Plexus P2500 - Meena Medical Inc.
Contents
1. 2 0 3 Test for 14 VAC at input side of secondary fuses 1A See figure 2 0 3a If 14 VAC is present continue to 2 0 4 If 14 VAC is not present Does the blower get check for 14 VAC across secondary terminals 7 too hot amp 12 of transformer See figure 2 0 3b If procedure 22 voltage is not present disconnect power and check resistance across primary terminals 1 amp 6 and then 2 amp 5 and secondary terminals 7 amp 12 and then 8 amp 11 of transformer If any of the four transformer coils are open replace transformer If transformer coils are not open check for loose terminals on supply wires to transformer Check wiring diagram to ensure Is the blower i i ee role Ale See Diagnostic transformer is wired correctly there excessive procedure 2 3 2 0 4 Test for 14 VAC at output side of secondary vibration fuses 1A If 14V is present continue to 2 0 5 If voltage is not present disconnect power remove and inspect fuses 2 0 5 Test for 14 VAC at J4 on main circuit board in front panel See figure 2 0 5 If 14 VAC is present and no LEDs illuminate on front panel Does the unit meet replace circuit board calibration specifications Calibration Diagnostic Procedure 2 1 P2500 No Air Flow Blower Does not Spin 2 1 0 Test for Line voltage 110 VAC 230VAC at output of primary fuses 5A at 110 VAC 2 5A at 230 VAC See figure 2 1 0 If voltage is present continue to 2 1 1 If no voltage is present check2. remove it If no restriction to airflow is found and temperatures exceed the limit stated above the blower should be replaced Any obstruction to airflow particularly a dirty filter will cause excessive heat and greatly shorten the life of the blower If cleaning the filter or clearing an obstruction lowers the operating temperature to an acceptable value the unit may be put back into service Diagnostic Procedure 2 3 P2500 Excessive Noise or Vibration 2 3 0 2 3 1 Any whistling or sound of moving air is generally caused by a leak in the air path from the blower to the mattress These noises leaks are easily identified by feeling around inside the enclosure until escaping air is found somewhere in the unit If the noise is not due to leaking air continue to 2 3 1 Extreme care must be taken to avoid touching the current carrying elements such as the fuse blocks inside the unit to avoid electric shock Care must also be taken to avoid touching the rotating machinery If a leak can be identified it should be repaired by replacement of the damaged component The most common noise producing failure is the self adhesive foam AP gasket see figure 2 3 0 Occasionally the gasket adhesive will release typically due to excessive heat see also procedure 2 2 0 If any unusual noise or vibration is found coming from the blower itself it should be replaced immediately Parts of the blower rotate at high speed and any physical da
3. 13 3 Installing a New Control PC Board Assembly Upon installing a new control PC board it will be necessary to perform the PC board calibration procedure Please see section 12 0 Calibration Procedures Figure 11 PC Board Page 14 Plexus Aire Select 14 0 Parts List 14 1 Rear Enclosure Wire Harness TYP 3PLCS DETAILA SCALE 1 1 Page 15 Plexus Aire Select Item Description Plexus PN 120 V Model Plexus PN 220 V Model 1 Enclosure Rear 20214 2500 20214 2500 2 Sound Foam Set 20218 20218 3 Filter Foam 20228 20228 4 Baffle 20215 20215 5 PVC Cleaner N A N A 6 ABS Adhesive N A N A 7 Fuse Holder 10056 10056 8 6 32 Screw 10069 10069 9 Fuse Label 5A 120 V or 2 5A 230 V 50038 50038 2 5 10 Fuse 5A 120 V or 2 5A 230 V 10065 10219 11 Fuse Label 1A 50039 50039 12 Fuse 1A 10064 10064 13 Transformer 24V 10055 10055 14 10 32 Screw 10362 10362 15 Altered Blower 11496 2500 11675 2500 16 Standoff 10047 10047 17 Vibration Mount 10048 10048 18 10 32 Screw 10070 10070 19 Valve Assy 30059 30059 20 3 8 NPT Male Connector 10037 10037 21 O Ring 10081 10081 22 Molded Hook Assy 30297 30297 23 10 32 Screw 10070 BOSS 10070 BOSS 24 10 Lock washer internal tooth 10387 10387 25 Power entry module 1004
