Service Manual
78 Pages
Preview
Page 1
Table of Contents 1
Service Disclaimer ... 5
2
Introduction ... 5 2.1
3
About the Vivo 30/40 Ventilator... 5 2.1.1 Function... 5 2.1.2 Intended Use ... 5 2.1.3 Design ... 5 2.1.4 Service Personnel’s Training Requirements... 6 2.2 About this Manual ... 6 2.2.1 Scope ... 6 2.2.2 Intended Audience ... 6 2.2.3 Icons ... 6 Maintenance Instructions ... 7 3.1 3.2 3.3
3.4
3.5
3.6
3.7
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Purpose... 7 Service Schedule ... 7 Introduction ... 8 3.3.1 Safety Precautions ... 8 3.3.2 Service Record ... 8 3.3.3 Inspection Equipment and Tools ... 8 3.3.4 Replacement Parts ... 9 Preparing for Inspection ... 9 3.4.1 Initial Recording... 9 3.4.2 Checking additional services ... 9 3.4.3 Inspecting the Markings ... 9 3.4.4 Information from the Patient/User ... 10 3.4.5 Validity of the Documentation ... 10 External Inspection... 10 3.5.1 Visual Inspection for External Damage and Wear... 10 3.5.2 Checking the HA 20 Humidifier (if used) ... 10 3.5.3 Checking the Power Connection ... 10 3.5.4 Inspecting the Patient Circuit... 10 3.5.5 Inspecting the Ventilator Accessories... 10 3.5.6 Changing/Washing the Patient Filters ... 10 3.5.7 Minimum Function Check ... 11 Internal Inspection ... 11 3.6.1 Cleaning the Inside of the Ventilator... 11 3.6.2 Checking the Cables ... 11 3.6.3 Checking the Fastening of Components ... 11 3.6.4 Checking the Power Supply ... 11 3.6.5 Reassembling the Casing ... 11 Complete Function Test ... 12 3.7.1 Checking the Breath Rate and Inspiration Time... 12 3.7.2 Checking the Pressure ... 13 3.7.3 Checking the Tidal Volume Indication ... 13 3.7.4 Preparing the Ventilator for Alarm Checks ... 13
Table of Contents 1 Breas Vivo 30/40 Service Manual
4
3.7.5 Checking the Low Leakage Alarm and High Leakage Alarm ... 14 3.7.6 Checking the High Pressure Alarm ... 14 3.7.7 Checking the Inspiratory Trigger ... 15 3.7.8 Checking the Low Pressure Alarm ... 15 3.7.9 Checking the High Breath Rate Alarm (Vivo 40 only)... 15 3.7.10 Checking the Low Breath Rate Alarm (Vivo 40 only) ... 15 3.7.11 Checking the Low Volume Alarm ... 16 3.7.12 Checking the Audio Pause ... 16 3.7.13 Checking External Battery Operation ... 16 3.7.14 Checking the Internal Battery Operation (Vivo 40 only) ... 16 3.7.15 Adjusting the Settings for the Patient ... 16 3.8 Electrical Safety Precautions ... 17 3.9 Power Failure Alarm Check ... 18 3.9.1 Vivo 30... 18 3.9.2 Vivo 40... 18 Parts Location ... 19 4.1 4.2 4.3 4.4 4.5
5
Parts Drawing 1 – Main Components ... 19 Parts Drawing 2 – Vivo 30 Back Casing, Cables, Screws ... 20 Parts Drawing 3 – Vivo 40 Back Casing, Cables, Screws ... 21 Parts Drawing 4 - Blower Assembly... 21 Parts Drawing 5 – Batteries, Tubings... 22 4.5.1 CPU Boards revision 9 and earlier ... 22 4.5.2 CPU Boards revision 10 and later ... 23 4.6 Parts Drawing 6 – Vivo 30 Front Casing ... 24 4.7 Parts Drawing 7 – Vivo 40 Front Casing ... 25 4.8 Parts List for the Vivo 30 and Vivo 40 ... 26 Functional Diagrams ... 32
6
5.1 Vivo 30/40 with magnetic valve (CPU board rev 9 and earlier) ... 32 5.2 Vivo 30/40 without magnetic valve (CPU board rev 10 and later) ... 34 5.3 Filtering/Smoothing Techniques ... 35 5.4 Vivo 30/40 Measuring and Display Devices... 35 Opening the Vivo 30/40 and Replacing the Main Components ... 36
7
