Nuvo Lite Maintenance & Service Manual
Contents
1. NONA Power Cord Replacement Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the cabinet back Clip the power cord retaining tie wrap Slide the power cord strain relief reinforcement upwards to remove it from the mounting location at the bottom of the front cabinet Disconnect the power cord leads from the terminal quick connects Connect the leads on the new power cord at the terminal quick connects Reinstall the power cord strain relief into the base of the unit Reconnect the cabinet back and install a new power cord retaining tie wrap Troubleshooting Air Pressure Test P1 Testing the operating pressure is a useful diagnostic tool when a concentrator has low purity and requires servicing Units functioning normally do not require operating tests Use the following procedure to test the operating pressure of the unit Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the cabinet rear Remove the air supply tubing going to the control valve and install the test port tee fitting Figure 6 1 1 8 6 1 2 shows the normal operating configurations for each type of unit Figure 6 1 3 shows the installation of the test ports Connect the pressure test gauge to the test port Plug in the power cord and set the 1 0 ON OFF power switch to the ON position Set the flow meter to 5 l min and allow the unit to run at least five minutes Observe the2. Air feed connected to sieve bed A and exhaust connected to sieve bed B Air feed connected to sieve bed B and exhaust connected to sieve bed A Both ports open this is a very short time period during which air pressure builds in the sieve beds A om The control valve of the MARK 5 Lite requires no scheduled maintenance If a valve does function as required it is best to replace the complete sieve module as it is probable that one or both of the beds has been damaged 5 5 Sieve Bed Replacement CAUTION Do not expose molecular sieve contents of bed to air for an extended period of time Prolonged exposure of molecular sieve to the moisture in room air results in contamination and permanent damage to the sieve material Keep all openings to the sieve beds sealed during periods of storage NOTE It is recommended to replace the sieve beds and control valve as a complete assembly 5 5 1 Sieve Bed Removal 1 Set the unit s 1 0 ON OFF switch to the 0 OFF position and unplug the power 2 Remove the cabinet back 3 Disconnect the compressor discharge 5 16 tube from the top of the solenoid valve and the product tube from the regulator 4 Unplug the solenoid valve electrical leads at the solenoids 5 Lift the module up and out of the cradle 5 5 2 Sieve Bed Installation To install the sieve beds follow the sieve bed removal procedure in reverse order It is very important to tighten ensure that th
3. Connect test pressure gauge to the P1 test port on the module The pressure should be cycling between approximately 10 and 34 psig 70 and 235 kPa Make sure the unit is cycling properly by observing the pressure gauge cycle between a high and a low pressure If the unit is not cycling properly refer to troubleshooting chart Make sure that the unit is leak free by testing all tubing connections and fittings with leak testing solution Protect circuit board from solution and start leak test at the heat exchanger following the air flow through the unit to the oxygen outlet Repair all leaks by tightening connections and fittings Set the concentrator at 5 l min and connect pressure test gauge to P2 at the top of the sieve beds Determine pressure parameters by observing high and low pressure points on the gauge It should cycle between approximately 9 psig and 32 psig 62 to 220 kPa f pressures are high or low refer to the troubleshooting chart Review troubleshooting chart to isolate and repair any other malfunctions The following diagnostic flow chart will help to isolate potential problems 2010 8405 Rev E Jan 2011 25 of 48 Low Oxygen N Concentration n Verify Oxygen E Flow Rate Measure Air Pressure ON I Low Pressure High Pressure No A x S Replace Air Inlet Filter Replace Muffler Check for Leak
4. SUBSTITUTE DPST SWITCH IN PLACE OF TPST SWITCH 4 USE TWO BK VOLTAGE SELECT JUMPERS INSTEAD OF ONE BR COOLING FAN A 5 Electrical Schematic No Flow Alarm Option 2010 8405 Rev E Jan 2011 35 of 48 ASSEMBLY 0500 FRONT COVER 7 ASSEMBLY 0500 FRONT COVER A 6 ELECTRICAL amp COMPRESSOR ASSEMBLY 36 of 48 Jan 2011 2010 8405 Rev E 400 1513 8400 5018 9250 1170 8400 1012 8400 1010 8400 1049 8400 1052 8400 1053 8400 1016 8400 1094 8400 1095 8400 1161 8400 1162 8400 1163 8400 1030 8400 1013 9250 1062 8400 1510 8400 1500 8400 1512 9250 1330 9250 1311 8400 1018 8400 1019 8400 1008 9250 1012 9250 1023 9250 1024 8400 1042 8400 2450 8400 2460 8400 2466 8400 0010 8400 1014 8400 1011 8400 1009 8400 1017 8400 1041 8400 8450 2010 8405 Rev E DOA OONN _ bP sk mb 16 17 17 18 18 19 19 20 21 21 21 22 23 24 25 26 27 99 ELECTRICAL AND COMPRESSOR ASSEMBLY PARTS SHUNT VOLTAGE SELECTION HOURMETER 100 230 V 50 60 HOURMETER UNV W O CLIP SCREW 8 32 x 5 8 LG HEX HEAD BRACKET COMPRESSOR BRACKET HEAT EXCHANGER FITTING COMPRESSOR FITTING COMPRESSOR SPRING EXTENSION EXCHANGER HEAT EXCHANGER HEAT TUBING 5 16ODx3 16IDx12 5 LG TUBING 5 16ODx3 16IDx9 75 LG FITTING HX GROMMET 75 IDX1 0 HOLE RETAINER SPRING TIE WRAP 14 LONG WIRING HARNESS 230 VOLT WIRING HAR
5. 8400 1024 8400 1022 7631 1053 6956 9674 8400 1102 7854 6051 6491 1006 7854 6052 7854 6055 9250 1041 8400 1337 8400 1204 9250 1045 9251 1336 CABINET FRONT VALVE FCV 1 8 5 0 LPM KNOB FLOW 0 125 TO 5 0 FLOW RING LOCK OUT CLIP D STYLE FITTING OXYGEN OUTLET WASHER 3 8 STAR O2 OUTLET LITE NUT 3 8 24 O2 OUTLET LITE FILTER FINAL PRODUCT VALVE CHECK 1 4 HOSE MPC A975 FOAM ANTI VIBRATION HOSE 5 32 X 11 32 X3 LG SILIC ADAPTER 1 4 ODT 16 HOSE HOSE 5 32 X 11 32 X2 LG SILIC HOSE 5 32 X 11 32 X 7 LG SIL HOSE 5 32 X 11 32 X5 LONG SIL HOSE 1 8 ID X 1 4 OD 3 LG BOARD TIMING OMS 9V 5LPM SCREW PLASTITE 4X3 8 PAN HD SCREW 6 X32 X5 LG FLUSH A 7 A PARTS CABINET FRONT ASSEMBLY STD Jan 2011 N LL EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA 2010 8405 Rev E 8 CABINET FRONT ASSEMBLY OCSI Jan 2011 41 of 48 2010 8405 Rev E Part Reference Call Out Qty Unit of Number Number Part Description Required Measure 42 of 48 8400 0002 9251 1330 8400 1331 9251 1332 9251 1335 8400 1020 8400 1024 8400 1022 7631 1053 6956 9674 8400 1102 7854 6051 6491 1006 7854 6052 7854 6055 9250 1041 8400 1337 8400 1204 9250 1045 9251 1336 FRONT CABINET ASSEMBLY OCSI MODEL CABINET FRONT VALVE FCV 1 8 5 0 LPM KNOB FLOW 0 125 5 0 FLOW RING LOCK OUT CLIP D STYLE FITTING OXYGEN OUTLET WASHER 3 8 STAR O2 OU
6. CAUTION Describes a hazard or unsafe practice that can result in minor bodily injury or property damage NOTE Provides information important enough to emphasize or repeat The following harmonized symbols pictograms used for non English language countries will be located in the User s Guide of the MARK 5 NUVO Lite unit Read the accompanying documents particularly the User s Guide Store ship and use the device in an upright condition No smoking within five feet of this device oxygen carrying tubing or accessories Indicates an alarm signal for low oxygen concentration or other problem Do not use any oil or grease on or near the device OD OBE 1 3 Functional Specifications Dimensions 35 6 cm long 22 9 cm wide 58 5 cm high 14 in long 9 in wide 23 in tall Weight 13 kg 30 16 depending on sound attenuation package Electrical 115 VAC 60 Hz 10 lt 330 watts avg Requirements 230 VAC 50 Hz 10 lt 300 watts avg 230 VAC 60 Hz 10 330 watts avg 280 W for 3 l min unit Capacity Max 5 liters per minute 3 for 925 60K Accuracy Flow Valve 10 indicated flow rate 200 ml whichever is greater as 2010 8405 Rev E Jan 2011 7 of 48 per ISO 8359 Standard Concentration 2 liters per minute at gt 90 5 liters per minute at 90 6 5 3 Based on 21 C 70 F at sea level Response Time Acceptable concentration is normally achieved in about 90 seconds allow 5 mi