4. of mattress may be cleaned with a damp cloth and mild detergent Do not disinfect with alcohol which may cause mattress material degradation Cushions are made of plastic If it is necessary to sterilize cushions use ETO sterilization and or handle like any other plastic product Sterilization temperatures must not exceed 57 C 135 F See appropriate mattress service literature for additional cleaning instructions 7 0 Routine Maintenance and Function Testing see figures 3 and 4 7 1 Routine Maintenance Visually check the unit for physical damage Specifically inspect the power cord power inlet connector hose connectors and O rings Repair replace end of this section to document testing If the unit passes the tests outlined in this section it can be considered functional and ready for service If the unit does not pass the following described tests it should be removed from service and calibrated or repaired Mattresses should also be periodically inspected in accordance with the instructions outlined in the appropriate mattress manual Required Tools Manometer pressure gauge 0 100 mmHg range Mattress Simulator Or M2500 mattress with P N 11668 000 see figure 4 Test Conditions The following tests should be performed in a 70 degree room after the unit has been allowed to operate for 15 minutes Plexus P N 10329 Plexus P N 11667 000 Plexus Aire Select Test Procedure Connect the unit to the mattres
5. 2 Replacing the AP Valve Assembly or PC Board and Motor Assembly see figure 7 Replace AP Board and Rotor Only PN 30058 e THE AP BOARD IS EXTREMELY SENSITVE TO STATIC Under normal conditions the valve body and bottom plate will not need to be replaced Only the board and rotor will need to be changed 1 Remove three screws Figure 7 AP valve assembly PC board and motor assembly parts 2 Release cable from blower by cutting tie wrap Disconnect cable from board 3 AP Board should now lift from valve body rotor will come out with board 4 Pull rotor off existing board NOTE There are two washers on the shaft that will be reused Installing Replacements 1 Place two washers on shaft of motor on replacement board Press rotor onto shaft aligning keywar Rotor should be seated firmly against washers and hub on motor shaft 2 Connect cable to main board on front enclosure Cable should be oriented with the wire proceding from the bottom of the connector and running toward the bottom of the main board 3 Insert AP Board assembly into valve body and secure with three screws 4 Secure wire to anchor points on blower and tie wraps Replace AP complete assembly PN 30059 1 Remove male couplings from outside of enclosure 2 Remove three screws that anchor the blower to the mounts Cut tie wraps securing wire harness Release connectors from main PCB Lift out blower and AP valve assembly Separate blo
6. 3 10113 39 10113 42 10113 48 10113 54 10113 60 Sleeve 30159 30159 39 30159 42 30159 48 30159 54 30159 60 Clamp Top 20046 20046 39 20046 42 20046 48 20046 54 20046 60 Clamp Bot 20045 20045 39 20045 42 20045 48 20045 54 20045 60 Clamp Screw 10116 10116 10116 10116 10116 10116 Base 30065 NF 30065 39 30065 42 30065 48 30065 54 30065 60 Foam 20001 20001 39 20001 42 20001 48 20001 54 20001 60 Foam Cover 30065 FC 30065 FC39 30065 FC42 30065 FC48 30065 FC54 30065 FC60 For private label components contact customer service Page 8 Plexus Aire Select 11 0 Control Unit Troubleshooting Diagnostic Procedure 2 0 P2500 Unit Apparently Dead No Indication of Apply power to unit F Do any lightson Power in Lights on Main Panel control panel procedure 20 2 0 1 Apply power and test for line cord mains voltage illuminate 110V 230V at input side of primary fuses 5A on 110 VACmodels 2 5A on 230 VAC models See figure 2 0 1 for test points If appropriate line voltage is present continue to 2 0 2 If no voltage is present check power supply or wall outlet and check for loose terminals on supply lines from power entry module Does the blower spin Is there air flow 2 0 2 Test for 110 VAC 230 VAC at output of fuses out of the procedure 2 1 See figure 2 0 2 for test points If voltage is tors ee present continue to test 2 0 3 If no voltage is present disconnect power remove and inspect fuses
7. 9 SNAP 10259 SNAP 36 Label CPR 50041 50041 N A Wire Harness 30080 N A Page 16 Plexus Aire Select 14 2 Front Enclosure ASSY WARE HARNESS PN 30060 00 FROM ASSY REAR ENCLOSURE PN 30035 SECTION A A Page 17 Plexus Aire Select Item Description Plexus PN 120 V Model Plexus PN 220 V Model 1 Sound Foam Set 20218 20218 2 Logo Label 20037 20037 4 Overlay Label 20054 20054 6 PCB Mounting Plate 20047 20047 7 Spacer 20041 20041 8 Nylon 4 40 Nut 10087 10087 9 4 Flat Washer 10088 10088 10 4 4 Nut 10089 10089 11 Main PCB 30096 30096 12 Front Enclosure 20213 20213 For private label components contact Technical Service Page 18 A GAYMAR COMPANY 10 Centre Drive Orchard Park NY 14127 2295 Phone 1 800 828 7341 716 662 2551 FAX 1 800 993 7890 716 662 0748