6.1 Opening the Vivo 30/40 ... 36 6.2 Replacing the Complete Blower Assembly ... 37 6.3 Replace the PSU Board ... 40 6.4 Replace the PSU Cooling Fan ... 42 6.5 Replace the CPU Board... 43 6.6 Replace the Clock Battery... 45 6.7 Replace the Alarm Battery ... 46 6.8 Replacing the Push Button Silicone Pad... 47 Upgrade and Calibration ... 48
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8
7.1 Firmware Upgrade ... 48 7.2 Pressure and Flow Calibration ... 48 Electronics ... 49 8.1 8.2
9
Main Cabling Diagram of the Vivo 30/40... 49 Circuit Board Descriptions... 50 8.2.1 PSU Board ... 50 8.2.2 CPU Board ... 52 8.3 Test Points – CPU board... 54 8.3.1 Test Point Locations ... 54 8.3.2 Test Point Matrix ... 55 8.4 Ventilator Switch-over Operating Voltages... 57 8.4.1 Mains Power Supply Operation ... 57 8.4.2 External Battery Operation ... 57 8.4.3 Internal Battery Operation (Vivo 40 only) ... 58 8.5 Checking the Internal Battery (Vivo 40 only)... 58 Fault Tracing ... 59 9.1 9.2
10
Fault Tracing Table... 59 Function Failure Error Codes ... 60 9.2.1 Reading the Error Codes... 60 9.2.2 Error Code Table ... 60 Appendices ... 66 10.1
10.2 10.3 10.4
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Emission and Immunity Declaration... 66 10.1.1 Guidance and Manufacturer's Declaration – Electromagnetic Immunity ... 66 10.1.2 Notes ... 67 10.1.3 Guidance and Manufacturer's Declaration – Electromagnetic Emission ... 67 10.1.4 Notes ... 68 Service Record Vivo 30/40... 69 Returning Products to Breas ... 71 Product Return Form – Breas Vivo 30/40 ventilator... 72
Table of Contents 3 Breas Vivo 30/40 Service Manual
4 Table of Contents Breas Vivo 30/40 Service Manual
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1
Introduction This chapter gives an overview of the Vivo 30/40 ventilator and this service manual. WARNING!
This product must be: •
Subjected to regular service, maintenance and control and any applicable upgrades, in accordance with Breas service instructions.
•
Repaired and/or modified in accordance with Breas service manuals, technical bulletins, and any special service instructions, by service technicians that have been authorised after the Breas Vivo 30/40 service training.
Deviation from these service instructions may lead to risk of personal injury!
1.1
About the Vivo 30/40 Ventilator
1.1.1
Function
The Vivo 30/40 is a pressure-supported and pressure-controlled ventilator for patients who require intermittent support by mechanical ventilation. It has three modes of operation: PSV, PCV, and CPAP. The PSV and PCV modes have an adjustable trigger sensitivity setting which allows the patient to initiate ventilator-assisted breaths. In the PCV mode (Pressure Controlled Ventilation), the ventilator provides assisted or controlled pressure-regulated breathing. In the PSV mode (Pressure Support Ventilation), the ventilator’s expiratory sense can also be adjusted allowing the ventilator to more easily match each patient’s needs. In the CPAP mode (Continuous Positive Airway Pressure), the ventilator provides a continuous positive airway pressure. The logs of the Vivo 30/40 can be downloaded to a PC, printed out, and analysed via the Vivo 30/40 PC Software. For more information about the Vivo 30/40 PC Software, please contact your Breas representative. 1.1.2
Intended Use
For a detailed description on intended use, refer to the Vivo 30/40 Clinician's or User Manuals.
