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Summary of Contents for Ohmeda Ohio Care Plus
- Page 1 Ohio Care Plus ® ® Servo-controlled humidifier Operation, Maintenance, Service Manual and Installation Instructions Relative Humidity Set RH. Enable Auto Shutoff / Water System Fail...
- Page 2 Ohmeda Regional Service Center. This Product or any of its parts should not be repaired other than in accordance with written instructions provided by Ohmeda and by Ohmeda trained personnel.
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Page 3: Table Of Contents
Definitions................................. iii What the attention symbol means ....................... iii Warnings ..................................iv Cautions ..................................iv 1/Introduction Introducing the Ohio Care Plus Servo-controlled Humidifier Accessory ........1-1 Description ................................1-2 2/General Information The humidifier servo-control .......................... 2-1 Controls and Displays ............................2-2 Operator prompts ............................... - Page 4 Table of Contents Valve Housing Re-assembly ..........................6-11 Humidifier Controller Disassembly/Reassembly ...................6-12 Humidifier Control/Display Board Removal/Installation ..............6-13 Humidity Sensor Replacement........................6-13 Sensor Calibration .............................6-15 Valve Checkout..............................6-16 Electrical Safety Check .............................6-16 7/Illustrated Parts Humidifier Lid and Tray Assembly ..................... 7-1 Humidifier Controller Assembly ......................7-2 Humidifier Heat Sink and Valve Assembly ..................
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Page 5: General Precautions
General Precautions Definitions 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. This symbol appears throughout the service portions of this manual. When this symbol appears next to a procedure, static control precautions must be observed. -
Page 6: Warnings
General Precautions Warnings Before using the Ohio Care Plus Servo-controlled humidifier, read through this entire manual. As with all medical equipment, attempting to use this device without a thor- ough understanding of its operation may result in patient or user injury. This device should only be operated by personnel trained in its operation and under the direction of qualified medical personnel familiar with the risks and benefits of this type of device. - Page 7 Service Language Disclaimer 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.
- Page 8 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. VÝSTRAHA Tento provozní návod existuje pouze v anglickém jazyce. (CS) • 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 findes kun på engelsk. (DA) • Hvis en kundes tekniker har brug for et andet sprog end engelsk, er det kundens ansvar at sørge for oversættelse.
- Page 9 HOIATUS See teenindusjuhend on saadaval ainult inglise keeles (ET) • 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.
- Page 10 ΠΡΟΕΙΔΟΠΟΙΗΣΗ Το παρόν εγχειρίδιο σέρβις διατίθεται μόνο στα αγγλικά. (EL) • 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...
- Page 11 このサービスマニュアルには英語版しかありません。 (JA) • 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. (KO) • 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.
- Page 12 OSTRZEŻENIE Niniejszy podręcznik serwisowy dostępny jest jedynie w języku angielskim. (PL) • 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. (PT-BR) • Se outro serviço de assistência técnica solicitar a tradução deste manual, caberá ao cliente fornecer os serviços de tradução.
- Page 13 ОСТОРОЖНО! Данное руководство по техническому обслуживанию представлено только на английском языке. (RU) • 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...
- Page 14 VARNING Den här servicehandboken finns bara tillgänglig på engelska. (SV) • 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.· (SL) • 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.
