SERVICE PROCEDURES
Contents
1. The following replacement parts are required e 1 x Synchronous Motor e 1 xCable Tie Gently loosen the top and bottom housing Once loose hold the power socket IEC connector to prevent from catching while lifting the top cover and leaning it back on your work surface Be careful not to drag the internal wires and tubing during this process Before continuing ensure no electrical leads are stretched and that all electrical connectors on the Printed Circuit Board PCB are firmly connected You may need to prop the top housing case to prevent strain on the electrical cords base ofthe unit Using Wire Clippers or a sharp knife carefully cut and remove the cable tie securing the power leads between the two halves of the unit 5 j rr RA aaa ee Rr av Using a soft cloth to protect the unit from damage place the Control Unit on a level work surface with base facing upwards Trace the power lead running from underneath the synchronous motor to its connection on the circuit board Disconnect this lead from the circuit board by carefully pulling the plastic casing not the wiring and gently remove the lead from under the compressor cage and leave it free Use a Phillips Head Screwdriver to remove the four screws that secure the housing Place the screws and washers in a safe place such as small container or jar to prevent loss Hold the unit firmly and turn it over face up2. _ l Use a Phillips Head While holding the small Unpack the replacement Ensure the flat side of the teeth screwdriver to unscrew 5 silver bracket at the top of hook and lay in position sit against the unit the three screws that secure the spring with one hand use over the plastic bracket the plastic housing Place the the head of the hook to push screws in a safe place such against the spring and release as small container or jar to the damaged hook The hook prevent loss Lift the plastic will slide free from the spring housing to reveal the spring and base mount connection 25 SERVICE PROCEDURES Hanging Hook Replacement 220DS 4 pipe Control Unit Slide the hook into the Insert the U shaped Replace the plastic Replace the foam spring and push the hook silver bracket over the housing and use the 1 mounting strip into the base mount shaft between the teeth and Phillios Head Screwdriver to by aligning sticky side over the plastic bracket replace the three screws to housing and firmly pressing to secure adhere If the original foam mounting is destroyed peel protective back off new foam mounting and adhere 1 Check the smooth movement of the hooks 26 SERVICE PROCEDURES oubleshootin The following section outlines a list of common troubleshooting issues together with recommended initial checks and subsequent Technical Service steps and procedures to follow if there is a suspected fault in the System A I
3. base of the unit Insert anew fuse or the 5 undamaged fuse into the plug Push against the force of the spring and turn clockwise with the screwdriver quarter turn Using a level surface place the Control Unit on its base with easy access to the black round fuse cap located on the side of the unit closest to the connectors d je 6ipwiniwaid gt A lt I gt Y A O mmm Ore O Reconnect the power cord to the Control Unit and switch on power supply If Control Unit still fails to operate the problem may be due to a faulty circuit board Proceed to Printed Circuit Board Check procedure Insert a small screwdriver into the groove on the fuse cap and turn counter clockwise in the direction of the arrow quarter turn to remove the fuse plug and single fuse If the unit switches on but fuse blows again repeat the steps to replace the damaged fuse but do not reconnect power as damage may be due toa faulty compressor Proceed to Standard Pressure Test procedure SERVICE PROCEDURES Printed Circuit Board PCB Check 220D5 4 pipe Control Unit Testing for a faulty circuit board by piggybacking a working spare If the Control Unit still fails to operate after checking and replacing a damaged fuse the next step is to test the Printed Circuit Board PCB for failure To determine if the PCB has failed always test the Control Unit using a working spare When handling the
4. 120VAC 60Hz 0 3A T1AL250V SAA 1 Timing motor working as rotary valve Digital control system 14 Watt typical 20 Watt maximum Non continuous Distributor valve supplying air to the inflatable cells 12 minutes or 10 minutes 18 60 2 mmHg in 8 steps 6mmHg per step 2or4 180Kg Air humidity 30 to 70 Ambient temperature 10 C to 40 C Air humidity 10 to 70 Ambient temperature 10 C to 60 C Class ll equipment Type B applied part IPXO Not category AP APG equipment 33 SERVICE PROCEDURES Declarations Declaration electromagnetic emissions for all ME EQUIPMENT and ME SYSTEMS Guidance and manufacture s declaration electromagnetic emission This Control Unit is intended for use in the electromagnetic environment specified below Emission test Compliance Electromagnetic environment guidance RF emissions This Control Unit only uses RF energy CISPR 11 for its internal function Therefore its RF emissions are very low and are not likely to cause any interference in nearby electronic equipment RF emission Class B This Control Unit is suitable suitable CISPR 11 for use in all establishments including a domestic establishments and those Harmonic emissions ClassA directly connected to the public low IEC 61000 3 2 voltage power supply network that Voltage fluctuations flicker emissions Complies supplies buildings used for domestic IEC 61000 3 3 purposes Declaration electromagnetic
5. Head Screwdriver to remove the four screws that Secure the housing Place the screws and washers in a safe place such as small container or jar to prevent loss Hold the unit firmly and turn it over face upwards on its base Gently loosen the top and bottom housing Once loose hold the power socket IEC connector to prevent from catching while lifting the top cover and leaning it back on your work surface Be careful not to drag the 5 internal wires and tubing during this process Before continuing ensure no electrical leads are stretched and that all electrical connectors on the Printed Circuit Board PCB are firmly connected You may need to prop the top housing case to prevent strain on the electrical cords Lift the bottom housing up to access the base of the unit For damaged feet use the Needle Nose Pliers to hold the rubber base and remove from the casing Unpack the replacement rubber feet Insert the long nose of the rubber foot into the empty socket on the base of the unit pushing from outside in 23 Rubber Feet Replacement SERVICE PROCEDURES 220DS 4 pipe Control Unit Once through the hole lay the bottom housing flat and use the Needle Nose Pliers to gently pull through until the rim of the foot locks into place Move gently from side to side while pulling rather than applying direct upward force to avoid snapping the nose of the replacement foot 1 2 Use a Phillips