1.1.3
Design
The Vivo 30/40 is constructed around a blower assembly. An electronically controlled stepmotor rotates a valve to control the pressure. A microprocessor controls the correct speed of the blower motor and its power supply by means of calculations based on the settings for pressure, rate, inspiration time, etc. The pressure and trigger settings are monitored at the same time.
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Introduction 5 Breas Vivo 30/40 Service Manual
1.1.4
Service Personnel’s Training Requirements
Service personnel working with the Vivo 30/40 should have medical/technical training and a good knowledge of the construction and function of respiratory devices. Authorisation by Breas after Vivo 30/40 service training is mandatory. Always contact your Breas representative if you have any questions or if any training is required.
1.2
About this Manual
1.2.1
Scope
This manual describes all the routine maintenance checks and the additional service actions for the Vivo 30/40. The manual contains all the documentation that is required for the maintenance and the service of the ventilator, such as replacement parts lists, exploded drawings, wiring diagrams, component location guides, etc. Breas Medical AB reserves the right to make changes to the products and/or the contents of this manual without any prior notice. 1.2.2
Intended Audience
This service manual is intended for service technicians who have medical/technical training and who have a good knowledge of the construction and function of respiratory devices. Authorisation by Breas after Vivo 30/40 service training is mandatory. Always contact your Breas representative if you have any questions or if any training is required. The service manual is not intended for clinical personnel or patients, who will find all the information they need in the Vivo 30/40 Clinician's and User Manual. 1.2.3
Icons
In this manual, icons are used to highlight specific information. The meaning of each icon is explained in the table below. ICON
EXPLANATION
Warning! Risk of death and serious personal injury. Caution! Risk of minor or moderate injury. Risk of equipment damage, loss of data, extra work, or unexpected results. Note Information that may be valuable but is not of critical importance, tips. Reference Reference to other manuals with additional information on a specific topic.
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2
Maintenance Instructions This chapter describes all the routine maintenance checks and additional service instructions for the Vivo 30/40. WARNING!
This product must be: •
Subjected to regular service, maintenance and control and any applicable upgrades, in accordance with Breas service instructions.
•
Repaired and/or modified in accordance with Breas service manuals, technical bulletins, and any special service instructions, by service technicians that have been authorized after Breas Vivo 30/40 service training.
Deviation from these service instructions may lead to risk of personal injury! The patient and care provider should follow the checks that are described in the Vivo 30/40 User and Clinician's Manual.
2.1
Purpose The Vivo 30/40 is designed to give users many years of trouble-free breathing assistance, provided that the preventive maintenance is carried out at the intervals specified in this manual. Well-performed maintenance services will considerably increase the expected lifetime of the ventilator. It is also important that any peripheral equipment is checked at the same time as the services are carried out.
2.2
Service Schedule The maintenance service includes all the checks listed in the schedule below. A complete maintenance service (as described in this chapter) must be carried out at least every 12 months.
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INTERVAL
SERVICE CHECK
SECTION
Every 12 months
Perform external inspection. Perform a complete function test.
2.5 2.7
Every 2 years
Change the internal battery kit (Vivo 40 only).
5.1
Every 5 years
Change the clock battery. Change the alarm battery. Perform an internal inspection. Check the power failure alarm.
5.6 5.7 2.6 2.9
Every 20,000 total operating hours
Change the complete blower assembly. Perform an internal inspection.
5.2 2.6
Maintenance Instructions 7 Breas Vivo 30/40 Service Manual
2.3
Introduction Before you start a maintenance service, read the safety precautions and make sure you have a new service record and all the necessary equipment, tools, and replacement parts at hand.
2.3.1
Safety Precautions
Follow the safety precautions below when working with the Vivo 30/40: • Do not work on the ventilator with the casing removed and the power supply connected, unless the instructions in this manual clearly says so. • Always use caution when working with the ventilator connected to the mains and the casing removed. • Do not use explosive gases and/or fluids near the ventilator. • Make sure that all precautions to prevent electrostatic discharge (ESD) have been taken. Follow all regulations regarding ESD. The Vivo 30/40 User and Clinician's Manuals contains extended lists of safety precautions.
2.3.2
Service Record
The Breas service record is found in chapter 9 “Appendices”. Copy the service record and use it for noting the service checks while performing the yearly service. 2.3.3
Inspection Equipment and Tools
Before starting the service of the Vivo 30/40, make sure you have the following equipment at hand: •
Test lung or reservoir bag (for example Breas part no 001917).
•
Measuring instrument for tidal volume and minute volume/rate (ventilator tester, spirometer, or equivalent, for example Fluke VT Plus).
•
Pressure manometer Breas part no 001937).
•
Digital voltmeter.
•
Standard toolkit containing screwdrivers, including small potentiometer screwdriver, and Torx keys, TX 10 and TX 20.
•
Vivo to PC communication cable, Breas part no 003588.
•
Vivo 30/40 Service Software (compatible with Fluke VT Plus, Thommen HM 28 and TSI 4040), available for download from Breas Extranet. Contact Breas technical support for more information.
•
Vivo Training CD, Breas part no 004278.
•
External battery (24 or 12 V, for example Breas EB 2).
•
Flow meter (for example TSI 4040).
•
Test connector kit, Breas part no 004829 (connectors and leakageports used when testing).
8 Maintenance Instructions Breas Vivo 30/40 Service Manual
(for
example
Thommen HM 28
digital
manometer,
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2.3.4
Replacement Parts
The following replacement parts should be available when servicing the ventilator: DESCRIPTION
PART NO.
Patient air filter, grey, washable
003563 (5 pcs)
Patient air filter, white, disposable
003564 (5 pcs)
If required: Internal battery kit (Vivo 40)
003452
Alarm battery, NiMH 4.8 V, 70 mAh Clock battery, CR 2032
004007
Blower assembly kit for replacement after a total operating time of 20,000 hours
003524
2.4
Preparing for Inspection
2.4.1
Initial Recording 1 Copy a new service record (see “Service Record Vivo 30/40” on page 69). 2 Identify the Vivo 30 or Vivo 40. 3 Note the model and serial number and any inventory number on the service record. 4 Check any comments recorded on the previous service records. 5 Document the current patient settings.
2.4.2
Checking additional services 1 Note the number of Total operating hours on the service record.
The operating hours are found at the “Device information” screen. Access the “Device information” using the menu as described in the Vivo 30/40 Clinician’s Manual. 2 Check the service schedule to see whether the alarm/clock batteries, the internal battery kit
(Vivo 40 only), or the complete motor assembly needs to be replaced. 2.4.3
Inspecting the Markings
Make sure that all markings on the ventilator’s information labels can be read:
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•
Model description, serial number
•
Warning texts
•
Any inventory marking
•
Any other texts
Maintenance Instructions 9 Breas Vivo 30/40 Service Manual
2.4.4
Information from the Patient/User
Check the following with the patient:
2.4.5
•
Has the ventilator functioned without any problems? If not, what were they?
•
How does the patient/care provider check the function of the ventilator? How often?
•
How often is the filter replaced?
•
How many filters will be required before the next service?
•
Other observations?
Validity of the Documentation 1 Check the validity of the User or Clinician’s Manual enclosed with the ventilator. 2 Check if any modification or upgrading of the ventilator needs to be done at the same time as
the service.
2.5
External Inspection
2.5.1
Visual Inspection for External Damage and Wear 1 Clean the outside of the ventilator using a mild soap solution. 2 Check for any visible damage to the casing and the other components. 3 Check that nothing has become loose. 4 Check that the rear lid is connected properly to the ventilator.
2.5.2
Checking the HA 20 Humidifier (if used) 1 Remove and open the HA 20. 2 Check that there is no visible damage. 3 Check that the water container is clean. 4 Check that the heating unit is connected properly to the ventilator.
2.5.3
Checking the Power Connection 1 Check the plugs on the power cord, the cord itself, and the ventilator’s power socket. 2 Make sure that the strain-relief clamp for the power cord is not damaged. 3 Inspect the external battery cable, if used. 4 Check the external battery socket in the ventilator.
2.5.4
Inspecting the Patient Circuit
Inspect the patient circuit and replace it if necessary. 2.5.5
Inspecting the Ventilator Accessories
Check any other accessories that are used with the ventilator. 2.5.6
Changing/Washing the Patient Filters 1 Change the white air filter. 2 Change the grey filter, if necessary. 3 Make sure the patient has enough filters to last until the next service.
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2.5.7
Minimum Function Check 1 Connect the power cord. 2 Connect the patient circuit. 3 Switch on the ventilator and make sure it operates normally.
2.6
Internal Inspection Always perform an internal inspection after having opened the Vivo 30/40. Make sure to disconnect the power supply before opening the casing of the ventilator.
2.6.1
Cleaning the Inside of the Ventilator 1 Open the casing. See “Opening the Vivo 30/40 and Replacing the Main Components” on page 36 for instructions. 2 Remove any dirt or dust that has collected in the ventilator.
2.6.2
Checking the Cables
Inspect all the cables and their connectors. Check the front and rear panels to make sure that the cables and the wires are not pinched or kinked. 2.6.3
Checking the Fastening of Components
Make sure that all the components, such as the blower assembly, the circuit boards and the connectors are securely fastened. 2.6.4
Checking the Power Supply 1 Make sure that the power connector is undamaged and that it is securely in place. 2 Check the wiring to the CPU board. 3 Check that the PSU cooling fan is securely in place.
2.6.5
Reassembling the Casing
See “Opening the Vivo 30/40 and Replacing the Main Components” on page 36 for instructions.
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Maintenance Instructions 11 Breas Vivo 30/40 Service Manual
2.7
Complete Function Test You can also perform the complete function test using the Vivo 30/40 Service Software. To perform a complete function test, all tasks in this section need to be completed in the written order.
2.7.1
Checking the Breath Rate and Inspiration Time
1 Adjust the settings as follows:
SETTING
VALUE
Mode
PCV
Target Volume
Inactive
IPAP
20 cmH2O
EPAP
4 cmH2O
Set Rate
10 bpm
Inspiration Time
3.0 s
Rise Time
3
Inspiration Trig
3
2 Connect a pressure/flow meter and test lung or a reservoir bag to the ventilator. Leakage 4 mm hole
Pressure/flow meter
Test lung
3 Measure and check that the measured values for rate and inspiration time are correct
(tolerance ±10%).
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2.7.2
Checking the Pressure
1 Adjust the settings as follows:
SETTING
VALUE
Mode
PCV
IPAP
4 cmH2O
EPAP
2 cmH2O
Inspiration Time
5.0 s
2 Connect a pressure manometer or ventilator tester to the ventilator.
3 Measure and check that the measured IPAP value for each pressure is correct.
EPAP
IPAP
TOLERANCE
5 cmH2O
10 cmH2O
±1.8 cmH2O
10 cmH2O
20 cmH2O
±2.8 cmH2O
15 cmH2O
30 cmH2O
±3.8 cmH2O
If the measured pressure values are not within tolerance, perform a pressure calibration/adjustment of the ventilator (see “Pressure and Flow Calibration” on page 48). 2.7.3
Checking the Tidal Volume Indication
1 Adjust the settings as follows:
SETTING
VALUE
Mode
PCV
IPAP
30 cmH2O
EPAP
4 cmH2O
Set Rate
8 bpm
Inspiration Time
5.0 s
2 Connect a ventilator tester to the ventilator. 3 Measure and check that the measured value for volume is correct (tolerance ±20%).
If the measured volume value is not within tolerance, perform a volume calibration/adjustment of the ventilator (see “Pressure and Flow Calibration” on page 48). 2.7.4
Preparing the Ventilator for Alarm Checks 1 Connect the ventilator to the mains power supply and switch it on by pressing the On/Off button on the side panel. The ventilator should be in stand-by mode (not operating) and the mains LED on the front panel should be lit.
Do not connect the patient circuit.
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Maintenance Instructions 13 Breas Vivo 30/40 Service Manual
2 Adjust the settings as follows:
2.7.5
SETTING
VALUE
Mode
PCV
IPAP
14 cmH2O
EPAP
2 cmH2O
Set Rate
10 bpm
Inspiration Time
1.5 s
Rise Time
4
Inspiration Trig
Off
Low Pressure Alarm
2 cmH2O
Low Volume Alarm
0.05 l
High Breath Rate Alarm (Vivo 40 only)
Off
Low Breath Rate Alarm (Vivo 40 only)
4 bpm
Checking the Low Leakage Alarm and High Leakage Alarm 1 Connect a test lung or a reservoir bag to the ventilator. Leakage 4 mm hole
Test lung
2 Enter operating mode by switching the ventilator on with the Start/Stop button. 3 Block the leakage hole.
The low leakage Alarm shall occur within 60 seconds. 4 Disconnect the hose from the air outlet. The low leakage Alarm shall disappear and the high leakage alarm shall occur within 30 seconds. 2.7.6
Checking the High Pressure Alarm 1 Enter stand-by mode by switching the ventilator off with the Start/Stop button. 2 Connect a patient circuit to the ventilator. 3 Enter operating mode by switching the ventilator on with the Start/Stop button. 4 Create pressure towards the ventilator by blowing air into the mask or patient tube.
The high pressure alarm shall be activated after 3 consecutive high pressure breaths.
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2.7.7
Checking the Inspiratory Trigger 1 Set the inspiratory trigger to 3. 2 Create a spontaneous breath (inspiratory flow) and make sure a triggered breath is given.
The green Inspiratory Trigger (T) LED shall be lit. 2.7.8
Checking the Low Pressure Alarm 1 Enter stand-by mode by switching the ventilator off with the Start/Stop button. 2 Connect the patient circuit to a test lung (<1.5 l) and a leakage connector.
3 Adjust the settings as follows:
SETTING
VALUE
IPAP
12 cmH2O
Low Pressure Alarm
10 cmH2O
4 Enter operating mode by switching the ventilator on with the Start/Stop button. 5 Adjust the IPAP to 5 cmH2O.
The low pressure alarm shall occur within 30 seconds. 6 Adjust the IPAP to 12 cmH2O again. The low pressure alarm shall disappear. 2.7.9
Checking the High Breath Rate Alarm (Vivo 40 only)
1 Adjust the settings as follows:
SETTING
VALUE
IPAP
15 cmH2O
EPAP
10 cmH2O
Set Rate
20 bpm
High Breath Rate Alarm
10 bpm
The high breath rate alarm shall occur within 30 seconds. 2 Adjust the set rate to 5 bpm.
The high breath rate alarm shall disappear within 30 seconds. 2.7.10 Checking the Low Breath Rate Alarm (Vivo 40 only)
1 Adjust the settings as follows:
SETTING
VALUE
Set Rate
5 bpm
High Breath Rate Alarm
Off
Low Breath Rate Alarm
15 bpm
The low breath rate alarm shall occur within 30 seconds. 2 Adjust the set rate to 20 bpm.
The low breath rate alarm shall disappear in 30 seconds.
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Maintenance Instructions 15 Breas Vivo 30/40 Service Manual
2.7.11 Checking the Low Volume Alarm
1 Adjust the settings as follows:
SETTING
VALUE
Low Volume Alarm
2.0 l
The low volume alarm shall occur within 20 seconds. 2 Adjust the low volume alarm to 0.05 l.
The low volume alarm shall disappear within 30 seconds. 2.7.12 Checking the Audio Pause 1 Switch on the ventilator. Disconnect the patient circuit.
The low pressure alarm shall occur in 15 seconds. 2 Press the audio pause button and make sure the audible alarm is paused. 3 Check that the audible alarm starts again after approximately 1 minute. 2.7.13 Checking External Battery Operation 1 Start the ventilator. 2 Connect an external battery to the ventilator. 3 Disconnect the mains power cord while the ventilator is running. 4 Check that the ventilator automatically switches over to external battery operation.
The following shall occur: •
A short audible alarm sounds (Vivo 30 only).
•
The message “Changed Power Source Switched to External Battery” is shown in the display.
•
The power source LED is changed to external DC.
5 Reconnect the power cord and check that the power source LED is changed to mains. 2.7.14 Checking the Internal Battery Operation (Vivo 40 only) 1 Start the ventilator. 2 Disconnect any external battery from the ventilator. 3 Disconnect the mains power cord while the ventilator is running. 4 Check that the ventilator automatically switches over to internal battery operation.
The following should occur: •
A short audible alarm sounds.
•
The message “Changed Power Source Switched to Internal DC” is shown in the display.
•
The power source LED is changed to internal DC.
5 Reconnect the power cord and check that the power source LED is changed to mains. 2.7.15 Adjusting the Settings for the Patient
Adjust the settings as prescribed for the patient.
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2.8
Electrical Safety Precautions Electrical safety measurements must be made in accordance with IEC 601. Use an automatic electrical safety tester to make the measurements. All tests must be performed in accordance with class II type BF. Supply Voltage Note the power voltage reading. The voltage must be noted at each service check, as the currents measured are directly in relation to the supply voltage. This allows all measurements made on the same ventilator to be compared with measurements made on different occasions. Insulation The insulation resistance is measured using a 500 V DC power supply. The most suitable method is to connect the plus lead to the two ventilator power socket pins, and the minus lead to the casing or the patient air connector. The measurements made during the delivery inspection can be used as reference values for measurements made during future services. If no reference values are available, the value for the insulation resistance should be >20 MΩ . Leakage Currents The leakage currents are measured at different parts of the ventilator using an RC circuit to earth. Make the measurements partly at normal case (NC) and at the single fault condition (SFC). Reverse the polarity of the power supply and note the highest value. Leakage currents to earth must not exceed the stated limit values. Leakage Currents from the Casing The leakage current of the casing is measured at an unpainted point, for example, the head of a screw. Limit values:
NC <0.1 mA SFC <0.5 mA
Break neutral for SFC. Patient Leakage Currents The patient leakage current is measured between the patient connector and earth. Limit values:
NC <0.1 mA SFC <0.5 mA
Break neutral for SFC. Leakage Currents with Mains Power Supply at the Patient-connected Part This test must be done using an automatic electrical safety tester with this function. See the safety instructions for the tester. Limit value: SFC <5 mA
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Maintenance Instructions 17 Breas Vivo 30/40 Service Manual
2.9
Power Failure Alarm Check
2.9.1
Vivo 30 1 Start the Vivo 30 with the power cord connected. 2 Disconnect the power cord.
The power failure alarm shall occur immediately. 2.9.2
Vivo 40 1 Remove the internal battery as in “Opening the Vivo 30/40” on page 36, 1-2. 2 Start the Vivo 40 with the power cord connected. 3 Disconnect the power cord.
The power failure alarm shall occur immediately.
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3
Parts Location This chapter contains part-number lists and drawings of the parts for the ventilator.
3.1
Parts Drawing 1 – Main Components Accessory: Humidifier HA 20
7 (Vivo 30) 8 (Vivo 40)
9
5
14
3-1(4x) 2-5 (2x) Vivo 30
3-4 (2x)
Vivo 40
13
16 (Vivo 30) 17 (Vivo 40)
10 (Vivo 40 only)
For definitions of the part numbers, refer to the parts list in section 3.8, "Parts List for the Vivo 30 and Vivo 40", on page 26.
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Parts Location 19 Breas Vivo 30/40 Service Manual
3.2
Parts Drawing 2 – Vivo 30 Back Casing, Cables, Screws 9-1
9
9-3 9-4
1-3
2-4 (2x)
2-5
20-2 (2x) 20-1
19 21
2-8 (2x) 2-2
16
18
2-6
2-9 2-7 1-2
4-10 4-11
1-1
For definitions of the part numbers, refer to the parts list in section 3.8, "Parts List for the Vivo 30 and Vivo 40", on page 26.
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