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Page 15: 1/Introduction
Introducing the Ohio Care Plus Servo-controlled Humidifier Accessory Thank you for selecting the Ohio Care Plus Servo-controlled Humidifier accessory. The Care Plus Humidifier provides an efficient supply of humidified air to help meet your patient’s thermoregulatory needs by reducing convective and evaporative heat loss. -
Page 16: Description
1/Introduction Description The Ohio Care Plus Servo-controlled Humidifier uses a heating element in a water tray under the incubator to provide humidification. An electronic controller adjacent to the water tray uses a microprocessor to control the heating element. The heating element produces warm water vapor and opens a valve that releases that vapor into the incubator patient chamber. -
Page 17: 2/General Information
2/General Information 2/General Information In this section The humidifier servo control ........................2-1 Controls and displays ............................2-2 Operator prompts ............................2-3 The humidifier servo-control The Care Plus Servo-controlled Humidifier adjusts humidity output to achieve a desired humidity level. The desired humidity level, which appears in the display on the front of the humidifier, can be adjusted using the humidity switches (? and M). -
Page 18: Controls And Displays
2/General Information Controls and Displays RH Display The humidity display shows the relative humidity inside the incubator chamber. Relative Humidity Relative humidity levels between 5 and 95% RH are displayed to an accuracy of ± 10% of the actual relative humidity at the center of the bed. Set RH. -
Page 19: Operator Prompts
2/General Information Relative Humidity Set RH. Enable Auto Shutoff / Water System Fail Figure 2-1 Control Panel Operator prompts Silencing a prompt The system failure prompt cannot be silenced. The low water level prompt can be silenced by sliding out the humidifier fill tray. System fail A system failure automatically shuts off the heater and triggers a continuous tone when an electrical failure is detected. - Page 20 Notes 2/General Information...
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Page 21: 3/Checkout
3/Checkout 3/Checkout In this section Mechanical checks ............................. 3-1 Controller checks ..............................3-1 Operational checks ............................. 3-2 WARNINGS Do not perform the preoperative checkout procedure while a patient occupies the incubator. Complete the “Checkout ” section of this manual before putting the unit into operation. -
Page 22: Operational Checks
3/Checkout Switch the power On and check that: a. The incubator humidity is displayed. b. The % RH bar display blinks. Press the enable button and check that the enable indicator lights. Check that pressing the humidity switches (? and M) allows the humidity control settings to be adjusted up to 85% RH. -
Page 23: 4/Using The Servo-Controlled Humidifier
4/Using the Servo-controlled Humidifier 4/Using the Servo-controlled Humidifier In this section Basic operation procedure ..........................4-1 WARNING: Complete the “Checkout” section of this manual before putting the unit into operation. If the humidifier fails any portion of the checkout procedure it must be removed from use and repaired. - Page 24 Notes 4/Using the Servo-controlled Humidifier...
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Page 25: 5/Maintaining The Servo-Controlled Humidifier
5/Maintaining the Servo-controlled Humidifier 5/Maintaining the Servo-controlled Humidifier In this section Maintenance Schedule ............................5-1 Operator maintenance .......................... 5-1 Service maintenance ..........................5-2 Troubleshooting humidifier problems ......................5-2 Recording error codes ............................5-2 Cleaning schedule .............................. 5-3 Disassembling the servo-controlled humidifier for cleaning ............. 5-3 Cleaning and disinfecting the servo-controlled humidifier .............. -
Page 26: Troubleshooting Humidifier Problems
5/Maintaining the Servo-controlled Humidifier Troubleshooting humidifier problems Symptom Possible cause(s) Recommended action(s) Controller does not come on Power is off or the power Connect the power cord is disconnected All indicators go out while the Open fuse Discontinue use and call unit is in use service Auto Shutoff/... -
Page 27: Cleaning Schedule
5/Maintaining the Servo-controlled Humidifier WARNINGS The heater is hot enough to cause skin burns. Unplug the humidifier and allow the heater to cool (approximately 30 minutes) before disassembly or cleaning. Always disconnect the power before performing service or maintenance procedures detailed in this manual. Apply power only if you are specifically instructed to do so as part of the procedure. -
Page 28: Cleaning And Disinfecting The Servo-Controlled Humidifier
5/Maintaining the Servo-controlled Humidifier Seals Humidifier lid Humidifier fill tray Figure 5-1 Disassembling the humidifier Cleaning and disinfecting the Servo-controlled Humidifier WARNING Clean the humidifier after each patient. CAUTION Do not clean the humidifier with peroxide solutions, organic solvents, scouring compounds, strong acids, or strong bases. -
Page 29: 6/Service
