

Figure 6-33 Display Driver Board (6600-0215-850) ........................................................................................153

Figure 6-34 Relay Board (6600-0214-850) Revision Level 10 or Higher ................................................154

Figure 6-35 Relay Board (6600-0214-850) Revision Level 9 or Lower....................................................155

Figure 6-36 Wiring Diagram: Control Board ......................................................................................................156

Figure 6-37 Wiring Diagram: Elevating Base .....................................................................................................157

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List of Figures

Figure 6-38 Wiring Diagram: Electrical Enclosure ..........................................................................................158

Figure 6-39 Wiring Diagram: Graphics Display .................................................................................................159

Figure 6-40 Wiring Diagram: Incubator Heater, Relay Board Rev. Level 10 or Higher ...................160

Figure 6-41 Wiring Diagram: Incubator Heater, Relay Board Rev. Level 9 or Lower .......................161

Figure 6-42 Wiring Diagram: Incubator Fan and Sensor .............................................................................162

Figure 6-43 Wiring Diagram: Servo Humidier, Relay Board Rev. Level 10 or Higher .....................163

Figure 6-44 Wiring Diagram: Servo Humidier, Relay Board Rev. Level 9 or Lower ........................164

Figure 6-45 Wiring Diagram: Servo Control Oxygen ......................................................................................165

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List of Figures

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About this Manual

Scope and Intended Users

This service manual describes the service and maintenance of the Girae Incubator. The intended users for this

service manual are authorized service personnel.

Conventions

Various types of warnings, cautions, static control precautions, and information notes are used in this Service Manual to alert you to possible safety hazards and to provide you with additional information:

WARNING:

A WARNING statement is used when the possibility of injury to the patient or the operator exists.

CAUTION:

A CAUTION statement is used when the possibility of damage to the equipment exists.

SENSITIVE TO ELECTROSTATIC DISCHARGE CAUTION

An Electrostatic Discharge (ESD) Susceptibility symbol is displayed to alert service personnel that the part(s) are sensitive to electrostatic discharge and that static control procedures must be used to prevent damage to the equipment.

NOTE: A note provides additional information to clarify a point in the text.

IMPORTANT: An Important statement is similar to a note, but is used for greater emphasis.

Page 14

About this Manual

References

The following table lists the part numbers for the manual kit in each language containing the Girae Incubator Operation and Maintenance Manual and other documents pertaining to Girae Incubator:

Language Manual Kit

Czech M1141765 Danish 6600-0848-817 Dutch 6600-0848-810 English UK 6600-0848-812 English US 6600-0848-801 Estonian M1141753 French 6600-0848-802 German 6600-0848-804 Italian 6600-0848-805

Language Manual Kit

Korean M1141804 Norwegian 6600-0848-818 Polish M1141761 Romanian M1141769 Russian M1141767 Spanish 6600-0848-803 Swedish 6600-0848-806 Turkish M1141751

User Responsibility

This Product will perform in conformity with the description thereof contained in this operating manual and accompanying labels and/or inserts, when assembled, operated, maintained and repaired in accordance with the instructions provided. This Product must be checked periodically. A defective Product should not be used. Parts that are broken, missing, plainly worn, distorted or contaminated should be replaced immediately. Should such repair or replacement become necessary, GE Healthcare recommends that a telephone or written request for service advice be made to the nearest GE Healthcare Regional Service Center. This Product or any of its parts should not be repaired other than in accordance with written instructions provided by GE Healthcare and by GE Healthcare trained personnel. The Product must not be altered without GE Healthcare’s prior written approval. The user of this Product shall have the sole responsibility for any malfunction that results from improper use, faulty maintenance, improper repair, damage or alteration by anyone other than GE Healthcare..

Important

The information contained in this service manual pertains only to those models of products which are

marketed by GE Healthcare as of the eective date of this manual or the latest revision thereof. This service

manual was prepared for exclusive use by GE Healthcare service personnel in light of their training and experience as well as the availability to them of parts, proper tools and test equipment. Consequently, GE Healthcare provides this service manual to its customers purely as a business convenience and for the customer’s general information only without warranty of the results with respect to any application of such information.

Page 15

About this Manual

Furthermore, because of the wide variety of circumstances under which maintenance and repair activities

may be performed and the unique nature of each individual’s own experience, capacity, and qualications,

the fact that a customer has received such information from GE Healthcare does not imply in anyway that

GE Healthcare deems said individual to be qualied to perform any such maintenance or repair service.

Moreover, it should not be assumed that every acceptable test and safety procedure or method, precaution, tool, equipment or device is referred to within, or that abnormal or unusual circumstances, may not warrant or

suggest dierent or additional procedures or requirements.

This manual is subject to periodic review, update and revision. Customers are cautioned to obtain and consult the latest revision before undertaking any service of the equipment.

CAUTION:

Servicing of this product in accordance with this service manual should never be undertaken in the absence of proper tools, test equipment and the most recent revision to this service manual which is clearly and thoroughly understood.

Technical Competence

The procedures described in this service manual should be performed by trained and authorized personnel only. Maintenance should only be undertaken by competent individuals who have a general knowledge of and experience with devices of this nature. No repairs should ever be undertaken or attempted by anyone

not having such qualications. Genuine replacement parts manufactured or sold by GE Healthcare must be

used for all repairs. Read completely through each step in every procedure before starting the procedure; any exceptions may result in a failure to properly and safely complete the attempted procedure.

Page 16

About this Manual

Page 17

Warnings

WARNING:

Before using the Girae Incubator, read through the entire operator’s manual. As with all medical equipment, attempting to use this device without a thorough understanding of its operation may

result in patient or user injury. This device should only be operated by personnel trained in its

operation under the direction of qualied medical personnel familiar with the risks and benets of this type of device. Additional precautions specic to certain procedures are found in the text of this

manual.

WARNING:

Complete the “Pre-use Checkout“ chapter of the Operator’s manual before putting the unit into operation. If the incubator fails any portion of the checkout procedure it must be removed from use

and repaired.

Important Safety Information

WARNING:

Do not use the incubator in the presence of ammable anesthetics; an explosion hazard exists

under these conditions.

WARNING:

Always disconnect the power before performing service or maintenance procedures detailed in this manual. Apply power only if you are specically instructed to do so as part of the procedure.

WARNING:

Thoroughly air dry the incubator after cleaning it with ammable agents. Small amounts of ammable agents, such as ether, alcohol or similar cleaning solvents left in the incubator can cause a re.

WARNING:

The user or service sta should dispose all the waste properly as per federal, state, and local waste

disposal regulations. Improper disposal could result in personal injury and environmental impact.

Page 18

About this Manual

Service Language Disclaimer

ПРЕДУПРЕЖДЕНИЕ

Това упътване за работа е налично само на английски език.

(BG)

(ZH-CN)

(ZH-HK)

• Ако доставчикът на услугата на клиента изиска друг език, задължение на клиента е да осигури превод.

• Не използвайте оборудването, преди да сте се консултирали и разбрали упътването за работа.

• Неспазването на това предупреждение може да доведе до нараняване на доставчика на услугата, оператора или пациентa в резултат на токов удар, механична или друга опасност.

警告

本维修手册仅提供英文版本。

• 如果客户的维修服务人员需要非英文版本，则客户需自行提供翻译服务。

• 未详细阅读和完全理解本维修手册之前，不得进行维修。

• 忽略本警告可能对维修服务人员、操作人员或患者造成电击、机械伤害或其他形式的伤害。

警告

本服務手冊僅提供英文版本。

• 倘若客戶的服務供應商需要英文以外之服務手冊，客戶有責任提供翻譯服務。

• 除非已參閱本服務手冊及明白其內容，否則切勿嘗試維修設備。

• 不遵從本警告或會令服務供應商、網絡供應商或病人受到觸電、機械性或其他的危險。

警告

本維修手冊僅有英文版。

(ZH-TW)

• 若客戶的維修廠商需要英文版以外的語言，應由客戶自行提供翻譯服務。

• 請勿試圖維修本設備，除非您已查閱並瞭解本維修手冊。

• 若未留意本警告，可能導致維修廠商、操作員或病患因觸電、機械或其他危險而受傷。

UPOZORENJE

Ovaj servisni priručnik dostupan je na engleskom jeziku.

(HR)

• Ako davatelj usluge klijenta treba neki drugi jezik, klijent je dužan osigurati prijevod.

• Ne pokušavajte servisirati opremu ako niste u potpunosti pročitali i razumjeli ovaj servisni priručnik.

• Zanemarite li ovo upozorenje, može doći do ozljede davatelja usluge, operatera ili pacijenta uslijed strujnog udara, mehaničkih ili drugih rizika.

Page 19

VÝSTRAHA

Tento provozní návod existuje pouze v anglickém jazyce.

About this Manual

(CS)

(DA)

(NL)

• V případě, že externí služba zákazníkům potřebuje návod v jiném jazyce, je zajištění překladu do odpovídajícího jazyka úkolem zákazníka.

• Nesnažte se o údržbu tohoto zařízení, aniž byste si přečetli tento provozní návod a pochopili

jeho obsah.

• V případě nedodržování této výstrahy může dojít k poranění pracovníka prodejního servisu, obslužného personálu nebo pacientů vlivem elektrického proudu, respektive vlivem mechanických či jiných rizik.

ADVARSEL

Denne servicemanual ndes kun på engelsk.

• Hvis en kundes tekniker har brug for et andet sprog end engelsk, er det kundens ansvar at

sørge for oversættelse.

• Forsøg ikke at servicere udstyret uden at læse og forstå denne servicemanual.

• Manglende overholdelse af denne advarsel kan medføre skade på grund af elektrisk stød, mekanisk eller anden fare for teknikeren, operatøren eller patienten.

WAARSCHUWING

Deze onderhoudshandleiding is enkel in het Engels verkrijgbaar.

• Als het onderhoudspersoneel een andere taal vereist, dan is de klant verantwoordelijk voor de

vertaling ervan.

• Probeer de apparatuur niet te onderhouden alvorens deze onderhoudshandleiding werd

geraadpleegd en begrepen is.

• Indien deze waarschuwing niet wordt opgevolgd, zou het onderhoudspersoneel, de operator of een patiënt gewond kunnen raken als gevolg van een elektrische schok, mechanische of

andere gevaren.

WARNING:

This service manual is available in English only.

(EN)

• If a customer’s service provider requires a language other than English, it is the customer’s

responsibility to provide translation services.

• Do not attempt to service the equipment unless this service manual has been consulted and is understood.

• Failure to heed this warning may result in injury to the service provider, operator, or patient from electric shock, mechanical hazards, or other hazards.

Page 20

About this Manual

HOIATUS

See teenindusjuhend on saadaval ainult inglise keeles

(ET)

(FI)

(FR)

• Kui klienditeeninduse osutaja nõuab juhendit inglise keelest erinevas keeles, vastutab klient tõlketeenuse osutamise eest.

• Ärge üritage seadmeid teenindada enne eelnevalt käesoleva teenindusjuhendiga tutvumist ja

sellest aru saamist.

• Käesoleva hoiatuse eiramine võib põhjustada teenuseosutaja, operaatori või patsiendi vigastamist elektrilöögi, mehaanilise või muu ohu tagajärjel.

VAROITUS

Tämä huolto-ohje on saatavilla vain englanniksi.

• Jos asiakkaan huoltohenkilöstö vaatii muuta kuin englanninkielistä materiaalia, tarvittavan käännöksen hankkiminen on asiakkaan vastuulla.

• Älä yritä korjata laitteistoa ennen kuin olet varmasti lukenut ja ymmärtänyt tämän huolto-

ohjeen.

• Mikäli tätä varoitusta ei noudateta, seurauksena voi olla huoltohenkilöstön, laitteiston käyttäjän tai potilaan vahingoittuminen sähköiskun, mekaanisen vian tai muun vaaratilanteen vuoksi.

ATTENTION

Ce manuel d’installation et de maintenance est disponible uniquement en anglais.

• Si le technicien d’un client a besoin de ce manuel dans une langue autre que l’anglais, il

incombe au client de le faire traduire.

• Ne pas tenter d’intervenir sur les équipements tant que ce manuel d’installation et de maintenance n’a pas été consulté et compris.

• Le non-respect de cet avertissement peut entraîner chez le technicien, l’opérateur ou le patient des blessures dues à des dangers électriques, mécaniques ou autres.

WARNUNG

Diese Serviceanleitung existiert nur in englischer Sprache.

(DE)

• Falls ein fremder Kundendienst eine andere Sprache benötigt, ist es Aufgabe des Kunden für eine entsprechende Übersetzung zu sorgen.

• Versuchen Sie nicht diese Anlage zu warten, ohne diese Serviceanleitung gelesen und verstanden zu haben.

• Wird diese Warnung nicht beachtet, so kann es zu Verletzungen des Kundendiensttechnikers, des Bedieners oder des Patienten durch Stromschläge, mechanische oder sonstige Gefahren kommen.

Page 21

ΠΡΟΕΙΔΟΠΟΙΗΣΗ

Το παρόν εγχειρίδιο σέρβις διατίθεται μόνο στα αγγλικά.

About this Manual

(EL)

(HU)

(IS)

• Εάν ο τεχνικός σέρβις ενός πελάτη απαιτεί το παρόν εγχειρίδιο σε γλώσσα εκτός των αγγλικών, αποτελεί ευθύνη του πελάτη να παρέχει τις υπηρεσίες μετάφρασης.

• Μην επιχειρήσετε την εκτέλεση εργασιών σέρβις στον εξοπλισμό αν δεν έχετε συμβουλευτεί και κατανοήσει το παρόν εγχειρίδιο σέρβις.

• Αν δεν προσέξετε την προειδοποίηση αυτή, ενδέχεται να προκληθεί τραυματισμός στον τεχνικό σέρβις, στο χειριστή ή στον ασθενή από ηλεκτροπληξία, μηχανικούς ή άλλους κινδύνους.

FIGYELMEZTETÉS

Ezen karbantartási kézikönyv kizárólag angol nyelven érhető el.

• Ha a vevő szolgáltatója angoltól eltérő nyelvre tart igényt, akkor a vevő felelőssége a fordítás elkészíttetése.

• Ne próbálja elkezdeni használni a berendezést, amíg a karbantartási kézikönyvben leírtakat nem értelmezték.

• Ezen gyelmeztetés gyelmen kívül hagyása a szolgáltató, működtető vagy a beteg áramütés, mechanikai vagy egyéb veszélyhelyzet miatti sérülését eredményezheti.

AÐVÖRUN

Þessi þjónustuhandbók er aðeins fáanleg á ensku.

• Ef að þjónustuveitandi viðskiptamanns þarfnast annas tungumáls en ensku, er það skylda viðskiptamanns að skaa tungumálaþjónustu.

• Reynið ekki að afgreiða tækið nema að þessi þjónustuhandbók hefur verið skoðuð og skilin.

• Brot á sinna þessari aðvörun getur leitt til meiðsla á þjónustuveitanda, stjórnanda eða sjúklings frá raosti, vélrænu eða öðrum áhættum.

AVVERTENZA

Il presente manuale di manutenzione è disponibile soltanto in lingua inglese.

(IT)

• Se un addetto alla manutenzione richiede il manuale in una lingua diversa, il cliente è tenuto a provvedere direttamente alla traduzione.

• Procedere alla manutenzione dell’apparecchiatura solo dopo aver consultato il presente

manuale ed averne compreso il contenuto.

• Il mancato rispetto della presente avvertenza potrebbe causare lesioni all’addetto alla manutenzione, all’operatore o ai pazienti provocate da scosse elettriche, urti meccanici o altri

rischi.

Page 22

About this Manual

このサービスマニュアルには英語版しかありません。

(JA)

(KO)

(LV)

• サービスを担当される業者が英語以外の言語を要求される場合、翻訳作業はその業者の責任で行うものとさせていただきます。

• このサービスマニュアルを熟読し理解せずに、装置のサービスを行わないでください。

• この警告に従わない場合、サービスを担当される方、操作員あるいは患者さんが、感電や機械的又はその他の危険により負傷する可能性があります。

경고

본 서비스 매뉴얼은 영어로만 이용하실 수 있습니다.