8. Components replacement parts may be ordered by specifying the Plexus Medical part number as shown in the parts lists e Plexus C2500 Control Unit Repairs If the Plexus C2500 Control Unit becomes inoperative and the cause cannot be determined the complete control unit may be returned to the factory for servicing at the purchaser s expense see Return Authorization 3 3 Return Authorization Please be sure to obtain a return goods RG authorization number from Plexus Medical s Customer Service Department before returning the Aire Select control unit or mattress or any component parts to Plexus Medical USA only 1 800 828 7341 Outside USA 716 662 8636 Page 2 Plexus Aire Select 4 0 Specifications Physcial Dimensions 12 x 10 x 5 30 cm x 25 cm x 13 cm Weight 9 Ibs 4 08 kg Operating Ambient 65 F to 75 F Temperature Range Storage Conditions Ambient Temperature 40 F to 105 F Range Relative Humidity 30 to 75 Non condensing Electrical Domestic European Power 120 V 220 V Frequency 60 Hz 50 Hz Current 1A A Type BF Equipment Attention Consult Accompanying Documents IPXO protection Against Harmful Ingress of Liquids Ordinary Protection IPX 0 Agency Approval TUV IEC 60601 1 220V only UL 544 22 22 No 125 Page 3 Plexus Aire Select 5 0 Control Panel e MAX INFLATE 5 1 Front Panel Features 3 The air mattress can be maximally inflated 32mmH 9 by see figure 1 pushin
9. Plexus P2500 Aire Select System Service Manual PN 11615 000 Plexus Aire Select Table of Contents Section Description Page 1 0 Contraindications Indications Precautions 2 2 0 Receiving Inspection 3 3 0 Repair Policy 3 4 0 Specifications 3 5 0 Control Panel 4 6 0 Cleaning 5 7 0 Maintenace and Function Testing 5 8 0 Test Check Sheet 7 9 0 Mattress Storage and Care 8 10 0 Mattress Troubleshooting 8 11 0 Troubleshooting 9 12 0 Calibration 11 13 0 Repair Procedures 12 14 0 Parts List 15 Figures Figure Description Page 1 C 2500 Front Control Panel 4 2 C 2500 Rear Panel 5 3 Function Testing 6 4 Function Testing 6 5 Blower Side View 12 6 Blower Front View 12 7 AP valve assembly and PV board and motor assembly parts 13 8 Rotor center position 14 9 Rotor side position 14 10 Rotor side position 14 11 PC Board Assembly 14 2002 Plexus Medical All Rights reserved Page 1 Important Before using the Plexus C 2500 please read and understand t
10. d AP off Change pressure using adjustment potentiometer located on the blower under the cap at the eight o clock position potentiometer located at two o clock on 230V units Firm should be set for 27 4mmHg Plexus Aire Select 3 Turn on the MAX INFLATE function and adjust the left hand potentiometer on main PCB MAX should be set for 28 4mmHg 4 Turn off MAX INFLATE and reduce the pressure setting to SOFT one LED lighted MAX and AP off Adjust right hand potentiometer on the main PCB soft should be set for 10 3 mmHg 5 Close unit and verify reading are within specifications _ o 3 ss _ _ Figure 5 Blower Side View 13 0 Repair procedures Repairs of Plexus Medical products should only be performed by qualified and experienced technicians familiar with repairing medical equipment Before attempting repair of Plexus medical products it is recommended that technicians review this service manual completely and have the necessary test tools called out in the manual Function testing of the machine for proper operation is required after all repairs If you do not have the required technical skills and test tools it is recommended that the machine be returned to the factory for servicing Improper servicing can result in improper clinical performance of the system premature failure of system components and invalidated warranties Replacement repair of many of the components in this machine do not
11. g the MAX INFLATE button on the control unit to assist in patient ingress egress as well as normal e ON STANDBY nursing procedures 3 Used to turn the system on and off 3 Upon initiating the maximum inflate condition the mattress will rapidly inflate to its highest firmest level and maintain that setting MAX INFLATE button will remain illuminated while The amber LED indicates the unit is in standby mode The green LED indicates the unit is in normal running mode system is in maximum inflation mode e FULLY ILLUMINATED POWER AND Ifthe MAX INFLATE button is pushed during max SOFT FIRM CONTROLS inflation mode the button will cease illuminating and the 3 The Plexus 2500 provides the added benefit of patient system will return to previously chosen settings comfort control After 30 minutes in the MAX IN FLATE mode the The soft button is used to decrease the pressure in the system is programmed to automatically return to the mattress and the firm button is used to increase the therapeutic settings This fail safe feature prevents a high risk patient from inadvertently being left on a pressure in the mattress with a range between l firmer than therapeutic surface approximately LOmmHg and 32mmH g max Nine pressure settings are available to enable the user to ON DEMAND ALTERNATING LOW select the lowest possible pressure that will still support PRESSURE THERAPY the patient The Plexus Aire Select sys