6. Head Screwdriver to replace the four screws plus washers and tighten to secure the housing together Before closing the housing make sure all power leads and pipes are free from the side edges Ensure the regulator tubing will not kink when the top cover is closed 1 Align the top and bottom housing before slowly pushing closed Ensure the seal is properly aligned around the housing including the air pipe connectors fuses and power connector 1 1 Holding the top and bottom housing firmly together turn the Control Unit upside down with base facing upwards 24 SERVICE PROCEDURES Hanging Hook Replacement 220DS 4 pipe Control Unit Replacing the hanging hooks on the base of the unit Very rarely the metal hanging hooks located on the base of the Control Unit will become damaged or worn Either one or both hooks can be replaced ye36ipuiniwaid Ss A II Y Osman Drm O The following tools are Switch off power supply Using a soft cloth to Gently peel back the two required to the Control Unit protect the unit from foam mounting strips e Philips Head Screwdriver disconnect Air Pipes and damage place the Control Unit to reveal the plastic housing l remove the power cord from on a level work surface with beneath Me TOLOWING replacement the electrical socket in the base facing upwards If careful enough the foam parts are required mounts can be reused base ofthe unit e Hanging Hooks x _ MA
7. PCB anti static gloves or other anti static precautions should be used to protect the PCB from static The following tools are required e Phillips Head Screwdriver e Wire Clippers The following spare parts are required e 1xPCB in known working condition Gently loosen the top and bottom housing Once loose hold the power socket IEC connector to prevent from catching while lifting the top cover and leaning it back on your work surface eybipunivasd h A Sio Y Q um Oen Switch off power supply to the Control Unit disconnect the Air Pipes and remove the power cord from the electrical socket in the base of the unit Be careful not to drag the internal wires and tubing during this process Before continuing ensure no electrical leads are stretched and that all electrical connectors on the Printed Circuit Board PCB are firmly connected You may need to prop the top housing case to prevent strain on the electrical cords Using a soft cloth to protect the unit from damage place the Control Unit on a level work surface with base facing upwards Disconnect the four 5 electronic power leads by cutting the cable ties that secure the leads to the PCB Carefully pull the plastic casing not the wiring to disconnect Use a Phillips Head Screwdriver to remove the four screws that secure the housing Place the screws and washers in a safe place such as small container or jar to pre
8. as determined by an electromagnetic site survey should be less than the compliance level in each frequency range Interference may occur inthe vicinity of equipment marked o with the following symbol NOTE 1 At 80 MHz and 800 MHz the higher frequency range applies NOTE 2 These guidelines may not apply in all situations Electromagnetic propagation is affected by absorption and reflection from structures objects and people a Field strengths from fixed transmitters such as base stations for radio cellular cordless telephones and land mobile radios amateur radio AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy lo assess the electromagnetic environment due to fixed RF transmitters an electromagnetic site survey should be considered If the measured field strength in the location in which this Control Unit is used exceeds the applicable RF compliance level above the Control Unit should be observed to verify normal operation If abnormal performance is observed additional measures may be necessary such as reorienting or relocating the Control Unit b Over the frequency range 150 KHz to 80 MHz field strengths should be less than 3 V m 35 SERVICE PROCEDURES Declarations Recommended separation distances between portable and mobile RF communications equipment and the EQUIPMENT or SYSTEM for ME EQUIPMENT or ME SYSTEM that are not LIFE SUPPORTING Recommended separation distances b
9. immunity Guidance and manufacture s declaration electromagnetic immunity This Control Unit is intended for use in the electromagnetic environment specified below Immunity test IEC 60601 test level Compliance level Electromagnetic environment guidance Electrostatic discharge ESD IEC 61000 4 2 Electrical fast transient burst IEC 61000 4 4 Surge IEC 61000 4 5 Voltage dips short interruptions and voltage variations on power supply input lines EC 61000 4 11 Power frequency 50Hz magnetic field IEC 61000 4 8 6 kV contact 8 kV air 2 kV for power supply lines 1 kV line s to line s lt 5 U gt 95 dip in U for 0 5 cycle 40 U 60 dip in U_ for 5 cycles 70 U 30 dip in UT for 25 cycles lt 5 U gt 95 dip in U_ for 5 sec 6 kV contact 8 kV air 2kV for power supply lines 1 KV differential mode lt 5 U gt 95 dip in U for 0 5 cycle 40 U 60 dip in U_ for 5 cycles 70 U 30 dip in U for 25 cycles lt 5 U gt 95 dip in U_ for 5 sec U is the a c mains voltage prior to application of the test level Floors should be wood concrete or ceramic tile If floor are covered with synthetic material the relative humidity should be at least 30 Mains power quality should be that of atypical commercial or hospital environment Mains power quality should be that of atypical commercial or hospital environment Mains power
10. normal operating status please follow the steps below to isolate the cause of the problem and make the relevant repair 18 The electronically controlled Control Unit provides the air supply to the Mattress The unit is operated by a digital touch membrane on the front display panel which controls eight comfort pressure settings Alternating or Static Mode for treatment or transfers respectively Max Firm mode for rapid inflation to maximum pressure to create a firm surface and Control Unit Lockout to prevent accidental changes to the settings The Alarm LED indicator and Alarm Mute completes the operator controls The visible and audible alarm function has anumber of LED indication sequences depending on the cause of the failure On the side of the unit are four air connectors for quick connection to the four hole handle The mains supply to the unit Printed Circuit Board PCB ompresso Ompre Or Alternation Timer Moto tatic A ator Powe ocke IEC Connector SERVICE PROCEDURES 220DS 4 pipe Control Unit can be easily disconnected and is designed to detach if pulled too firmly protecting the internal wiring from damage The quality ofthe Control Unit underpins the reliability and pressure reduction capabilities of the System At the centre of the Control Unit lies the compressor which runs at arapid and continuous rate whenever the unit is operational Continuous rapid movement places compressor mater
11. pressure to lead to the circuit board and all power leads and pipes ensure a firm fit attach anew cable tie to are free from the side edges secure all power leads as Ensure the regulator tubing will before not kink when the top cover is 1 Reattach the air pipe 1 D Reconnect the compressor power closed eybipuniald Ss AIM Y O mm Or 1 8 Holding the top and 1 9 Use a Phillips Head 2 Connect the Control bottom housing firmly Screwdriver to Unit to mains power together turn the Control Unit replace the four screws plus and switch on the Control Unit upside down with base facing washersandtightentosecure to confirm operation upwards the housing together 14 synchronous Motor Replacement SERVICE PROCEDURES 220DS 4 pipe Control Unit Replacing a faulty synchronous motor The synchronous motor runs the rotovalve that operates the timing mechanism for the alternation cycle Ifthe rotovalve becomes worn or damaged it no longer spins smoothly and the unit will emit a distinct grinding noise If you hear an uncharacteristic noise from the motor when the Control Unit is switched on the synchronous motor needs to be replaced e Phillips Head Screwdriver je 61puiniwaid N A pie Y O mm Om O to the Control Unit disconnect the Air Pipes and Wire Clippers or sharp knife remove the power cord from e e Flat Head Screwdriver small the electrical socket in the o 7 32 Inch Socket Wrench