7. NO FLO PRESSURE HEAT EXCHANGER SENSOR l S P S R O E V D E PRODUCT FILTER I E U 1 B T B 1 D CHECK A VALVE COMPRESSOR 1 L 2 FLOW CONTROL OUTLET A e VALVE i MODULAR BED ASSEMBLY 2 Flow Schematic No Flow Option 32 of 48 Jan 2011 2010 8405 Rev E 115VAC NEUTRAL AUXILIARY 10A CIRCUIT BREAKER R CONTACTS Ik PRESSURE ALARM PC BOARD COMPRESSOR THERMAL DEVICE INSIDE A 3 115 Volt Electrical Schematic 2010 8405 Rev E Jan 2011 115 Volt Electrical Schematic R Red W White K Black BL Blue BR Brown GR Green YL Yellow PU Purple 33 of 48 230VAC NEUTRAL BL BR AUXILIARY 230 Volt Electrical CIRCUIT BREAKER R es Schematic POWER SWITCH R Red W White K Black BL Blue BR Brown GR Green YL Yellow PU Purple PRESSURE ALARM PC BOARD COMPRESSOR CTHERMAL DEVICE INSIDE 230 Volt Electrical Schematic 34 of 48 Jan 2011 2010 8405 Rev E HOT 230VAC HOT BL 230 Volt No Flow Option Electrical Schematic 5A CIRCUIT BREAKER 230V 10A FOR 115 POWER SWITCH TPST 230V DPST 115V R Red W White K Black BL Blue BR Brown GR Green YL Yellow PU Purple NOTE 230 Volt Version is Shown For 115 Volt Version 1 SUBSTITUTE BK FOR WHEREVER BL IS USED 2 SUBSTITUE W FOR WHEREVER BR IS USED 3
8. Repair electrical connection Alarm does not sound Faulty electrical connection Defective 1 0 ON OFF switch Defective buzzer Defective pressure sensor Repair electrical connection Replace 1 0 ON OFF switch Replace board Replace and test control board Flow fluctuates Improperly set or faulty product regulator Leak Worn compressor Defective flow valve Kinked tubing Check regulator setting clean repair or replace regulator Leak test Replace compressor Replace flow valve Check tubing that connects the top of the sieve beds 2010 8405 Rev E Jan 2011 27 of 48 Problem Probable Cause Solution Cabinet fan does not turn Defective cabinet fan Defective electrical connections Replace cabinet fan Check electrical connections Limited or low flow Restriction in humidifier or tubing Product regulator set too low Leak Weak compressor Air flow obstruction Replace humidifier or tubing Adjust regulator setting Leak test and repair leak Check system pressure and rebuild or exchange compressor Check Filter suction resonator and suction tube for obstruction Low concentration Compressor inlet filter is dirty or partially blocked System leak Faulty compressor Unit temperature too high Contaminated sieve beds Defective control valve Restriction in exhaust muffler Restriction i
9. and set the 1 0 ON OFF switch to the ON position If the unit has been stored for a prolonged period Allow unit to run for approximately 10 minutes to charge the capacitor and re test the unit This should immediately activate the intermittent audible alarm If it does not refer to the troubleshooting chart in Section 6 0 of this manual 2 4 Oxygen Concentration Test and Specification To ensure that the output of oxygen from the device is within specification you must perform an oxygen concentration test Test the unit upon delivery to a patient and at periodic intervals Home Service Providers based on their expertise and documentation may establish and implement their own plans for checking oxygen concentration Consult Nidek Medical s Service and Maintenance Log A 11 for the recommended intervals for testing 1 If an oxygen humidifier bottle is used remove it from the oxygen outlet 2010 8405 Rev E Jan 2011 9 of 48 2 Connect calibrated oxygen concentration analyzer to the oxygen outlet 3 Set the 1 0 ON OFF power switch to the ON position It takes approximately five minutes for the oxygen concentration to stabilize Take oxygen concentration readings over a period of several minutes to reduce any cyclic variations 4 Verify that the product flow rate delivered by the unit matches the patient s prescription and does not exceed the capacity of the unit 5 Disconnect the oxygen analyzer and reconnect the
10. in Section 2 5 of this manual e After performing the above steps remove the power cord from the wall outlet Actuate the 1 0 ON OFF switch to the ON position and note that the audible alarm sounds intermittently See Section 2 3 If the unit does not initially sound off plug the unit in and allow the unit to run approximately 10 minutes to charge the capacitor and repeat the test Move the switch to the 0 OFF position 3 Turn the flow valve adjustment knob clockwise until it stops wide open The flow valve should indicate 5 liters min and the output of the unit should be 5 liters min If not refer to Section 5 8 to adjust the product regulator 4 Perform an oxygen concentration test as described in Section 2 4 2 3 Alarm System The MARK 5 NUVO Lite Oxygen Concentrator is equipped with a capacitor powered alarm system which sounds an intermittent alarm when a power failure occurs and a continuous alarm when one or more cycle variables are not within specification It sounds an alarm if the high or low pressure indicators are activated or if the optional OCSI detects lower than predetermined levels of oxygen concentration The alarm remains on until you correct the alarm condition or you set the 1 0 ON OFF switch to the 0 OFF position Refer to Section 6 0 for a list of probable alarm causes 2 3 1 Power Failure Alarm Test To test the power failure alarm perform the following actions Unplug the power cord from the wall outlet
11. oxygen decreases Because this drop in oxygen production occurs over a long period of time preventive maintenance on the compressor is not required You can continue a patient s therapy on the MARK 5 Lite unit as long as the oxygen concentration level at the prescribed liter flow rate is within Nidek Medical s specification limits Refer to Section 2 4 Air Flow Meter 0 to 100 l min 1 bar Pressure Gauge Compressor Filter Restrictor 14 of 48 Jan 2011 2010 8405 Rev E e Sound Level The sound level is largely determined by the condition of the compressor s bearings There are four bearings located within the compressor that allow the inner components of the compressor to rotate If the bearings wear to the point that they become loose and noisy the compressor becomes noticeably loud and needs servicing The life of a compressor is determined primarily by its operating temperature It is extremely important that the inlet cooling air filters are cleaned and replaced as required 5 3 1 Compressor Replacement Remove Compressor Assembly To remove the compressor assembly for exchange follow the steps listed below Set the unit s 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the cabinet back Disconnect the suction tube and the discharge tube Disconnect the two compressor power cable leads and the two leads to the capacitor Disconnect the two springs from the compresso
