AUTO Logic 110, 200 and AURA Logic Service Manual Issue 2 March 2004

Auto Logic 110/200 & Aura Logic Service Manual

Contents

CONTENTS CHAPTER 1 Introduction... 1 About This Manual... 1 Numbering and Cross-Referencing in this Manual... 1 Warnings, Cautions and Notes... 1 General Warnings... 1 General Description... 1 Pump (Refer to Figure 1)... 3 Auto Logic 110 Mattress Overlay (Refer to Figure 2)... 3 Auto Logic 200 Mattress Replacement (Refer to Figure 2)... 4 Aura Logic Seat Cushion (Refer to Figure 4)... 4 Operating Principle... 7 Pump... 7 Alarms and Indicators (Refer to Figure 8)... 8 Replacement Sub-Assembly Calibration... 8 Pressure Transducer Calibration... 8 Battery on the Control PCB Assembly... 9 Mattress Overlay Core... 9 Mattress Base Pad... 9 Seat Cushion... 10 Auto-Recognition System... 10 System Start Up Sequence (Refer to Figure 8)... 10

CHAPTER 2 Troubleshooting... 1 Controls, Alarms and Indicators (Refer to Figure 10)... 1 Diagnosing Faults... 1 Diagnosing Faults using a Troubleshooting Table... 2 Diagnosing Faults using the Event Logs on the Communicator Software... 4 Checking for Self Set Technology (SST) Errors... 6 Checking if the Pump is due for a Routine Service... 6 Checking for SST Errors... 7 Diagnosing Pump Faults using the Built-In Self-Test Routine with no PC... 9 Checking the Status and Diagnosing Faults on the Intelligent Battery Pack... 11 General... 11 To Check the Battery Pack Status (Refer to Figures 14 and 15)... 12 Battery Pack “Conditioning” Fault... 13

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Battery Pack Disposal... 13

CHAPTER 3 Maintenance... 1 Pump Service... 1 Pump Maintenance Checks... 2 Mattress Replacement and Mattress Overlay Service... 2 Mattress Replacement and Mattress Overlay Maintenance Checks... 3 Seat Cushion Service... 3 Seat Cushion Maintenance Checks... 3

CHAPTER 4 Testing... 1 Pump Control Panel... 1 Test Equipment... 1 Checking the Basic System Operation... 2 Checking the Pump Pressures without a Computer... 2 Connecting the Pump to a Personal Computer (PC)... 5 Laptop / Desktop PC... 5 Computer Communication... 5 Running the Communicator Software... 6 Executing Commands and Test Sequences on the Command Menu... 10 Executing Single Commands... 10 Executing Test Sequences... 11 Operating the Pump from a PC via the IR Interface Module... 12 Closing the Communicator Software... 13 Checking the Pump Pressures and Free Flows with a Computer... 14 Checking the Calibration of the Pressure Transducer... 17 Re-Calibrating the Pressure Transducer and Verifying the Pressures... 19 Checking the Software Version of the Pump... 19 Re-Calibrating the Pressure Transducer... 19 Verifying the Pressures... 21 Making Fine Adjustments to the Transducer Calibration... 21 End of Test... 21 Setting the Service Hours on the Pump... 22 Checking the Sounder and Power Fail Alarm LED Indicators... 23 Setting Up a New Control PCB Assembly... 24 Setting the GMT Time and Date... 25 Pressure Logging using the Communicator Software... 26

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Electrical Safety Testing... 28 Electrical Safety Checks - Class II (Double Insulated)... 28 Insulation Resistance Test... 28 Dielectric Strength Test (Flash Test)... 28 Leakage Circuit Test (USA)... 28 Inflation Test of the Mattress Replacement, Overlay or Seat Cushion... 29 Test Procedure... 29