6/Service 6/Service In this section Service Language Notice ..........................6-2 Repair Policy ................................6-9 Functional Description ............................6-10 Power Supply ............................6-10 Microcontroller ............................6-11 Humidity Sensor ............................6-11 Humidity Circuit .............................6-11 Anolog-to-Digital Converter ......................6-11 Watchdog circuit ............................6-12 Microswitch Circuit ..........................6-12 Safety Relay Circuit ..........................6-12 Audio Prompt Circuit ..........................6-13 Solid State Relay Circuit ........................6-13 Heater Current Sense Circuit ......................6-13... -
Page 30: Repair Policy
Repair Policy Warranty repair and service must be performed by an Ohmeda Service Representative or at the Ohmeda Service and Distribution Center. To contact an Ohmeda Service Rep- resentative, call the nearest Ohmeda Regional Service Office listed on the back cover. -
Page 31: Functional Description
Detailed information for more extensive repairs is included in this manual solely for the convenience of users having proper knowledge, tools and test equipment, and for service representatives trained by Ohmeda. Functional Description The humidifier board contains all the electronic circuitry involved with the measurement, control, computation, memory, logic, power management, and decision making functions of the servo-controlled humidifier. -
Page 32: Power Supply
6/Service The following sections describe, in detail, the functions of each circuit on the printed circuit board. General design practices were followed to attenuate the EMI/RFI noise. On all signal lines traveling into or out of the control portion of the printed circuit board, ferrite bead and capacitors are installed. -
Page 33: Anolog-To-Digital Converter
6/Service The op-amp U3B is used to adjust the circuit for offset. This is the sensor (and circuit) calibration. The potentiometer R30, one half of the voltage divider (R30/R20+R30), is adjusted to calibrate the unit. The adjustability of this divider circuit is 0V to 4.85V. The op-amp U3C is used to add 650mV to the sensor signal. -
Page 34: Safety Relay Circuit
6/Service The microcontroller is programmed to internally pull this line high. When the fill tray is installed this line is a low logic level; when the fill tray is removed this line is a high logic level. Safety Relay Circuit Relay S2 is a mechanical relay that disconnects the neutral line from the heater if the watchdog times out or when the fill tray is removed from the humidifier. -
Page 35: Heater Current Sense Circuit
6/Service Heater Current Sense Circuit The heater current sense circuit consists of L27, JP1, D3, and R6. Alternating current through JP1, which is the heater current line, generates an alternating current in inductor L27. The current from L27 is half wave rectified by diode D3 and applied to load R6. -
Page 36: Membrane Switch Panel Circuit
6/Service Membrane Switch Panel Circuit The touch panel is connected to the control board through connector J6. The touch panel switches the signal lines to ground when the button is depressed. The signal lines are connected directly to the microcontroller. The resistance of the switch is less than 100 ohms. -
Page 37: Error Codes
6/Service Error Codes E1.1 Heater Control Circuit Failure As part of the Power Up Self Tests (PUSTs), a routine checks the function of the solid state relay. This relay controls the heater power. The relay is turned off, and the heat is checked using the heater current sense circuit. -
Page 38: E2.3 Membrane Keypad Failure
6/Service E2.3 Membrane Keypad Failure As part of the OLSTs, a routine tests if any of the switches on the membrane keypad are shorted. If this occurs, this error is displayed. Replace the membrane keypad. If the problem persists, replace the microcontroller. E2.4 Variable Redundancy Error As part of the OLSTs, a routine tests the redundantly stored variables. -
Page 39: Servo-Controlled Humidifier Repair Procedures
6/Service Servo-controlled Humidifier Repair Procedures WARNING The heater is hot enough to cause skin burns. Unplug the humidifier and allow the heater to cool (approximately 30 minutes) before disassembly or cleaning. Valve Housing Disassembly Note: The lid, gasket, heatsink and connector support are not service replaceable parts. -
Page 40: Valve Housing Re-Assembly
6/Service Remove the three screws that secure the valve housing to the heat sink. Note: The housing keeps a spring under compression and removing the screws will release the tension in the spring (spring force is approximately 25 lbs.). Remove the wax motor shaft guide, spring, wax motor shaft, collar and wax motor from the bore in the heat sink. -
Page 41: Humidifier Controller Disassembly/Reassembly
6/Service Make sure the valve is in the closed position, then compress the spring and secure the valve housing to the heat sink with the three screws removed in disassembly. To complete re-assembly reverse steps 1 through 6 in disassembly section. Note: Make sure that the wires are correctly seated in the wire grooves in the gasket. -
Page 42: Humidifier Control/Display Board Removal/Installation
6/Service Turn the humidifier power switch off. Disconnect humidifier power cord. Loosen the two bolts at the bottom of the humidifier controller housing that secure it to the base platform. Lower the controller housing while tilting the bottom of the housing toward you. This will allow the Printed Circuit Boards (PCBs) to clear the bottom of the base platform. - Page 43 6/Service 7. Snap the stain relief off the old humidity sensor cable connector so it will fit through the hole in the base platform in the back of the incubator. Then push the sensor cable connector out the hole. 8. Pull the old humidity sensor assembly out of the incubator by sliding the cable through the hole in the hood.