12. he Plexus 2500 Manual and the SAFETY PRECAUTIONS in section 1 0 page 2 prior to each application Only qualified medical service personnel should repair the Plexus C 2500 In the event of any questions contact our Technical Service Department for assistance USA Only Phone 1 800 828 7341 Fax 1 800 993 7890 Outside USA Phone 716 662 8636 Fax 716 662 0730 Plexus Aire Select 1 0 Contraindications Refer to Operator s Manual 1 1 Indications for Use Theory of Operation Refer to Operator s Manual for proper operation of system 1 2 Safety Precautions Review the following SAFETY PRECAUTIONS prior to servicing the Plexus C2500 e Explosion hazard Do not use in the presence of flammable anesthetics e Risk of electric shock Refer servicing to qualified service personnel CAUTION e Disconnect power before servicing the Plexus 2500 control unit e Repairs should be performed only by qualified personnel familiar with repair practices for servicing medical devices Do not attempt to repair the Plexus C2500 Control Unit unless you possess these skills Otherwise damage to or malfunction of the control unit may result 2 0 Receiving Inspection Upon receipt unpack the Plexus C2500 Control Unit and inspect for concealed damage Save all packing material If any damage is found notify the carrier at once and ask for a written inspection Prepare a written description of any damage P
13. hotograph any damage Failure to take the above action within 15 days of receipt may result in loss of claim Do not return the Plexus C2500 Control Unit to Plexus Medical Contact Plexus Medical s Technical Service Department for instructions USA only 1 800 828 7341 Outside USA 716 662 8636 3 0 Repair Policy The Plexus C2500 Control Unit is warranted free of defects in material and workmanship for a period of two 2 years and M2500 mattress one 1 year The Control Unit and mattress is warranted under the terms and conditions of the Plexus Medical warranty in place at the time of purchase A copy of the warranty is available upon request Plexus Medical disclaims all implied warranties including but not limited to the implied warranties of merchantability and of fitness for a particular purpose Control units and mattress may be returned to the factory for servicing see Return Authorization For customers who choose to repair Aire Select systems at their location this manual contains information to allow a qualified technician to make necessary repairs For technical support contact Plexus Medical s Technical Service Department 3 1 In Warranty Repairs All in warranty repairs must be authorized by Plexus Medical s Technical Service Department before proceeding 3 2 Out of Warranty Repairs The following repair options are available when servicing Plexus Aire Select Control Units and mattress e Defective
14. mage due to wear or other causes warrants replacement to ensure safe operation The unit is constructed with sealed bearings that will normally give years of trouble free service but unusual noise is generally a sign of bearing failure Neglecting to clean the filter as specified in the operator s manual can result in premature blower failure Page 10 Plexus Aire Select Diagnostic Procedure 2 4 P2500 Verify Proper Operation AP mode 2 4 0 Press the AP button to turn on the AP Test for 6 VDC across the AP motor terminals on the AP valve If 6 VDC is not present for at least a few seconds replace the Main PCB in the front panel If 6 VDC is present at least for a few seconds and the airflow from top and bottom ports on side of unit do not change return AP valve to factory for rebuilding and repair If 6 VDC is present at least for a few seconds and the airflow from top and bottom ports on side of unit is not as expected i e both ports change airflow continuously or only one port will change when AP is fully cycled continue to next step below 2 4 1 If airflow from both ports change continually in AP mode check the filtered sensor output from the PCB on the AP valve as follows 1 Check for 5VDC across pin 3 orange wire and pin 6 blue wire of the AP ribbon cable connector The wires may be probed by taking the PCB out of the front panel and picking up the pins on the other side Pin 1 is next to the arrow a