CHAPTER 5 Pump Repair... 1 General... 1 Pump Repair to Testing Requirements... 1 Removing the Mains/Power Cordset... 3 Installing the Mains/Power Cordset... 3 Removing the Air Inlet Filter... 3 Installing the Air Inlet Filter... 3 Removing the Rear Case... 5 Installing the Rear Case... 5 Removing the Hooks... 7 Installing the Hooks... 7 Removing the Manifold Assembly... 9 Installing the Manifold Assembly... 9 Replacing the RFID (Radio Frequency Identification) Coil Antenna... 13 Removing the Silencer Bag Assembly... 14 Installing the Silencer Bag Assembly... 14 Replacing the O-Rings on the Manifold Assembly... 15 Removing the Compressor Assembly and Mounting Bracket... 17 Installing the Compressor Assembly and Mounting Bracket... 17 Removing the Compressor Assembly from the Mounting Bracket... 19 Installing the Compressor Assembly onto the Mounting Bracket... 19 Replacing the Compressor Assembly... 21 Removing the Power Supply PCB (Printed Circuit Board) Assembly... 23 Installing the Power Supply PCB (Printed Circuit Board) Assembly... 23 Removing the Control PCB (Printed Circuit Board) Assembly... 25 Installing the Control PCB (Printed Circuit Board) Assembly... 25 Removing the PCB Mounting Pillars... 25 Installing the PCB Mounting Pillars... 25 Replacing the Battery on the Control PCB Assembly... 26 Pump Labels... 27

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Replacing the Mains/Power Fuses on the Power Supply PCB Assembly... 29 Replacing the Air Inlet Filter on the Compressor Assembly... 29 Removing the Membrane Label... 31 Installing the Membrane Label... 31 Replacing the Rear Case... 33 Replacing the Front Case... 35

CHAPTER 6 Mattress Overlay Repair... 1 General... 1 Removing the Top Cover Assembly... 2 Installing the Top Cover Assembly... 2 Removing a Cell Assembly... 5 Installing a Cell Assembly... 7 Removing the Manifold Tube Assembly... 9 Installing the Manifold Tube Assembly... 9 Replacing the Non-Return Valves... 11 Replacing the Partial Non-Return Valve Assembly at the Head End of the Mattress . . . 11 Replacing the Non-Return Valve at the Foot End of the Mattress... 11 Removing the Low-Air-Loss (LAL) Patch Tube Assembly... 12 Installing the Low-Air-Loss (LAL) Patch Tube Assembly... 12 Separating the Mattress Overlay from the Mattress Base Pad... 15 Attaching the Mattress Overlay to the Mattress Base Pad... 15 Removing the Pump Tubeset Assembly... 17 Installing the Pump Tubeset Assembly... 17 Removing the CPR Assembly... 18 Installing the CPR Assembly... 18 Removing the Manifold Connector Assembly from the Mattress Overlay... 18 Installing the Manifold Connector Assembly onto the Mattress Overlay... 18 Removing a Retaining Strap Assembly... 19 Installing a Retaining Strap Assembly... 19 Replacing the Base Sheet Assembly... 20 Press Stud Replacement... 21

CHAPTER 7 Mattress Base Pad Repair... 1 General... 1 Removing the Manifold Connector Assembly from the Mattress Base Pad... 3 Installing the Manifold Connector Assembly onto the Mattress Base Pad... 3

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Replacing the Draw Latches on the Manifold Connector Assembly... 3 Removing a Retaining Strap Assembly... 5 Installing a Retaining Strap Assembly... 5 Replacing the Base Pad Sub-Assembly... 5 Press Stud Replacement... 5

CHAPTER 8 Seat Cushion Repair... 1 General... 1 Removing the Top Cover Assembly... 1 Installing the Top Cover Assembly... 1 Removing the Welded Cell Assembly... 3 Installing the Welded Cell Assembly... 3 Removing the Pump Tubeset Assembly... 4 Installing the Pump Tubeset Assembly... 4 Removing a Retaining Strap Assembly... 4 Installing a Retaining Strap Assembly... 4 Replacing the Base Assembly... 6