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Page 44: Sensor Calibration
6/Service Sensor Calibration 1. Turn on the incubator and set the temperature to 30°C in the manual mode. Allow temperature to stabilize. 2. Turn on the humidifier and set the humidity to 75%. Allow the humidity to stabilize. 3. Take the cap off the calibration bottle. Important: In order for the water in the calibration bottle to be completely saturated, most of the salt should remain undissolved. -
Page 45: Valve Checkout
6/Service 13. Turn off the humidifier. 14. Perform the Electrical Safety Check and checkout procedure (section 3). Note: The salt in the calibration bottle may only be used for a period of one year after it's initial mix with water. Valve Checkout Pull out fill tray and verify that the valve is closed. - Page 46 6/Service 6-18 6-18...
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Page 47: 7/Illustrated Parts
7/Illustrated Parts 7/Illustrated Parts Humidifier Lid and Tray Assembly Humidifier seals (pkg 2) ....................6600-0200-800 Screw, 4-40 x 1/2 PHH PNH SS ..................6600-0578-400 Screw, 4-40 x .38 PHH PNH SS ..................6700-0077-400 Connector ........................... 6600-0430-600 Screw, SHLDR PHN M3.5 ....................6600-0524-400 O-ring ........................... -
Page 48: Humidifier Controller Assembly
7/Illustrated Parts Humidifier Controller Assembly 1. Fuse holder ........................6600-0424-600 2. Fuse, time delay T2.0A 5mm x 20mm 250V ............6600-0357-600 3. Card guide .......................... 6600-0517-400 4. Control/Display PCB assembly* 100/120V ..........................6600-0041-850 220-240V ..........................6600-0042-850 5. Housing seal ........................6600-0756-500 6. -
Page 49: Figure 7-2 Humidifier Controller
7/Illustrated Parts Figure 7-2 Humidifier controller... -
Page 50: Humidifier Heat Sink And Valve Assembly
7/Illustrated Parts Humidifier Heat Sink and Valve Assembly 1. Large O-ring........................6600-0527-400 2. Wax motor .......................... 6600-0529-400 3. Collar ............................ 6600-0685-500 4. E-clip ............................. 6600-0588-400 5. Washer ..........................6600-0587-400 6. Wax motor shaft ....................... 6600-0686-500 7. Screw, 4-40 x 1/2 BD RH HD ..................0140-6517-104 8. -
Page 51: Humidifier Rails And Mounting Hardware
7/Illustrated Parts Humidifier Rails and Mounting Hardware 1. Left tray rail ........................6600-0677-500 2. Right tray rail ........................6600-0676-500 3. Screw, 8-32 x 5/8 PHH PNH ..................6600-0523-400 4. Spacer ..........................6600-0521-400 5. Back tray rail assembly (includes reed switch, harness and connector) ................. 6600-0456-700 6. -
Page 52: Humidity Sensor
7/Illustrated Parts Humidity sensor Humidity sensor kit† (includes items 1-5 and cable) ..................6600-0044-850 Shim (holds temp. probe in place) ................6600-0690-500 Foam gasket ........................6600-0852-500 Rear mounting block ...................... 6600-0688-500 Screw, #8 x 1.00 self thd ....................6600-0083-400 Humidity sensor calibration kit† ................6600-0048-850 †Whenever the sensor is replaced it must be re-calibrated. - Page 53 8/Schematics 8/Schematics Figure 8-1 Wiring Diagram Servo-controlled Humidifier...