• 고객의 서비스 제공자가 영어 이외의 언어를 요구할 경우, 번역 서비스를 제공하는 것은 고객의 책임입니다.

• 본 서비스 매뉴얼을 참조하여 숙지하지 않은 이상 해당 장비를 수리하려고 시도하지 마십시오.

• 본 경고 사항에 유의하지 않으면 전기 쇼크, 기계적 위험, 또는 기타 위험으로 인해 서비스 제공자, 사용자 또는 환자에게 부상을 입힐 수 있습니다.

BRĪDINĀJUMS

Šī apkopes rokasgrāmata ir pieejama tikai angļu valodā.

• Ja klienta apkopes sniedzējam nepieciešama informācija citā valodā, klienta pienākums ir nodrošināt tulkojumu.

• Neveiciet aprīkojuma apkopi bez apkopes rokasgrāmatas izlasīšanas un saprašanas.

• Šī brīdinājuma neievērošanas rezultātā var rasties elektriskās strāvas trieciena, mehānisku vai citu faktoru izraisītu traumu risks apkopes sniedzējam, operatoram vai pacientam.

ĮSPĖJIMAS

Šis eksploatavimo vadovas yra tik anglų kalba.

(LT)

• Jei kliento paslaugų tiekėjas reikalauja vadovo kita kalba – ne anglų, suteikti vertimo paslaugas privalo klientas.

• Nemėginkite atlikti įrangos techninės priežiūros, jei neperskaitėte ar nesupratote šio eksploatavimo vadovo.

• Jei nepaisysite šio įspėjimo, galimi paslaugų tiekėjo, operatoriaus ar paciento sužalojimai dėl elektros šoko, mechaninių ar kitų pavojų.

ADVARSEL

Denne servicehåndboken nnes bare på engelsk.

(NO)

• Hvis kundens serviceleverandør har bruk for et annet språk, er det kundens ansvar å sørge for

oversettelse.

• Ikke forsøk å reparere utstyret uten at denne servicehåndboken er lest og forstått.

• Manglende hensyn til denne advarselen kan føre til at serviceleverandøren, operatøren eller pasienten skades på grunn av elektrisk støt, mekaniske eller andre farer.

Page 23

OSTRZEŻENIE

Niniejszy podręcznik serwisowy dostępny jest jedynie w języku angielskim.

About this Manual

(PL)

(PT-BR)

(PT-PT)

• Jeśli serwisant klienta wymaga języka innego niż angielski, zapewnienie usługi tłumaczenia jest obowiązkiem klienta.

• Nie próbować serwisować urządzenia bez zapoznania się z niniejszym podręcznikiem serwisowym i zrozumienia go.

• Niezastosowanie się do tego ostrzeżenia może doprowadzić do obrażeń serwisanta, operatora lub pacjenta w wyniku porażenia prądem elektrycznym, zagrożenia mechanicznego bądź

innego.

AVISO

Este manual de assistência técnica encontra-se disponível unicamente em inglês.

• Se outro serviço de assistência técnica solicitar a tradução deste manual, caberá ao cliente fornecer os serviços de tradução.

• Não tente reparar o equipamento sem ter consultado e compreendido este manual de assistência técnica.

• A não observância deste aviso pode ocasionar ferimentos no técnico, operador ou paciente decorrentes de choques elétricos, mecânicos ou outros.

ATENÇÃO

Este manual de assistência técnica só se encontra disponível em inglês.

• Se qualquer outro serviço de assistência técnica solicitar este manual noutro idioma, é da responsabilidade do cliente fornecer os serviços de tradução.

• Não tente reparar o equipamento sem ter consultado e compreendido este manual de assistência técnica.

• O não cumprimento deste aviso pode colocar em perigo a segurança do técnico, do operador ou do paciente devido a choques eléctricos, mecânicos ou outros.

ATENŢIE

Acest manual de service este disponibil doar în limba engleză.

(RO)

• Dacă un furnizor de servicii pentru clienţi necesită o altă limbă decât cea engleză, este de datoria clientului să furnizeze o traducere.

• Nu încercaţi să reparaţi echipamentul decât ulterior consultării şi înţelegerii acestui manual de

service.

• Ignorarea acestui avertisment ar putea duce la rănirea depanatorului, operatorului sau pacientului în urma pericolelor de electrocutare, mecanice sau de altă natură.

Page 24

About this Manual

ОСТОРОЖНО!

Данное руководство по техническому обслуживанию представлено только на английском

(RU)

языке.

• Если сервисному персоналу клиента необходимо руководство не на английском, а на каком-то другом языке, клиенту следует самостоятельно обеспечить перевод.

• Перед техническим обслуживанием оборудования обязательно обратитесь к данному руководству и поймите изложенные в нем сведения.

• Несоблюдение требований данного предупреждения может привести к тому, что специалист по техобслуживанию, оператор или пациент получит удар электрическим током, механическую травму или другое повреждение.

UPOZORENJE

Ovo servisno uputstvo je dostupno samo na engleskom jeziku.

(SR)

(SK)

(ES)

• Ako klijentov serviser zahteva neki drugi jezik, klijent je dužan da obezbedi prevodilačke usluge.

• Ne pokušavajte da opravite uređaj ako niste pročitali i razumeli ovo servisno uputstvo.

• Zanemarivanje ovog upozorenja može dovesti do povređivanja servisera, rukovaoca ili pacijenta usled strujnog udara ili mehaničkih i drugih opasnosti.

UPOZORNENIE

Tento návod na obsluhu je k dispozícii len v angličtine.

• Ak zákazníkov poskytovateľ služieb vyžaduje iný jazyk ako angličtinu, poskytnutie prekladateľských služieb je zodpovednosťou zákazníka.

• Nepokúšajte sa o obsluhu zariadenia, kým si neprečítate návod na obluhu a neporozumiete mu.

• Zanedbanie tohto upozornenia môže spôsobiť zranenie poskytovateľa služieb, obsluhujúcej osoby alebo pacienta elektrickým prúdom, mechanické alebo iné ohrozenie.

ATENCION

Este manual de servicio sólo existe en inglés.

• Si el encargado de mantenimiento de un cliente necesita un idioma que no sea el inglés, el cliente deberá encargarse de la traducción del manual.

• No se deberá dar servicio técnico al equipo, sin haber consultado y comprendido este manual

de servicio.

• La no observancia del presente aviso puede dar lugar a que el proveedor de servicios, el operador o el paciente sufran lesiones provocadas por causas eléctricas, mecánicas o de otra naturaleza.

Page 25

VARNING

Den här servicehandboken nns bara tillgänglig på engelska.

About this Manual

(SV)

(SL)

(TR)

• Om en kunds servicetekniker har behov av ett annat språk än engelska, ansvarar kunden för att tillhandahålla översättningstjänster.

• Försök inte utföra service på utrustningen om du inte har läst och förstår den här servicehandboken.

• Om du inte tar hänsyn till den här varningen kan det resultera i skador på serviceteknikern, operatören eller patienten till följd av elektriska stötar, mekaniska faror eller andra faror.

OPOZORILO

Ta servisni priročnik je na voljo samo v angleškem jeziku.·

• Če ponudnik storitve stranke potrebuje priročnik v drugem jeziku, mora stranka zagotoviti prevod.·

• Ne poskušajte servisirati opreme, če tega priročnika niste v celoti prebrali in razumeli.·

• Če tega opozorila ne upoštevate, se lahko zaradi električnega udara, mehanskih ali drugih nevarnosti poškoduje ponudnik storitev, operater ali bolnik.

DİKKAT

Bu servis kılavuzunun sadece ingilizcesi mevcuttur.

• Eğer müşteri teknisyeni bu kılavuzu ingilizce dışında bir başka lisandan talep ederse, bunu tercüme ettirmek müşteriye düşer.

• Servis kılavuzunu okuyup anlamadan ekipmanlara müdahale etmeyiniz.

• Bu uyarıya uyulmaması, elektrik, mekanik veya diğer tehlikelerden dolayı teknisyen, operatör veya hastanın yaralanmasına yol açabilir.

Cautions

CAUTION:

Only competent individuals trained in the repair of this equipment should attempt to service it as detailed in this manual.

CAUTION:

Detailed information for more extensive repairs is included in the service manual solely for

the convenience of users having proper knowledge, tools and test equipment, and for service representatives trained by GE Healthcare.

Page 26

About this Manual

Temp alarm

Airflow curtain

Heater

Temp alarm

Airflow curtain

Fan

Heater

Temp alarm

Canopy up / down (used in conjunction with up/down arrows)

Environmental Probe

Airflow curtain

Fan

Heater

Temp alarm

Canopy up / down (used in conjunction with up/down arrows)

Environmental Probe

Scale

Airflow curtain

Fan

Heater

Temp alarm

Canopy up / down (used in conjunction with up/down arrows)

Environmental Probe

Scale

Patient O2

Airflow curtain

Fan

Heater

Temp alarm

Alarm Silence

Canopy up / down (used in conjunction with up/down arrows)

Environmental Probe

Scale

Patient O2

Airflow curtain

Fan

Heater

Temp alarm

Alarm Silence

Patient

Canopy up / down (used in conjunction with up/down arrows)

Environmental Probe

Scale

Patient O2

Airflow curtain

Fan

Heater

Temp alarm

Ground

Used on Giraffe Humidifier Reservoir

Ground Used on all electrical equipment

Symbol Denitions

This section identies the symbols that are displayed on the Girae Incubator:

Symbol Description

Consult accompanying documents.

Lower the elevating base before mounting accessories.

Temperature Alarm

Airow Curtain

Fan

Environmental Probe

Scale

Patient Oxygen

Alarm Silence

Patient

Protective Ground

Opening Girae Humidier Reservoir

Page 27

Symbol Description

Used on Giraffe Humidifier Reservoir

Max water level for humidifier

Ground Used on all electrical equipment

Used on Giraffe Humidifier Reservoir

MAX

Max water level for humidifier

Power disconnect

Ground Used on all electrical equipment

Used on Giraffe Humidifier Reservoir

MAX

Max water level for humidifier

Power disconnect

Maximum weight (of accessories on rail)

Ground Used on all electrical equipment

22 Kg

MAX.

Caution: Hot surface

Used on Giraffe Humidifier Reservoir

MAX

Max water level for humidifier

Power disconnect

Maximum weight (of accessories on rail)

Ground Used on all electrical equipment

Used on Giraffe OB heater head, humidifier

Set up screen

About this Manual

MAX

22 Kg

MAX.

Maximum Water Level for Humidier

Power Disconnect

Maximum Weight

Caution: Hot Surface

Setup Screen

Page 28

About this Manual

Page 29

Chapter 1: Functional Description

This functional description is divided into four sections representing each of the four boards. The reader should also reference the block diagram and wiring diagram when studying this section.

1.1 Control Board

The Intel 80C188EC microcontroller is an enhanced X86 processor with many on-board peripheral features, such as a interrupt controller, DMA controller, peripheral chip select driver, programmable timers, etc. The two programmable timers are used to control the bed heaters. The input to these timers is line frequency. This allows the control signal to be synchronized with the line frequency to better control the zerocrossing solid state relays. The on-board interrupt controller has several interrupts: analog-to-digital converter (ADC) conversion ready signal, overtemperature comparator output, watchdog output, power fail signal, and module interrupt signal from the system data bus. The microcontroller external bus is a multiplexed address and data bus.

The system memory consists of a programmable read-only memory (PROM) and static random access memory

(SRAM). The EEPROM is used for calibration and biomedical conguration values. This memory holds the data even after power is turned o.

The RS-485 integrated circuit converts the RS-232 TTL signals from the microcontroller to RS-485 signals for the bus. This bus is the main communications bus from the control board to the display board, scale, and servo oxygen board.

There are two isolation transceivers used to isolate the circuits powered by +5V and the circuits powered by +5VSTBY (battery backup).

The board contains a 16 channel multiplexer. There are seven temperature measurement channels. These channels measure the two patient probes and the compartment probe (with two thermistors each), and the heat sink sensor used to measure the heat sink temperature. Additional channels include the humidity sensor (RHIN), LINE COMP & LINE COMP2, 5 Volts, Motor current, Vthref, VDAC, and 1.2Vind.

Attached to the compartment probe connection is the relative humidity signal conditioning circuitry. The 1V

reference that is used for the analog circuitry is also the maximum input voltage and the oset voltage for the

ADC. This yields a purely ratiometric system.

The overtemperature circuit compares the air temperature to a reference level, generates an interrupt, and

turns o the heat if the air temperature is higher than the reference level. The overtemperature circuit requires

varying its voltage levels to accommodate various thermistor measurements. This is because the calibration is digital (no potentiometer).

Page 30

Chapter 1: Functional Description



















































Figure 1-1 Block Diagram

Page 31

Chapter 1: Functional Description

The watchdog circuitry monitors the 80C188 microprocessor, and monitors the +5V and +5VSTBY voltages. It generates the interrupt signal and power failure signal to the 80C188 microprocessors. The audio circuit includes a 8752 microcontroller that reads a wavetable located in a PROM and sends the table to a digital

audio circuit and amplier. The high priority (HP) and other alarm signal lines select an output at the correct

frequencies.

Three OR gates are combined to generate the error signal. The inputs to the circuit are overtemperature, power

failure, and system failure. This circuit generates an error signal that turns o the heater and sounds the HP

alarm. This circuit is independent of the microcontroller.

1.2 Relay Board

The Relay Board includes 2 safety relays, which close to supply mains power to the heater and motor circuits. Safety relay 1 is wired in series with the primary coil of the isolation transformer for the incubator heater. Safety

relay 2 closes the mains supply to the humidier isolation transformer and the transformer for the e-base

motor. Control signals for the two relays originate on the Control Board.

The Relay Board interfaces the DC Control signal to the chassis mounted solid-state relay (SSR), which controls the incubator heater. The Control signals for the heater SSR originates on the Control Board.

The Relay Board includes a SSR for the humidier. The SSR output is wired in series with the humidier heater. The humidier SSR control signal originates on the Control Board.

There is one current sense circuit for the incubator and an additional one for the humidier heater. These

circuits consist of a small signal transformer that produces a current proportional to the current through the

heater circuits. The current is rectied and measured. The subsequent comparator then generates a digital level based on a specied current level. This results in a signal to the Control Board representing the state of the heater (on or o).

The line compensation circuit consists of a signal transformer connected to the mains voltage. The secondary

of this transformer feeds a full wave rectier and capacitor. The resulting DC voltage is proportional to mains

voltage, and it is measured on the Control Board.

The line frequency circuit consists of a full wave rectier and a comparator. This circuit generates a digital pulse

with frequency twice that of the line frequency (50 or 60 Hz). The output signal is provide to the Control Board.

The Relay Board provides the +5v standby power supply to the entire Girae system. A +5V regulator generates

the +5V standby from the diode OR combination of the system +12V power supply or the backup battery.

If there is no mains power, then +12v is not present, and the battery will generate the +5V standby. When +12V is present, the battery is biased out of the circuit with the diode and is merely being trickle charged though a resistor. The battery charges only when the unit is powered on.

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Chapter 1: Functional Description

The motor driver circuit turns the DC motor coils in the incubator airow fan motor on and o based on feedback from the hall eect position sensors. This integrated circuit can also vary the speed and brake the

motor based on input signals from the Control Board.

The airow sensor consists of an optocoupler that outputs a clocking pulse proportional to the fan movement.

The signal is AC coupled to eliminate oset voltages and drifts. The resulting pulse is half wave rectied and

stored in a capacitor to yield a DC voltage proportional to the fan speed. If the fan stops or there is no fan, this

DC voltage becomes zero. The output signal is provide to the Control Board to indicate proper airow motor

operation.

