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Cozzia EC-326G-CO Maintenance Service Manual
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Cozzia EC-326G-CO Maintenance Service Manual

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Maintenance Service Manual
MODEL: EC-326G-CO
By Customer Service Department

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Donna Gideon
July 10, 2025

I have this chair. No longer using it. What is resale value? Excellent condition. Home has no kids or pets. Minimally used.

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Summary of Contents for Cozzia EC-326G-CO

  • Page 1 Maintenance Service Manual MODEL: EC-326G-CO By Customer Service Department...
  • Page 2 CATALOG 1: Precautions for inspection and repair 2: Massage chair auto-check list 3: Common Troubles and Maintenance Methods list. 4: Tools List 5-1:Guidance of disassemble the backrest pad assy 5-2: Guidance of disassemble the backrest 5-3: Guidance of detach front cover & rear cover of backrest. 5-4: Guidance of detach up &...
  • Page 3 1. Precautions for inspection and repair Inspection  Verify that the power cord is tightly connected on the machine.  Be careful to avoid electric shock. Repair  Power off the supply before repair work begins.  Keep things tidy and in order during repair work. ...
  • Page 4 2:massage chair auto-check list ON/OFF: KNEAD + TAP + POWER(buttons on the controler), press and hold the three buttons in two senconds to turn on the automatic analysis system model. After activating the "auto-checking model", the display screen of the controller keeps flashing; if there is something wrong with the chair, the time area will show you the exact code of the malfunction, meanwhile the buffer will make noise.
  • Page 5 disconnected 3.change kneading 3.kneading motor is motor broken or kneading belt is lost 1.wideth inspection board is broken 1.change wideth more than 5 2.the wire connect to the inspection board activate seconds did not wideth inspection board is 2.change backrest auto-check tested the middle disconnected...
  • Page 6 1.change the counting 1.the counting sensor of sensor of the rolling activate height counting the rolling motor is broken motor. auto-check signal error 2.backrest wire(black) is 2.check whether the model disconnected backrest wire(black) is well connected. 1.change down limit sensor can't test signal activate 1.down limit sensor is...
  • Page 7 3: Common Troubles and Maintenance Methods are listed as following: Serial Phenomenon Description Maintenance Methods The LCD isn’t illuminating: ① Replace Fuse. ①Fuse melts (in the Power Source Box or on ② Replace Power Box. No Function the transformer wire). ③...
  • Page 8 ①Height Inspection Terminal or wire poorly ①Plug the terminal securely or contacts. replace the wires. No Partial ②Height Counting Subassembly fails. ②Replace Height Counting Sub Function. -assembly. ①Terminal or Wire Poorly Contacts. ①Plug the terminal securely or ②Down-stroke Photo-electricity replace the wires. ②Replace Down-Stroke Sub- Subassembly Fails.
  • Page 9 ①The terminals and wires are poorly ①Plug the terminal securely or No response when pressing connected. replace the wires. ②The PCB in the remote controller fails. ②Replace the remote controller. the keys on the remote controller. ①The terminals of reclining actuator and ①Plug the terminal securely.
  • Page 10 ①The terminal of the snuffle valves and ①Plug the terminal securely. ②Replace the snuffle valves. wires are poorly connected. No gas charging ②The snuffle valves fail. ③Replace the inflator pump. in the foot rest. ③The inflator pump fails. ④Replace main PCB. ④Main PCB fails.
  • Page 11 Tools List Tools required Screwdriver Soldering Spanner tools Kit Diagonal cutter and size 1,2,3 long nose pliers Test pen Allen Key set Ratchet Tools Set Blower Electric Driver electrical Cable Ties WIRE adhesive tape CONECTORS...
  • Page 12 5-1:Guidance of disassemble the backrest pad assy. A: Unzip the zipper between backrest pad and backrest. (As the pictures below show.) Locate the zipper. Unzip the zipper B: Find the other zipper between backrest pad and seat pad. Then unzip it. (As the pictures below show.) Locate the zipper Unzip the zipper...
  • Page 13 we can find a sponge assy inside. (As the pictures below show) Locate the zipper Unzip the zipper. The sponge assy has been taken off. Pull the sponge assy out.
  • Page 14 5-2: Guidance of disassemble the backrest. A: Unzip the zipper between backrest and backrest pad. Then detach the Backrest pad Assy from the backrest Assy and rest it on the Seat cushion Assy . ( As picture below show.) Locate the zipper. Unzip the zipper B: There is a hook at the bottom of the backrest.
  • Page 15 Pull the hook up then push The backrest has been lay above the the backrest forward. seat pad assy. D: Disconnect backrest wire connecters. ( One is gray, one is black) Locate backrest wire connecters. Backrest wire has been disconnected. E: At the front of the backrest actuator there is a bolt.
  • Page 16 Locate the bolt. The bolt has been detached. E: Hold the backrest vertically and pull it up, then we can take off the backrest. ( As pictures below show.)
  • Page 17 5-3: Guidance of detach front cover & rear cover of backrest. A: Lay the backrest above seat pad. ( Refer to Guidance of disassemble the backrest.) The backrest has been lay above the seat pad assy. B: Slacken and remove the screws which fixing the rear cover of backrest. Then take off the rear cover.
  • Page 18 C: Slacken and remove the four screws which fixing front cover to the backrest frame. Then we can take off the front cover of backrest. ( As pictures below show.) Locate screws. Slacken and remove the screw. Front cover of backrest has been detached.
  • Page 19 D: There are two zippers attach the fabric the front cover of backrest. Unzip these two zippers then we can detach the fabric. The fabric has been detached.
  • Page 20 5-4: Guidance of detach up & down limit sensor. A: Detach the rear cover of backrest. Then we can find up & down limit sensor. ( Refer to Guidance of detach rear cover of backrest.) Locate up limit sensor. Locate down limit sensor. B: Cut cable ties which fixing the limit sensor wire to the frame.
  • Page 21 D: Use long nose pliers get ride of the glue, then disconnect the connecter. The limit sensor has been taken off. Get ride of the glue.
  • Page 22 5-5: Guidance of detach the kneading motor. A: Detach the front cover of backrest. Then we can find kneading motor.( Refer to Guidance of detach front cover & rear cover.) Locate of kneading motor. B: Take off the kneading belt first. Kneading belt has been taken off.
  • Page 23 D: Use diagonal cutter peel the heat-shrinkable T bush slowly. ( As picture below show.) Be careful, don’t cut the wire Heat-shrinkable T bush has been peel off. E: Use long nose pliers take off the close end wire connector of kneading motor. ( As pictures below show.) Squeeze the close-end wire Close-end wire connecter connecter.
  • Page 24 5-6: Guidance of change the counting sensor of rolling motor. A: Detach the rear cover of backrest. Then we can find counting sensor of rolling motor.( Refer to Guidance of detach front cover & rear cover.) Locate counting sensor of rolling motor.
  • Page 25 D: Use diagonal cutter get ride of the cable ties which fasten the counting sensor wire. Locate cable ties. Close-end wire connecters of counting sensor. E: Use long nose pliers take off the close end wire connector of counting sensor of rolling motor.
  • Page 26 F: Use long nose pliers get ride of the glue, and pry-out the counting sensor. Get ride of the glue. The glue been cleaned. The counting sensor has been The counting sensor has been pry-out. taken off.
  • Page 27 5-7: Guidance of disassemble the massage mechanism. A: Detach the front cover and rear cover of backrest. ( Refer to Guidance of detach rear cover & front cover of backrest.) B: There are four screws fixing the top bar. ( As pictures below show.) C: Use a long nose pliers hold the screw nut firmly, then slacken and remove the screw.
  • Page 28 D: There are two stoppers inside the guide rail. Use long nose pliers and screw driver take them off. ( As pictures below show.) E: Use diagonal cutter get ride of the cable ties which fasten the mechanism wires. Cable tie has been Locate cable ties.
  • Page 29 G: Use long nose pliers remove all the close-end wire connecters Locate close-end wire connecters. H: Use flat screw driver turn the rolling motor and drive the mechanism out of the guide rail. The massage mechanism has been taken off.
  • Page 30 5-8: Guidance of change rolling motor unit. A: Detach the massage mechanism. ( Refer to Guidance of disassemble the massage mechanism.) Massage mechanism has been detached. B: Use a strong screw driver slacken and remove the screws which fixing the rolling motor unit to the mechanism frame.
  • Page 31 C: Now the rolling motor unit can be taken off.
  • Page 32 5-9:Guidance of service the seat pad assy. A:Unzip the zipper between seet pad and backrest pad Locate the zipper Unzip the zipper B: Unzip the zipper between seat pad and footrest cover. Unzip the zipper. Locate the zipper. D: Disconnect the air hose and the wire connecter of the seat pad. Then you can take off the seat pad.

  • Page 33: Vibration Motor

    Air hose and wire connecter has Seat pad has been taken off. been disconnected. E: Cut the cable tie that fasten the zipper head. Then unzip the zipper of the seat pad, then we can take out the sponge. ( As the pictures below show.) Cut the cable tie.
  • Page 34 F: Now we can change the air bag or the vibration motor. ( As the picture below show) Disconnect the air hose. Unfasten the belt,...
  • Page 35 5-10:Guidance of disassemble the side board. A：Detach seat pad assy.（Refer to Guidance of service the seat pad.） Seat pad assy has been detached. B：We can find two screws on each side board. Slacken and remove these two screw. Slacken and remove the screw. Locate the two screw C: After the screw have been removed.
  • Page 36 5-11: Guidance of disassemble main PCB. A：Slacken and remove the screws which fixing the PCB box cover. Then take off the main PCB box cover. Locate the screws that fixing the PCB box cover. Slacken and remove the screws that fixing the PCB box. Pull the PCB box cover out.
  • Page 37 B：With help of long nose pliers get ride of the glue around every connecter. ( As the picture below show.) Get ride of the glue. C: Then disconnect all the connecters of the main PCB. All the connecters has been disconnected. D: Use long nose pliers grip the head of PCB surpporter.
  • Page 38 Lift the PCB at here by finger. Grip the head of PCB supporter. E: After separate the PCB from the four PCB surpporters, then we can take off the main PCB. (As pictures below show.) PCB has been taken off. PCB has been separated from PCB supporters.
  • Page 39 5-12: Guidance of disassemble the Transformer. A: Take off the PCB box cover.( Refer to GUIDANCE OF CHANGE MAIN PCB.) Locate transformer. B：With help of a monkey wrench slacken and remove the bolt that fix the transformer . Slacken the bolt. The bolt has been taken off.
  • Page 40 D：Disconnect all the transformer connecters that connect to the main PCB. Then we can take off the transformer. ( As the pictures below show.) Transformer connecters have been Locate of transformer connecters. disconnected. Transformer has been taken off.
  • Page 41 5-13: Guidance of disassemble the Air valve. A: Take off the PCB box cover. And we can see air valve. ( Refer to GUIDANCE OF CHANGE MAIN PCB.) Locate air valve. B：With help of long nose pliers move the clips away from the air valve. ( As the picture below show.) Grip the claw of the clip and pull it All the clips have been move away...
  • Page 42 D：With help of a diagonal cutter get ride of all the cable ties that fasten the air valve wire. Locate cable ties that fasten air valve wire. E: Disconnect the air valve wire connecter. The connecter has been Locate air valve wire connecter. disconnected.
  • Page 43 5-14: Guidance of disassemble Inflator Pump. A: Take off the PCB box cover. And we can see Inflator Pump. ( Refer to GUIDANCE OF CHANGE MAIN PCB.) Locate Inflator Pump. B: Slacken and remove the screws which fix the inflator pump belt. Inflator pump belt has been taken off.
  • Page 44 All the glue have been cleaned. D: With help of long nose pliers we can pull the inflator pump supporter out of the baseboard. ( As picture below show.) Grip the supporter and pull it out. Grip the supporter and pull it out. E: With help of a diagonal get ride of all the cable ties that fixing the inflator pump wire.
  • Page 45 F: Disconnect inflator pump connecter. Then we can take off the inflator pump. Inflator pump has been taken off. Locate inflator pump connecter.
  • Page 46 5-15: Guidance of disassemble the remote control. A：Detach the backrest assy.（refer to Guidance of disassemble the backrest.） Locate cable ties. The backrest has been detached. B：Cut the cable tie fixing the remote control wire. C: Get ride of the insulation tape. Then disconnect the connecter. Now the remote control has been detached.
  • Page 47 Remote control has been detached.
  • Page 48 5-16: Guidance of disassemble footrest actuator and backrest actuator. A． Detach the backrest assy. (Refer to Guidance of disassemble the backrest.） B． Detach the backrest pad assy and seat pad assy. (Refer to Guidance of disassemble backrest pad. Refer to Guidance of service the seat pad.) Backrest has been detached, seat pad has been detached, backrest pad has been detached.
  • Page 49 E: Cut cable tie which fasten the actuator wire and wire connecters. Then disconnect the connecter. ( As picture below show.) Cut the cable tie that fasten the Cut the cable ties fasten the actuator wires. actuator wire connecters. F: At front and rear of footrest actuator there are bolt which fix the footrest actuator to the frame.
  • Page 50 H：Remove the bolt which fix the rear of the backrest actuator. Locate the bolt. I：After the bolt has been removed then we can detach the backrest actuator. The backrest actuator has been detached.
  • Page 51 5-17: Guidance of change the lower side board. A: Detach the backrest pad assy. ( Refer to Guidance of disassemble the backrest pad. ) B: Detach the seat pad assy. ( Refer to Guidance of service the seat pad. ) C: Detach the backrest assy.
  • Page 52 Locate the screws. The lower side board has been detached.
  • Page 53 5-18: Guidance of service the footrest. A：Detach the seat pad assy . ( Refer to Guidance of service the seat pad.) Seat pad has been detached. B：Slacken and remove the screws which fixing the seat board . Then remove the seat board. Seat board has been removed.
  • Page 54 D: Find the bolt which joint the footrest and connecting rod together. Locate the bolt. E: Use pliers remove the bin first, then remove the bolt. Remove the pin by pliers. The bolt has been removed. D: Find two screws which fixing the footrest onto the chair. Locate the two screws.
  • Page 55 E: Slacken and remove the screw nut, then remove the screw. ( As picture below show.) F: After the two screws have been removed, then we can detach the footrest. G: Slacken and remove the screws which fixing the footrest supports. ( As pictures below show.) Locate footrest supporters and screws.
  • Page 56 H: Find the zipper heads of the footrest cover. And unzip the zipper. (As pictures below show.) Locate zipper heads. The zipper has been unzipped. I: Now we can remove the footrest cover. Footrest cover has been removed.
  • Page 57 J: Find connecters of air bag and disconnect it, Then we can take off the air bag and change a new one. ( As pictures below show.) Locate air bag connecter. Locate air hose connecter.
  • Page 58 6: Main PCB connecter diagram. White-white: transformer ～10.5v Inflator pump. Black-black:transformer ～20.5v Transformer power in: ～110V Power in: ～110V Air valve. Seat pad vibration. Main PCB connecter diagram Up & down limit sensor. Wideth inspection board Rolling motor, tapping motor, Counting sensor of rolling motor.