15. ng the blower at the pressure tap shown in figure 2 2 0 screw must be removed The unit must be fully assembled attached to a properly functioning mattress at least 15 minutes allowed for normal operating temperature to be reached and ambient temperature must be between 65 75 F or 18 24 C for any temperature measurement to be valid Blower exhaust temperature under these conditions should not exceed 120 F or 49 C Temperatures in the mattress will be substantially lower due to convection and radiation from the manifold and air cells If the exhaust temperature is below this limit the unit is operating normally If the exhaust temperature exceeds this limit continue to 2 2 1 Inspect the air filter for dirt and lint accumulation If the filter is clean continue to 2 2 2 If the filter is dirty clean it according to the instructions in the operator s manual A failing blower that is generating excessive heat due to failing bearings or other internal problem will generally be noisy as well as hot See also procedure 2 3 0 regarding blower noise Any obstruction to airflow particularly a dirty filter will cause excessive heat and greatly shorten the life of the blower If cleaning the filter or clearing an obstruction lowers the 2 2 2 operating temperature to an acceptable value the unit may be put back into service Inspect for an obstruction to airflow in the unit or hoses after the blower If an obstruction is present
16. require specific detailed instructions Some of them do Following are instructions for some of the more complex replacement repair items in this machine Important The AP valve PC board contains electronic components that are highly sensitive to static discharge It is mandatory that the technician opening the unit employ a grounding strap to avoid damaging the PC board AP valve PC boards damaged by static discharge will not be covered by warranty 13 1 Replacing the Blower see figures 5 and 6 Remove male couplings from outside of enclosure Remove three screws that anchor the blower to the mounts Cut tie wraps securing wire harness Release connectors from main PCB Lift out blower and AP valve assembly Separate blower from AP value nstalling Replacements Insert replacement blower nozzle into AP valve NOTE Care should be taken not to damage gasket on AP valve 2 Lower blower and AP valve into place in the rear enclosure 3 Install male couplings through rear enclousre and tighten into value body 4 Secure blower to mounts with three screws NOTE Make sure ground jumper and wire to main PCB are secured at the lower left mount 5 Reattach connectors from wireless harness to main PCB and secure wires to the anchor points NOTE After replacing the blower or main PCB the calibration procedure must be completed Na 5 OR Figure 6 Blower Front View Page 12 Plexus Aire Select 13
17. roubleshooting sections of this manual for assistance in determining repairing the problem Figure 4 C 2500 Function Test Page 6 Plexus Aire Select Function Test Check Sheet Model Serial Test Procedure Results Manometer Readings steps 1 3 mmHg mmHg mmHg AP mode functions properly step 4 Pass Fail Electrical safety test results step 5 Pass Fail Max current leakage reading Ground resistance less than 0 5 ohms Pass Fail Tested by Page 7 Plexus Aire Select 9 0 Mattress Storage and Care Roll the mattress up starting at the head and secure with straps provided at the feet Store in a plastic bag to prevent contamination 10 0 Mattress Troubleshooting Mattress testing on this low air loss mattress is extremely simple and requires only the use of a good control unit or other device to inflate the mattress The only possible problem conditions are unintended leaks in the system disconnected cells and kinked or twisted hoses or manifold Diagnostic Procedure 1 0 Low Air loss Mattress Leaks in Mattress Manifold or hoses 1 0 0 Unintended leaks can be felt and heard without the use of any special equipment There should be no detectable air escaping from any portion of the system except for the four holes in the top of each air cell Any component with a hole should be replaced Also Verify that there are actually four holes in the air cells if the mattre