12. power failure alarm as described in Section 2 3 of this manual e Deliver MARK 5 NUVO Lite units only to patients authorized by a physician s prescription The MARK 5 NUVO Lite must not be used as a life supporting or life sustaining device A backup supply of oxygen must be available e Instruct patients and patient caregivers how to use the MARK 5 NUVO Lite in conjunction with the Users Manual e Instruct patients and patient caregivers to notify their physicians and or Home Service Providers if they experience any signs of discomfort e Instruct each patient and patient caregivers how to perform routine maintenance of the 6 of 48 Jan 2011 2010 8405 Rev E cabinet air filter and how to check the alarm system Refer to Section3 2 Be available to service each patient at any time Maintain the MARK 5 NUVO Lite in accordance with Section 4 0 Repair components and replace parts only as outlined in this manual Use only Nidek Medical parts for replacement in MARK 5 NUVO Lite Oxygen Concentrators e Refer to the MARK 5 NUVO Lite Product Warranty if parts replacement is required within the warranty period 1 2 Important Notice and Symbol Explanations As you read the manual pay special attention to the WARNING CAUTION and NOTE messages They identify safety guidelines other important X information as follows Describes a hazard or unsafe practice that can result in VARNING severe bodily injury or death
13. D A 9 A PARTS CABINET BACK ASSEMBLY MODEL Jan 2011 gt P QA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA 2010 8405 Rev E 2010 8405 Rev E gt 1 28 3 30 l 1 Sal a t L Qn 4 1 L 10 MODULE NEW ASSEMBLY 5LPM Jan 2011 45 of 48 Part Reference Call Out Qty Unit of Number Number Part Description Required Measure 46 of 48 8400 1060 8400 1165 8400 1200 8400 1236 8400 1253 8644 9401 1 REGULATOR 2 PORT 2 FITTING VALVE 5 16 X3 8 3 VALVE ASSY 28 TEE ADAPTER NYLON 29 O RING REGULATOR TEE 204 30 PLUG 1 4 ODT PUSH IN A 10 A MODULE ASSEMBLY REPLACEMENT PARTS Jan 2011 A ll dl dl lc 2010 8405 Rev E Nidek Medical Oxygen Concentrator Service and Maintenance Log Model Number Initial Inspection 1 Upon receipt check the unit for shipping damage Notify shipping company if damaged 2 Verify that cabinet air filter and the inlet air filter are in place 3 Plug the unit into an electrical outlet turn the unit ON and check audible visual alarms 4 Set the flow meter flow control at the maximum recommended flow rate and allow the unit to run for 15 minutes 5 Using a calibrated oxygen analyzer verify concentration is greater than 87 percent Routine Service Check Perform routine servicing as shown in the chart below Record the activities p
14. Diagram 30 A 2 Standard Pneumatic Diagram 31 A 2 A No Flow Alarm Pneumatic Diagram 32 A 3 115 Volt Electrical Schematic 33 A 4 230 Volt Electrical Schematic 34 5 Electrical Schematic for No Flow Board 35 A 6 Electrical amp Compressor Assembly 36 A 7 Front Cabinet Standard Assembly 39 A 8 Front Cabinet OCSI Assembly 41 A 9 Back Cabinet Assembly 43 A 10 Module Assembly 45 2010 8405 Rev E Jan 2011 29 of 48 AIR INTAKE CONTROL VALVE PRESSURE UN OCSI INLET 858 RESIS BOARD FILTER 25 I 9 EXCHANGER E V E COMPRESSOR n MODULAR BED V ASSEMBLY A 1 Flow Schematic OCSI Option 30 of 48 Jan 2011 2010 8405 Rev E CONTROL VALVE AIR INTAKE YZZZZZ CHECK PRESSURE REGULATOR FILTER 3 PRESSURE owes 5 SENSOR EXCHANGER Ee ns PRODUCT V D V TER U E RELIEF VALVE i E T 8 i T D i CHECK VALVE COMPRESSOR 4 eit FLOW CONTROL OUTLET VALVE MODULAR BED ASSEMBLY 2 Flow Schematic Standard Non OCSI Option 2010 8405 Rev E Jan 2011 31 of 48 CONTROL VALVE AIR INTAKE CHECK PRESSURE 525 5 4 VALVE REGULATOR INLET 292 096 ORIFICE FILTER 4520 9 0
15. NESS 115 VOLT WIRING HARNESS UNIVERSAL VOLT CORD POWER EUROPLUG CORD POWER TYPE K PLUG BREAKER CIRCUIT 10 AMP 115 V BREAKER CIRCUIT 5 AMP 230 V SWITCH POWER UNIVERSAL SWITCH POWER 110 VOLT FAN 115V LOW NOISE FAN 230V LOW NOISE CAPACITOR 20uF P2 COMPR 2450 115V 60HZ 5LPM COMPR 2450 230V 50HZ 5LPM COMPR 2450 230V 60HZ 3LPM BAFFLE COMPRESSOR COOLING WASHER SPLIT RETAINING LIMITER COMPRESSOR CAP VINYL 3 16 GROMMET SPRING EYE FAN ISOLATOR KIT COMP PLATE ASSY A 6 A Jan 2011 N PSO HSH B EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA 37 of 48 Part Reference Call Out Qty Unit of Number Number Part Description Required Measure 8400 1010 1 BRACKET COMPRESSOR 1 EA 8400 1013 2 RETAINER SPRING 1 EA 8400 1016 3 SPRING EXTENSION 2 EA 8400 1030 4 GROMMET 75 IDX1 0 HOLE 2 EA 8400 1009 5 CAP VINYL 3 16 2 EA 8400 1017 6 GROMMET SPRING EYE 4 EA COMPRESSOR MOUNTING BRACKET PARTS 6 38 of 48 Jan 2011 2010 8405 Rev E El amp 9 qp p EN E A 7 CABINET FRONT ASSEMBLY STD Jan 2011 39 of 48 2010 8405 Rev E Part Reference Call Out Qty Unit of Number Number Part Description Required Measure 40 of 48 8400 0002 9251 1330 8400 1331 9251 1332 9251 1335 8400 1020
16. Nidek Medical Products Inc Mark 5 Nuvo Lite Oxygen Concentrator Service Manual Nidek Medical Products Inc 3949 Valley East Industrial Drive Birmingham Alabama 35217 USA Telephone 205 856 7200 24 Hour Fax 205 856 0533 Nidek Medical is a trademark of Nidek Medical Products Inc Mark 5 Nuvo Lite is a registered trademark of Nidek Medical Products Inc 2010 8405 Rev E Jan 2011 1 of 48 Table of Contents 2 General Safety Instructions Production and Use of Oxygen 4 Use and Maintenance of the Device 4 Standards and Regulations 5 Section 1 0 Introduction 1 1 Home Service Provider Responsibility 6 1 2 Important Notice and Symbol Explanations 7 1 3 Functional Specifications 7 Section 2 0 Operational Check and Concentration Test 2 1 Description of Operation 8 2 2 Operation Check 8 23 Alarm System 9 2 3 1 Power Failure Alarm test 9 24 Oxygen Concentration Test and Specification 9 25 No Oxygen Flow Alarm test Procedure 10 Section 3 0 Patient Instructions 3 1 General Instructions 10 3 2 Routine Maintenance by the Patient 11 3 2 1 Cleaning the Cabinet Air Filter 11 3 2 2 Checking the Alarm System Battery 11 Section 4 0 Home Service Provider Maintenance 4 1 Routine Maintenance 11 411 Cabinet Air Filter 11 4 1 2 Final Product Filter Replacement 12 4 1 3 Compressor Inlet Air Filter Replacement 12 4 1 4 Recording Maintenance 12 4 2 Cleaning Unit 13 4 2 1 Preparing for New Patient Use 13 Secti
17. OO9 Lite unit delivers up to 95 oxygen concentration at flow rates from 0 125 to 5 l min The remaining constituents of the product gas stream are nitrogen and argon both of which are part of the air we breathe are inert and are completely safe 22 Operational Check Nidek Medical runs each device through a burn in period and tests every MARK 5 NUVO Lite Oxygen Concentrator thoroughly after manufacture before releasing for shipment As the home service provider it is your responsibility to perform the following test to ensure that no damage occurred in shipping or handling 1 Open and inspect all concentrator cartons upon receipt Unpack each unit and remove it from its carton Inspect the unit itself for damage If the exterior of the carton is damaged or the unit itself is damaged note it on the freight bill signed by the driver 2 Plug in the power cord of the unit and set the 1 0 ON OFF switch to the ON position Check to see that the following occurs e The compressor runs listen for the sound e Exhausted cooling air flows out of the bottom rear of the unit 8 of 48 Jan 2011 2010 8405 Rev E e OPTIONAL for Units Equipped with Oxygen Concentration Status Indicator OCSI The OCSI green light remains off until the oxygen concentration reaches 85 3 82 2 for 50 Hz units approximately two minutes e OPTIONAL for Units Equipped with No Oxygen Flow Alarm Board The No Oxygen Flow board test should be preformed as