The elevating base motor control circuits consist of a series of three relays. For the Girae Incubator, the speed

relay and the E/H select relay are always switched to the same position. The speed relay connects the 15 volt secondaries of the toroidal transformer in a series (drive at 30 volts) for raising or lowering the elevating base. The direction relay reverses the polarity of the voltage output from the speed relay depending on the direction of travel. The E/H select relay switches the output voltage from the direction relay to the elevating base motor.

The Relay Board interfaces the user and system status input switch signals to the Control Board. Switch signals

include, e-base activation, humidier reservoir, and water level status.

1.3 Display Driver Board / EL Display

The Display Driver board contains the same Intel microcontroller as the Control board. The processor on the display board is used to control the EL display contents and monitor user inputs received from the membrane switch panel and rotary encoder knob.

There are two groups of digital inputs: membrane switch panel and rotary encoder knob. The membrane switches are pulled high; pressing the switch grounds the input. The encoder also has a switch, and two optically isolated lines that pulse out of phase with each other. The number of pulses represents the number of steps the knob rotates. The phase of the pulses represents the direction of the knob rotation.

The display board system memory consists of a programmable read-only memory (PROM) and static random access memory (SRAM).

The RS-485 integrated circuit converts the RS-232 TTL signals from the microcontroller to RS-485 signals for the bus.

The timekeeping RAM has a battery integrated into the chip so that the time and date run are kept current

even with the power o. The battery has a minimum life of 10 years. Operator conguration values, patient

information (trending), and the error log are stored in this RAM.

The graphics controller is an S-MOS VGA controller. The graphics controller interfaces the data from the video RAM to the EL display. The controller also synchronizes the display using a horizontal pulse (LP) and a vertical

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Chapter 1: Functional Description

pulse for the whole display frame (YD). The controller handshakes with the 80C188 using the READY line to eliminate any lost data during display refreshes.

1.4 LED Board

The LED Board contains ve display banks and two display drivers. One of the display drivers controls the

patient temperature and air temperature display banks. The other driver controls the patient set temperature, air set temperature, warmer bar graph, and the mode and override indicators.

This allows the two large displays (patient and air temperature) to be multiplexed at a slower rate than the other LEDs. This results in brighter large displays. Each driver has a brightness potentiometer that is preset at

the factory and should not be adjusted in the eld.

1.5 Power Supply

The universal input switching power supply converts the line voltage to +5V DC and +12V DC. This supply can source up to 75 watts. The 5 volts powers the electronics and the 12 volts is used by the EL display and for future boards. Acceptable voltage ranges are 4.75V - 5.25V and 10.8V - 13.2V.

1.6 Peripheral Components

For the heater isolation transformer with relay board revision 9 or lower, the heater isolation transformer isolates the incubator heaters from the mains voltage. The primaries mains input voltage comes from the relay board and is switched by safety relay 1 and is also routed through the heater current sense circuit. The dual primaries are connected in parallel for 115 volt operation and in series for 230 volt operation. The isolated secondary output voltage is always 115 volts and goes directly to the solid state relays and the incubator heaters

For the heater isolation transformer with relay board revision 10 or higher, the heater isolation transformer isolates the incubator heaters from the mains voltage. The primaries mains input voltage comes from the relay board and is switched by safety relay 1. The dual primaries are connected in parallel for 115 volt operation and in series for 230 volt operation. The isolated secondary output voltage is always 115 volts and is input to the relay board where it is used by the heater current sense circuit. It then outputs from the relay board to the solid state relays and the incubator heaters

The humidier isolation transformer isolates the humidier heater from the mains voltage. The primaries

mains input comes from the relay board and is switched by safety relay 2. The dual primaries and secondaries are connected in parallel for 115 volt operation and in series for 230 volt operation. The isolated secondaries output voltage is equal to the mains input voltage..

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Chapter 1: Functional Description

The toroidal transformer is used to buck the mains voltage down to the range required for the elevating base motor. The primaries mains input comes from the relay board and is switched by safety relay 2. The dual primaries are connected in parallel for 115 volt operation and in series for 230 volt operation. The output voltage from each secondary is about 15 volts for both 115 and 230 volt operation and is input to the relay board motor control circuits.

The solid state relay (SSR) is used to switch the isolated 115 volts to the incubator heaters. The SSR is mounted to the back wall of the electronics enclosure below the toroidal transformer.

The 8.4 NiMH battery is connected to the relay board. It is used to power the +5 STBY during power fail. The battery charges only when the unit is powered on.

1.7 DataLink Option

The DataLink option allows direct output of serial data to various remote monitoring systems, such as a computer or commercial RS-232 monitor. The DataLink option board contains the electronic circuitry necessary

to provide a 2500 VRMS isolated serial interface to meet the logic levels specied by EIA RS-232D and

CCITTV.28.

The MAX250 and MAX251 (U1 and U2), together with two 6N136 optocouplers and transformer TR1, form an isolated RS-232 transmitter and receiver. The MAX250 connects to the non-isolated or “logic” side of the interface, translating logic signals to and from the optocouplers, while the MAX251 resides on the isolated or “cable” side, translating data between the optocouplers and RS-232 line drivers and receivers. In addition to the optocoupler drivers and receivers, the MAX250 also contains isolation transformer drive circuitry which supplies power to the isolated side of the interface, and the MAX251.

The transmit signal is input to the MAX250 driver (U1 pin 4) whose output (U1 pin 3) drives optocoupler U4.

The optocoupler output (U4 pin 6) is then fed into the MAX251 driver (U2 pin 3). The output of the MAX251 driver (U2 pin 12) is at the logic levels conforming to EIA RS-232D and CCITTV.28. Conversely, the receive signal enters the MAX251 driver (U2 pin 10) and is stepped down to CMOS/TTL levels at U2 pin 5. This logic level drives optoisolator input (U3 pin 3) whose output is fed into U1 pin 10. The output (U1 pin 9) signal is then available to the control printed circuit board.

A slide switch SW1 is used as a “self test” for the RS-232 interface. In the closed position, the J30-1 transmit signal is sent through the MAX250/MAX251 transmitter and back into the receiver portions. The signal can be

read at J30-2 and veried to be correct. Any external cable connection must be removed for this self test to

function. CR1 and CR2 provide transient protection for MAX251. In normal operation SW1 should be in the open (OFF) position.

The nurse call signal is input at J30-5 as a TTL logic level. In the “no alarm” state, this signal is a logic high, which turns on Darlington Q1, energizing relay K1. This results in contact closure between J31-1 and J31-2.

In the “alarm” state, J30-5 is a logic low, which turns o Q1, de-energizes K1 and results in contact closure

between J31-2 and J31-3. K1 provides 2500 VRMS isolation between the relay coil inputs and contact outputs.

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Chapter 1: Functional Description

1.8 Servo Controlled Oxygen Option

The Girae Servo Control Oxygen System consists of an oxygen sensing circuit, Servo Oxygen circuit board, and

an oxygen delivery system.

The sensing circuit is located beneath the bed and consists of a pair of fuel cell oxygen sensors, a three-way solenoid calibration valve, and a calibration fan. In normal operation the calibration valve is closed and allows

the Girae fan to circulate gas from the infant compartment across the sensors.

The unit must be calibrated at least every 24 hours when servo oxygen is in use. After 24 hours have elapsed the system prompts the user to perform calibration. Once the operator initiates calibration, the calibration valve opens and the calibration fan is turned on. This draws ambient air across the sensors until a stable reading is obtained. This 21% oxygen reference value is then used to calibrate the measuring algorithm. After

calibration 100% oxygen is briey delivered to the system to ensure there are no occlusions. When calibration

is complete the unit will resume controlling oxygen based on the last set point.

The system must have two sensors present to operate. One sensor is always used for control and the other is used for a redundant check and display. The sensors generate a voltage of about 40 millivolts at 21% oxygen concentration and about 200 millivolts at 100% oxygen concentration. The voltage is directly proportional to the concentration of oxygen. Humidity and temperature sensors located in the sensor plug are used for voltage compensation. A fan mounted to the sensor-housing door is activated when the temperature reaches 50 degrees C. This fan circulates air to keep the sensors below the maximum allowable operating temperature, about 55 degrees C.

The Servo O2 board is located in the Girae controller. The microcontroller and integrated EPROM on the board

perform the following:

• Convert sensor output from analog to digital

• Activates oxygen alarm conditions.

• Two-way communications via 485 bus with the Girae control board.

• Controls the calibration valve to select calibration mode.

• Controls the two supply valves to maintain the desired oxygen set point.

• Opens the safety relay, which removes power to the two-way valve and the supply valves in case of a

system failure.

The oxygen delivery system consists of two solenoid supply valves, and a regulator assembly. The preset regulator regulates the oxygen supply to 50 psi (345 kPa). Two supply valves, controlled by the Servo Oxygen

board, control ow to the infant compartment. Both valves are opened until the measured level gets close to the desired set point then one valve is closed. One valve is then cycled on and o as needed to maintain the

desired oxygen levels in the infant compartment. The valve selected is alternated so both valves cycle about the same number of times. There are 2 fuses between the Servo O2 board and the supply valves that prevent high current from the board entering the valve housing should a short occur in the supply valves.

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Chapter 1: Functional Description

1.9 Humidier

Refer to the following diagram. Water enters the insulating cylinder (1) through a small hole in bottom. Steam rises along the heater cartridge protective insert (2) and is channeled between the heater mount (3) and the ramp block (4) and out the steam port (5).

Figure 1-2 Humidier

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Chapter 2: Service Checkout

WARNING:

Do not perform the preoperative checkout procedure while the patient occupies the unit.

WARNING:

Complete the procedures in this chapter before putting the unit into operation. If the equipment fails any portion of the checkout procedure it must be removed from use and repaired.

2.1 Mechanical Checks

1. Disconnect the power cord for the mechanical portion of the preoperative checkout procedure.

2. Examine the power cord for any signs of damage. Replace the cord if damage is evident.

3. Check that both plug retaining brackets are in place.

4. Examine the unit overall for any damaged or missing parts. Examine the unit for any missing or damaged labels.

5. Check that all the casters are in rm contact with the oor and that the unit is stable. Lock the caster brakes and check that they hold the unit in place. Release the brakes and check that the unit moves smoothly.

6. Check the operation of the side doors. Open the doors and check that they swing all the way down and hang perpendicular to the bed. Check that the doors are securely attached to the unit and that the hinge pins are properly seated. Check that the inner walls are securely fastened to the doors. Close the doors and check that the latches hold the doors securely shut. The orange latch open indicators should not be visible when the latches are engaged. Check that the hood is in the locked position.

7. Check the tubing access door at the top of the ventilator slot in the back wall. It should ip up easily and smoothly, and stay in position anywhere on its travel path.

8. Check the portholes. Open the portholes by pressing on the latch. The cover should swing open. Close the porthole and check that the latch holds the cover securely shut and that the cover seals tightly against the porthole gasket. Check that all the porthole seals are in place and are in good condition.

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Chapter 2: Service Checkout

9. If the unit is equipped with an iris porthole, check the iris is installed and in good condition. Check that the iris tightens when it is rotated.

10. Check that the tubing access covers in the four bed corners and the large slot grommet at the head of the bed are in place and are in good condition.

11. Check the operation of the bed. The bed should rotate easily without binding. If the bed is properly seated and locked in place, the mattress should be level. With the bed rotated back into the straight position, check to see that the bed platform extends and stops when it is pulled out on either side. Check the operation of the bed tilt mechanism. Squeeze the tilt control and push down on the foot of the bed. The head of the bed should raise easily, and should stay in position at any angle along its tilt path when the tilt control is released. Push down on the head of the bed. The foot of the bed should raise easily, and should stay in position at any angle along its tilt path when you the tilt control is released.

12. Check the operation of the hood lock. Release the lock and raise the hood. Make sure it locks in the open position. Release the lock and lower the hood. Make sure it locks in the closed position.

2.2 Controller Checks

WARNING:

Do not use the Incubator in the presence of ammable anesthetics: an explosion hazard exists

under these conditions.

1. Connect the incubator power cord to a properly rated outlet.

2. Connect the patient probe to jack 1 on the probe panel.

3. Switch on the power at the mains switch on the back of the unit, and at the standby switch on the probe panel, while holding in the override button (>37) on the display during power up until the software revision

screen appears. Release the button and the rst service screen will appear.

4. Scroll to “Down” and select it to bring up the second service screen. Select Status to see Status screen.

Check status of the software self tests. These include: heater on (INCHTRON), heater o (IHTROFF), humidier heater on (RHHTR), remote monitoring data stream (RS232LOOP), incubator fan on (FANON), and incubator fan o (FANOFF). All test should say PASS except RS232 LOOP. If the RS232 option is not installed RS232LOOP will display N/A. To test the circuit if the option is installed, short pins 2 and 3 on the 9 pin

connector on the back of the electrical enclosure.

5. Using the standby switch turn o the unit, then turn it back on. Verify the following:

• All the displays and indicators light

• The software revision appears

• The prompt tone begins

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Chapter 2: Service Checkout

NOTE: If the unit has been used in the last 2 hours, the patient history query appears.

6. Adjust the set temperature to silence the prompt tone.

7. Check the patient probe. If the probe is below 30 C, the display will show -L-. Warm it by placing it between

your ngers, and verify that the baby temperature reading increases.

8. Unplug the patient probe and check that both visual and audio alarms trigger in the Baby control mode.

9. If so equipped, check the operation of the bed elevating system. Raise and lower the bed along its entire travel range, checking that the mechanism operates smoothly. Check that the pedals on both sides of the unit raise and lower the bed.

10. Check the power failure alarm and the battery backed up memory. Make note of the current control mode and temperature settings and wait one minute, then unplug the Incubator from the wall outlet. An alarm should sound and the power failure indicator should light. Wait one to two minutes and plug the Incubator

back in. Verify that the alarm cancels and that the Incubator returns to the same control mode and

temperature settings it displayed before the power interruption.

NOTE: A fully charged battery should supply the power failure alarm for 10 minutes minimum (IEC 606012-19 clause 101.3). If the alarm is tested for the full 10 minutes, the Incubator must be run at least two hours to recharge the battery before it is used with a patient. Total recharge time is 10 hours. The battery charges only when the unit is powered on.

11. Perform the Leakage Current and Ground Resistance checks in sections 3.8 and 3.9.

2.3 Humidity Check

Turn on the Girae unit and verify that the Servo Humidity icon is on the screen. Set the Humidity to 65%. Wait for 4 minutes. If no alarms are seen (except for a possible “Add Water” message) the humidier is operational.

NOTE: It is not necessary to have water in the reservoir to perform this test.

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Chapter 2: Service Checkout

2.4 Servo Controlled Oxygen Check

2.4.1 Leak Check

This test checks for leaks between the O2 sensors and the Heat sink vent tting.

1. Remove translation deck, tilt platform, upper pan, and fan.

2. Cover the heat sink vent near the fan shaft with adhesive tape. Make sure the tape will not interfere with fan rotation. Reinstall the fan, upper pan, tilt platform, and translation deck.

NOTE: If the conical shaped rubber grommet was removed with the fan, when reinstalling fan be sure that rubber grommet clicks into groove on fan shaft.

3. Power up the unit, hold down the ‘Air curtain’ button and press the ‘Down’ button to force the Girae into low fan speed.

4. Set O2 set point to 21%; the display will show the actual concentration in the larger numerals next to the

set point. Open the doors until the actual concentration reaches 21% (ambient).

5. Run the Servo O2 calibration routine and wait for the calibration complete message. In approximately 20 seconds, the “Check O2 Supply” alarm should sound. If there is no alarm, the tubing between the sensor

housing and the heat sink vent tting has a leak or is disconnected. Repair the leak and repeat steps 1

through 4 of this procedure.

6. After performing the test, power o the unit. Remove the translation deck, tilt platform, upper pan, and the fan, and remove the adhesive tape. Be sure to remove any residue on the heat sink left by the tape.