CHAPTER 9 Intelligent Battery Pack Assembly... 1 General... 1 Installing and Removing the Battery Pack... 1 Checking the Status of the Battery Pack... 2 Battery Pack Status Label... 2 To Check the Battery Pack Status (Refer to Figures 75 and 76)... 2 Battery Pack Storage... 2 Battery Pack Disposal... 2 Recharging the Battery Pack... 3

CHAPTER 10 Patient Handset... 1 General... 1 Connecting the Patient Handset to the Pump... 1 Disconnecting the Patient Handset... 2

CHAPTER 11 Installing and Running the Communicator Software... 1 General... 1

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Auto-Installing the Communicator Software... 1 Manually Installing the Communicator Software... 2 Main Installation Process for the Communicator Software... 3 Running the Communicator Software... 7

CHAPTER 12 Technical Specification... 1 Auto Logic / Aura Logic Pump... 1 Intelligent Battery Pack... 3 Auto Logic 110 - Mattress Overlay... 3 Auto Logic 200 - Mattress Replacement... 4 Aura Logic - Seat Cushion... 4

CHAPTER 13 Parts List... 1 General... 1 Overall Assembly Parts List... 1 Pump Assembly Parts List... 2 Mattress Overlay Assembly Parts List... 5 Mattress Base Pad Assembly Parts List... 6 Seat Cushion Assembly Parts List... 6 Intelligent Battery Pack Assembly... 7 Test Equipment... 7

CHAPTER 14 Service Contact Details... 1

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Introduction

CHAPTER 1 INTRODUCTION 1

About This Manual

Huntleigh Healthcare strongly recommend that their equipment is only serviced by trained personnel and provide courses for customers who wish to become licensed to service their own equipment. In no event will Huntleigh Healthcare be responsible for any service performed by customers or third parties. This manual contains information on maintenance, servicing, repair, troubleshooting and testing for the Auto Logic™ 110, Auto Logic™ 200 and Aura Logic™ systems which comprise a pump and either a mattress overlay, mattress replacement or seat cushion respectively. Read and understand this manual before attempting to service or repair the equipment.

Numbering and Cross-Referencing in this Manual For all chapters in this manual: •

Page, section and paragraph numbering re-start at “1”.

•

Figure and table numbering continue from the previous chapter.

•

Cross-references which include a chapter number (and/or chapter title) refer to text in a different chapter. Cross-references which do NOT include any chapter number (or chapter title) refer to text within the same chapter.

Warnings, Cautions and Notes WARNINGS given in this manual identify possible hazards in procedures or conditions which, if not correctly followed, could result in death, injury or other serious adverse reactions. CAUTIONS given in this manual identify possible hazards in procedures or conditions which, if not correctly followed, could result in equipment failure or damage. Notes given in this manual are used to explain or amplify a procedure or condition.

General Warnings WARNING: BEFORE PERFORMING ANY SERVICE OR MAINTENANCE PROCEDURES, ENSURE THAT THE EQUIPMENT HAS BEEN ADEQUATELY DECONTAMINATED. WARNING: VOLTAGES IN EXCESS OF 30 VOLTS RMS OR 50 VOLTS DC CAN, IN CERTAIN CIRCUMSTANCES, BE LETHAL. WHEN WORKING ON EQUIPMENT REQUIRING EXPOSURE TO LIVE, UNPROTECTED CONDUCTORS WHERE SUCH VOLTAGES ARE PRESENT, EXTREME CARE MUST BE EXERCISED.

2

General Description

The Auto Logic 110, Auto Logic 200 and Aura Logic systems are automatic alternating pressure relief systems to aid the prevention, treatment and management of pressure ulcers: •

The Auto Logic 110 system comprises a pump and a mattress overlay. The mattress overlay is designed to be placed on top of any standard mattress.