12. 73 Email aedaWaeda com http www aeda com
13. SERVICE PROCEDURES Control Unit 220DS 4 Pipe Handle AEDA HEALTHCARE Contents SERVICE PROCEDURES 220DS 4 pipe Control Unit cos oo e 0 kt 6o 0 b 0 o 0 0 0 0 0 e o o oo o o cs o oo feo Voce foso 0 0 02 0 0 0 0 0 0 0 0 Basic System Checks Fuse Check and Replacement ee cooo t lot o oo o o o e o o eo o o do e e d o 9 yo ee o o 7d 10000 00 00 0 nn Veero oo o o o o T ore Te cc o do 0 0 0 e o oo ooo oo ooo oo wA ee e To 90 Doc G aR oo o oo Connector Replacemen Connector Plate Replacement So o eo 0 0 0 0 0600 o to 000000000000000000000000000000 u 00000 e e oo oo oo o o o o to 9 00 0 903003970 9 000 070 00000000 sra 1 0 0 0 0000000000000 coos sep a A cf pi 7 oc 0 92 01 20 0bh bo o o 0 0 0 1 ooo ooo ems ome ome eos o T onono o cc o o 9 oooo noo ono o o o ooo e o of o o o o o o ce o o oo o o o pe o o o Too ot o o o 1 1 00 0000 0 0000000000 0 u 0 4x0 0 b0 do do 0 lt 02 o 2 o o 0 12 o 0 eoeecee ee ee oro ce o 0 o o o eo o 5 ne 6 c oo
14. ainst the flow of air from the unit Slowly close the valve until the Sphygmomanometer pressure reading reaches 30 mmHg At 30 mmHg the ball bearing inside the Air Flow Meter should drop to a minimum of 3 litres per minute SERVICE PROCEDURES 220DS 4 pipe Control Unit To check operational capacity ofthe compressor test each pressure setting as outlined in the following steps Continue to increase C back pressure resistance Slowly close the valve on the Air Flow Meter until the Sphygmomanometer pressure reading reaches 60 mmHg At 60 mmHg the ball bearing inside the Air Flow Meter should drop to a minimum of 2 litres per minute Base Pressure Air Flow The table above summarises the expected pressure and air flow measurements If air flow measurements fail to meet the specified minimum levels during any stage of the oressure test the compressor is not operating at full capacity and needs to be replaced Remember that a 30 minute warm up period is required Finish testing by fully closing the Air Flow Meter valve maximum resistance The ball bearing inside the Air Flow Meter should drop to O and the Sohygmomanometer pressure reading should rise to 120 mmHg 11 Standard Pressure Test SN MC09030397 100 120 50 MY 220v 24 y 2 E If air flow measurements e fail to meet the specified minimum levels during any stage of the pressure test the compressor is not operati
15. are firmly connected You may need to prop the top housing case to prevent strain on the electrical cords such as small container or jar to prevent loss Hold the unit firmly and turn it over face upwards on its base 10 Standard Pressure Test Reconnect the Control 5 Unit to mains power and switch on The unit must run for a minimum of 30 minutes to warm up before pressure testing commences Leave the unit in a safe place during the warm up period Ensure the equipment a is set to free flow mode i e no resistance or back pressure against the full flow of air from the compressor The valve at the front of the Air Flow Meter should be fully open If not turn clockwise to open the valve to maximum With the system in free flow mode the ball bearing inside the Air Flow Meter should rise to a minimum of 4 5 litres per minute The Sphygmomanometer pressure reading should be low approximately 10 mmHg After the 30 minute warm up period has elapsed detach the internal air pipe from the compressor some force may be required and replace with the air pipe from the Pressure Test Equipment for directly connection to the compressor Push the air pipe firmly until it fully covers the connector Slowly close the valve on the Air Flow Meter to reduce airflow air and simulate back pressure i e to emulate the weight of a patient lying on the mattress which forces pressure back ag
16. aught in the process Dispose of the faulty compressor in an environmentally safe manner 1 Unpack the replacement compressor Carefully thread the power lead through the base of the cage before sliding the new compressor into position with power lead closest to the PCB and air pipe connector positioned towards base Replace the two screws before tightening the loosened screws 1 Securethe compressor to the metal cage by connecting the eight new rubber mounts starting with four mounts on one side of the cage bottom followed by top then four mounts on opposite side When connecting mounts ithelos to prop or hold the compressor within the cage to better align the mount holes Insert the tapered end of the rubber mount through the corresponding hole in the cage gently pushing through until the mount can be twisted around the nose of the pliers and pulled firmly into place 13 Compressor Replacement 1 Visually check that each mount is secure gently move the compressor within the cage to ensure all mounts are connected and the compressor is correctly suspended with the metal cage 1 Align the top and bottom housing before slowly pushing closed Ensure the seal is properly aligned around the housing including the air pipe connectors fuses and power connector SERVICE PROCEDURES 220DS 4 pipe Control Unit 1 6 Before closing the housing make sure to the compressor using gentle
17. cal in one hand the base of the connector at from catching while lifting the leads are stretched and that top of air pipe and twisting top cover and leaning it back all electrical connectors on the counter clockwise to release on your work surface Printed Circuit Board PCB the locking mechanism are firmly connected You may need to prop the top housing case to prevent strain on the electrical cords 18 Connector Replacement Detach the air pipe from the damaged connector by pulling firmly Unpack the replacement connector and oress firmly to reattach the internal air pipe as before Ensure the pipe is secure and fully buttressed against the base of the connector You may want to carefully secure pipe using a gentle adhesive tape or cable tie to bind Align the top and 1 bottom housing before slowly pushing closed Ensure the seal is properly aligned around the housing including the air pipe connectors fuses and power connector Refit the connector to the Connector Plate twisting clockwise to lock into place Repeat this process for other damaged connectors 1 3 Holding the top and bottom housing firmly together turn the Control Unit upside down with base facing upwards SERVICE PROCEDURES 220DS 4 pipe Control Unit 1 0 Reposition the Connector Plate into the side of the control unit Ensure the Connector Plate retains the correct orientation with the groove that aligns with the tongue
18. cing this test ye 6ipwniwaid 9 AOpen Y m rn D The following tools are Pressure Test Equipment Set Up Switch off power supply required One air pipe is connected to the rear of the Sohygmomanometer to the Control Unit e Phillips Head Screwdriver and another to the base of the Air Flow Meter These two air pipes diSconneci the Air Pipes and e Pressure Test Equipment are then connected by a Y piece to form a single air pipe outlet remove the power cord trom gt Sphygmomanometer Check all pipe attachments are secure before commencingthe the electrical SOCKEL inthe mmHg reading test Initially set the equipment to free flow mode ensure the base ofthe unit gt Air Flow Meter airflow valve at the front of the Air Flow Meter is fully open turn the Lom reading valve clockwise to open Using a soft cloth to Use a Phillips Head Gently loosen the top and bottom housing Once loose protect the unit from Screwdriver to remove hold the power socket IEC connector to prevent from damage place the Control Unit the four screws that secure catching while lifting the top cover and leaning it back on your on a level work surface with the housing Place the screws work surface base facing upwards and washers in a safe place Be careful not to drag the internal wires and tubing during this process Before continuing ensure no electrical leads are stretched and that all electrical connectors on the Printed Circuit Board PCB