7. Reassemble the system and run the calibration routine one nal time.

2.4.2 Pre-use Checkout

This test checks for leaks between the chassis vent tting and the O2 sensors.

1. Connect an acceptable hose from an oxygen supply to the oxygen inlet tting on the unit. Supply pressure should be between 310 kPa (45 PSI) and 586 kPa (85PSI).

2. Power up the unit.

3. Set the Air Control set point to the desired temperature.

4. Wait for the air temperature to stabilize. This could take about 45 minutes, depending on your circumstances.

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Chapter 2: Service Checkout

5. Hold down the ‘Boost Air Curtain’ button and press the ‘Decrease Temperature’ button to force the unit into low fan speed (Whisper Quiet Mode).

6. Wait 10 minutes to ensure stability of the Whisper Quiet Mode.

7. Select wrench icon on display screen to bring up setup menu. Select Cal Oxygen on the setup menu to initiate calibration.

8. When calibration is completed, 100% oxygen is delivered for approximately 20 seconds to ensure there

are no occlusions in the system. Do not turn o the unit or disconnect the oxygen supply during this brief

period after the ‘Calibration Complete’ screen appears. Exit calibration screen.

9. Select O2 icon on display screen to bring up Servo Control Oxygen menu. Set O2 set point to 65%.

10. Start timer and verify that unit reaches 60% in less than 10 minutes.

NOTE: If rise time is longer than 10 minutes check all tubing between the O2 sensors and the chassis vent

tting. The chassis vent may be identied by its mushroom cap shaped cover.

NOTE: Unit should not be placed in service unless the calibration is successful and the rise time test passes.

NOTE: The Low O2 alarm may activate during the rise time test. Silence the alarm and let the test continue.

NOTE: The “O2 Cal Lost – No O2” alarm may appear after the unit is turned on or returned from power fail

condition. If this alarm appears, calibrate the oxygen sensors (using the wrench icon and the Cal Oxygen option) and resume use. If this alarm appears during normal operation, calibrate and continue use, but call service.

2.4.3 Supply Valve Leak Test

1. Connect oxygen supply to Servo Oxygen tting.

2. Disconnect the 10mm hose from the expansion chamber.

3. Power up unit in Service Mode.

4. Scroll to Servo Oxygen service screen, and open V1 & V2 and verify that gas ows audibly .

5. Close V1 & V2 and place the 10mm hose in a cup of water. Verify that no more than 10 bubbles appear over a one minute period. If unit fails, replace supply valves.

When test is completed, reattach 10 mm hose to expansion chamber.

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Chapter 2: Service Checkout

2.5 Scale Check

The scale can be calibrated or checked using a Class F calibration weight between 1 kilogram and 8 kilograms (accuracy of 0.01%). (This class F Weight is available as part number 6600-0209-800.)

NOTE: For EU Member States:

• This scale has been designed and manufactured in accordance with the non-automatic weighing instruments (NAWI) directive, 90/384/EEC. In order to assure complete compliance to the Directive, have

the unit calibrated by an accredited local test authority. If you are unable to identify a test authority, please

contact your GE representative or distributor for assistance.

• Periodic re-verication (calibration) of the scale must be performed in accordance of the National Regulations Governing Legal Metrology. The required re-verication frequency will vary by country. Contact

your local weights and measures authority for more information.

2.5.1 Mechanical Check

1. Examine the scale connector cord for damage.

2. Examine the LEMO connector to make sure it is tightly assembled.

3. Check for bent pins.

4. Examine the scale for obvious signs of damage.

5. If any of the parts are damaged replace them.

2.5.2 Weight Checks

IMPORTANT: If the scale fails the weight checks, calibrate it according to the procedure in section 3.7 and then

perform the weight checks again.

2.5.2.1 Center Weight Check

1. Enter the service screen by holding the override key (>37) while powering up. Set the scale resolution to 5 grams (if option is available).

2. Shut o the unit and power it back up to enter normal weighing mode.

3. Place a known weight in the center of the mattress and perform a weigh cycle. The displayed weight should

be the known weight +/- 10 grams.

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Chapter 2: Service Checkout

2.5.2.2 O Center Weight Check

1. Enter the service screen by holding the override key (>37) while powering up. Set the scale resolution to 5 grams (if option is available).

2. Shut o the unit and power it back up to enter normal weighing mode.

3. Place a known test weight 10 cm (4”) from the center of the mattress in 4 positions 90 degrees from each other (for example- toward each corner of the mattress) and check the reading at each position. Resulting

weight readings should be within +/- 10 g of previously obtained center weight reading.

2.6 Other Accessory Checks

1. Check that all accessories are securely mounted and out of the path of the hood in the open position.

2. Check the operation of any accessories with reference to their appropriate operation manuals.

3. Setup any required suction or gas supply systems. Check them for leaks as described in their respective operation manuals.

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Chapter 2: Service Checkout

2.7 Cable Connections and Mechanical Controls

Numeric Temperature Displays

Graphics Screen

Temperature Regulation Controls

Tubing Grommets

Control Knob

Hood

Compartment Probe

Side Door Latch

Tubing access door

Ventilator Slot

Side Door Latch

Standby Power Switch (I/O)

Drainage Hanger

Caster Brake

FRONT

Tubing Grommets

Probe Jacks

Humidier Reservoir (air intake lter located

behind reservoir)

Accessory Power Outlets

Figure 2-1 Connections and Controls

BACK

RS 232 Connector

Controller Cover

Mains Power Switch

Power Cord Inlet

Page 45

Hood

Chapter 2: Service Checkout

Control Panel

Portholes

Upright

Side Door Latch

Drainage Hanger

Storage Drawer

SIDE

Dovetail rail

Hood latch

Pleural Drainage Hanger

Elevating Column

Bed Height Pedal

Page 46

Chapter 2: Service Checkout

Page 47

Chapter 3: Calibration and Maintenance

SENSITIVE TO ELECTROSTATIC DISCHARGE CAUTION

WARNING:

After performing any repair or calibration, always perform the Service Checkout Procedure before putting the unit back into service.

3.1 Service Maintenance Schedule

The unit should be maintained in accordance with the procedures detailed in this manual. Service maintenance must be performed by a technically competent individual.

This schedule lists the minimum frequencies. Always follow hospital and local regulations for required frequencies.

Frequency Maintenance

• Perform the electrical safety and calibration procedure as described later in this

Annually

Every Two Years

Every Three Years

chapter.

• Perform checkout procedures in Chapter 2. If the scales fail the weight check, perform

the Scale Calibration procedure in section 3.7.

• Replace the battery. NOTE: The battery is used to sound the power failure alarm and to power memory circuits

during a power failure. Run the unit for at least two hours to charge the new battery before using the unit. The battery charges only when the unit is powered on.

Calibratethehumidier.

Page 48

NORMAL MODE CAL MODE

Chapter 3: Calibration and Maintenance

Calibration jumper

Test Point 1

Test Point 2

Figure 3-1 Control Board Test Points

Page 49

Chapter 3: Calibration and Maintenance

3.2 Special Tools

The following tools (or their functional equivalents) are required to complete the recommended service procedures:

• Digital Multimeter, 4-1/2 digit

• PLCC Extractor for removing socketed chips

• Leakage Current Tester

• Static Control Work Station (recommended)

• Light gray touch-up paint (Munsell .16GY8.56-0.44 chroma)-18ml .......................................... 6600-0714-200

• Servo Humidity Calibration Kit .................................................................................................................... 6600-0048-850

• 5 kilogram (5000 gram) Class F test weight* ........................................................................................ 6600-0209-800

*The scale can be calibrated using a Class F calibration weight between 1 kilogram and 8 kilograms (accuracy of 0.01%).

NOTE: Do not use simulator 6600-0876-700 for validation testing.

3.3 System Calibration

NOTE: If Only performing line voltage calibration, follow instructions in next section, 3.4.

IMPORTANT: Be sure to perform System Calibration after replacing a control board.

1. Turnpowero.

2. Remove electrical enclosure back panel.

3. Unplug the temperature sensors from J1, J4 and J2 on the control board.

4. Move jumper JP1 to the CAL MODE position on the control board. (Refer to “Figure 3-1 Control Board Test Points” on page 20.) Be sure to orient the jumper correctly so pins 5-6 and 7-8 are shorted.

5. Turn power on. After running the power-up testing INITIALIZING will be displayed and dots will move across the top of the screen.

6. After about 90 seconds CALIBRATION MODE, Enter “VREF”, and Enter “Mains” will be displayed.

7. Using a 4 ½ digit DVM (capable of measuring to 0.1 millivolt) measure VREF at TP1, pins 1 and 6 (pin 6 is ground) on the control board. Measure to the nearest 0.1 millivolt. (Typical voltage reading will be 1.2350)

8. Dial in VREF using the control knob. Press the knob to enter the value.

9. Measure the Mains Voltage at the AC connectors at the bottom of the electronics enclosure cover.

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Chapter 3: Calibration and Maintenance

10. Dial in the Mains voltage using the control knob. Press the knob to enter the value.

11. After a few seconds the dots will stop moving across the screen and DONE will appear on the top right of

thedisplay.DonotshutotheunituntiltheDONEmessageisdisplayedorthenewcalibrationvalueswill

not be stored.

If the message “Mains voltage calibration failed. Please enter the mains voltage again” appears this

indicatesthedialedinlinevoltageis20%dierentthanthemeasuredvalue(notthenominalvalue).

12. Power down the unit and move the calibrate jumper to the NORMAL MODE position. Be sure to orient the jumper correctly so pins 1-2 and 3-4 are shorted.

System and line voltage calibration are complete.

13. Proceedtohumidiercalibration.

3.4 Line Voltage Calibration

IMPORTANT: Be sure to perform line voltage calibration after replacing a relay board.

1. Hold the override button (>37) while powering up the unit to enter the service screen.

2. On the second service screen select CAL LV.

3. Measure the line voltage at the AC connectors located at the bottom of the electrical enclosure.

4. On the CAL LV screen, dial in the mains voltage value that you measured and push the knob to enter it.

5. When calibration is completed screen will say Mains Voltage Calibration Complete.

If the message “Mains voltage calibration failed. Please enter the mains voltage again” appears this indicates

thedialedinlinevoltageis20%dierentthanthemeasuredvalue(notthenominalvalue).

3.5 Humidier Calibration

IMPORTANT: Besuretore-calibratethehumidierwhenevereitherthesensororthecontrolboardisreplaced.

IMPORTANT: In order for the water in the calibration bottle to be completely saturated, most of the salt should

not be dissolved. There should be as little standing water above the salt line as possible to minimize the response time. The salt in the calibration bottle may only be used for a period of one year after its initial mix with water then the kit should be discarded.

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Chapter 3: Calibration and Maintenance

1. Takethecapothehumiditycalibrationbottleandaddonehalfcapfullofsteriledistilledwatertothe

bottle. Shake the bottle to thoroughly mix the salt and water solution. Place the elbow on the bottle. The smaller end goes over the bottle.

2. Slide the elbow over the humidity sensor (mounted on the back wall) until it stops.

3. Hold the override key while powering up to enter the service screen.

4. On the second service screen, select Cal RH. The screen will prompt “Push knob when RH reading is stable.” Wait for 20 minutes or until the RH display stabilizes (does not change by more than 1% in 5 minutes).

5. You have the option to select STABLE, SET TO DEFAULT or EXIT. STABLE initiates calibration. SET TO DEFAULT resets calibration values back to factory default settings. If you started calibration by mistake (without the calibration bottle in place, for example) you would select SET TO DEFAULT and then calibrate the unit. If you have entered the calibration routine by mistake, select EXIT to leave without initiating calibration

6. If “RH Sensor Calibration Completed” is displayed, the calibration is complete. Depress the knob to exit the Cal RH routine.

7. If “RH Sensor Calibration Failed Try Again” is displayed, verify your setup and press the knob to try the calibration again.

3.6 Servo Controlled Oxygen Calibration

1. Select Set Up icon (wrench) to bring up Set Up screen.

2. Scroll down and select Cal Oxygen to initiate calibration. Calibration is automatic and takes less than

veminutes.Abargraphindicatesprogresstowardcompletingcalibration.Ifforanyreasonyouwishto

discontinue calibration before it is completed, turning the control knob in either direction will cause the word Cancel to appear on the calibration screen. Pushing in the control knob will discontinue calibration.

When calibration is completed, 100% oxygen is delivered for approximately 20 seconds to ensure there are no

occlusionsinthesystem.Donotturnotheunitordisconnecttheoxygensupplyduringthisbriefperiodafter

the ‘Calibration Complete’ screen appears.

NOTE: The servo control oxygen system prompts for calibration every 24 hours, but the system may prompt for calibration if there is a large leak in the system (for example if a door is open) for half an hour.

CAUTION:

The servo-control system must be calibrated at the same atmospheric pressure in which it is to be used. Operation at atmospheric pressures other than that present during calibration may result in readings outside the stated accuracy for the unit.

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Chapter 3: Calibration and Maintenance

3.7 Scale Calibration

NOTE: For EU Member States:

• This scale has been designed and manufactured in accordance with the non-automatic weighing

instruments (NAWI) directive, 90/384/EEC. In order to assure complete compliance to the Directive, have the unit calibrated by an accredited local test authority. If you are unable to identify a test authority, please contact your GE representative or distributor for assistance.

• Periodicre-verication(calibration)ofthescalemustbeperformedinaccordanceoftheNational RegulationsGoverningLegalMetrology.Therequiredre-vericationfrequencywillvarybycountry.Contact

your local weights and measures authority for more information.

NOTE: The scale is calibrated using a Class F calibration weight between 1 kilogram and 8 kilograms (accuracy of 0.01%).

1. Place the test weight on the center of the bed.

2. Hold the override key (>37) while powering up to enter the service screen.

3. On the second service screen, select Cal Scale.

4. Remove the weight and push the knob at the screen prompt “REMOVE THE WEIGHT AND PUSH KNOB”. The screen will prompt “INITIALIZING” for a few seconds.

5. Replace the weight and push the knob at the screen prompt “PLACE TEST WEIGHT AND PUSH KNOB”. The screen will prompt “MEASURING” for a few seconds.

6. When the screen prompts “ENTER TEST WEIGHT” Dial in the test weight to the nearest gram. Press the knob to enter. The screen will prompt “CALCULATING” for a few seconds.

7. When the screen prompts:

SAVE AND EXIT

EXIT ONLY

RESTORE DEFAULT

Select and enter “SAVE AND EXIT”

Turnothepowertoexittheservicemode.

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Chapter 3: Calibration and Maintenance

3.8 Leakage Current

Use approved equipment and techniques to test the unit’s leakage current and ground continuity. Follow the directions supplied by the test equipment manufacturer to verify the following:

1. Less than 300 microamperes measured at any exposed metal surface for equipment rated at 120 VAC, 50/60 Hz.

2. Less than 500 microamperes measured at any exposed metal surface for equipment rated at 220 VAC, 50/60 Hz or 240 VAC, 50/60 Hz.

3.9 Ground Resistance Check

Use a electrical safety analyzer to measure the resistance between the ground pin on the line cord plug and exposed metal of the electronic enclosure. The ground resistance must be less than 0.2 ohms.

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Chapter 3: Calibration and Maintenance

Page 55

Chapter 4: Troubleshooting

4.1 Startup Sequence

By default, the Girae Incubator starts up in user mode. The next section describes how to start up the Incubator in service mode. The following table describes the Girae Incubator startup sequence for each mode:

User Mode Service Mode

1. The alarm light turns on and remains on.

2. All LEDs and segments light up and the EL screen is yellow.

3. All LEDs turn o. The EL screen displays the Girae logo.

4. The alarm light turns o. Software revisions appear on the EL screen with OKs.

5. The user screen appears.

2. All LEDs and segments light up and the EL screen is yellow.

3. All LEDs turn o. The EL screen displays the Girae logo.

4. The alarm light turns o. Software revisions appear on the EL screen without OKs.

5. The service screen appears.

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Chapter 4: Troubleshooting

4.2 Service Screen

To access the service screen, hold in the override button (>37) during power up until the software revision screen appears. Release the button and the rst service screen will appear.