18. TLET LITE NUT 3 8 24 O2 OUTLET LITE FILTER FINAL PRODUCT VALVE CHECK 1 4 HOSE MPC A975 FOAM ANTI VIBRATION HOSE 5 32 X 11 32 X3 LG SILIC ADAPTER 1 4 ODT X3 16 HOSE HOSE 5 32 X 11 32 X2 LG SILIC HOSE 5 32 X11 32 X 7 LG SIL HOSE 5 32 X 11 32 X5 LONG SIL HOSE 1 8 ID X 1 4 OD 3 LG BOARD TIMING OMS 9V 5LPM SCREW PLASTITE 4X3 8 PAN HD SCREW 6 X32 X 5 LG FLUSH A 8 A PARTS Jan 2011 N O A de EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA 2010 8405 Rev E 13 C1J E 13 E y 91 1 j 1 SEE ASSEMBLY 0700 15 TA C 17 CTN i 1 C 1 14 3 1 1 2 1 1 SEE ASSEMBLY 0700 ii 13 4 TN SEE ASSEMBLY 0750 4 12 SEE ASSEMBLY 0750 1 A 9 CABINET BACK ASSEMBLY 2010 8405 Rev E Jan 2011 43 of 48 Part Reference Call Out Qty Unit of Number Number Part Description Required Measure 8400 0001 8400 0022 8400 1025 8400 1028 8400 1059 8400 0029 8400 0023 8400 1180 6814 9228 5190 2233 9030 6008 8400 0013 8400 1185 9250 1030 9250 1062 8400 0032 44 of 48 CABINET BACK RETAINER CORD FILTER CABINET INLET HOSE COMPRESSOR INLET ADAPTER FILTER RETAINER CORD BUCKLE RETAINER CORD RIVET FILTER AIR INLET ELBOW 1 2 DOUBLE BARB NYLON HOLDER TIE WRAP TIE WRAP 4 5 OVERALL SCREW 14x 1 5 LG PLASTITE RESONATOR INLET AIR GOMMET RUBBER TIE WRAP 14 LONG PLUG BUNGEE HOLE 3 16 POWER COR
19. d all routine maintenance and repairs performed on the MARK 5 NUVO Lite unit including hours and dates of service in Appendix 11 of this manual and online at www nidekmedical com under the Maintenance Log tab 12 of 48 Jan 2011 2010 8405 Rev E 4 2 Cleaning Unit Periodically use a damp cloth to wipe down the exterior case of the MARK 5 NUVO Lite If you use medical disinfectants be sure to follow manufacture s instructions 4 2 1 Preparing for New Patient Use When you remove the MARK 5 NUVO Lite from a patient s home always dispose of the used nasal cannula and humidifier bottle Inspect the humidifier tube and clean or replace as needed Replace the cabinet air filter between each patient s use or clean with warm soapy water if it is in good condition Clean this filter at least once per week or more frequently if operated in a dusty environment Retest the MARK 5 NUVOO Lite before you return it to your inventory 5 0 Service 5 1 Components The design of the Nidek Medical MARK 5 NUVO Lite Oxygen Concentrator allows for easy access and removal of most components This allows you to perform scheduled maintenance repair and replacement of parts with minimal time and effort The inlet air filter is conveniently located behind the cabinet air filter on the cabinet back CAUTION For your safety be sure to set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord before you service the MARK 5 NUVO Lite Ox
20. ded A 1 OCSI Pneumatic Diagram 30 Drawings A 2 Standard Pneumatic Diagram 31 A 2 A No Flow Alarm Pneumatic Diagram 32 A 3 115 Volt Electrical Schematic 33 A 4 230 Volt Electrical Schematic 34 5 Electrical Schematic for No Flow Board 35 A 6 Electrical amp Compressor Assembly 36 A 6 A Electrical amp Compressor Assembly Parts 37 A 6 B Compressor Mounting Bracket Parts 38 A 7 Front Cabinet Standard Assembly 39 A 7 A Front Cabinet Standard Assembly Parts 40 A 8 Front Cabinet OCSI Assembly 41 A 8 A Front Cabinet OCSI Assembly Parts 42 A 9 Back Cabinet Assembly 43 A 9 A Back Cabinet Assembly Parts 44 A 10 Module Assembly 45 A 10 A Module Assembly Parts 46 A 11 Maintenance Log 48 General Safety Instructions Production and use of oxygen Oxygen is not a flammable gas but accelerates the combustion of materials To prevent fire risks the MARK 5 NUVO Lite should be kept away from flames incandescent sources or sources of heat including cigarettes and combustible products such as oil grease solvents aerosols etc Do not use in an explosive atmosphere Prevent oxygen from accumulating on upholstered seats or any other fabric If the concentrator operates without being administered to a patient locate it so that the flow of product gas produced is dissipated into the air Locate the equipment in a free space filter to the rear and below which is well ventilated and free of fumes or atmospheric pollution Use a
21. e the cabinet back to locate the final product filter NOTE Observe the position of the filter before removal 3 Separate the silicone tubing from both sides of the filter 4 Install the new filter with the inlet side in the same position as before Push the tubing together so that it overlaps the barbs of the final product filter connections 5 Record information about the final product filter replacement in Appendix 11 of this manual and online at www nidekmedical com under the Maintenance Log tab 6 Reinstall the cabinet back 4 1 3 Inlet Air Filter Replacement The inlet air filter requires inspection at each patient visit The filter should be replaced every 2 years or more often depending on environment Set the unit 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the cabinet air filter to locate the inlet air filter Remove filter from the unit and replace with a new filter Record information about the filter replacement in Appendix 11 of this manual and online at www nidekmedical com under the Maintenance Log tab 5 Reinstall the cabinet air filter NOTE The filter may require more frequent cleaning if the MARK 5 NUVO Lite unit operates a harsh environment such as a house heated by wood kerosene or oil or one with excessive cooking cigarette smoke or atmospheric dust 4 1 4 Recording Maintenance As the Home Service Provider it is suggested that you recor
22. e tubes are fully inserted into the fittings to eliminate leaks To check for leaks take the following steps 1 Plug in the unit 2 Set the unit s 1 0 ON OFF switch to ON for three minutes with the flow meter closed to pressurize the system 3 Apply soapy water around the tubing connections at the valve check for leaks Caution There is an electrical shock hazard with the Power ON Be careful that no water contacts any of the electrical connections 16 of 48 Jan 2011 2010 8405 Rev E NOTE Even small leaks can affect concentrator performance and can cause contamination of the sieve Careful leak testing is important 5 6 Cabinet Fan Replacement The cabinet fan for the MARK 5 NUVOO9 Lite is located adjacent to the compressor Refer to the troubleshooting chart in Section 6 0 of this manual for instances where replacement of the fan may be required To replace the cabinet fan in the Mark5 Nuvo unit take the following steps Set the unit s 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the back cabinet Disconnect the fan leads Lift out the fan Install isolation foam around new fan Insert into cabinet and connect the fan leads Reinstall the back cabinet 01 Tom 5 7 Circuit Board Replacement There are two printed circuit boards within the MARK 5 Lite There is a printed circuit board that controls the alarm system functions and also a printed circuit board