19. clips by pressing firmly into place 1 5 Use a Phillips Head Screwdriver to replace the four screws plus washers and tighten to secure the housing together 1 Connect the Control Unit to mains power and switch on the Control Unit to confirm operation SERVICE PROCEDURES Standard Pressure Test 220DS 4 pipe Control Unit Testing airflow and checking for a faulty compressor The Control Unit compressor is designed for long life and backed by a two year warranty from the Manufacturer however compressor failure can occur and will require replacement The Standard Pressure Test should be carried out to check the compressor is working at full operational capacity and that sufficient airflow is being generated to maintain maximum Mattress specifications By directly connecting the compressor to the Pressure Test Equipment Sphygmomanometer and Air Flow Meter this test will confirm system pressure readings at maximum and minimum airflow in free flow mode or with different degrees of back pressure applied Ifthe Pressure Test fails and pressure readings do not match required settings the compressor should be replaced and the test repeated The Control Unit must be allowed to warm up before undertaking the Standard Pressure Test to ensure the diaphragm inside the compressor has loosened and is operating at maximum capacity After opening the unit reconnect power and allow the system to run for a minimum of thirty minutes before commen
20. coco o oo 9 ce o o o co o o doc 15 18 20 os ewes eee ooooo o ooo A The following section outlines the steps and procedures to follow if there is a suspected fault in the Control Unit A Any fault or damage to the product that is not discussed in these Service Procedures is deemed anon serviceable issue The faulty product must be returned to the Manufacturer for repair or replacement If a repair seems unmanageable or the issue falls outside the scope of serviceable repairs please return the Control Unit to the Manufacturer Please note that this is a generic service manual which is applicable for several different models Thus the products used in the pictures may differ from the product shown below SERVICE PROCEDURES 220DS 4 pipe Control Unit Malfunction of the Control Unit may be due to the failure of one of the replaceable electrical components of the Control Unit including the compressor print circuit board and timing motor rotary valve Alternatively alack or loss of system pressure can be attributed to avariety of causes including an incorrectly attached CPR Tag aloosely connected or leaking Air Cell leaking Air Pipe or faulty fuse Insufficient system pressure is identified when the Alarm LED flashes and the corresponding Pressure Setting alarm signals display Should the Control Unit fail to operate or system pressure fail to reach
21. ctrical cords Using a soft cloth to protect the unit from damage place the Control Unit on a level work surface with base facing upwards Gently loosen the Connector Plate from the side of the unit and hold firmly in one hand Use a Phillips Head Screwdriver to remove the four screws that secure the housing Place the screws and washers in a safe place such as small container or jar to prevent loss Hold the unit firmly and turn it over face upwards on its base Detach all four connectors from the Connector Plate by holding the base of each connector at top of air pipe and twisting counter clockwise to release the locking mechanism Be careful to maintain the correct order of the pipes or alternation sequence will be incorrect 20 Connector Plate Replacement Unpack the replacement Connector Plate and refit all four connectors in the correct Sequence twisting clockwise to lock into place You may want to carefully secure pipes using a gentle adhesive tape or cable tie to bind SERVICE PROCEDURES Reposition the Connector 1 0 Before closing the Plate into the side of the housing make sure control unit all power leads and pipes are free from the side edges Ensure the regulator tubing will not kink when the top cover is closed Ensure the Connector Plate retains the correct orientation with the groove that aligns with the tongue on the Handle positioned towards the top housin
22. e of the rotovalve 1 Firmly push down on the rotovalve while replacing the split pin through the top of the shaft A significant amount of pressure is required to counteract the force of the spring 1 Reconnect the motor power lead to the circuit board and attach a new cable tie to secure all power leads as before 1 Testthe motor before closing the housing Connect the Control Unit to mains power and switch on to ensure the motor works and rotovalve is turning the side edges Ensure the with no adverse noise It the Control Unit fails to operate the unit needs to be returned to Before closing the housing 2 and pipes are free from regulator tubing will not kink when the top cover is closed the Manufacturer for further repair make sure all power leads Align the top and bottom housing 21 before slowly pushing closed Ensure the seal is properly aligned around the housing including the air pipe connectors fuses and power connector 23 Use a Phillips Head Screwdriver to replace the four screws plus washers and tighten to secure the housing together 2 Connect the Control Unit to mains power and switch on the Control Unit to check function 22 Holding the top and bottom housing firmly together turn the Control Unit upside down with base facing upwards or replacement Switch off power supply to the Control Unit before closing the housing Return the Control Unit to
23. ed Check each Air Cell and or Side Bolster is securely attached to its connecting air pipe 4 Check all cells pipes and pipes for any air leakage 5 Switch on Power 1 Reset the alarm turn off Power and press the Alarm Mute button 2 Check the CPR Tag is intact ensuring all sealing connectors are firmly fitted to Mattress air pipes 3 Check all air pipes along inside of the Mattress and or Side Bolster each should be firmly connected Check each Air Cell and or Side Bolster is securely attached to its connecting air pipe 4 Check all cells pipes and pipes for any air leakage 5 Check air filter covers are correctly secured and air filers are clean Switch on Power Reset the alarm turn off Power and press the Alarm Mute button Disconnect the Handle to reduce pressure reconnect when pressure has decreased Check for twists in the air pipes between Control Unit and Mattress Switch on Power Reset the alarm turn off Power and press the Alarm Mute button Disconnect the Handle to reduce pressure reconnect when pressure has decreased Press the Alarm Mute button to silence the audible alarm Check the power cord is firmly plugged into the Control Unit check the Control Unit is connected to mains power outlet with the correct voltage 3 Check the Control Unit is switched on Switch off and disconnect the unit before restarting 4 Check the Control Unit w