Figure 4-1 First Service Screen

Default options that may be selected from this screen appear along the left side of the screen.

Item Description

Digital/Analog Converter voltage. This is the over temperature voltage that is used by the system

DAC Volt

Language

Temp U

Volume Select one of four volume settings; 1 is minimum, 4 is maximum.

Pat Alarm

Elevate Disable or enable the bed up/down pedal switches.

Pat Ctrl Allows you to disable patient control. Pat Algo To be used for future software options.

Scale U

Scale R Select from 2 scale resolution settings; 10 grams or 5 grams (10 grams is the factory default).

to verify the computer independent circuitry is working. To manually test this circuit enter voltages from 0 to .5 V. The DV value at the bottom right corner of the screen should match this value within 10mV.

English is the default language that appears on the EL display, but you can select French, Spanish, etc., depending on what software is installed.

Changes temperature displays to show “Fahrenheit”, “Celsius” or “Celsius Only” so the Fahrenheit option is not present on the user Set-up screen (Celsius is factory set default).

Set the default Hot Baby/Cold Baby alarm to activate when either 0.5ºC or 1.0ºC dierence is read between a set temperature and the baby probe temperature.

Select from “Grams”, “Pounds” or “Grams Only” so that the pounds option is not present on the user Scale screen (grams is the factory default).

Page 57

Item Description

Comfort Allows you to remove the Comfort Screen feature.

Set Time

View Mods

Set real time clock for time, day and date. Choose how date is displayed (North American or European). Choose a 12 hour (AM/PM) or 24 hour time display.

Display the current software revision of the options installed on this specic unit (Humidier, Scale, SPO2, etc.)

Down Go to second service screen.

Chapter 4: Troubleshooting

Up Return to previous screen.

Check status of all self test the software runs continuously. These include: incubator heater on (INCHTRON), incubator heater o (I/HTROFF), humidier heater on (RHHTR), remote monitoring data stream (RS232LOOP), incubator fan on

Status

(FANON), and incubator fan o (FANOFF).

If the RS232 option is not installed, RS232LOOP will display fail. To test the circuit if the

option is installed, short pins 2

and 3 on the 9 pin connector on the back of the electrical enclosure.

Figure 4-2 Second Service Screen

Figure 4-3 Status Menu

Page 58

   





 



     

Chapter 4: Troubleshooting

Item Description

Select to bring up a diagnostic diagram of the unit that displays the status of all the switches. If

Switches

the circle next to the switch is lit, the switch is closed; if it is not lit, the switch is open. Also, while the switch status screen is active, you can hold down the alarm silence button to light the alarm light, system failure light and all LED segments to test them.

Override control

Baby mode control

Increase control

Decrease control

Air mode control

Bed up/down pedals

Figure 4-4 Switch Diagnostic Diagram

Item Description

Errors

Hours Run

Cal LV

Man temp al.

Pedals

BatLoad Used for manufacturing only, not for service use.

Cal RH

Lists a chronological log of the last 8 system errors that occurred. Shows error number and date. It is possible to clear the list.

Brings up a screen with 2 hour meters; one that is resetable and one that is not. To reset the resetable hour meter, highlight CLEAR and push the control knob.

Use to calibrate line voltage at the factory. To calibrate line voltage follow the procedure in section 3.4.

Use to enable or disable the patient temperature alarms in the air mode.

In the event of an bed up/down pedal failure, selecting pedals allows the bed to be raised or lowered (revision 1.5 software and higher).

Brings up humidier calibration screen. Refer to “Chapter 3: Calibration and Maintenance” for information on how this screen is used.

Boost air curtain control

Humidier

Page 59

Item Description

Cal Scale

Brings up scale calibration screen. Refer to “Chapter 3: Calibration and Maintenance” for information on how this screen is used.

A number of diagnostic readings appear on the right side of the service screens.

Chapter 4: Troubleshooting

Figure 4-5 First Service Screen: Diagnostics

Item Description

HFS High fan speed. Should be 1500 + 100 (measured at power up only) LFS Low fan speed. Should be 1000 + 100 (measured at power up only) RH Relative Humidity. % humidity read in the patient chamber SR Scale counts raw SC Scale counts corrected (1 count = 1 gram)

ADT

ACT

Air display temperature. Temperature read by the rst thermistor in the compartment air probe. Should be + 0.3ºC of ACT temperature.

Temperature read by second thermistor in the compartment air probe. Should be + 0.3ºC of ADT temperature.

P11 Reading from the rst thermistor in patient jack 1. Should be + 0.5ºC of P12 temperature. P12 Reading from the second thermistor in patient jack 1. Should be + 0.5ºC of P11 temperature. P21 Reading from the rst thermistor in patient jack 2. Should be + 0.5ºC of P22 temperature. P22 Reading from the second thermistor in patient jack 2. Should be + 0.5ºC of P21 temperature.

HSP

Heat sink sensor resistance. Should be approximately 20000 ohms @ 25ºC. Refer to the Tips section

4.6.7 for resistance verses temperature values.

LV1 Line voltage in rst mains circuit. LF 60Hz or 50Hz

MC Motor current. Shows current drawn by the e-base motor TV Thermistor voltage. Voltage of thermistor circuits located on the mother board.

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Chapter 4: Troubleshooting

Item Description

5V Power supply voltage. Should be + 0.25V of 5V VR Voltage reference. Independent voltage reference. Should be 1.235V + 1%

DV DAC output voltage. It should match the DAC volt value within 10 mV. BV Used for manufacturing only, not for service use.

Across the bottom of the screen the date of last time the temperature and line voltage calibration was performed appears plus the current time settings of the unit.

4.3 Alarm Messages

This section describes the alarm messages that may appear for the Girae Incubator. The alarms have been organized in this section alphabetically.

4.3.1 “Air Probe Failure” Alarm

Cause or Circumstances Failure Action

Measure the resistance of the two sensors at the harness from control board J1, Pins 1-2, and 3-4.

Under stable conditions, the resistances should be The software detected a dierence in the two air thermistors of > 0.5C

Defective control board.

Defective compartment

air probe or harness

within about 100 ohms. If defective, disassemble

the air probe assembly and disconnect the 5 pin

connector inside. Measure resistance of the two

thermistors at pins 1-2 and 3-4 to determine if the

sensor or harness is defective. Refer to the Tips

section 4.6.6 for resistance values.

If the thermistors and harness measure OK, replace

the control board.

4.3.2 “Air Temp >38C” or “Air Temp >40C” Alarm

Cause or Circumstances Failure Action

Air Temp >38C or Air Temp >40C alarm activated even though compartment temp is < alarm temp.

This alarm does not self reset after alarm condition is resolved.

None Push the alarm silence button to clear the alarm.

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4.3.3 “Baby Hot” or “Baby Cold” Alarm

Cause or Circumstances Failure Action

Baby Hot or Baby Cold alarm activated while unit is in Air Mode.

On service screen or nurse setup screen, select OFF for the MAN TEMP ALARM setting.

MANUAL TEMP alarm is set as active on the nurse setup screen or the service screen.

None

4.3.4 “Baby Mode Disabled” Alarm

Cause or Circumstances Failure Action

Baby mode has been disabled in the service screen and baby mode button is pressed.

None

Press alarm silence button to deactivate the alarm.

If you wish to use the baby mode, re-enable it in service screen.

Chapter 4: Troubleshooting

4.3.5 “Baby Probe 1 (or 2) Failure” Alarm

Cause or Circumstances Failure Action

Defective patient probe Replace patient skin probe.

Plug patient probe into probe jack 1. In service

Probe thermistors show dierence > 0.5C.

Defective patient probe jack wiring

mode, note the dierence between readings from P11 and P12. Plug the same probe into probe jack 2 and note the dierence between readings from P21 and P22. If they are greater there is resistance in the probe jack harness. Replace the harness.

4.3.6 “Bad Membrane Switch” Alarm

Cause or Circumstances Failure Action

All

Defective membrane switch panel

Test switches in service mode. Replace membrane switch panel.

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Chapter 4: Troubleshooting

4.3.7 “Bed Heater Failure” Alarm

Cause or Circumstances Failure Action

The software has turned on the incubator heater

but it is either not turning

on or the current sense circuit is not detecting that it is on.

The bed safety thermostat is open (possibly because the unit was shut down when the heater was hot).

Defective incubator heater, thermostat, or wire harness.

Defective incubator solid state relay (SSR).

Defective 50 pin ribbon cable between the relay and control board.

If the unit was shut o when the heater was hot, allow the fan to run for several minutes to cool to below 40 degrees C then power down and back up. If the failure still persists, continue .

Check the resistance of the incubator heater. Refer to the Tips section 4.6.2. If defective, remove the chassis cover and measure resistance at thermostat and heaters to determine if heater, thermostat, or wire harness is defective.

In service mode, check the voltage across the control line of the incubator heater SSR. This control signal varies between 0 VDC and about 12 VDC.

If voltage is present replace SSR. The two SSRs are identical and can be swapped for troubleshooting. If no voltage, continue.

Check for continuity on pins 36, 38, 39, and 40 (control signals). If defective, replace cable. If OK, continue.

Defective relay board. Replace the relay board.

4.3.8 “Bed Up/Down Pedal Failure” Alarm

Cause or Circumstances Failure Action

Check the switches on the service screen to determine which switch is shorted or open. Refer to the Tips section 4.6.8. To determine if a switch is defective or the wiring has a short:

One of the bed up/down pedal switches is shorted.

Defective bed up/down pedal switch or harness.

Defective relay board. Defective relay board. If the alarm persists, replace the relay board.

• If the shroud assembly is in two pieces, raise the lower shroud and check continuity at the switch connectors.

• If the shroud assembly is in three pieces, take o the back cover, disconnect the lower shroud from the base plate, lean the shroud forward to access the switches, and check continuity at the switch connectors. Check connections before reassembling.

Page 63

4.3.9 “Bed Up/Down Pedal Switches Disabled” Alarm

Cause or Circumstances Failure Action

Bed up/down pedal switches have been

disabled in nurse setup

screen or service screen and pedal is pressed.

None

When pedal is released, the alarm deactivates.

NOTE: If the bed up/down pedal switches are disabled in the service screen and you wish to use them, you can reactivate them only in the service screen.

4.3.10 “Down Pedal Pressed” Alarm

Cause or Circumstances Failure Action

When the bed down pedal switch is released, the

The bed down pedal switch was pressed and held on during power up.

Other

None

Bed down pedal switch

has failed

alarm deactivates. If alarm silence button is pressed or the pedal remains on for 100 seconds the Bed Down Pedal Failure alarm activates and the bed down pedal switches are disabled. Shut down the unit and power up to clear failure.

Refer to section 4.3.8 for troubleshooting information.

Chapter 4: Troubleshooting

4.3.11 “Fan Always in High Speed” Alarm

Cause or Circumstances Failure Action

Check the heat sink temperature sensor resistance in service mode. You can also check heat sink sensor resistance by disconnecting the harness from J3 at the control board. Measure between pins

Software cannot read temperature of the heat sink sensor in incubator heat sink.

Defective heat sink sensor or harness.

Defective control board.

1 and 2. Refer to the Tips section 4.6.5.

If defective, remove the chassis cover and disconnect the harness from heat sink sensor. Measure sensor resistance at pins 1-2 on the sensor harness to determine if sensor or harness is defective.

If the heat sink sensor and harness measure OK, then replace the control board.

4.3.12 “Fan Failure” Alarm

Cause or Circumstances Failure Action

NOTE: System failure 25 and FAN FAILURE are both

Fan rotation is not being

detected.

Optical fan sensor not detecting the fan

triggered by the optical fan sensor not detecting the fan. If this occurs at power-up, a system failure 25 will activate. If it occurs after the power tests are completed, the FAN FAILURE alarm will activate.

Page 64

Chapter 4: Troubleshooting

Cause or Circumstances Failure Action

Verify the fan hub is properly seated all the way

Fan or fan hub not seated properly

down on the fan shaft. (It may be necessary to wet the part to get it to slide all the way down on to the shaft.) Verify the fan is seated in the groove at the

top of the hub. Defective fan motor Replace the fan motor. Defective relay board Replace the relay board.

Replace with new design fan. The new fan can be

identied by the grooves molded in the 2 black

areas on the bottom of the fan (side facing the heat

Fan is not turning.

Old design fan.

sink). The old fan has smooth surfaced black areas. Defective or obstructed

optical sensor. Sensor holder or sensor gasket

Check that sensor, sensor holder, and gasket and

free of dirt or other contaminants. Clean or replace. dirty or crazed.

Defective 50 pin ribbon cable between the relay and control board.

Check for continuity on pin 9 (AIRFLOW). If defective,

replace the cable. Refer to the Tips section 4.6.9.

Defective relay board. If the problem persists, replace the relay board.

4.3.13 “Humidier Failure” Alarm

NOTE: The “Humidier Failure” alarm can be caused by non-humidier issues.

Cause or Circumstances Failure Action

The Motor Drive Failure alarm is on.

The Elevating base does not function. If the elevating base does not function, then safety relay 2 is not being energized.

Elevating base functions

If this alarm activates, it

opens safety relay 2 and

disables the humidier.

Defective 50 pin ribbon cable between the relay and control board.

Humidier safety thermostat is open.

Defective humidier heater or humidier safety thermostat.

Refer to section 4.3.14 for troubleshooting.

Check for continuity on pin 34 (safety relay 2 control signal). If defective, replace the cable. If good, replace the relay board.

Wait for the heater to cool. Cycle power to see if alarm resets.

Check safety thermostat and humidier heater resistance. Refer to the Tips section 4.6.5.

Page 65

Cause or Circumstances Failure Action

In service mode, verify mains voltage is present at the input to the humidier isolation transformer. (J55 1-2)

In service mode, verify mains voltage is present at the input to the humidier isolation transformer. (J56 1-2) J56 is on Humidier Interface Board mounted on relay board.

Check fuses F3 and F4 on the relay board. If OK, continue.

Check fuses on humidier interface board.

Humidier heater measures OK

No mains voltage at input to humidier isolation transformer. (J55, 1-2)

Relay boards rev 10 or higher.

Relay boards rev 9 or lower. Humidier Interface Board is mounted on relay board

Defective fuse. Relay boards rev 10 or higher

Defective fuse. Relay boards rev 9 or lower. Humidier Interface Board is mounted on relay board.

Defective relay board. Replace the relay board.

4.3.14 “Motor Drive Failure” Alarm

Chapter 4: Troubleshooting

Cause or Circumstances Failure Action

The software has detected that the elevating base motor was running when not turned on.

Defective relay board.

Replace the relay board.

NOTE: Humidier will not operate during this failure.

4.3.15 Power Failure (LED Indicator)

Cause or Circumstances Failure Action

Verify cord is plugged into a live wall outlet. Verify power switch/circuit breaker on back of unit is turned on.

Check the 5 volt supply. Refer to the Tips section

4.6.3. If no 5 volts, possible defective fuses on mains to the power supply. Check F1 and F2 on relay board.

Check input to power supply for mains voltage. If present and no 5 volts at output, then power supply is defective.

No AC power into unit

Mains power is present but the 5V power supply is not present.

On/O switch is not turned on.

Defective fuse F1 or F2 on relay board.

Defective power supply.

4.3.16 “Temperature out of Calibration” Alarm

Cause or Circumstances Failure Action

Calibration data is lost.

Defective calibration. Perform system calibration Defective control board. If problem persists replace the control board.

Page 66

Chapter 4: Troubleshooting

4.3.17 “Up Pedal Pressed” Alarm

Cause or Circumstances Failure Action

When the bed up pedal switch is released, the alarm

The bed up pedal switch was pressed and held on during power up.