18. s exceeds three mmHg see procedure 2 4 0 to troubleshoot the AP valve 2 When the AP is turned on and all nine comfort control lights are on max inflate off the pressure in one side should drop by at least 5 mmHg and no more than 20 mmHg relative to the other side If the pressure does not drop see procedure 2 4 0 totroubleshoot the AP valve 3 When AP is pressed again the pressures should equalize and the light should go out under the AP button If the pressures do not equalize see procedure 2 4 0 to troubleshoot the AP valve 4 When the AP is turned on again the pressure in the other side should drop by at least 5 mmHg and no more than 20mmHg If the pressure does not drop see procedure to troubleshoot the AP valve 12 1 Calibration Procedure NOTE The following calibration procedure is intended to be performed only if the machine does not pass the function testing outlined in section 8 0 It is not intended to be performed on a routine basis NOTE Unit must be warmed up for proper calibration and accurate pressure readings Adjustments must be made for the high end of the ranges called out in the procedure as the pressures will drop slightly when the unit is closed Final pressure readings should be taken with the unit closed 1 Connect unit to mattress simulator or appropriate mattress Insure the connections used on the manifold do not contain orifices 2 Set unit for Firm all nine LED s lighted MAX an
19. s simulator or test mattress as shown in figures 3 and 4 1 With the unit operating in the Low Air Loss mode AP light off press the appropriate soft firm key until one LED bar is lit on the comfort control indicator After a moment verify the test manometer reads 9 4 mmHg 2 Adjust the soft firm keys until all the LED bars are lit on the comfort control indicator After a moment verify the test manometer reads 27 4 mmHg Press the max inflate key After a few moments verify the test manometer reads 28 4 mmHg 4 Disconnect the mattress simulator or test mattress from the unit Press the AP key and verify that there is a noticeable decrease in the airflow pressure from one of the outlets on the machine Leave the unit in AP mode and verify that the higher lower airflow alternates from one port to the other The alternating cycle time is approximately 4 minutes note unlike some APP pumps the airflow does not completely shut off from one port to the other on this unit 5 Perform electrical safety testing with an approved testing device Current leakage values should not exceed 100uAmps for 120V units or 500uAmps for 220V units Ground line resistance should be less than 5 ohms 6 Fill out a copy of the check sheet documenting the serial number of the machine and results File for future reference If any of the tests outlined above were not satisfactory the unit should not be put into service Refer to the calibration and or t
20. ss was unintentionally assembled with sealed cells form an APM mattress overheating damage and malfunction will occur to the control unit Female Couplings Low Air loss Mattress Disconnected Cells see also leaks 1 0 0 Disconnected air cells should be reconnected Occasionally the white quick connect fittings can come out of the red orange flange in either the cells or the manifold if not damaged the fittings may be glued into the flange superglue Note Care should be taken so that excess glue does not leak into the air cells during reassembly Alternatively a replacement manifold may be purchased Diagnostic Procedure 1 2 Low Air loss Mattress Kinks Twists in Manifold 1 2 0 Kinked or twisted manifolds and hoses will restrict airflow If this condition occurs untwist the manifold or hose assy and verify proper mattress operation 10 1 Parts M2500 Topsheet Foam Air Cells and Clamps Sleeve Manifold Mattress Size Standard 39 42 48 54 60 Description Part Numbers Topsheet 30006 30006 39 30006 42 30006 48 30006 54 30006 60 Air Cell 30008 30008 39 30008 42 30008 48 30008 54 30008 60 Manifold Assy 30089 30089 39 30089 42 30089 48 30089 54 30089 60 Spiral Tubing 10035 10035 39 10035 42 10035 48 10035 54 10035 60 Manifold Welded 30088 30088 39 30088 42 30088 48 30088 54 30088 60 Female Coupling 10057 10057 39 10057 42 10057 48 10057 54 10057 60 mae a to 1011
21. t the base of the blue connector and the pins are numbered as shown below If voltage is less than 4 5 or more than 6 5 volts replace the main PCB in the front panel 1 2 3 4 5 6 7 8 9 10 2 Check for voltage polarity change between 0 and 5 VDC across pins 3 orange and 7 purple at least once every 2 5 minutes If airflow is constantly changing and voltage polarity change is not present repair replace AP valve assembly If voltage switch is present replace main PCB in front panel 12 0 Calibration The calibration procedure should only be performed if the unit does not pass the functional check and safety inspection testing see Section 8 0 page x Attach a mattress or approved mattress simulator to the unit and allow 25 minutes of operation for the system to come to stable operating temperatures If a mattress is used insert two pressure gages between two adjacent Page 11 cells and the manifold in the center of the mattress Each gage must be attached to both the air cell and the manifold via a tee in order to develop appropriate back pressure on the unit If a mattress simulator is used attach the simulator to the unit and attach two pressure gages to the simulator using the fittings provided Verify proper AP operation as follows 1 Start with the AP off light under button off and verify the pressures are equal on both gages If the pressure difference between the two measurement