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Page 54: 8/Schematics
8/Schematics Figure 8-2 Power Supply section of the Control/Display Board Assembly... - Page 55 8/Schematics Figure 8-3 Digital section of the Control/Display Board Assembly...
- Page 56 8/Schematics Figure 8-4 Analog section of the Control/Display Board Assembly...
- Page 57 8/Schematics Figure 8-5 Heater Control section of the Control/Display Board Assembly...
- Page 58 8/Schematics Figure 8-6 Display section of the Control/Display Board Assembly...
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Page 59: Appendix
Appendix Appendix In this section A.1 Specifications ..............................A-1 Electrical ..............................A-1 Performance ..............................A-1 Safety................................A-1 Environmental ............................A-2 EMC ................................A-2 Mechanical ..............................A-2 A.2 Servo-controlled humidifier installation .....................A-3 All specifications are subject to change without notice. A.1 Specifications Electrical Power: 120 V~ 50/60 Hz models, 115 V~ ± 10%, 1.5 Amps Designed to UL544 and CSA 22.2 220-240 V~ 50/60 Hz models, 230 V~ ±... - Page 60 Appendix IEC 601-1 Type B Isolation Mode of Operation: Designed for continuous operation. Protection against ingress of water: Not protected. Leakage Current: < 100µA for 120V models < 500µA for 230V models Self Test: The microprocessor performs self tests and software verification functions when the power is first switched on.
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Page 61: Servo-Controlled Humidifier Installation
Appendix A.2 Servo-controlled Humidifier Installation Important: Before installing the Servo-controlled humidifier, check the part number of your incubator temperature compartment probe. If the part number is not 6600-0495-70X, you must order a new temperare probe before installing the humidifier. Remove the existing humidifier fill tray by sliding it out of the incubator base platform.* Remove the two screws that hold the temperature sensor housing to the back wall of the incubator hood. - Page 62 Appendix 8. Route the cables around the edge of the filter cavity with the humidity sensor cable on the inside (closest to the filter cavity) and the temperature sensor cable on the outside. Insert the humidity sensor cable through the same hole in the base platform that the temperature sensor cable passes through.
- Page 63 Appendix A. Loosen the six mounting screws that secure the humidifier fill tray rails so that you can slide the rails out along their mounting slots. Remove the cable clip that secures the temperature sensor cable underneath the base platform. The rails must drop down 3/16"...
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Page 64: Figure A-4 Power Cord Attachment
Appendix 19. Attach the controller to the base platform by tightening the two mounting bolts at the bottom of the controller housing. Be careful not to over tighten the mounting bolts, since this may damage the power switch. Route all cables through the cut-out in the back of the controller so that they are not pinched between the incubator and the controller housing. -
Page 65: Additional Safety Information
The maximum patient weight is 40 kg (88 lbs). Directives Ohmeda Medical, a division of Datex-Ohmeda, Inc., has declared that this product conforms with the European Council Directive 93/42/EEC Medical Device Directive when it is used in accordance with the in- structions provided in the Operation and Maintenance Manual. - Page 66 Ohmeda or in accordance with written instructions provided by Ohmeda, or altered by anyone other than Ohmeda, or if the Product has been subject to abuse, altered by anyone other than Ohmeda, or if the Product has been subject to abuse, misuse, negligence, or accident.
- Page 68 South Eastern Asia (65) 6277 3444 Care Plus 3000/4000 Ohmeda Medical, 6600-0223-000 Revision ZAB a Division of Datex-Ohmeda, Inc., Operation and Maintenance Manual Language: English a General Electric Company Printed in USA 8880 Gorman Road Copyright 2001 by Datex-Ohmeda, Inc.
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