Other

None

Bed up pedal switch has failed.

deactivates. If the alarm silence button is pressed or the pedal remains on for 100 seconds, the Bed Up Pedal Failure alarm activates and the Bed Up Pedal Switches are disabled. Shut down the unit and power up to clear failure.

Refer to section 4.3.8 for troubleshooting information.

4.4 Error Codes

The following sections describe the meaning of each system failure code for Girae Incubator. Each table lists the possible causes and the corresponding recommended actions, in the order in which they should be tried.

For information on Girae Scale error codes, refer to the Girae Scale Service Manual, which can be ordered as part of a Girae Incubator service manual kit: (US) 6600-0847-801 or (INTL) 6600-0847-802.

4.4.1 System Failure 0

System failure 0 indicates: Communication error between the display driver board and the control board.

Cause(s) Action(s)

Defective scale.

Defective scale harness.

Defective Servo Oxygen board.

Defective Servo Oxygen cable.

Defective battery.

Defective 14 pin ribbon cable between control

board and display

driver board. Defective display

driver board.

Disconnect the scale connector at probe panel. Power cycle the unit. If the error clears, replace the scale.

Disconnect the scale harness from J7 on the control board. (The scale may be plugged in.) Power cycle the unit. If the error clears, replace the scale harness.

Disconnect the RS485 harness from J8 on the Servo Oxygen board. Power cycle the unit. If the error clears, replace the Servo Oxygen Board.

Disconnect RS485 bus cable from J6 on the control board. Power cycle the unit. If the error clears, replace the RS485 cable going to the Servo Oxygen board.

The battery is used only for power failure. Try powering up the unit with the battery disconnected. If the error clears, replace the battery.

Check that the 14 pin ribbon cable is properly seated at J6 on the control board and at J20 on the display driver board. (Have all three parts on hand and try them one at a time. Try routing the cable around the outside of unit rst, then try the display board, and then try the control board. If the error is intermittent, replace all three.)

Replace display driver board.

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Chapter 4: Troubleshooting

Cause(s) Action(s)

Defective control board.

Replace control board.

4.4.2 System Failure 1

System failure 1 indicates: No Timer2.

Cause(s) Action(s)

The Timer2 circuit of the microprocessor on the control board is defective. Replace the control board.

4.4.3 System Failure 2

System failure 2 indicates: Timer2 too fast.

Cause(s) Action(s)

Defective scale.

Defective scale harness.

There is no line frequency signal to feed timer0 and timer1 of the microprocessor on the control board, or the timer2 of the microprocessor on the control board, is defective.

Disconnect scale connector at probe panel. Power cycle the unit. If the error clears, replace the scale.

Disconnect scale harness from J7 on the control board. Power cycle the unit. If the error clears, replace the scale harness.

Power cycle the unit. If system failure 8 appears, follow the instructions for system failure 8 in section 4.4.8. If system failure 2 persists, replace the control board.

4.4.4 System Failure 3

System failure 3 indicates: During ADC calibration, the software detected a channel out of range.

Cause(s) Action(s)

During system calibration, J1, J2, and J4 were not unplugged, or calibration jumper JP1 is not installed properly.

Defective circuit on control board. Replace the control board.

Before calibrating, make sure J1, J2, and J4 on the control board are disconnected. Verify JP1 is correctly positioned. (Refer to section “3.3 System Calibration” on page 21.)

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4.4.5 System Failure 5

System failure 5 indicates: The volt reference is out of the 1.171V - 1.259V range.

Cause(s) Action(s)

System calibration required. Perform system calibration. Defective control board. Replace the control board.

4.4.6 System Failure 6

System failure 6 indicates: Defective overtemp DAC circuit on the control board.

Cause(s) Action(s)

System calibration required. Perform system calibration. Defective control board. Replace the control board.

4.4.7 System Failure 7

System failure 7 indicates: 1.0 V Thermistor reference voltage is out of 0.951V - 1.049V range.

Cause(s) Action(s)

System calibration required. Perform system calibration. Defective control board. Replace the control board.

4.4.8 System Failure 8

System failure 8 indicates: No Line Frequency. When troubleshooting this error code, have control board, 50 pin ribbon cable, and relay board on hand.

Cause(s) Action(s)

Measure the signal on the control board between J9 pin 43, and TP1-4

Defective control board.

Defective 50 pin ribbon cable between the relay board and control board.

Defective relay board. Replace the relay board.

(Ground). It should be a 120 hertz signal. If the signal is OK, replace the control board.

If no signal, check continuity on the 50 pin cable, pin 43. If defective, replace the cable.

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4.4.9 System Failure 11

System failure 11 indicates: The ADC on the control board is not operating to spec (too slow).

Cause(s) Action(s)

Defective humidier sensor or cable

Defective control board.

Disconnect J1 on the control board. If it powers up OK, either the cable or the humidity sensor is defective. Reconnect J1 and disconnect the 4 pin humidity sensor connector in the compartment probe. If the unit now powers up OK, the humidity sensor is defective. If not, the cable is defective.

If the error persists with the replaced sensor or cable, replace the control board.

4.4.10 System Failure 12

System failure 12 indicates: Incorrect control board system software checksum.

Cause(s) Action(s)

Defective system software PROM on control board. Install new system software 6600-0234-850.

Defective control board.

If the error persists with new software, replace the control board

4.4.11 System Failure 13

System failure 13 indicates: Defective SRAM.

Cause(s) Action(s)

Defective SRAM circuit on control board. Replace control board

4.4.12 System Failure 14

System failure 14 indicates: Defective WDOG.

Cause(s) Action(s)

Defective watch dog circuit on control board Replace control board.

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4.4.13 System Failure 15

System failure 15 indicates: Safety Relay 1 test failure. Unable to turn incubator heater on or o by switching safety relay 1. When troubleshooting this error code, have on hand at least the 50 pin ribbon cable.

Cause(s) Action(s)

If this error occurs during system calibration, J1, J2, and J4 were not unplugged, or calibration jumper JP1 is not installed properly.

Air temperature sensor is above 40C at power-up.

Defective sensor in compartment air probe.

Defective compartment air probe cable

Before calibrating make sure J1, J2 and J4 on the control board are disconnected. Verify jumper JP1 is correctly positioned. (Refer to section “3.3 System Calibration” on page 21.)

If the unit was shut o when the heater was hot, allow the fan to run for a few minutes to cool to below 40C, then power down and back up.

Disconnect connector J1 from the control board. Power cycle the unit. If the error clears either the compartment air probe or the air probe cable is defective. Reconnect J1 and disconnect the compartment air probe connector at the compartment probe. If the unit now powers up OK the compartment air probe is defective.

If system failure 15 persists with connector J1 connected, and the compartment air probe disconnected, then the compartment air probe cable is defective.

In service mode, check the output voltage of the heater isolation transformer at the one pin connectors on the black and white wires on the transformer secondary. This secondary voltage should always read 115 volts.

• If 115 volts is present, then replace the relay board.

• If 115 volts is not present, check that the mains voltage is input to the transformer primaries.

• Be sure J49 on the relay board is properly connected.

• Verify the conguration plug on the transformer primary is seated properly.

No output from heater isolation transformer. Defective relay board.

To measure primary input voltage on 115 volt units:

• Verify mains voltage is present at pins 2-5 (brown and orange wires) on the transformer primary conguration plug.

• Verify mains voltage is present at pins 3-6 (yellow and blue wires) on the transformer primary conguration plug.

To measure primary input voltage on 230 volt units:

• Verify mains voltage is present at pins 2-6 (brown and blue wires) on the transformer primary conguration plug .

• If voltages are not present, verify mains voltage is present at pins 1-4 (black and red wires) on the transformer primary conguration plug.

• If not, replace the relay board.

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Cause(s) Action(s)

Defective heater isolation transformer

Defective DAC circuit on control board.

Defective solid state relay (SSR)

Defective incubator heater SSR

Defective current sense circuit on relay board.

Defective 50-pin ribbon cable If failure persists, replace 50 pin ribbon cable.

If voltage is present at primaries but no voltage output at secondaries, replace the heater isolation transformer.

If failure persists, replace control board.

Power up the unit in service mode. Run status test on the second service screen and verify that the I/HTROFF (incubator heater o) test fails. If the status test fails, then it is an SSR problem. If the status test does not fail, then try the recommended action for a defective current sense circuit on relay board, below.

Disconnect the black wire (larger diameter) from the AC side of the incubator heater solid state relay. Run status test. If I/HTROFF test passes replace the incubator heater SSR. If it still fails reconnect the wire to the SSR.

Replace relay board.

Chapter 4: Troubleshooting

4.4.14 System Failure 16

System failure 16 indicates: When the unit performed Power-on Self Test, the incubator heater could not be turned o.

Cause(s) Action(s)

If this error occurs during System

Calibration

Defective incubator heater SSR

Defective current sense circuit on relay board.

Reconnect J1, J2 and J4 on the control board. Put JP1 in Normal position. (Refer to section “3.3 System Calibration” on page 21.) Power up unit in normal operating mode and follow instructions for the error that occurs.

Disconnect the black wire (larger diameter) from the AC side of the incubator heater solid state relay. Run status test. If I/HTROFF (incubator heater o) test passes replace the incubator heater SSR. If it still fails reconnect the wire to the SSR.

If failure persists, replace relay board.

4.4.15 System Failure 18

System failure 18 indicates: Defective Variables.

Cause(s) Action(s)

Defective SRAM circuit on control board. Replace the control board.

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4.4.16 System Failure 19

System failure 19 indicates: No Audio Frequency.

Cause(s) Action(s)

Defective battery

Defective scale.

Defective scale harness.

Defective Servo Oxygen board.

Defective Servo Oxygen cable.

Defective audio circuit on control board.

Defective control board Replace the control board.

Battery is only used for power fail. Try powering up the unit with the battery disconnected. If the error clears, replace the battery.

Disconnect scale connector at probe panel. Power cycle the unit. If the error clears, replace the scale.

Disconnect scale harness from J7 on the control board. Power cycle the unit. If the error clears, replace the scale harness.

Disconnect the RS485 harness from J8 on the Servo Oxygen board. Power cycle the unit. If the error clears, replace the Servo Oxygen Board.

Disconnect RS485 bus cable from J6 on the control board. Power cycle the unit. If the error clears, replace the RS485 cable going to the Servo Oxygen board.

Replace socketed IC U22 on control board. If failure persists, replace the control board.

4.4.17 System Failure 20

System failure 20 indicates: Display WDOG Time Out.

Cause(s) Action(s)

Display driver board software is not performing correctly. Replace the display driver board.

4.4.18 System Failure 22

System failure 21 indicates: During operation, the incubator heater will not turn ON.

Cause(s) Action(s)

Power down the unit. During the system tests after power-up the unit should detect

Refer to other errors.

Error reading

distorted line signal.

system failure 15 or bed heater failure. Follow the instructions in this manual for those failures. Follow the instructions for system failure 15 in section 4.4.13 or for bed heater failure in section 4.3.7.

Check the revision of the relay board. The revision code is located in a triangle printed on the component side of the PCB. Refer to relay board Figure 6-34 (revision 10 or higher) and Figure 6-35 (revision 9 or lower). If the relay board is revision 10 or lower, replace with revision 13 or higher relay board.

If you have replaced the relay board with revision 13 or higher and you still have an intermittent problem, follow the instructions for system failure 15 in section 4.4.13.

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4.4.19 System Failure 23

System failure 23 indicates: During operation the system was unable to turn the incubator heater OFF.

Cause(s) Action(s)

Other errors.

Defective relay board.

Power down the unit. During the system tests after power-up, the unit should detect system failure 16. Follow the instructions in this manual for this failure.

If system failure 23 persists without system failure 16, replace the relay board.

4.4.20 System Failure 25

System failure 25 indicates: Fan rotation is not being detected.

NOTE: System failure 25 and FAN FAILURE are both triggered by the optical fan sensor not detecting the fan. If this occurs at power-up a system failure 25 will activate. If it occurs after the power tests are completed the FAN FAILURE alarm will activate.

Circumstance(s) Cause(s) Action(s)

Fan not connected. Check jack.

Fan is not turning

Fan is turning

Fan or fan hub not

seated properly. Defective relay

board. Defective fan motor. Replace fan motor.

Fan is turning too

slow.

Old design fan.

Defective or obstructed optical sensor. Sensor holder or sensor gasket dirty or crazed.

Defective 50 pin ribbon cable between the relay and control board.

Defective relay board.

Verify the fan hub is properly seated all the way down on the fan shaft and is seated in the groove at the top of the hub.

Replace relay board.

Check fan speed in service mode, should be about 1500 RPM in high fan speed. Note that this RPM measurement is only tested during the power up tests.

Replace with new design fan. The new fan can be identied by the grooves molded in the 2 black areas on the bottom of the fan (side facing the heat sink). The old fan has smooth surfaced black areas.

Check that sensor, sensor holder, and gasket and free of dirt or other contaminants. Clean or replace.

Check for continuity on pin 9 (AIRFLOW). If defective replace cable.

Replace relay board.

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4.4.21 System Failure 26

System failure 26 indicates: During the power up tests, the system was unable to turn o safety relay 1.

Cause(s) Action(s)

Defective relay board. Replace the relay board.

4.4.22 System Failure 27

System failure 27 indicates: Defective non-volatile memory.

Cause(s) Action(s)

Defective circuit on control board. Replace the control board.

4.4.23 System Failure 28

System failure 28 indicates: During operation, the display driver board lost communication with control board.

Cause(s) Action(s)

Refer to system failure 0.

Defective at ribbon cable between control board and display board.

Power down the unit, during the self-test the unit should detect system failure 0. Follow the instructions for system failure 0 in section 4.4.1.

If system failure 28 persists without system failure 0, replace the at ribbon cable between control board and display board.

4.4.24 System Failure 29

System failure 29 indicates: Defective signal on control board.

Cause(s) Action(s)

Defective control board Replace the control board.

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4.4.25 System Failure 30

System failure 30 indicates: Mains voltage reading LV1 is outside of the expected range.

Cause(s) Action(s)

Mains Voltage Comp Circuit is not calibrated correctly.

High or low mains voltage. This failure is triggered if the mains voltage is outside the following

ranges:

• 100V: 80-115V

• 115V: 95-132V

• 230V: 195-270V Defective 50 pin ribbon cable between the relay

and control board.

Defective relay board.

Defective control board. If the voltages are OK, replace the control board.

Calibrate the line voltage.

Connect to proper mains voltage source

Check for continuity on pin 48 and 49 (LineComp1,2) If defective replace cable.

Measure the voltages at the relay board:

• J37 pin 48-45 and J37 pin 49-45.

• If mains voltage 100/115 = 3-5 volts, dierence within 0.4 volts.

• If mains voltage 230 = 7-10 volts, dierence within

0.8.

• If not, replace the relay board.

4.4.26 System Failure 33

System failure 33 indicates: Defective RH Solid State Relay.

Cause(s) Action(s)

Defective RH Solid State Relay. Replace relay board

4.4.27 System Failure 34

System failure 34 indicates: Software revision level does not match.

Cause(s) Action(s)

The software revision of the control board and the display board are not compatible

This error may occur after replacing the control/display board. Be sure to install the software provided in the control/display board. Replace the System Software.

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4.4.28 System Failure 35

System failure 35 indicates: Wrong dipswitch set up.

Cause(s) Action(s)

Switches set wrong

Defective control board. Replace control board.

Check the 8 position dipswitch on the control board. Verify that Switch 1 is on and Switch 2 is o.

4.4.29 System Failure 50

System failure 50 indicates: Incorrect display driver board System Software checksum.

Cause(s) Action(s)

Defective System Software PROM on display driver board.

Defective display driver board.

Install new system software 6600-0234-850.

If the system failure persists, replace display driver board.

4.4.30 System Failure 51

System failure 51 indicates: Display Defective SRAM.