22. tem gives the caregiver 3 An LED panel reminds the caregiver of the system the option of whether or not to use alternating low settings that are correct for their patient pressure therapy A simple push of a button on the control unit transforms the Plexus Aire Select system from a low air loss therapy system to one that provides alternating pressure therapy EJPLOUS Pp 00 LOW AIR LOSS amp ALTERNATING PRESSURE e AP MAX elated INFLATE Figure 1 C 2500 Front Control Panel Page 4 Plexus Aire Select 5 2 Rear Panel Features see figure 2 1 WASHABLE FILTER ELEMENT Requires periodic cleaning between patient uses or every 30 days 2 MODEL SERIAL NUMBER IDENTIFICATION PLATE This barcode label must not be removed from the unit The model and serial number information is needed to arrange for returns to the factory 3 CURRENT LEAK TEST ACCESS POINT Figure 2 C 2500 Rear Panel Page 5 6 0 Cleaning 6 1 Chassis exterior To clean use soap and water and a clean cloth to wipe down the pump power cord and hoses Wipe dry with a clean dry cloth Do not autoclave NOTE Blood and other fluids must be thoroughly cleaned from all surfaces before applying the disinfectant Apply a hospital grade disinfectant according to the manufacturer s instructions and hospital protocol Allow to completely dry The contact time is what makes the solution effective 6 2 Mattress Outside surfaces
23. the following power supply condition of primary fuses and inspect for loose connections or broken wires on supply lines from power entry module to fuses THE UNIT IS READY FOR SERVICE Page 9 Plexus Aire Select Test for voltage between 0 10 VDC at J3 on main circuit board at front panel See figure 2 1 1 This voltage is an analog speed control signal to the blower OV is off and 10V is max max voltage for a calibrated unit is typically 7 5 to 8 5 volts depending on altitude If a non zero voltage less than 10V is present continue to 2 1 2 If voltage is not present check for on condition on front panel If main circuit board will not generate a signal in the appropriate range test also with the connector removed from J3 if correct signal is not found when attached replace main circuit board Check for loose connections in supply wires to blower from fuses and in signal wires from J3 to blower If no loose connections or breaks in the circuit are found replace blower NOTE Blower may be bench tested by applying line voltage 110 VAC or 230VAC see blower information on underside to the 18ga Black and white wires and connecting the 22ga Red and black wires to a power supply between 0 and 10V red is positive A dry cell battery between 1 5v and 9v may also be used Diagnostic Procedure 2 2 P2500 Blower too Hot 2 2 0 Use a thermocouple to measure the output temperature of the airflow exiti
24. wer from AP valve nstalling Replacements Insert blower nozzle intor replacement AP valve Lower blower and AP valve into place in the rear enclosure 3 Install male couplings through rear enclosure and tighten into valve body 4 Secure blower to mounts NOTE Insure ground jumper and wire to main PCB are secured at the lower left mount 5 Reattch connectors from wire harness to main PCB and secure wires to the anchor points Page 13 5 OR Y ha Plexus Aire Select AP valve assembly pre installation test 3 Turn on the AP function The rotor should turn to the Before reinstalling the AP valve assembly it is left or right side positions see Figure 9 or10 below recommended to perform the following test to ensure the 4 Turn the AP function off and the rotor should return rotor will not hang up and the value operates properly to the center Turn the AP function on again and the rotor should turn to the opposite side position turned 1 Conne ct cable from PBC Rotor assembly to main in number 3 see Figure 9 or 10 below board on front enclosure Cable should be oriented with the wire proceeding from the bottom of the connector and running toward the bottom of the main board 2 Turn unit on and make sure the unit is not in AP mode The rotor should revolve and stop at the center positon see Figure 8 below Fiaure 8 rotor center position Figure 9 rotor side position Figure 10 rotor side position
Download Pdf Manuals
Related Search