23. ee that each patient receives the User s Guide Explain each step in the operation of the unit to the patient in reference to that guide 10 of 48 Jan 2011 2010 8405 Rev E 3 2 Routine Maintenance by the Patient To ensure accurate output and efficient operation of the unit the patient must perform two simple routine maintenance tasks Clean the cabinet air filter e Check the alarm system 3 2 1 Cleaning the Cabinet Air Filter NOTE The patient must clean this filter weekly as described below The filter may require daily cleaning if the MARK 5 NUVO Lite unit operates in a harsh environment such as a house heated by wood kerosene or oil or one with excessive cigarette smoke 1 Remove the dirty cabinet air filter from the back of the MARK 5 NUVO Lite unit Wash the dirty filter in warm water with household detergent and rinse Use a soft absorbent towel to remove excess water 4 Reinstall the clean cabinet air filter on the grille in the back of the unit Be careful that the filter edges are under the tabs 3 2 2 Checking the Power Alarm System See Procedure described in Paragraph 2 3 1 4 0 Home Service Provider Maintenance 4 1 Routine Maintenance The MARK 5 NUVOO9 Lite unit has three filters that require inspection and scheduled maintenance replacement To ensure that the output of oxygen from the unit is within specification you must perform an oxygen concentration test Test the unit upon deli
24. erformed in the log provided on the following page 1 Record the elapsed usage time in hours 2 Check oxygen concentration with a calibrated oxygen analyzer 3 Verify audible alarm and indicator light functions between patients and every two years 4 Inspect filters and replace as necessary Serial Number Between Patient Maintenance 1 Remove oxygen tubing cannula and humidifier bottle and discard 2 Wash or replace the humidifier tubing if used 3 Wash or replace the cabinet air filter 4 Clean the concentrator cabinet 5 Check oxygen concentration and flow If the unit performs within specification the final product filter does not need to be replaced between patients Patient Caregiver Maintenance 1 Inspect the Oxygen tubing cannula and humidifier bottle clean as needed according to manufacturer s instructions 2 Wash the cabinet air filter weekly with a mild detergent solution Dry before reinstalling onto the device The routine service intervals shown below depend on the conditions in which the devices are used They reflect the minimum recommendation when operated in a clean environment As conditions can vary widely the homecare provider or patient caregiver is responsible to determine the character of the environment in which the concentrator is to operate amaintenance schedule with intervals based on the environment in which the unit is operating functioning Standard Servicing I
25. he regulator body 12 Reinstall the regulator 13 Reset the product regulator as described in Section 5 8 1 5 9 Pressure Monitoring Board Replacement Standard Unit Non OCSI only The high and low pressure alarms are activated by a pressure transducer located on the alarm circuit board adjacent to the mains switch 5 10 5 10 1 Pow DO Bs Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the back cabinet Disconnect the 7 pin connector from the circuit board Disconnect tubing from pressure sensor by cutting tie wrap Remove the circuit board and replace with a new one Test the alarm system as described in Section 2 3 Reinstall the back cabinet Circuit Breaker Replacement Circuit Breaker Removal Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the cabinet back Disconnect the circuit breaker leads Unscrew the circuit breaker while you apply pressure to the circuit breaker retaining ring 5 10 2 Circuit Breaker Installation Follow the removal procedure for the circuit breaker in reverse order to install the new circuit breaker 2010 8405 Rev E Jan 2011 19 of 48 5 11 1 0 ON OFF Power Switch Replacement 5 11 1 1 0 ON OFF Power Switch Removal Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove both the back cabinet 3 Disconnect the 1 0 ON OFF switch leads from the back of t
26. he switch being careful to note the position of each 4 Push on the back of the power switch while holding in its four retaining tabs and remove the switch through the front of the control panel 5 11 2 1 0 ON OFF Power Switch Installation Follow the removal procedure for the 1 0 ON OFF power switch in reverse order to install a new power switch 5 12 Buzzer Replacement The buzzer is a fixed component on the circuit board and is not individually replaceable 5 13 Hour Meter Replacement Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the cabinet back Disconnect the hour meter leads Remove the hour meter from the front cabinet Install the new hour meter into its mounting location Make sure that the hour meter is mounted right side up Reconnect the hour meter leads Reinstall the cabinet back GQ NO 5 14 Flow Valve Replacement 5 14 1 Flow Valve Removal Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the cabinet back Remove the two hoses from the back of the flow valve Remove the knob from the flow valve and the two Philips screws below the knob Remove the flow valve 5 14 2 Flow Valve Installation To install a new flow valve follow the flow valve removal procedure in reverse order Then perform a leak test on the connections 20 of 48 Jan 2011 2010 8405 Rev E 5 15 6 0 6 1
27. humidifier bottle if used and any other equipment accessories that may be required 6 Adjust the flow valve knob to the prescribed flow rate Nidek Medical MARK 5 NUVO Lite Concentration Specifications Liter Flow Specification 2 l min greater than 90 5 l min 90 6 5 3 NOTE Do not measure oxygen concentration output after the product stream passes through a humidifier bottle Erroneous readings will result and your oxygen concentration measuring device might be damaged 2 5 No Oxygen Flow Alarm Test Procedure A No Oxygen Flow Alarm board is available as an option with the Nuvo Lite Oxygen Concentrator To test the function of No Flow alarm follow the instructions below Turn Concentrator on and allow the unit to reach normal operating purity Adjust the Oxygen Flow to desired flow rate Block the oxygen flow at the patient outlet A continuous audible alarm should sound as long as the Oxygen flow is blocked BoON 3 0 Patient Instructions 3 1 General Instructions It is important that patients thoroughly understand how to operate the Nidek Medical MARK 5 NUVO Lite unit This enables proper treatment as prescribed by a qualified licensed physician You must explain that the purpose of this therapy is to alleviate symptoms If patients experience any discomfort or the unit alarms they must notify their Home Service Provider and or physician immediately You as the Home Service Provider are responsible to s
28. maximum and minimum readings on the pressure test gauge The maximum reading should not exceed 34 psig 235 kPa The minimum reading should not be less than 10 psig 70 kPa NOTE When you turn the unit on it will take several minutes to reach normal operating pressures 2010 8405 Rev E Jan 2011 2 of 48 Product output to flow control valve Figure 6 1 1 normal operating configuration OCSI unit Inlet air source roduct output P tp from compressor to flow control valve Figure 6 1 2 normal operating configuration standard unit 22 of 48 Jan 2011 2010 8405 Rev E P2 test port test port Figure 6 1 3 configuration with test ports 6 1 1 High Operating Air Pressure P1 Higher than normal operating pressure may indicate any of the following gt Arestrictive exhaust muffler which does not allow the waste purge gas to exit the system freely gt Contaminated sieve beds Change the sieve beds 6 1 2 Low Operating Air Pressure P1 Lower than normal operating pressure may indicate any of the following gt A restriction in the suction resonator or inlet air filter this limits the amount of room air available to the compressor Disconnect the suction tube at the compressor and allow the unit to operate without the suction resonator to see if normal operating pressure returns gt improperly operating control valve Confirm that the control valve does not have a leak Aleakin
29. n suction resonator Replace inlet filter Leak test and repair leak Check system pressure and rebuild or replace compressor Blocked air intake or defective cabinet filter Check that P1 and P2 pressures are within range Replace sieve module Repair or replace sieve module Replace or clean exhaust muffler Check suction resonator and suction tube for obstruction and remove 28 of 48 Jan 2011 2010 8405 Rev E 6 5 Kit Oxygen Purity testing and Pressure Test Gauge The tools needed for you to properly service the MARK 5 NUVOO Lite unit are listed below gt Requires no special tools generally available tools including common pliers channel lock wire cutters needle nose pliers slotted head screwdriver long Phillips head screwdriver 8 inch adjustable wrench 7 16 inch socket 7 16 inch combination wrench 5 8 inch combination wrench and 3 8 inch combination wrench gt For checking the Oxygen purity at the Concentrator Nidek Medical recommends Part 6500 4220 gt An accurate pressure test gauge to take both P 1 and P 2 pressure readings on the MARK 5 NUVO Lite unit should be kept available at all times This gauge kit allows connections to the pressure test locations Kit for testing P1 amp P2 pressures with gauge supplied 6500 0051 Kit for testing P1 amp P2 pressures w o gauge supplied 6500 0052 Kit tools for Nuvo Lite 6500 0053 Appendices Drawings A 1 OCSI Pneumatic
30. nd Maintenance of the Device Use the electric cable provided and check that the voltage of the mains socket used complies with the electrical characteristics of the appliance indicated on the manufacturers plate on the rear of the device 4 of 48 Jan 2011 2010 8405 Rev E Do not use an extension cord or multiple sockets which can create sparks and therefore pose a fire risk Use of the MARK 5 NUVO Lite must be restricted solely to oxygen therapy on medical prescription in compliance with the daily rate and duration Use in other circumstances may represent a hazard to patient health Do not use in a specifically magnetic environment MRI etc The MARK 5 NUVOO Lite has an audible alarm intended to warn the user of any problems The user must determine the maximum distance away from the Nuvo based on the on the sound levels in the environment to ensure that the alarm is always audible Standards amp Regulations In compliance with UL60601 1 EN60601 1 para 6 82 b The manufacturer assembler installer or importer are not considered to be responsible for consequences or the safety reliability and characteristics of a device unless e the assembly extensions adjustments modifications or repairs have been performed by persons authorized by the manufacturer e the electrical installation of the corresponding premises complies with appropriate regulations and codes e the device is used in accordance with the instructions f
31. ntervals are shown below Intervals used by the homecare service provider and or patient caregiver should be more frequent when conditions of usage dictate Nidek Medical Oxygen Concentrator Routine Service Intervals Check Percent Oxygen Cabinet Air Filter Inlet Air Filter Final Product Filter Capacitor Concentration OCSI Models Wash the filter Inspect at each Every 15 000 hours each week in a patient visit Replace at each Replace at each or 3 years mild detergent Replace every 2 compressor compressor Std Models Every solution years or more often service module service module 5 000 hours or 1 Dry before depending on replacement replacement year reinstalling environment Please maintain a log of all maintenance activities performed on Serial this unit Number Model Date Hours 02 Alarms Additional Information Work Done Filter Changes Check Comments etc Inspection Prior to Putting Into Service In Service Checks Medical device regulations require users and service personnel to notify manufacturers of any incidents that if repeated could cause injury to any person email info nidekmedical com Please update maintenance log information upon each service at www nidekmedical com under the Maintenance tab
32. nutes to attain full concentration Positioning Operate the unit in an upright position maintaining at least six inches of open space on all sides for ventilation 2 0 Operational Check and Concentration Test 2 1 Description of Operation Air enters the MARK 5 NUVO Lite Oxygen Concentrator through an external cabinet air filter This filtered air enters the compressor via a suction tube and fine filter which quiets the suction sounds made by the compressor Pressurized air then exits the compressor and passes through a heat exchanger into a pair of 3 way solenoid valves The heat exchanger reduces the temperature of the compressed air Next the solenoid valve directs the air into one of two sieve beds that contain molecular sieve The special characteristic property of molecular sieve is that it physically attracts adsorbs nitrogen when air passes through this material thus enabling the production of high purity oxygen There are two sieve beds or adsorbent columns while one produces high purity oxygen the other is purged of the nitrogen it adsorbed collected while it was producing oxygen Each column produces oxygen for approximately five seconds and delivers it to the product storage volume tank integrated into the sieve module Oxygen exits the product storage tank through a pressure regulator flow control valve and final product filter The flow control valve controls the flow rate of oxygen delivered to the patient The MARK 5 NUV
33. on 5 0 Service 5 1 Components 13 5 2 Cabinet Removal 13 5 2 1 Removing Cabinet Back 13 5 2 2 Caster Replacement 13 2 of 48 Jan 2011 2010 8405 Rev E 5 3 Compressor 14 5 3 1 Compressor Replacement 15 5 3 2 Capacitor Replacement 15 5 4 Process Control Valve 16 5 5 Sieve Bed Replacement 16 5 5 1 Sieve Bed Removal 16 5 5 2 Sieve Bed Installation 16 5 6 Cabinet Fan Replacement 17 5 7 Circuit Board Replacement 17 5 7 1 Circuit Board Removal 17 5 7 2 Circuit Board Installation 18 5 8 Product Regulator Check and Setting 18 5 8 1 Product Regulator Cleaning or Rebuilding 19 5 9 Pressure Switch Replacement 19 5 10 Circuit Breaker Replacement 19 5 10 1 Circuit Breaker Removal 19 5 10 2 Circuit Breaker Installation 19 5 11 1 0 ON OFF Power Switch Replacement 20 5 11 1 1 0 ON OFF Power Switch Removal 20 5 11 2 1 0 ON OFF Power Switch Installation 20 5 12 Buzzer Replacement 20 5 13 Hour Meter Replacement 20 5 14 Flow Valve Replacement 20 5 14 1 Flow Valve Removal 20 5 14 2 Flow Valve Installation 20 5 15 Power Cord Replacement 21 Section 6 0 Troubleshooting 6 1 Air Pressure Test P1 21 6 1 1 High Air Pressure P1 23 6 1 2 Low Air Pressure P1 23 6 2 Product Pressure Test P2 24 6 2 1 Low Product Pressure 24 6 2 2 High Product Pressure 24 6 3 General Troubleshooting 25 6 4 Troubleshooting Chart 26 6 5 Tool Kit and Pressure Test Gauge 29 2010 8405 Rev E Jan 2011 3 of 48 Appendices Explo
34. or its use If the replacement parts used for periodic servicing by an approved technician do not comply with the manufacturer s specifications the manufacturer is absolved of all liability in the event of an incident Do not open the equipment when it is powered on risk of electrocution This device complies with the requirements of the FDA Quality System Regulation and EU Directive 93 42 EEC and 2007 47 EC but its operation may be affected by use in the surrounding area of appliances such as diathermy high frequency electro surgical instruments defibrillators short wave treatment appliances cell phones CB devices and other portables microwave ovens induction hot plates or remote control toys and more generally by electromagnetic interference exceeding the levels specified in standard IEC EN 60601 1 2 2001 As a regulated medical device both manufacturers and service providers have certain responsibilities regarding complaints FDA defines a complaint as any written electronic or oral communication that alleges deficiencies related to the identity quality durability reliability safety effectiveness or performance of a device that has been released for distribution 2010 8405 Rev E Jan 2011 5 of 48 Service providers have a responsibility to evaluate any complaints received from their direct customers Ref CFR 820 198 Nidek Medical does not have direct links to your customers Your evaluation should include the foll
35. owing e Determine if the complaint warrants action by Nidek Medical If NO resolve the complaint with your customer e If YES contact Nidek Medical customer service e Work with Nidek Medical to resolve all complaints 1 0 Introduction 1 1 Home Service Provider Responsibility All Home Service Providers of the Nidek Medical MARK 5 NUVO Lite Oxygen Concentrator must assume responsibilities for handling operational check out patient instruction and maintenance These responsibilities are outlined below and throughout this manual WARNING MARK 5 NUVO Lite units must not be used for or with any life supporting or life sustaining applications Patients unable to communicate discomfort while using this device may require additional monitoring Advise patients to immediately notify their Home Service Provider s and or physician s in case of an alarm or any discomfort As a Home Service Provider you must do all of the following e Inspect the condition of each MARK 5 NUVOO Lite unit immediately upon delivery to your business location Note any sign of damage external or internal on the delivery receipt and report it directly to both the freight company and Nidek Medical Products Inc immediately e Check the operation of each MARK 5 NUVO Lite before delivery to a patient Always operate the unit for a reasonable length of time and check that the oxygen concentration level is within specifications as referred to in Section 2 4 Test the
36. r support plate Slide the compressor assembly from the cabinet Remove compressor springs from the compressor with the two screws Remove heat exchanger from compressor Remove the heat exchanger fitting from the compressor Qr ds Ol oN Compressor Assembly Installation To install a new compressor follow the steps listed below 1 Perform the compressor removal procedure in reverse order 2 Leak test all connections 5 3 2 Capacitor Replacement The capacitor helps the compressor to start and run more efficiently If the compressor cannot start the capacitor may be defective and require replacement The capacitor should be replaced at each compressor service module replacement To replace the capacitor take the following steps 1 Set the unit s 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the cabinet back 3 Disconnect the two leads to the capacitor and clip the tie wrap securing the capacitor 4 To install the new capacitor connect the leads and replace the capacitor and install a new tie wrap 5 Clip excess after securing capacitor 2010 8405 Rev E Jan 2011 15 of 48 5 4 Process Control Valve The MARK 5 NUVO Lite uses a solenoid powered poppet valve assembly to control the air separation process There is a feed port that connects to the compressor and an exhaust port that discharges through an integral exhaust muffler There are three possible valve states as follows
37. s Foams N z the Check Control Compressor 115 P Normal Air Aa Pressure ES cmd T Measure the Oxygen Pressure M N I in ie Low Pressure High Pressure J p N fi i N Replace for Muffler eaks N Foams Check the Replace Control Sieve 7 y Valve N Module gt lt Normal Pressure A Check for leaks at the regulator outlet product tubing oxygen outlet 26 of 48 Jan 2011 2010 8405 Rev E Problem Probable Cause Solution Compressor runs with intermittent high pressure alarm and low oxygen concentration Defective sieve beds Restriction in exhaust muffler Defective valve Replace sieve beds Replace or clean muffler Replace sieve module Compressor relief valve releases popping sound Defective control valve Contaminated sieve beds Defective relief valve Replace sieve module Replace sieve module Replace sieve module Replace relief valve Constant alarm with 1 0 ON OFF switch in ON position Circuit breaker repeatedly trips Defective circuit breaker Defective capacitor Defective compressor Defective circuit board Faulty electrical connection Replace circuit breaker Replace capacitor Replace compressor Replace circuit board
38. t Pressure P2 Lower than normal operating pressure may indicate any of the following gt An inlet air filter that limits the amount of room air available to the compressor Disconnect the suction tube at the compressor and allow the unit to operate without the suction resonator to see if normal operating pressure returns An improperly operating control valve Confirm that the control valve does not have a leak gt Aleak the unit which allows system pressure to escape Leak test the unit compressor with reduced output Ensure that the concentration level at the desired liter flow is within specifications listed in Section 2 4 If it is below specification replace or repair the compressor 6 2 2 High Product Pressure P2 Higher than normal operating pressure may indicate any of the following Arestrictive exhaust muffler which does not allow the waste purge gas to exit the system freely Check exhaust muffler for any restrictions Contaminated sieve beds Change the sieve beds 24 of 48 Jan 2011 2010 8405 Rev E 6 3 General Troubleshooting Before reviewing the troubleshooting chart the following steps may be useful to isolate any malfunctions 1 2 Turn the concentrator on If unit does not turn on refer to troubleshooting chart Make sure all filters are clean Connect test pressure gauge to the outlet fitting of the unit The pressure should read 7 1 psig 49 kPa 10
39. that controls the timing logic for the solenoid valves Consult the troubleshooting chart in Section 6 0 to determine which and when to replace the one of the printed circuit boards CAUTION The Printed Circuit Boards PCB contain components that are sensitive to electrostatic discharge ESD that can damage the board if not handled properly As when handling any ESD sensitive PCB observe standard ESD safety procedures These procedures include the following Handle the PCB by the edges only Work a grounded ESD mat Wear a grounded wrist strap Store PCB in anti static bags only 5 7 1 Alarm Circuit Board Removal Note that the Circuit Board on the OCSI unit is different to the Circuit Board on the standard unit 1 Set the I O ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the cabinet back 3 Disconnect the 7 pin connector from the upper circuit board 4 Disconnect tubing from each end of the black sensor tube on the OCSI unit noting their position and orientation 2010 8405 Rev E Jan 2011 17 of 48 5 Non OCSI units Cut tie wrap and remove pressure sensor line 6 Remove the screws that attach the board to the front cabinet 7 Remove the circuit board NOTE Handle the new circuit board only by the edges to prevent electrostatic damage to the unit For Reinstallation reverse the above procedure 5 7 2 Timing Circuit Board Removal Set the 1 0 ON OFF switch
40. the unit which allows system pressure to escape Leak test the unit Acompressor with reduced output 2010 8405 Rev E Jan 2011 23 of 48 Ensure that the concentration level at the desired liter flow is within specifications listed in section 2 4 If it is below specifications replace or repair the compressor 6 2 Product Pressure Test P2 Testing the product pressure is a useful diagnostic tool when a concentrator has low purity and requires servicing Units functioning normally do not require operating tests Use the following procedure to test the product pressure of the unit 1 Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the cabinet rear Remove the cap from the regulator test port and install the test port 6 2 1 tee Figure 6 1 1 amp Remove the cap from the regulator test port and install the test port tee Figure 6 1 1 amp 6 1 2 shows the normal operating configurations for each type of unit Figure 6 1 3 shows the installation of the test ports Connect the pressure test gauge to the P2 test port Plug in the power cord and set the 1 0 ON OFF power switch to the ON position Set the flow meter to 5 l min and allow the unit to run at least five minutes Observe the maximum and minimum readings on the pressure test gauge The maximum reading should not exceed 32 psig 220kPa The minimum reading should not be less than 9 psig 62 kPa Low Produc
41. to the 0 OFF position and unplug the power 2 Remove the cabinet back 3 Disconnect the 6 and the 4 pin connectors as well as the 6 spade connectors from the Timing Board Brown 220V White 110V wires towards the module side and Blue 220V Black 110V wires toward the compressor side 4 Remove the mounting screws 5 Remove the circuit board NOTE Handle the new circuit board only by the edges to prevent electrostatic damage to the unit For Reinstallation reverse the above procedure 5 7 3 MARK 5 Lite units produced after 1 June 2010 have a PCB that includes the functions of both the Alarm Circuit board and the Timing Board that were used in earlier units The new board includes two LED s that are visible inside the unit They have been added to assist the service technician in determining that the solenoid valves have power to them and are cycling Also the new board flashes the green LED during the startup phase to indicate that the device has power The flashing green LED is continuous when oxygen concentration reaches the specified level 5 8 Product Regulator Check and Setting The product regulator enables you to set the maximum flow of oxygen output by the MARK 5 NUVO amp Lite unit To check for proper adjustment of the product regulator take the following steps GQ IN o Set the 1 0 ON OFF switch to the ON position Allow the unit to run for a few minutes Connect a press
42. ure gauge directly to the patient outlet The pressure should read 7 1 psig 49 kPa 1096 If it requires adjustment remove the cabinet back and lift out the module enough to access the regulator Adjust the regulator as necessary Turn the knob clockwise to increase the output pressure Requires a 3 32 hex wrench Reinsert the module assembly and reinstall the cabinet back 18 of 48 Jan 2011 2010 8405 Rev E 5 8 4 Product Regulator Cleaning or Rebuilding Clean or rebuild the product regulator if the regulator cannot be adjusted BON oo 7 8 9 10 11 Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the back cabinet Remove the regulator from the tee on top of the solenoid valve assembly Adjust the product regulator fully counterclockwise to unload the spring This makes disassembly and reassembly easier Remove the diaphragm Clean or replace it Use a hex head screwdriver to unscrew the diaphragm stem guide located in the center of the regulator body to gain access to the seat Remove the seat Be careful not to lose the spring located behind the seat Replace the seat or clean by blowing clean air on and around it With the spring behind the seat screw the diaphragm stem guide back into the body of the regulator Do not over tighten Install a clean or replacement diaphragm Put the large spring and slip ring into the bonnet and screw the bonnet onto t
43. very to a patient and at periodic intervals Home Service Providers based on their expertise and documentation should establish and implement their own practices for checking oxygen concentration The interval established may be longer or shorter than 90 days which is the default time period recommended for providers who do not choose to establish their own method Nidek Medical does not require preventive maintenance on the concentrator You do not need to perform any maintenance as long as the MARK 5 Lite unit remains within specifications at the prescribed flow rate Refer to Section 2 4 4 1 1 Cabinet Air Filter The external cabinet air filter is located on the back of the unit You can easily remove it by hand Instruct the patient to clean this filter weekly Refer to Section 3 2 1 2010 8405 Rev E Jan 2011 11 of 48 The filter may require more frequent cleaning if the MARK 5 NUVO Lite unit operates in a harsh environment such as a house heated by wood kerosene or oil or one with excessive cooking cigarette smoke or atmospheric dust 4 1 2 Final Product Filter Replacement The final product filter does not require periodic replacement it needs to be replaced only if it restricts oxygen flow It is suggested that it be replaced whenever the sieve module is repaired or replaced and after the compressor is rebuilt 1 Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remov
44. ygen Concentrator NOTE Record all scheduled maintenance on the Maintenance Log found in Appendix 11 Refer to Section 4 1 4 5 2 Cabinet Removal 5 2 1 Removing Cabinet Back Lay the device on its front to access the cabinet back remove four screws two at the top near the handle and two near the bottom of the cabinet 5 2 2 Caster Replacement The casters are a push in type that does not require a fastener Lay the device on its back to access the casters from the bottom Pull them straight out away from the bottom 2010 8405 Rev E Jan 2011 13 of 48 5 3 Compressor The compressor is the pump within the oxygen concentrator that supplies air to the separation process performed by the sieve beds The pressure generated by the compressor forces oxygen to flow out of the top of the sieve columns The compressor is the likely cause of two potential specific problems a An insufficient amount of air is supplied to the process and b An excessive sound level e Air Supply Compressor output refers to how much compressed air the compressor can produce This depends upon the model of the compressor length of stroke piston diameter speed of rotation and condition of seals The cup seals form the seal between the piston and the cylinder wall As the cup seals wear the output begins to gradually decrease This reduction in compressor output results in less air and thus less oxygen entering the sieve beds Therefore the production of
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