Cause(s) Action(s)

Defective SRAM circuit on the display driver board Replace the display driver board.

4.4.31 System Failure 52

System failure 52 indicates: Display No Timer2.

Cause(s) Action(s)

Defective display driver board. Replace the display driver board.

4.4.32 System Failure 53

System failure 53 indicates: Display Timer2 Too Fast.

Cause(s) Action(s)

Defective display driver board. Replace the display driver board.

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4.4.33 System Failure 55

System failure 55 indicates: Display board On Line Self Test Failure.

Cause(s) Action(s)

Defective display driver board. Replace the display driver board.

4.4.34 System Failure 98

System failure 98 indicates: Overow.

Cause(s) Action(s)

Software on the control board is not performing correctly.

Replace the control board.

4.4.35 System Failure 99

System failure 99 indicates: Logic problem on the control board.

Chapter 4: Troubleshooting

Cause(s) Action(s)

Software on the control board is not performing correctly.

Replace the control board.

4.5 Troubleshooting Symptoms

Symptom Possible Cause Action

Use an ohmmeter to verify the speaker resistance is about 8 ohms at relay board connector J40, pins 5-6. If defective, determine whether speaker or harness is defective as follows:

Defective speaker or harness.

No audio alarm.

Audio driver circuitry on control board is defective.

• If the shroud assembly is in two pieces, raise the lower shroud to access the speaker connector, and measure the resistance.

• If the shroud assembly is in three pieces, take o the back cover, disconnect the lower shroud from the base plate, lean the shroud forward to access the speaker connector, and measure the resistance.

Replace the control board.

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Chapter 4: Troubleshooting

Symptom Possible Cause Action

Unit was powered on and

Unit equipped with servohumidity but RH

setpoint only

shows 1-10.

the compartment probe was not plugged in at the

Cycle power after compartment probe is plugged in. probe panel (only on old style units with connector)

Defective humidity sensor Replace the humidity sensor. Defective control board. If problem persists, replace control board.

Remove reservoir, but take care because surface may be

hot! Check that the white reservoir switch button moves

freely. If it is stuck in the closed position it should be

replaced with the new style. (6600-1298-500)

Check resistance of reservoir switch at relay board harness

J32, 2-3. Switch should be closed when reservoir is closed

and open when reservoir is open.

Check for continuity on pin 6 (RHBOTTLE). If defective,

replace cable.

ADD WATER message stays on even after water has been added.

Reservoir switch button is jammed (only on units with old style button).

Defective reservoir switch.

Defective 50 pin ribbon cable between the relay and control board.

Defective relay board. Replace relay board. Defective control board. Replace control board. Pedal switches are disabled

on nurse setup screen or service screen.

Defective toroidal transformer

No mains input to the toroidal transformer.

Check Setup screen (wrench symbol) or service screen to

see if pedal switches are disabled.

Check the toroidal transformer. Refer to the Tips section

4.6.10. Replace transformer if defective.

Replace relay board.

Output voltage from the

Elevating base will not go up or down.

toroidal transformer is OK. Defective fuse on relay board.

Defective 50 pin ribbon cable between the relay and control board.

Check fuses F5, F6 on the relay board.

Check for continuity on pins 23, 24, 26, 27, 34 (motor

control and safety relay 2 control signals). If defective,

replace the cable. Output voltage from the

toroidal transformer is OK.

Fuses on relay board are

OK. Defective elevating

Check the voltage to the elevating column motor. Refer to

the Tips section 4.6.8. If OK, replace the elevating column

assembly. base motor.

Defective relay board. Replace relay board.

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Symptom Possible Cause Action

Unit will not switch to Baby Control Mode.

A patient probe is plugged

into Jack 2 on the probe panel.

Baby Control is disabled on

Service screen.

Defective scale.

Disconnect probe from Jack 2 (unit will only allow Baby Control operation with a single probe in Jack 1).

Select BOTH for Patient Control on service screen to activate Baby Control.

Disconnect scale connector at probe panel. Power cycle the unit. If error clears replace the scale.

Disconnect scale harness from J7 on the control board.

Defective scale harness.

Power cycle the unit. If error clears replace the scale harness.

Defective Servo Oxygen board.

Defective Servo Oxygen cable.

Disconnect the RS485 harness from J8 on the Servo Oxygen board. Power cycle the unit. If the error clears, replace the Servo Oxygen Board.

Disconnect RS485 bus cable from J6 on the control board. Power cycle the unit. If the error clears, replace the RS485 cable going to the Servo Oxygen board.

Remove the electrical enclosure cover and disconnect

Unit will not power up, alarm sounds.

Defective battery.

Defective power supply.

the battery. Power down and power up again. If the unit powers up, replace the 9V battery (66001024600).

Check power supply voltages. Refer to the Tips section

4.6.3. Verify power supply voltages at J23 on display driver

board.

Defective power harness to display board.

• +5V 1-2

• +12V 1-3

• +5STBY 1-4 Disconnect ribbon cable from J6 on control board. Power

Defective display driver

board

up unit. Girae logo should appear on display. After about 70 seconds the audible alarm sounds. If the logo does not appear replace the display driver board.

Defective control board. Replace control board.

Baby Hot or Baby Cold alarms activated while unit is in Manual

MANUAL TEMP alarm is selected on the Setup screen

Select OFF for MANUAL TEMP alarm on Setup screen.

Mode. Air Temp >38C or

Air Temp >40C alarm activated even though compartment

Alarm is not designed to automatically reset after alarm condition is resolved.

Push the alarm silence button to clear the alarm.

temp is < alarm.

Chapter 4: Troubleshooting

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Chapter 4: Troubleshooting

Symptom Possible Cause Action

Bed warms up very slowly, may not reach set temperature.

Unit always powers up in service screen mode.

One of the bed heater cartridges is defective.

Defective dipswitch setting

Override switch (>37C) on control panel shorted

Feel the heat sink to see if one side is cooler than the other.

Use care, since the heat sink can reach temperatures as

great as 121C (250F). Replace the cartridge on the cool

side.

Check position 8 on the control board dipswitch. Should be

set to O position.

Check switch on switch diagnostic screen.

Defective circuit on control

Screen refreshes every few seconds while scale is attached.

board (Unbiased RS485 bus during idle state).

Defective scale.

Defective scale harness.

Replace control board with revision 17 or higher.

Disconnect scale connector at probe panel. Power cycle

the unit. If error clears replace the scale.

Disconnect scale harness from J7 on the control board.

Power cycle the unit. If error clears replace the scale

harness.

Noise from speaker on power down.

Fan is running in high speed but

no FAN ALWAYS IN HIGH SPEED message and the

Boost Air Curtain

Indicator is not lit.

Microprocessor does not hold reset during power o.

This is normal condition for 90 minutes after power up, 45 min. after transition from open to closed bed mode, and during other conditions as determined by the heat control software.

If noise is excessive, replace control board with revision 17

or higher.

To check HIGH and LOW fan speed, power up the unit.

After the power up sequence is complete, hold down

the Boost Air Curtain button and press the decrease

temperature button to place the unit into low fan speed.

The Boost Air Curtain button will now toggle the fan

between high and low speeds.

Tilt the head of the bed platform all the way down while

holding the latch open, then let the latch close to capture

the tilt ball. (Refer to “Disassembling the Incubator for

Complete Cleaning” in the Operation and Maintenance

Bed will not lock in tilt position.

Tilt ball not engaged in

nger pocket latch.

manual.) Tilt brake pad failure. Replace the tilt brake.

Baby Cold or Baby

Hot Alarm does

not trigger at

0.5C or 1.0C in Air

Manual Temp. Alarm is disabled on Service Screen.

Enable Manual Temp. alarm.

Control mode. Humidier

reservoir is crazed (has hairline

Sterilization Replace humidier reservoir.

cracks).

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Chapter 4: Troubleshooting

Symptom Possible Cause Action

Humidier reservoir has scaling.

Use of tap water Replace humidier reservoir.

4.6 Additional Troubleshooting Tips

Following are tips on taking many of the measurements and diagnosing the failures that are referred to in the troubleshooting charts. For some tips, it may be necessary to determine the revision level of the relay board. The revision code is located in a triangle printed on the component side of the PCB. Refer to Figure 6-34 and Figure 6-35.

4.6.1 Raising and Lowering the Elevating Base

In the event of a system failure, it may be possible to raise or lower the elevating base in the service mode. Hold down the override button (>37) to bring up the service screen. The pedals are now activated and may assist in troubleshooting or transport.

If the switches still do not operate it may be possible to raise or lower the elevating base using the pedal function on page 2 of the service screen.

4.6.2 Incubator Heaters and Bed Safety Thermostat

There are two 115 volt incubator heaters rated at 225 watts at 104 volts and mounted at opposite ends of the incubator heat sink. They are always connected in parallel and are powered by isolated 115 volts from the heater isolation transformer. This voltage is switched by the incubator SSR.

The resistance of each heater is about 48 ohms and they are in parallel so you should measure about 24 ohms. Note that the bed safety thermostat is in series with the heaters so if the reading is open circuit you must take readings at the connectors under the bed to determine which is defective.

To measure the incubator heater resistance on units with revision 9 or lower relay boards, disconnect the black wire on the incubator SSR and the white wire on the output of the isolation transformer and measure between these 2 wires.

To measure the incubator heater resistance on units with revision 10 or higher relay boards, disconnect the black wire on the incubator SSR and the connector from J54 on the relay board. Measure between harness connector pin 4 and the black wire.

The incubator heater and bed safety thermostat resistance can also be measured by the removing the bottom cover and measuring directly at the components.

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4.6.3 Power Supplies

The 5V and 12V supplies are generated on the power supply. +5STBY is generated on the relay board. These voltages are distributed to the control board, display driver board, servo oxygen board, and expansion slots through a harness with a series of 4 pin connectors. The easiest place to measure the power supplies is at one of the spare 4 pin connectors on this power bus.

Signal Location Wire Color Value

+5V J42 pins 1-2 Orange and blue 4.75 to 5.25 +5VSTBY J42 pins 1-4 Orange and green 4.75 to 5.25 +12V J42 pins 1-3 Orange and red 10.8 to 13.2

The 5VSTBY should also be present during power fail.

+5VAN and -5VAN are generated on the control board and are only used on the control board. They can be measured on the test points on the control board.

Signal Location Value

+5V TP2 pins 1-4 4.75 to 5.25 +5VSTBY TP2 pins 3-4 4.75 to 5.25 +5AN TP1 pins 5-6 4.75 to 5.25

-5AN TP1 pins 4-6 -4.0 to -5.5

4.6.4 Switches/Thermostat

Use switch status diagram on the second service screen to assist in troubleshooting the switches.

Humidity reservoir Relay bd J32 pins 2-3 Closed when reservoir is closed Add water thermostat Relay bd J32 pins 1-3 Opens when reservoir needs water

Elevating base

Left or right up Relay bd J40 pins 2-4

Left or right down Relay bd J40 pins 1-4

Closed when either switch is

pressed

Closed when either switch is

pressed

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Chapter 4: Troubleshooting

The following switches are membrane switches. When closed the resistance should be less than 200 ohms.

Display Touch Panel Switches Alarm Silence Display Driver bd J21 pins1-2 Closed when switch is pressed >37 degrees Display Driver bd J21 pins1-3 Closed when switch is pressed Servo Control Display Driver bd J21 pins1-4 Closed when switch is pressed Up Display Driver bd J21 pins1-5 Closed when switch is pressed Down Display Driver bd J21 pins1-6 Closed when switch is pressed Intervention Display Driver bd J21 pins1-8 Closed when switch is pressed Manual Mode Inc. Display Driver bd J21 pins1-9 Closed when switch is pressed

4.6.5 Humidier Heater/Safety Thermostat

The humidier has two separate heater elements rated at 225 watts at 104 volts. They are connected in parallel for 115 volt operation and in series for 230 volt operation. The humidier safety thermostat is in series with the heater. It opens at 130 +/-5 C and closes at 90 +/-8 C. Measure the resistance at J53.1 to J53.3.

The resistance of each heater is about 144 ohms so it should measure about 72 ohms for 115 units, 288 ohms for 230 units.

4.6.6 Compartment Air Probe and Patient Probes

Use the service screen to read the temperature of the compartment and patient probes. There are two thermistors in each probe. During stable temperature conditions the thermistors should read the same resistance within a few ohms.

Patient probe #1 Control bd J4 pins 1-3, 2-3 Patient probe #2 Control bd J2 pins 1-3, 2-3

Compartment probe Control bd J1 pins 1-2, 3-4

Temperature (C) Resistance (Ohms)

20 12527 25 10000 30 8037 35 6500

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4.6.7 Incubator Heat Sink Sensor Thermistor

Use the service screen to read the resistance of the heat sink sensor.

Thermistor Control bd J3 pins 1-2

Temperature (C) Resistance (Ohms)

20 25000 25 20000 30 16102 35 13048 40 10636 80 2506 90 1827 100 1353 110 1017 120 775

4.6.8 Elevating Base Motor

If you must replace a footswitch when the bed is all the way down, use pedal screen on service screen to raise or lower the bed.

The e-base is driven at 24 volts DC (acceptable range 24-32). The following chart shows the control signal values and the output voltages for each of the motor conditions.

Control Signals, Relay Board

Switch

Raise E-base 0 0 1 0 +24V Gnd Lower E-base 0 0 0 0 Gnd +24V None NA 1 NA NA NA NA

J37 pin 23 J37 pin 26 J37 pin 24 J37 pin 27 24V SELECT E/H ACTIVATE NVERTPOLARITY E/H SELECT J45-1 J45-2

E-base

4.6.9 Troubleshooting the 50 Pin Ribbon Cable

All of the communication between the control and relay boards passes through the 50 pin ribbon cable. Many of the troubleshooting procedures in this manual recommend that you verify continuity for specic pins in the cable. Because it is dicult to remove and measure the cable without possibly changing the resistance, it is suggested that you keep a spare 50 pin ribbon cable to use as a troubleshooting tool.

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4.6.10 Troubleshooting the Toroidal Transformer

Perform the following tests in service mode. The referenced voltages should always be present when the unit is in service mode. In normal operating mode, the voltages are not present if safety relay 2 contacts are open.

1. Check the output voltage of the toroidal transformer at J44 pins 1-2 and at J44 pins 3-4. Voltages should be about 15 volts AC .

2. If the voltage is not present verify that mains voltage is present at the primary input to the toroidal transformer in service mode. This voltage can be measured at relay board connector J51 pins 1-2. It can also be measured at the conguration plug on the toroidal transformer pins 1-4.

3. If the primary voltage is present and there is no output voltage, the toroidal transformer is defective.

4. If the primary voltage is not present, then replace the relay board.

4.6.11 Interpreting Serial Numbers

Datex-Ohmeda products have unit serial numbers with coded logic which indicates a product group code, the year of manufacture, and a sequential unit number for identication. The serial number is in the following format:

AAAX11111

The X represents an alpha character indicating the year the product was manufactured; H = 2004, J = 2005, etc. I and O are not used.

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Chapter 4: Troubleshooting

4.7 Servo Controlled Oxygen

4.7.1 Servo Controlled Oxygen Service Screen

To access the service screens, hold in the override button (>37) during power up until the software revision screen appears. Release the button and the rst service screen will appear. Select DOWN on the rst screen to go to the second service screen. Select Servo O2 to bring up the Servo Controlled Oxygen service screen.

Figure 4-6 Servo Controlled Oxygen Service Screen

Item Description

K1 Select to open or close the relay on Relay PCB that powers the valves. Cal 02 Initiates calibration routine. oxygen0 Oxygen reading in percent from rst sensor cell:

Select to open or close supply valve one in the valve housing located beneath the electrical enclosure.

Select to open or close supply valve two in the valve housing located beneath the electrical enclosure.

Select to open or close calibration valve in the sensor housing located beneath the bed. Open is calibration position and closed is the normal operation position. The calibration fan is on and the cooling fan is o when VC is open.