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Power and Alarm Indicators

Control Panel

Mains/Power Cordset

Hanging Brackets

Patient Handset Socket

Figure 1 - Pump

Top Cover Head End of Mattress

Mattress Overlay (Core) Cable Management

Cells

CPR Unit

Corner Straps

Pneumatic Connection Pump Connector

Tubeset

Securing Straps

Mattress Base Pad

Figure 2 - Mattress Overlay and Replacement

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•

The Auto Logic 200 system comprises a pump and a mattress replacement. The mattress replacement is designed to replace the standard mattress on a bed, and comprises a mattress overlay on top of a mattress base pad. The mattress overlay is similar to that on the Auto Logic 110 system, but has two extra zips to secure the mattress base pad to it.

•

The Aura Logic system comprises a pump and a seat cushion. The seat cushion is designed to be placed on top of any standard chair.

All three systems are designed to operate in either Alternating mode, which continuously changes the tissue pressure points providing a high degree of pressure relief, or Constant Low Pressure (CLP) mode, which provides a constant low pressure reduction and is used when a moving surface is contraindicated for the patient.

Pump (Refer to Figure 1) The pump provides a dynamic system of inflating the support surface underneath the patient, cycling every 10 minutes to produce periods of pressure relief for the whole body. The single compressor pump has microprocessor-aided control and alarm functions, and has LED indications on the front case of the pump and the control panel on top of the pump. An optional intelligent battery pack is available which allows the pump to be used independently of the mains/power supply. The battery pack slides onto the base of the pump, and recharges itself when the pump is operating from the mains/power supply. A patient handset is an optional extra, and plugs into a socket on the side of the pump. It gives the patient control over the comfort settings of the mattress and also enables the patient to mute the alarm. The Auto Logic systems do not have a pressure sensor pad in the mattress. Instead, the pump incorporates Self Set Technology (SST), which adjusts the air pressure within the mattress every 10 minutes in Alternating mode and 20 minutes in Constant Low Pressure (CLP) mode to suit the Body Mass Index (BMI) and position of the patient.

Auto Logic 110 Mattress Overlay (Refer to Figure 2) The mattress overlay comprises a mattress core of 20 individual cells which support the patient (Refer to Figure 3). 17 of the cells inflate alternately, and the remaining 3 are static cells to support the patient’s head. The 10 light blue alternating cells in the centre of the mattress core incorporate two small cells at either end of the main cell. These “cells-in-cell” are kept at a constant pressure and help the transfer of patients on and off the bed by keeping the edges of the mattress firm. The remaining 10 cells (5 at each end of the mattress) are dark blue. The mattress core incorporates a low-air-loss patch under the cells to provide a constant bleed of air for additional patient comfort. A CPR (Cardio-Pulmonary Resuscitation) unit is positioned at the head end of the mattress core, to allow the air to be evacuated in under 10 seconds, should a cardiac arrest occur. The mattress overlay is connected to the pump via a 3-way tubeset which is permanently connected to the mattress overlay. The tubeset has a 3-way pneumatic connection which incorporates a flexible, compact anti-kink tube that is resistant to crushing and any subsequent obstruction of air flow. Dark Blue

“Cell-in-Cell” (Light Blue)

Dark Blue

Foot End Cell Numbers

Head End 20 19 18 17 16 15 14 13 12 11 10 9 8 7

6

17 Alternating Cells

5 4 3

2 1

3 Static Cells

Figure 3 - Mattress Overlay Cell Numbering

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To switch to transport mode, disconnect the tubeset from the pump. This will automatically seal the mattress so that air is not exhausted, and also allows cross-connection of the cells to create an even pressure in all the cells. To resume normal operation, reconnect the tubeset to the pump. The mattress overlay is enclosed by a polyurethane-coated fabric cover. This cover has water-resistant, vapour permeable, and two-way stretch properties to assist with any repositioning requirements and enhance patient comfort, whilst protecting the mattress interior from contamination. It is simple to clean in situ, but can also be quickly unzipped and totally removed for cleaning. The zips are protected by flaps to prevent the ingress of contaminants. The base cover for the mattress overlay has four adjustable corner retention straps which slide under the corners of the base mattress. To prevent any damage to the mains/power cable and to keep it tidy, the mains/power cable is placed under the cable management flap, which runs down the opposite side of the mattress overlay to the pump tubeset and CPR unit, and is secured by pop studs.

Auto Logic 200 Mattress Replacement (Refer to Figure 2) The mattress replacement comprises a mattress overlay on top of a mattress base pad. The mattress overlay is similar to the Auto Logic 110 Mattress Overlay, but has two extra zips to secure the mattress base pad to it. There is also a pneumatic connection between the mattress overlay and the mattress base pad. The base pad has eight adjustable straps on the underside to attach it to the bed frame. The mattress base pad comprises a main body zone and a perimeter cell zone. Both zones are fed directly from the air supply in the mattress overlay and are kept at a constant pressure: the main body zone will be at the same static pressure as the head cells in the mattress overlay and the perimeter cell zone will be at the higher static pressure of the cell-in-cells in the mattress overlay. The air in the mattress base pad is evacuated via the CPR unit in the mattress overlay, should a cardiac arrest occur. The mattress base pad also has a cable management flap, which runs down the opposite side of the mattress base pad to the pump tubeset and CPR unit, and is secured by pop studs.

Aura Logic Seat Cushion (Refer to Figure 4) The seat cushion comprises 7 alternating cells, which are connected to the pump via a 2-way tubeset (there is no static feed in the seat cushion). The 7 cells are manufactured as a single welded assembly, which is enclosed by a zipped cover. The base cover has two fixing straps to attach it to the chair. To switch to transport mode, disconnect the tubeset from the pump. This will automatically seal the seat cushion so that air is not exhausted, and also allow cross-connection of the alternating cells to create an even pressure in all the cells. To resume normal operation, reconnect the tubeset to the pump. There are two small dump valves on the underside of the base cover which are used to release the air inside the seat cushion in an emergency or for storage. Base Cover

Cell Assembly Dump Valves on underside of Case Cover

Base Cover

2-way Tubeset

Fixing Straps Figure 4 - Seat Cushion

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Membrane Cable

Con 14 (Microswitch)

Membrane Control Panel

Con 1

Con 15

Rechargeable Battery Con 6

Con 4 (Stepper Motor)

Patient Handset

Con 12

Con 8 (Coil)

Control PCB Assembly Ribbon Cable

RFID Coil Antenna

Control Board Connector

Con 3

FS2

FS1

Manifold Assembly Fuses Con 6 Con 7

Con 2

Mains/Power Cordset

Power Supply PCB Assembly

Battery Pack Connector

7 8

4 3

5 6

2 1

Compressor Assembly Figure 5 - Electrical Circuit Diagram

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Compressor

Control PCB Manifold Assembly

Transducer Tube

Pump

Valved Connections Alternating Feed “A”

Mattress Tubeset

Alternating Feed “B” Static Feed “C”

Mattress Overlay (Core)

Cells 5,17,19 “A” NonReturn Valve

Cells 4,16,18,20 “B” Cells 7-15 “A”

Cells 6-14 “B” Low Air Loss Patch “Cell-in-Cell”

Static Feed “C”

CPR

Partial Non-Return Valves

Static Feed “D”

Head Cells 1-3

Valved (Connected - Open) Connections (Disconnected - Closed)

Mattress Base Pad Valve Assembly Perimeter Cell Zone

Main Body Zone

Figure 6 - Pneumatic Schematic for Pump and Mattress

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3

Introduction

Operating Principle

Pump Refer to Figure 5 for the Electrical Schematic for the Pump. Refer to Figure 6 for the Pneumatic Schematic for the Pump and Mattress. Refer to Figure 9 for the Pneumatic Schematic for the Pump and Seat Cushion. A single compressor in the pump provides a flow of air to the pneumatic system. The output of the compressor is fed to the manifold assembly, which also incorporates the rotary valve assembly. The rotary valve assembly channels air to different groups of cells in the mattress. A tube from the manifold assembly is connected to a pressure transducer on the control printed circuit board (PCB). This provides the monitoring system with the means of accurately measuring the pressure of the air supply to the mattress. The control PCB controls the compressor, the motor and manifold assembly, and the control panel on the top of the pump. It also performs a continuous check of the operation and performance of the pneumatic circuit. In the event of a detected fault, the electronic monitoring system generates both visual and audible alarms. The real time clock on the control PCB holds the time and date information. The power supply PCB, in addition to generating the DC voltages for use in the pump, provides interfaces to the compressor and the optional battery pack. There are three outputs from the manifold assembly to the tubeset connections (to the mattress): •

Alternating air feed “A”.

•

Alternating air feed “B”.

•

Static air feed “C”.

The distribution of air by the rotary valve in the manifold assembly is shown in Figure 7. The cells “A” and “B” in the mattress overlay core are inflated and deflated in a cycle period of ten minutes, as follows: •

Alternating 1: the “A” cells are inflated and the “B” cells are deflated.

•

Static 2: brief crossover period where both “A” and “B” cells are inflated.

•

Alternating 3: the “A” cells are deflated and the “B” cells are inflated.

•

Static 4: pressure optimization cycle.

•

Throughout the whole cycle (1-4) the static feed “C” is constant. Alternating Cells

Head Section Static Cells

Alternating 1

Static

2

Alternating 3

Static

4

Cell-in-Cell (Static) Figure 7 - Mattress Overlay Cell Inflation Cycle

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Alarms and Indicators (Refer to Figure 8) The yellow Wait indicator is illuminated when the mattress/seat is being inflated. The indicator will remain illuminated until the mattress/seat has been fully inflated. The red Low Pressure indicator is illuminated whenever the pump detects low pressure within the mattress/seat. An audible alarm will sound unless cancelled by the Mute button. The indicator will extinguish once normal pressure is reached. The yellow Battery Low indicator will illuminate two hours before battery failure. One hour before battery failure, the pump will default to CLP (Constant Low Pressure) mode, an audible alarm will sound and the yellow indicator will flash. The Power Fail indicator will illuminate when a mains power failure has been detected and no battery backup is available. An audible alarm will sound until power is resumed or the pump is switched off using the run/standby button. The yellow Service indicator will illuminate and remain on after a set number of running hours. This indicates that the pump is due for a service. The pump will continue to function normally even when the service indicator is illuminated. If the yellow Service indicator flashes, the pump has detected an internal fault. During an alarm condition (except Power Fail), the sound of the alarm can be muted by pressing the Alarm Mute button. The yellow indicator will then remain on but the alarms will be muted for 15 minutes or until the alarm condition has been corrected.

Replacement Sub-Assembly Calibration The main replaceable sub-assemblies in the pump are: •

Manifold assembly.

•

Compressor assembly.

•

Control PCB assembly.

•

Power supply PCB assembly.

These replacement sub-assemblies are factory-calibrated, and do not require any further calibration after they have been installed in the pump.

Pressure Transducer Calibration The pump utilizes a precise and accurate pressure measurement and control system. It is factorycalibrated, and is not expected to require re-calibration until after several years of continuous use. The measurement system automatically handles any adverse effects due to drift or temperature change and should not require any user intervention. Low Pressure

Wait

Battery Low

Run/Standby Comfort Control Alarm Mute

Constant Low Pressure Mode

Service

Power Fail

Figure 8 - Pump Control Panel

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Introduction

Battery on the Control PCB Assembly The battery on the control PCB assembly provides power for the real time clock. The battery should not require replacement until after several years of continuous use. When the old battery is removed, the real time clock will lose its time and date settings, which can only be reloaded from a PC-based service tool, so the procedure should only be carried out in a Huntleigh service environment.

Mattress Overlay Core Refer to Figure 6 for the Pneumatic Schematic for the Pump and Mattress. The alternating feeds “A” and “B” supply air to the 17 alternating cells in the mattress overlay core. At the end of each ten minute cycle, the pump performs a pressure optimization cycle to automatically sense and adjust the air pressure of feeds “A” and “B” according to the weight of the patient. The comfort control on the pump control panel is used to make adjustments to the automatically calculated air pressure. The three head cells are supplied from a static feed “D”, which is generated by two partial non-return valves from the alternating feeds “A” and “B”. The partial non-return valves allow the air in the head cells to slowly bleed away so that they are never at the maximum “A” / “B” pressure. The two cell-in-cells in each of the 10 cells in the centre of the mattress are supplied from the pump static feed “C” via a non-return valve. The static feed “C” also supplies the low air loss patch under the cells.

Mattress Base Pad Refer to Figure 6 for the Pneumatic Schematic for the Pump and Mattress. There are three pneumatic connections between the mattress overlay core and the mattress base pad: •

Static air feed “C” from the static cell-in-cell line in the mattress overlay core.

•

Static air feed “D” from the static head cell line in the mattress overlay core.

•

Emergency air evacuation from the main body zone in the mattress base pad to the CPR in the mattress overlay core.

The static air feed “C” supplies the outer perimeter cell zone in the mattress base pad. The static air feed “D” supplies the inner main body zone on the mattress base pad via a valve assembly, which comprises two valves within a single valve body. One valve in the valve assembly has a 5 mmHg crack pressure into the main body zone (from the mattress overlay to the mattress base pad), and the other valve has a 30 mmHg crack pressure away from it (from the mattress base pad to the mattress overlay). During normal operation, the main body zone is inflated from the mattress overlay core via the 5 mmHg crack pressure side of the valve assembly. This keeps the mattress base pad very firm, since there is only a 5 mmHg pressure drop from the static head cell line. But if the pump or mattress overlay fails, and the pressure in the mattress overlay core reduces to zero, the pressure in the main body zone of the mattress base pad will bleed off via the 30 mmHg crack pressure side of the valve assembly to leave the main body zone at just 30 mmHg pressure for the patient to lie on more comfortably. The pneumatic connections between the mattress overlay core and the mattress base pad are valved on the air feed “C” and “D” lines, so that the mattress overlay core is automatically sealed when the overlay and base pad are separated. There are three outlets on the CPR assembly. When the CPR is operated on the mattress overlay, the air is evacuated from the mattress as follows: •

Outlet 1 evacuates the static air feed “C” from the static cell-in-cell line in the mattress overlay core and from the perimeter cell zone in the mattress base pad.

•

Outlet 2 evacuates the static air feed “D” from the static head cell line and the alternating cells in the mattress overlay core.

•

Outlet 3 evacuates the air from the main body zone in the mattress base pad. This is to bypass the valve assembly in the static air feed “D” line into main body zone of the mattress base pad.

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Seat Cushion Refer to Figure 9 for the Pneumatic Schematic for the Pump and Seat Cushion. The seven cells in the seat cushion are connected to the two alternating feeds “A” and “B” from the pump via a 2-way tubeset. The seat cushion has no static cells, so the static feed from the pump is blanked off inside the seat tubeset connector. The seven cells are not discrete, individually-replaceable cells but are a one-piece manufactured item and can only be replaced as a single cell assembly. There are four short manifolds welded into the base sheet assembly, two at each end of the cells. Cells 1, 3, 5 and 7 are connected to one pair of manifolds and cells 2, 4 and 6 are connected to the other pair. On one side of the mattress, the two manifolds are connected via the seat tubeset to the two alternating feeds “A” and “B” from the pump. The two manifolds at the opposite end of the cells are to equalise the pressures in alternate cells. There are two small dump valves on the underside of the base cover (Refer to Figure 4) which are used to release the air inside the seat cushion in an emergency or for storage. These are connected to the two manifolds adjacent to the seat tubeset. The dump valves are depressed manually to release the air. The seat cushion tubeset can be connected to and recognised by any pump in the Logic range.

Auto-Recognition System When the tubeset connector on the end of the mattress overlay or seat cushion is connected to the pump, the pump automatically recognises which system has been connected, and adjusts the pump output pressures accordingly. The auto-recognition system is short-range radio-based technology, comprising the following: •

A programmable device located in the tubeset connector on the mattress overlay and seat cushion.

•

An RFID (Radio Frequency Identification) coil antenna located on the pump manifold assembly.

System Start Up Sequence (Refer to Figure 8) 3.1

3.2

When the pump is switched on at the mains/power supply or a battery pack is connected, a Built-In Self-Test (BIST) routine will run. The BIST routine is as follows: 3.1.1

The green indicator on the front of the pump will illuminate.

3.1.2

After approximately one second, the green indicator on the front of the pump will extinguish, and the sounder will “beep”.

3.1.3

All the indicators on the pump control panel and the front case will remain extinguished.

3.1.4

The sounder will “beep” at the end of the successful BIST routine (after approximately 20 seconds).

3.1.5

If the Run/Standby button is pressed during the BIST routine, the Run/Standby indicator will illuminate immediately, and at the end of the BIST routine the pump will go into Run mode (Refer to Para 3.2). Otherwise the pump will go into Standby mode.

At the end of the BIST routine, if the pump is not already in the Run mode, press the Run/ Standby button on the pump control panel to start the Run sequence, as follows: 3.2.1

The green indicator on the front case and the Wait and Comfort indicators on the pump control panel will illuminate immediately.

3.2.2

The Run/Standby indicator will quickly flash on - off - on, and then remain illuminated.

3.3

Allow approximately 7 minutes for the mattress overlay, 15 minutes for the mattress replacement or 3 minutes for the seat cushion to inflate fully.

3.4

The amber Wait indicator will go off once the mattress/seat is fully inflated.

3.5

Once a patient is on the mattress, the pump will automatically sense and adjust the pressure in the cells for the appropriate patient weight.

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Compressor Manifold Assembly Control PCB Transducer Tube Valved Connections

Pump

Alternating Feed “A”

Static Feed “C” (Blanked Off)

Balancing Manifolds

Alternating Feed “B” Seat Tubeset

Seat Cushion Inlet Manifolds “B”

“A”

Cells 1,3,5,7 “A” Cells 2,4,6 “B”

“A”

Pressure Equalising “B” Manifolds

Dump Valves (Manually depressed to deflate Seat Cushion) Figure 9 - Pneumatic Schematic for Pump and Seat Cushion

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Troubleshooting

CHAPTER 2 TROUBLESHOOTING 1

Controls, Alarms and Indicators (Refer to Figure 10)

The pump features an audible and visual alarm. If a problem occurs, the system will: 1.1

Sense the fault.

1.2

Illuminate the relevant LED indicator on the control panel on top of the pump, and illuminate the red LED indicator on the front of the pump.

1.3

Sound an audible alarm.

During an alarm condition (except Power Fail), the sound of the alarm can be muted by pressing the Alarm Mute button on the pump control panel. The yellow Alarm indicator will remain on but the alarm will be muted for 15 minutes or until the alarm condition has been corrected (Refer to Figure 10).

Low Pressure

Wait

Battery Low

Run/Standby Comfort Control Alarm Mute

Constant Low Pressure Mode

Service

Power Fail

Figure 10 - Pump Control Panel

2

Diagnosing Faults

2.1

Faults in the system (i.e. pump, mattress overlay/replacement and/or seat cushion) can be diagnosed using the LED indicators on the pump control panel (Refer to Page 2, Section 3).

2.2

If the pump is connected to a computer, then the service engineer can read the Critical and NonCritical Event Logs using the Communicator software to see if any problems or faults have occurred since the pump had its last service (Refer to Page 4, Section 4).

2.3

If the pump can not be connected to a computer, pump faults can still be diagnosed using the pump BIST routine. The service engineer can remove the rear case from the pump and run the BIST routine, and then diagnose pump faults by listening to and observing the operation of the sub-assemblies inside the pump (Refer to Page 9, Section 6).

2.4

Faults in the intelligent battery pack can be diagnosed using the LED indicators on the top of the battery pack (Refer to Page 11, Section 7).

Issue 2 March 2004

SER0006

Chap 2 Page 1