24. ensuring the power lead does not get caught in the process Dispose of the faulty motor in an environmentally safe manner 1 Unpack the replacement motor Carefully thread the power lead under the base of the compressor cage before repositioning the new motor over the shaft and on its mounts ensuring bolt holes are correctly aligned 1 Replace the L shaped metal bracket over the bolt hole closest to the compressor it must be positioned to accommodate the plastic handle on the rotovalve If not correctly positioned the rotovalve will move during operation To test correct alignment 1 of the motor and bracket insert both bolts to secure the motor but finger tighten only Gently place the rotovalve over the shaft to check the L shaped bracket is correctly positioned to slide through the plastic handle at the side of the rotovalve Once alignment is verified remove the rotovalve and using the 7 32 inch socket wrench tighten both bolts to firmly secure the motor in place Be careful not to overtighten 16 SERVICE PROCEDURES Synchronous Motor Replacement 220DS 4 pipe Control Unit 1 Reposition the spring 5 over the shaft wider coils at the base finer coils on top 1 Ifthe top plastic casing of the rotovalve has come lose reposition it and hold firmly in place before replacing the rotovalve over the shaft while sliding the L shaped bracket through the plastic handle at the sid
25. epacement the electrical socket in the base facing upwards remove parts are required passo e 2DxFilters Remove each foam Replace both air filters air filter for cleaning or 5 and refit the filter covers replacement The foam air ensuring the clip snaps into filters and filter casings may place be washed with soap and water Rinse with plain water and dry thoroughly before returning to the Control Unit Alternatively refit with a new filter recommended annually 22 SERVICE PROCEDURES Rubber Feet Replacement 220DS 4 pipe Control Unit Replacing the rubber feet on the base of the unit The Control Unit has four rubber feet at each corner ofthe base ofthe unit to cushion the unit when hanging against the foot ofthe bed or standing on the floor or other stable surface On occasion these rubber feet will fall out or become damaged Missing or damaged rubber feet should be replaced to maintain the stability ofthe Control Unit The following tools are required e Phillips Head Screwdriver e Needle Nose Pliers The following replacement parts are required e Rubber Feet pei Gipuniuad NE O senos O eerie Switch off power supply to the Control Unit disconnect Air Pipes and remove the power cord from the electrical socket in the base of the unit Using a soft cloth to protect the unit from damage place the Control Unit on a level work surface with base facing upwards Use a Phillips
26. eting the Standard Pressure Test procedure detailed previously steps 1 through 6 replace the faulty compressor with a new compressor The following tools are required e Wire Clippers or sharp knife Needle Nosed Pliers Phillips Head Screwdriver The following replacement parts are required e 4xCompressor e 1xCableTie je 6ipwniwaid h A Sio Y Q mme O ree Switch off power supply to the Control Unit and remove the power cord from the electrical socket in the base of the unit before disconnecting the Pressure Test Equipment air pipe 8 Using Wire Clippers or asharp knife carefully cut and remove the cable tie securing the power leads between the two halves of the unit Check the internal compressor power lead and air pipe is disconnected before removing the eight rubber mounts that secure the compressor within the metal cage It is easier to extract each mount using a pair of needle nosed pliers to gently twist free rather than pulling directly with force If rubber mounts break make sure all pieces are removed from inside the unit Undamaged mounts can be reused Using a Phillips Head 1 0 Screwdriver loosen the two screws at the end of the cage furthest from the air pipe inlets Then remove the screws closest to the air pipe inlets placing carefully aside Tilt the cage upwards to slide the compressor over the housing struts Ensure the compressor power lead does not get c
27. etween portable and mobile RF communications equipment and this alternating Control Unit This Control Unit is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled The customer or the user ofthis Control Unit can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment transmitters and the control as recommended below according to the maximum output power of the communications equipment Rated maximum output Separation distance according to frequency of transmitter m power of transmitter W 150 KHz to 80 MHz 80 MHz to 800 MHz 800 MHz to 2 5 GHz d 1 167P d 1 167yP d 2 333yP For transmitters rated at a maximum output power not listed above the recommended separation distance d in meters m can be estimated using the equation applicable to the frequency of the transmitter where P is the maximum output power rating of the transmitter in watts W according to the transmitter manufacturer NOTE 1 At 80 MHz and 800 MHz the separation distance for the higher frequency range applies NOTE 2 These guidelines may not apply in all situations Electromagnetic propagation is affected by absorption and reflection from structures objects and people 36 AEDA HEALTHCARE CONTACT INFORMATION Aeda Healthcare Limited 15th Floor 100 Queen s Road Central Central Hong Kong Tel 852 6832 5199 Fax 852 6832 53
28. f a repair seems unmanageable the issue falls outside the scope of serviceable repairs or the problem persists following the recommended service checks and repair procedures please return the faulty System Control Unit Mattress or both to the Manufacturer Problem Control Unit does not operate no display lights illuminate Control Unit operational but red Alarm LED illuminates Mattress fails to reach or drops below accepted minimum level Mattress fails to inflate The Control Unit is grinding or making an unusual noise The Mattress is inflated but static head cells are still deflated The Control Unit may not be attached to apower source The power cord may be damaged Afuse may need replacing The system may have an air leak The Air Filters may need cleaning or replacing The Synchronous Motor timing motor may be damaged System may need more time to inflate air pressure must build in alternating section before static head cells inflate CPR Tag is not fully connected Valves to static head cells may be damaged or cracked Initial Checks 1 Check the Control Unit is connected to mains power outlet with the correct voltage 2 Check the Control Unit is switched on Switch off and disconnect the unit before restarting 3 Check the Control Unit with a spare power cord in known working condition 1 Check the Handle is securely attached to the Control Un
29. g This ensures the correct orientation of the Handle is maintained 1 2 Holding the top and bottom housing firmly together turn the Control Unit upside down with base facing upwards Using the Phillios 1 Head Screwdriver to replace the four screws plus washers and tighten to secure the housing together 220DS 4 pipe Control Unit E 1 1 Align the top and bottom housing before slowly pushing closed Ensure the seal is properly aligned around the housing including the air pipe connectors fuses and power connector 21 SERVICE PROCEDURES Air Filter Maintenance 220DS 4 pipe Control Unit Cleaning and replacing the air filters Good filter maintenance is critical to maintain the Control Unit in optimal operating condition Failure to maintain clean filters may result in system downtime and increased repair costs It is recommended that the air filter be replaced each year as a minimum Always check and replace air filters as part of any standard maintenance or service procedure je 6ipuiniwaid b A Simo Y Q ommen O The following tools are Switch off power supply Using a soft cloth to 3 Using a suitable tool required tothe Control Unit protect the unit from such as 2mm flat head GinecethesdScrewanver disconnect Air Pipes and damage place the Control Unit screwdriver gently press the l remove the power cord from on a level work surface with clip on each air filter cover to Tne TOLOWING r
30. ials under high stress and heat conditions which can make the unit susceptible to wear and tear over along period of time To minimise noise and vibration the compressor is housed within a strong metal cage secured on all sides by rubber mounts These mounts serve to insulate the rest of the unit from the vibration of the compressor Alarm Speaker A onnector Plate Rubber Fee SERVICE PROCEDURES Basic System Checks 220DS 4 pipe Control Unit Before commencing any service procedure the following basic checks should be completed to ensure that system fault or failure is not due to an oversight on behalf of the user Set up the system and check the following Ensure all power cords Check the Handle is Remove the Mattress Check each Air Cell and leads are firmly securely attached to Top Cover and check the and or Side Bolster is attached and that the system the Control Unit all four CPR Tag is firmly connected firmly connected to the is connected to a working connectors should be firmly internal air pipe s power source with correct inserted Once these simple checks are complete proceed with the service and repair as outlined in the following procedures voltage Service Procedure Flowchart Follow the flowchart to establish the recommended steps for system check and repair Control Unit is inoperable Printed Circuit Fuse Check and Display Panel fails to activate when Replacement Board PCB PCB Rep
31. it 2 Check the CPR Tag is intact ensuring all sealing connectors are fully fitted to the Mattress air pipes 3 Check all pipes along the inside of the Mattress each should be firmly connected 4 Check each Air Cell and or Side Bolster is securely attached to the connecting air pipe 5 Check all cells pipes and pipes for any air leakage 6 Check air filter covers are secure and air filters are clean 1 Check system has had sufficient time for initial inflation 40 to 50 minutes 2 Check the CPR Tag is intact ensuring all sealing connectors are fully fitted to the Mattress air pipes 3 Visually check the internal Mattress air pipes that run from the CPR Tag to the static head cells for splits cracks or other damage Technical Service Procedure Control Unit Fuse Check and Replacement Control Unit Printed Circuit Board Check and Replacement Control Unit Air Filter Maintenance Control Unit Compressor Check and Replacement Control Unit Synchronous Motor Replacement Return System to Manufacturer for further repairs or replacement 27 SERVICE PROCEDURES Troubleshootin Problem Initial Checks Technical Service Procedure The Mattressisnot Static or Max Firm 1 Switch the Control Unit off and disconnect the power before Synchronous Motor alternating modes may be restarting Ensure Alternating Mode is selected Replacement activated Patient is sinking The pressure may 1 I
32. ith a spare power cord in known working condition Technical Service Procedure Control Unit Fuse Check and Replacement Control Unit Printed Circuit Board Check and Replacement Control Unit Air Filter Maintenance Control Unit Compressor Check and Replacement Control Unit Standard Pressure Test Control Unit Standard Pressure Test Control Unit Fuse Check and Replacement Control Unit Printed Circuit Board Check and Replacement 29 General Safety Precautions AN Do not use this equipment in the presence of flammable anesthetics Explosions could result The air intakes for the Control Units are at the sides of the unit To avoid the risk of blocking these intakes it is recommended that the unit be mounted on the footboard of a bed frame Should the bed not have a suitable footboard it is recommended that the unit be placed on a solid surface such as atable or on the floor SAFETY Precautions Protection Against Hazards Fluids Avoid spilling fluids on any part of the Control Unit If spills do occur e Disconnect the unit from the mains wall socket O Clean fluids from the case Ensure that there is no moisture in or near the power inlet power switch and power plug before reconnecting the power supply e Check the operation of controls and other components in the area of the spill e Perform applicable checkout procedures Liquids remaining on the electronic controls can cause corrosio
33. lacement unit is connected to a power source Check Return to Manufacturer PRESSURE p OK g Control Unit is Basic System Checks operational but check power amp power cords Standard PRESSUR Air Leak Test fails to reach operation Air Hose Attachments Pressure Test OK Ker Wee pressure or loses pressure CPR Tag Air Cell attachment DEFLATING PRESSURE NOT O Air Cell Replacement Compressor Replacement Control Unit is operational but the Synchronous motor is grinding Motor or making an unusual sound Replacement OTHER PROBLEM Return to Manufacturer Return to Manufacturer Fuse Check and Replacement Testing fuse for damage and replacing a blown fuse SERVICE PROCEDURES 220DS 4 pipe Control Unit Control Unit failure may be the result of a blown fuse Always check the fuse before opening the unit and performing any other internal component test procedures Note When changing the replaceable fuse use same rating fuse only T1AL 250V The following tools are required O Flat Head Screwdriver The following replacement parts are required e 250V fuse Visually inspect the fuse check if the metal filament inside the fuse cylinder is disconnected or snapped and discard if damaged or re insert if undamaged eybipur vuuaJd ND AI y LO me Ore O Switch off power supply to the Control Unit and remove the power cord from the electrical socket in the
34. luid contamination inspect the Top Cover for punctures or damage If the Top Cover is damaged it should be replaced before returning the system to use If necessary for inspection or cleaning the Air Cells may be removed by carefully disconnecting the air pipes and unsnapping the cell Itis not recommended that Side Bolsters be removed for cleaning Using a well wrung out cloth dipped in warm soapy water wipe the Mattress base Air Cells and Side Bolsters where applicable Rinse with plain water and allow to dry Using a well wrung out cloth dipped in warm soapy water wipe the Control Unit Handle and Air Pipes Do not allow fluid to penetrate the Control Unit If the Top Cover or Air Cells have become excessively soiled they may be laundered in a washing machine at up to 95 C using normal domestic washing powder Do not add bleach to the wash cycle Rinse well using plain water and dry thoroughly before use Do not dry the Top Cover using the heat cycle ora dryer Air dry or select a low of non heat dry cycle 31 Cleaning and Maintenance Between Patients A Inspect all parts for damage and replace as necessary before returning to service A Do not return the Control Unit to service without replacing air filters A Do not allow fluid to penetrate the Control Unit 1 2 3 4 CARE 8 CLEANING Recommendations The Mattress should be dismantled according to the instructions on the previous page Launder
35. ly steps 1 through 7 replace the faulty PCB with a new PCB When handling the PCB anti static gloves or other anti static precautions should be used to protect the PCB from static The following tools are required e Needle Nosed Pliers e Phillips Head Screwdriver The following replacement parts are required e 1xPCB 1 Reconnect all seven leads into the corresponding connectors on the circuit board je36ipwniwaid b A Sio Y O mOn O Switch off power supply to the Control Unit before disconnecting the spare test PCB Disconnect all seven leads while noting the location of each lead on the circuit board 1 2 Before closing the housing make sure all power leads and pipes are free from the side edges Ensure the regulator tubing will not kink when the top cover is closed Using Needle Nosed Pliers unclip the PCB from the top housing Note the orientation of the PCB before removing it from the unit Dispose of the faulty PCB in an environmentally safe manner 1 Align the top and bottom housing before slowly pushing closed Ensure the seal is properly aligned around the housing including the air pipe connectors fuses and power connector 1 4 Holding the top and bottom housing firmly together turn the Control Unit upside down with base facing upwards 1 Unpack the replacement PCB Align the circuit board against the four holes and carefully reconnect the
36. n that may cause the electronic components to fail Component failures may cause the unit to operate erratically possibly producing hazards to patient and staff Disposal Dispose of the Air Filter Air Cells and Mattress Top Cover according to local procedures and regulations At the end of useful life dispose of waste according to the European Union Waste Electrical and Electronic Equipment WEEE Directive and in compliance with relevant local regulations Power Cord The system should never be operated with a worn or damaged power cord Should the power cord be found to be worn or damaged replace immediately and dispose of the damaged cord Interference Although this equipment conforms to the intent of the Directive IEC 60601 1 2 in relation to Electromagnetic Compatibility all electrical equipment may produce interference If interference is suspected move equipment from sensitive devices or contact the Manufacturer IEC 60601 1 2 Medical Electrical Equipment Part 1 General Requirements for Safety Amendment No 2 Collateral Standard Electromagnetic Compatibility Requirements and Tests 30 General Recommendations A A A Follow the Manufacturer s instructions as detailed below and in the applicable User Manual Failure to do so may result in cross contamination or equipment damage To prevent cross contamination the Manufacturer recommends that the system be cleaned and laundered between patien
37. ncrease Pressure Setting an incremental increase is Mattress Service or bottoming out be set too low for usually sufficient but wait 12 minutes one full cycle before Procedures while lying flat on the patient s weight checking Mattress The system maybe 2 Perform bottoming out test losing pressure a With patient lying supine fold back one side of the Mattress Top Cover just past sacral region lower spine Slide hand underneath the patient and feel for a deflated cell under the patient s lower spine Any inner static cell will remain inflated however your hand should easily slide between patient and base If patient is adequately suspended pressure setting can be lowered however this test should be repeated after approximately 20 minutes 28 SERVICE PROCEDURES Tr oubleshootin Control Unit alarm indicators Problem Cause Alarm LED Initial failure audible alarm Alarm LED Pressure too low audible alarm Alarm LED Pressure too high audible alarm Alarm LED Alternating Mode Failure no alternation audible alarm Alarm LED Power down audible alarm Initial Checks 1 Reset the alarm turn off Power and press the Alarm Mute button 2 Check the CPR Tag is intact ensuring all sealing connectors are fully fitted to the Mattress air pipes 3 Check all air pipes along inside of the Mattress and or Side Bolsters each should be firmly connect
38. ng at full capacity and needs to be replaced Proceed to Compressor Replacement procedure Align the top and bottom housing before slowly pushing closed Ensure the seal is properly aligned around the housing including the air pipe connectors fuses and power socket If all pressure and air flow measurements met the expected levels the problem may be due to aleaking Air Cell or other defect with the Mattress Close the Control Unit and proceed to Mattress procedures 1 0 Holding the top and bottom housing firmly together turn the Control Unit upside down with base facing upwards SERVICE PROCEDURES 220DS 4 pipe Control Unit To close the Control Unit first disconnect the Pressure Test Equipment air pipe from the compressor and reattach the internal air pipe using gentle pressure to ensure a firm fit Use a Phillips Head Screwdriver to replace the four screws plus washers and tighten to secure the housing together 11 Before closing the housing make sure all power leads and pipes are free from the side edges Ensure the regulator tubing will not kink when the top cover is closed eybipuniald omo y 9 Om 1 Connect the Control Unit to mains power and switch on the unit to confirm operation 12 Compressor Replacement Replacing a faulty compressor SERVICE PROCEDURES 220DS 4 pipe Control Unit Having established a fault with the compressor by following the compl
39. on the Handle positioned towards the top housing This ensures the correct orientation ofthe Handle is maintained 1 4 Using the Phillips Head Screwdriver to replace the four screws plus washers and tighten to secure the housing together Before closing the housing make sure all power leads and pipes are free from the side edges Ensure the regulator tubing will not kink when the top cover is closed 1 19 Connector Plate Replacement Replacing the Connector Plate SERVICE PROCEDURES 220DS 4 pipe Control Unit If the sunken Connector Plate is cracked or damaged it must be replaced The following tools may be required e Phillips Head Screwdriver The following replacement parts are required e Connector Plate Gently loosen the top and bottom housing Once loose hold the power socket IEC connector to prevent from catching while lifting the top cover and leaning it back on your work surface je 61puiniwaid omo y Omen ever O Switch off power supply to the Control Unit disconnect the Air Pipes and remove the power cord from the electrical socket in the base of the unit Be careful not to drag the 5 internal wires and tubing during this process Before continuing ensure no electrical leads are stretched and that all electrical connectors on the Printed Circuit Board PCB are firmly connected You may need to prop the top housing case to prevent strain on the ele
40. quality should be that of atypical commercial or hospital environment Ifthe user of the control requires continued operation during power mains interruptions it is recommended that the Control Unit be powered from an uninterruptible power supply or abattery Power frequency magnetic fields should be at levels characteristic of atypical location in atypical commercial or hospital environment 34 SERVICE PROCEDURES Declarations Declaration electromagnetic immunity for ME EQUIPMENT and ME SYSTEMS that are not LIFE SUPPORTING Guidance and manufacture s declaration electromagnetic immunity This Control Unit is intended for use in the electromagnetic environment specified below Immunity test IEC 60601 test level Compliance level Electromagnetic environment guidance Conducted RF ie Portable and mobile RF communications equipment should IEC 61000 4 6 450 kHz to 80 MHz be used no closer to any part of the CT515 including cables than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter Radiated RF 3V m IEC 61000 4 3 80 MHZ to 2 5 GHz Recommended separation distance d 1 167 P d 1 167 P 80MHzto 800 MHz d 2 333 P 800MHzto2 5 GHz Where P is the maximum output power rating of the transmitter in watts W according to the transmitter manufacturer and d is the recommended separation distance in meters m Field strengths from fixed RF transmitters
41. the Top Cover and Air Cells as described on the previous page Using warm soapy water or sodium hypochlorite solution at 10 000ppm and a well wrung cloth clean the Mattress Control Unit Handle Air Pipes and Side Bolsters where applicable Rinse with plain water and allow to dry thoroughly Replace air filters see the relevant Air Filter Maintenance procedure for details 32 Definition of Symbols Used SERVICE PROCEDURES Technical Specifications The following symbols may appear in this manual on the Control Unit or on its accessories Some of the symbols represent standards and compliances associated with the Control Unit and its use A Caution Warning of possible hazard to system patient or staff A Warning of possible electrical hazard A Important operational information Authorized Representative EC in the European Community E Class Il equipment gael Manufacturer SN Specifies serial number 9 R Type B applied part E DISPOSAL Do not dispose this product as unsorted municipal waste Collection of such waste separately for special treatmentis necessary Technical Specifications Power input Fuse rating Compressor Air distributor Control system Power consumption Operation mode Cycle control Cycle time Pressure setting Piping output Max Load on mattress Operating Environment Storage Transportation Environment Classification IEC60601 1 AC 220 240VAC 50Hz 0 2A or AC 100
42. the manufacturer in line with standard procedures 17 SERVICE PROCEDURES Connector Replacement 220DS 4 pipe Control Unit Replacing the air pipe connectors Each of the four connectors on the side of the Control Unit can be removed and replaced in the event of damage or breakage In the event of more significant damage to the external plate that houses the four connectors proceed to the Connector Plate Replacement procedure je 61puiniwaid Soy LO mm Omm O The following tools may be Switch off power supply Using a soft cloth to Use a Phillips Head required to the Control Unit protect the unit from Screwdriver to remove e Phillios Head Screwdriver disconnect the Air Pipes and damage place the Control Unit the four screws that secure l remove the power cord from on a level work surface with the housing Place the screws elo wins repacement the electrical socket in the base facing upwards and washers in a safe place parts are required base of the unit such as small container or e Connector jar to prevent loss Hold the unit firmly and turn it over face upwards on its base Gently loosen the top and Be careful not to drag the Gently loosen the Remove the damaged bottom housing Once 5 internal wires and tubing Connector Plate from the connector from the loose hold the power socket during this process Before side of the unit and hold firmly Connector Plate by holding IEC connector to prevent continuing ensure no electri
43. ts according to the instructions below Always disconnect the Control Unit from mains power before cleaning Do not spray disinfectant directly on to the unit or immerse the unit in any type of liquid Failure do so could result in equipment damage and or electric shock Cleaning While System in Use DU RON gt gt The System should be cleaned every two weeks if in constant use Allow all parts to dry thoroughly before returning to use Remove patient from the System Unplug the Control Unit from mains power Remove the Top Cover Using a well wrung out cloth dipped in warm soapy water wipe the surface of the Top Cover Rinse with plain water and allow to dry Pull the CPR Tag and disconnect the Handle from the Control Unit to allow the Mattress to deflate completely Inspect the interior of the Mattress for any signs of fluid contamination A A b gt gt gt OPO N CARE amp CLEANING Recommendations Do not use high temperature autoclave steam cleaning devices or phenolic based cleaning products Use of either ofthese items could result in damage to equipment and or loss of waterproof qualities of the Top Cover The System may be cleaned according to local protocols and regulations procedures for blood borne pathogens provided the Manufacturer s instructions are followed Refer to the Top Cover wash tag for detailed cleaning instructions If the interior of the Mattress shows signs of f
44. vent loss Hold the unit firmly and turn it over face upwards on its base Disconnect the remaining three connections from the PCB two flat digital leads and one air tube Be sure to note the location of all seven connections on the circuit board for easy replacement Leave the disconnected PCB in the Control Unit during testing Printed Circuit Board PCB Check Take the working spare Reconnect mains power PCB and reconnect switch on the Control Unit all seven leads into the and check the Display Panel If the unit now operates the internal PCB has failed and needs replacing Proceed to the Printed Circuit Board Replacement procedure for next steps corresponding connectors four electronic leads two digital one air pipe SERVICE PROCEDURES 220DS 4 pipe Control Unit If the Control Unit still does not operate the unit needs to be returned to the Manufacturer for further repair or replacement Switch off power supply to the Control Unit remove the spare PCB and reconnect the internal PCB reconnect the seven power leads to the circuit board before closing the housing Return the Control Unit to the Manufacturer in accordance with standard procedures Printed Circuit Board PCB Replacement Replacing a faulty circuit board SERVICE PROCEDURES 220DS 4 pipe Control Unit Having established a fault with the PCB by following the Printed Circuit Board Check procedure detailed previous
45. wards on its base Using thumb and forefinger push down firmly on the plastic rotovalve casing to release tension while removing the split pin a deal of downward pressure is required While maintaining downward pressure take a small screwdriver or other implement to gently lift the split pin from the top of the motor shaft Place the pin in a safe place for future replacement 15 synchronous Motor Replacement SERVICE PROCEDURES 220DS 4 pipe Control Unit Therotovalve is made oftwo plastic circular casings held together by lubricant material and should remain attached during removal Ifthe top casing comes free during this process place in a safe place until time to replace the rotovalve when it can be reattached Gently lift the plastic rotovalve up and over the shaft sliding the L shaped metal bracket through the black plastic handle at the side of the rotovalve to reveal the spring and synchronous motor beneath Remove the spring and place it in a safe place for future replacement Using the socket 1 wrench unscrew the two bolts that hold the motor in place noting the position of both the bolts and the L shaped metal bracket closest to the compressor This bracket helps secure the plastic rotovalve casing to the motor and should also be removed and placed in a safe place with bolts for future replacement Liftthe motor off its 1 mounts and remove
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