NOTE: The cooling fan is on whenever the Servo Controlled Oxygen service screen is selected and VC is closed.

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Item Description

oxygen1 Oxygen reading in percent from second sensor cell: sensor0 Voltage output in millivolts from rst sensor cell.

Voltage output in millivolts from second sensor cell.

Chapter 4: Troubleshooting

sensor1

NOTE: The following information applies to the oxygen0, oxygen1, sensor0, and sensor1 values:

• For software version 1.40 or previous versions, 23 mv - 280 mv = 21% - 100% O2.

• For software version 1.50 or later versions, 5 - 90 mv = 21 - 100% O2.

temp

humidity

Temperature in degrees Celsius read from a sensor inside the sensor housing located beneath the bed. Refer to temperature to resistance curve in the Tips section 4.7.3.4.

Relative humidity in percent read from a sensor inside the sensor housing located beneath the bed.

4.7.2 Servo Controlled Oxygen Alarm Messages

Alarm Message Meaning Cause Action

Be sure supply is greater than 45psi (310 kPa)

Low Oxygen

High Oxygen

Sensor1 reading is > 3% below the oxygen set point 7 minutes after a set point change.

Sensor1 reading more than 3% above set point

Low O2 supply pressure or ow.

Inlet screen occluded. Clean or replace screen. Air leaks into infant

compartment. Supply Valve not

opening. End cap safety valve

not opening. Calibration valve is not

closing.

Infant compartment vents occluded.

Oxygen set point recently lowered.

Supply valve(s) not closing.

and ow rate is greater than 45 L/min. If ow rate is <45 check that the inlet screen in the regulator is not occluded.

Be sure all doors and portholes are closed

Check supply valves. Refer to the Tips section

4.7.3.1. Check valve and spring assembly. Refer to

the Tips section 4.7.3. Check the calibration valve. Refer to the Tips

section 4.7.3.2. Check to be sure that the two vents in the

infant compartment under the bed are not occluded.

Allow time for oxygen level to drop.

Check supply valves and kinked hoses. Refer to the Tips section 4.7.3.1.

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Chapter 4: Troubleshooting

Alarm Message Meaning Cause Action

In service mode sensor0 and sensor1 should be 23-280. If outside this range replace the

Defective Sensor(s)

sensors. If in range ensure oxygen0 and oxygen1 read within 3% of each other or replace the sensors.

Be sure sensor housing is seated properly

Oxygen Probe

Failure

One of the sensors

is reading out

of range (23280 millivolts) or the dierence between the two

Leak or occlusion in sensor housing area.

and the retaining screws are tight. Be sure sensor gaskets are in place and the tubing is seated correctly in the connectors. Check to be sure that the two vents in the infant compartment under the bed are not occluded.

O2 sensors is above 3%.

Defective cable or connection.

Measure the voltage at J85.8-J85.7 (sensor0) and J85.6-J85.7 (sensor1) and compare them to displayed sensor0 and sensor1. If the measurement is the same as the displayed, check the cable and sensor contacts.

Defective Servo O2 board.

If the measurement is not the same as the displayed, replace the Servo O2 board.

Servo oxygen unit has never

O2 Cal Lost-No O2

been calibrated. Unit will not

operate until initial

calibration is

Perform oxygen calibration.

Run calibration.

performed.

Cell voltage less than 33 mV.

Earlier software versions did not store voltages this low.

Replace display software with 1.62 or higher.

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Alarm Message Meaning Cause Action

Unit is cold: <15 degrees C.

Allow unit to warm up.

Cooling fan is not

Oxygen System

Failure 1

The sensor

plug thermistor temperature

reading is out of the range:

15C-55C.

running when the

sensor housing

temperature gets above 50 degrees.

Defective sensor plug thermistor or cable.

Test the cooling fan. Refer to the Tips section

4.7.3.3.

Disconnect the cable and measure the resistance of the thermistor between J85.4 and J85.5. Refer to R/T chart in the Tips section 4.7.3.4. If sensor is shorted, open, or values don’t agree with the R/T chart, replace the sensor plug assembly or the cable.

Defective servo O2 board.

If resistance is in range replace the servo O2 board.

Measure the humidity sensor voltage

Oxygen System

Failure 2

The RH reading is out of valid range: 1-99. When out of

range it displays 0

in service mode.

Defective sensor plug.

Defective servo O2 board.

between J85.2 and J85.1. If the voltage is outside the range of 0.7V- 4.0V, replace the sensor plug assembly.

If it is in the correct range, replace the servo O2 Board.

The checksum test

Oxygen System

Failure 3

performed during power up testing

Defective Microcontroller.

Replace microcontroller U6 on the Servo O2 board.

failed.

Analog to digital

converter circuit

Oxygen System

Failure 4

self test failed. The

reading of Vtest

is out of the valid

Defective Servo O2 board.

Replace servo O2 board.

range: 1.216V-

1.254V. After calibration,

both supply

valves are

Check O2

supply

opened and after

approximately 20

O2 supply is not connected.

Verify O2 supply, minimum 45psi (310kPa) is connected to the inlet.

seconds, sensor1

reading is not

greater than 23%.

Chapter 4: Troubleshooting

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Chapter 4: Troubleshooting

Alarm Message Meaning Cause Action

O2 supply is not connected.

Calibration valve stuck in calibration position.

Verify O2 supply, minimum 45 psi (310 kPa) and 45 L/min is connected to the inlet.

Check the calibration valve, Refer to the Tips section 4.7.3.2.

Check O2 Supply

Oxygen System

Failure 5

alarm has been silenced twice

and the sensor1 reading is still not

greater than 23%.

Supply valves not opening.

Leak or occlusion in sensor housing area.

Check supply valves. Refer to the Tips section

4.7.3.1.

Be sure sensor housing is seated properly

Oxygen System

Failure 6

The Girae control board cannot communicate with Servo O2 board.

Defective Servo O2 board.

Defective Cable.

Replace servo O2 board.

Check that the cable between the Girae control board and the Servo O2 board is seated properly.

Power up test

Oxygen System

Failure 7

detected a problem with the

Defective Servo O2 board.

Replace Servo O2 board.

watchdog circuit.

Calibration failed

In calibration mode, after 5 minutes, both

sensors are not reading

between 23 and 55 millivolts so

Calibration valve is

not opening or the

calibration fan is not

Check the calibration valve and fan. Refer to the Tips section 4.7.3.2.

turning on.

Defective sensors. Replace the sensors.

the unit cannot calibrate.

If other sources of oxygen are not in use, leak in Servo O2 system.

Check for valve leak. Refer to the Tips section

4.7.3.

FiO2>26%

Elevated O2 levels but Servo O2 is not turned on.

SENSITIVE TO ELECTROSTATIC DISCHARGE CAUTION

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Chapter 4: Troubleshooting

4.7.3 Servo Controlled Oxygen Troubleshooting Tips

4.7.3.1 Check Supply Valves

Power up unit in service mode. Select Servo O2 on second page. Be sure O2 is connected. Open V1. You should hear gas ow. Close V1, open V2. You should hear gas ow. Close V2, gas ow should stop.

If both valves are not opening, test the fuses and supply valves. Disconnect J83 at the Servo O2 board. Measure the resistance on harness pin 1 to pin 2. It should be the supply valve resistance (50 to 100 ohms). If not, the fuse is opened or the supply valve is defective. Repeat for the second supply valve with pins 3 to 4. If the valves check OK, the Servo O2 board is defective.

NOTE: With one supply valve open the ow rate should me be a minimum of 35 L/min. With both supply valves open, the minimum ow rate should be 40 L/min. If the ow rate is low, check that the regulator inlet screen is not occluded.

4.7.3.2 Check Calibration Valve/Calibration Fan

The calibration valve is located beneath the chassis in the sensor housing. The calibration fan is mounted in the sensor housing next to the calibration valve. Power up unit in service mode. Select Servo O2 on second page. Open VC. This should open the calibrate valve and turn on the calibration fan. Verify the calibration fan is running. If the fan is running then the Servo O2 board is OK and the calibration valve may be defective. If the fan is not running check the control signal from the Servo O2 board to verify voltage is present when VC is opened to determine if the fan or board is defective.

4.7.3.3 Check Cooling Fan

The cooling fan is mounted to the sensor housing door on the chassis cover. Power up unit in service mode. Select Servo O2 on second page. The cooling fan should be running.

If fan is not running verify 10.0 - 13.2 Volts at J86-1 to J86-2. If voltage is present the fan is defective. If voltage is not present the Servo O2 board is defective. Open VC, you should hear a click and the cooling fan should stop. If the fan does not stop the Servo O2 board is defective.

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Chapter 4: Troubleshooting

4.7.3.4 Sensor Housing Temperature Sensor Temperature to Resistance Curve

Temperature Resistance

15C 15.720 kohm 25C 10.000 kohm 30C 8.056 kohm 35C 6.530 kohm 40C 5.326 kohm 45C 4.369 kohm 50C 3.604 kohm 60C 2.491 kohm

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Chapter 5: Repair Procedures

SENSITIVE TO ELECTROSTATIC DISCHARGE CAUTION

WARNING:

After performing any repair or calibration, always perform the Service Checkout Procedure before putting the unit back into service.

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Chapter 5: Repair Procedures

5.1 Hood Removal for Replacement

Refer to “Figure 5-1 Hood” and “Figure 5-3 Compartment Probe”.

Compartment probe

Hood hinge

Snap fastener

Figure 5-1 Hood

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Chapter 5: Repair Procedures

1. Open both side doors.

2. Using a small straight blade screwdriver, remove the 2 snap fasteners from the inside of the hood that secure the hood to each of its hinges. Each fastener has two halves that snap together and can be pried apart.

3. Remove the compartment probe and cable clip on the hood back wall as described in section 5.4.

4. Push the trigger on the hood latch post to disengage the latch and carefully lift the hood o the chassis.

5.2 Porthole Door Replacement

Refer to “Figure 6-6 Side Door (East/West)”.

1. Use a at edge screwdriver to pry o the hinge cover.

2. Open the door to unload the springs.

3. Slide the hinge pin down, out the hole at the bottom of the hinge.

4. Remove the porthole door.

5. Now the door springs can be accessed along with screws that secure the inside half of the hinge cover.

6. To replace the porthole door, put the door back in place in the open position, install the springs, then slide the hinge pin back in place.

7. Close the door and snap the hinge cover back in place, keeping the thin side of cover closest to the porthole.

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Chapter 5: Repair Procedures

5.3 Uprights and End Caps

Refer to “Figure 5-2 Uprights and End Caps”.

Upright

Top end cap

Mounting studs

Ground wire

Bracket casting

Decorative strip

Upright

Bottom end cap

Figure 5-2 Uprights and End Caps

1. Slide the decorative strip up about 1/2” in the groove on the outside of the upright to access hardware that secures the lower end cap. You may wish to use a piece of tape to grip the strip. Use a 2.5 mm hex key to remove the screw, then remove the bottom cap. Slide the decorative strip down to access the two screws that secure the upper end cap, then remove the top end cap.

2. Using a 2mm hex key, remove the 4 button head socket screws and split ring washers that secure the back cover to the display module and remove the cover.

3. Remove the 2 screws that secure the hood latch receptacle to the upright and remove the receptacle.

4. Using a 2mm hex key, remove the screw that secures the wire cover to the side of the upright.

5. To remove the wire cover, slide the wire cover up about ½”, and then pull it straight back by grasping its back edge.

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Chapter 5: Repair Procedures

6. Using a 3mm hex key, remove the 2 screws that secure the display module to the nut bar and pull the nut bar up and out of the upright. Using a 3mm hex key, remove the screw that attaches the ground wire. Be careful not to drop the star washers down into the upright.

7. Hold on to the upright, and using a 4mm hex key, remove the 2 screws in the holes in the lower side of the upright . Remove the entire upright.

5.3.1 Re-installing the Upright

1. To assist in reattaching the upright to the unit, there are four mounting studs on the bracket casting that mate with four holes in the upright. Place the upright on the studs. Be careful not to pinch any wires between the unit and the upright.

2. Secure the upright to the unit by reinstalling the 2 screws in the holes inside the upright. Apply Loctite

242

to the screws. Be careful not to drop the screws into the upright.

3. Attach ground wire to rail. Fasten the display module to the upright with the two screws and nut bar removed earlier.

4. Reinstall the wire cover. Take care to route the wires in the upright channels and not to pinch them with the cover when securing with the screw.

5. Reinstall the hood latch receptacle with the two screws removed earlier.

6. Attach ground wire to rail. Fasten the display module to the upright with the two screws and nut bar removed earlier.

7. Fasten the back panel to the display module with its 4 mounting screws.

8. Slide the decorative strip up and install the end caps.

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Chapter 5: Repair Procedures

5.4 Compartment Probe Repairs

Refer to “Figure 5-3 Compartment Probe”.

Probe shield

Hood latch post

Compartment air probe

O-ring

Humidity sensor

Cylindrical spacer

Break plate

Jack cable clip

Figure 5-3 Compartment Probe

Probe housing cover

1. Using a 2.5 mm hex key, remove the screw that secures the jack cable clip to the hood back wall.

2. Remove the 2 screws (2mm hex key) that secure the probe housing cover and remove it. The top screw secures the probe shield, so that it can now be removed from the inside front of the probe housing.

3. Disconnect the electrical connectors for the temperature and humidity sensor (if installed) wires and remove the compartment air probe.

NOTE: Some early units have compartment air probes with jack connectors at the probe panel and should be disconnected there.

4. Remove the 4 screws in the break plate and remove the plate.

5. To replace humidity sensor, pull it back out of the probe housing. Slide the wires out of the cylindrical spacer. Place the O-ring over the tip of the new sensor, and gently push it back into the housing using the cylindrical spacer until the O-ring seats. The sensor tip should be visible, but not up against its guard. Check

to ensure that the O-ring did not roll over the sensor ange during insertion.

NOTE: Always perform Humidier Calibration after replacing the humidier sensor.

6. To replace the temperature sensor, you must replace the entire probe housing.

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Chapter 5: Repair Procedures

7. When reassembling the probe housing make sure the groove in the break plate faces the probe housing cover. Also check that the temperature sensor is oriented so that it is on top.

5.5 Lower Unit Repairs

5.5.1 Removing the Chassis Cover with the Storage Drawer in Place

Refer to “Figure 5-4 Chassis Bottom Cover”.

Wire raceway cover

Chassis cover

Chassis

Figure 5-4 Chassis Bottom Cover

1. Slide the drawer all the way over in one direction, and use a 2.5 mm hex key to remove the 3 chassis cover screws on one side.

2. Slide the drawer to the other side and remove the 3 remaining screws from the cover.

3. Remove the humidier reservoir.

4. Remove the bottom 2 screws (2mm hex key) that secure the right end of the wire raceway cover.

5. Flex the raceway cover and carefully slide the cover panel forward until it drops o the back drawer slide.

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Chapter 5: Repair Procedures

6. Rotate the cover slightly and push it out the right side of the unit.

7. Remove the ground wire.

5.5.2 Incubator Fan/Motor/Optical Sensor

Refer to “Figure 5-5 Fan Motor” and “Figure 5-6 Heat Sink and Fan”.

Motor

Motor shaft

Thermostat

Motor isolators

Motor bracket

Figure 5-5 Fan Motor

1. Remove the rotating bed, translation deck, tilt platform and pan.

2. Remove the fan, fan hub, and fan seal from the top of the fan motor shaft.

3. Remove the chassis cover. (Refer to section 5.5.1.)

4. Disconnect the motor leads.

5. Remove the 4 screws in the motor bracket and remove the motor assembly.

6. The motor isolators pop out of the holes in the bracket.

7. To replace the optical sensor, disconnect its connector, remove the screw from the boss in the chassis that holds it in place, and remove the assembly.

Datex-Ohmeda Giraffe Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual