TECHNICAL MANUAL CQUBE. Your Dealer. Rev

Transcription

1 TECHNICAL MANUAL CQUBE Your Dealer EN Rev

2 1. Contents. Technical manual. CQUBE 1. Contents page Overview Technical service card 3 3. Maintenance and care of grinder Cleaning with GRINDZ 9 5. Warning message shown in display Error code description Brewing cycle settings Electrical sheme Electrical sheme UC and IO Pay card Electrical sheme High current Exploded view Spare parts list Dimension sketch Overview of components, cold water Overview of components,cold water + CO Service intervals 47 2.

3 2. Overview: Technical Service Card CQUBE TECHNICAL SERVICE CARD. TECHNICAL SERVICE CARD Item number: Is used for cleaning and setting jug beverages. The user card is supplied by your dealer. For complete menus See Programming manual. Insert the card with the chip upwards, according to the illustration. The display will show the Service Menu, Jug Beverage and you can now browse forwards through the menu. Service Menu Jug Beverage To use the machine again. Remove the card and keep it in a safe place. 3.

4 3. Maintenance and care of grinder EK21 CQUBE bean container Bean valve Grinder Grinder dispenser 4.

5 3. Maintenance and care of grinder EK21 CQUBE 1. Periodic maintenance. grinder EK21 - Each month: Clean silicon outlet, grinding house and grinding discs. - Monthly cleaning of grinder using GRINDZ cleaning tablets (item no. E ). - In case of blockage: cleaning, if necessary detaching of rotating carrier. 2. Safety Please read and observe the following service instructions carefully. Non-observance can result in damage to the grinder as well as in healththreatening risks for the user. All installations shall been done by an qualifi ed personnel. 2.1 Symbols Safety instruction: In case of non-observance, extreme risk of accidents exists. General instruction In case of non-observance, the device can become damaged or optimum operation not be guaranteed. 2.2 Safety instructions The grinder is only allowed to be used to grind whole coffee beans. Ground coffee is never allowed to be fi lled into the input-shaft. Do not carry out any modifi cations or changes on the grinder. In case for non-observance, the manufacturer shall be liable for resulting damain no case whatsoever. Never put your fi ngers or objects into the rotating grinding mechanism inside the input-shaft.the grinder must not be operated when turning parts are accessible! Make sure, that the power cannot be turned on when working on the built-in grinder! In order to avoid damages, do not use power tools or cordless electric screwdrivers for any work on the grinder. 5.

6 3. Maintenance and care of grinder EK21 CQUBE 3. Every month. Approximately every month the grinder housing and spout should be inspected for coffee residues and obvious damages. In case of too much coffee residues around the spout, check if the silicone flapper inside the spout is in place. Proceed as follows: 3.1 Remove bean container. Remove all coffee residues from the spout and the grinder housing by grinding through all coffee beans and using a vacuum cleaner to remove all residues. 3.2 Remove the three Allen screws (A) in the grinder housing lid. 3.3 Carefully detach the grinding housing. Fig.1. Note its position for correct reassembly. Do not alter the adjustment of the grinding discs. A Fig Clean the inside of the grinder housing and the outside of the disc carrier with a soft brush. Check the correct position of the silicon flapper and the spout. (see chapter 6 and 6.5) 3.5 When reassembling the grinder housing, again check for the correct position and do not alter the grind adjustment of the discs. Fasten the three Allen screws. 4. Removing the rotating carrier. Each third year or after cups the grinding discs should be exchanged to guarantee constant grinding capacity and accurate dosing. Proceed as follows: 4.1 Remove the grinder casing and the rotating carrier. Loosen the left threaded nut by turning it clockwise (A ) Fig Remove the worn-out grinding discs by detaching the slotted screws. (B) Fig.2. B Fig.2. A 6. B

7 3. Maintenance and care of grinder EK21 CQUBE 4. Removing the rotating carrier. (continuation). 4.3 Clean the surfaces of the seats and the new discs. In case of coffee residues left between disc carrier and new disc, the discs will not run parallel and the grinding performance will deteriorate. 4.4 Mount the new rotating grinding disc.note! The grind adjustment has to be modified after changing the discs. See chapter 5 for new basic adjustment. 5. Basic adjustment of the grinding finess. 5.1 Loosen grinder housing. 5.2 Press the adjustment screw while turning it clockwise until the milling blades touch. Check that they are touching by turning the container manually. The blades are touching when you hear a scratching sound. Fig.3. C C C C Fig Press and turn the adjustment screw counterclockwise 20 notches for the basic setting (approx. 0.5 mm). 5.4 Reassemble grinder house. 6. Exchange of the silicone flapper in the spout. If the silicon fl apper is damaged or out of place it has to be replaced respectively refi tted to the housing. Proceed as follows: 6.1 If possible: remove coffee residues (close bean container, grind empty, vacuum cleaner). 6.2 Loosen the set screw at the front of the grinder housing. Fig.4. 7.

8 3. Maintenance and care of grinder EK21 CQUBE 6. Exchange of the silicone flapper in the spout. (continuation). Fig.4. Fig.5. E D F 6.3 Carefully pull out the spout. (D).Fig Take out silicone flapper (E) which is placed in a groove inside the spout bore, put in the new silicone flapper 6.5 Reassembling the spout (D) and silicone flapper (E) by bringing pressure on the spout tube to make sure that the silicone flapper (E) will be fixed correctly. See Fig Correction of the adjustment. In case that the fi neness of the ground coffee should be changed, the adjustment shaft is accessible through a bore from the front of the grinder housing. 7.1 Press and simultaneously turn the adjustment bolt anticlockwise one or two notches for coarser coffee grounds 7.2 Press and simultaneously turn the adjustment bolt clockwise one or two notches for finer coffee grounds. 7.3 After performing the grind adjustment, run 2-3 cups of coffee through in order to achieve the current settings = Screw driver 2 = Adjustment bolt 3 = Adjustment pinion 4 = Locking pin 8.

9 4. Cleaning with GRINDZ cleaning tablets. Every month 3. Cleaning with GRINDZ cleaning tablets, Every month (Product no. E ) Do the following: Open the door. Remove the brewer (in connection with rinsing) and close the lid on the bean canister. Insert card in the card reader, scroll to HARDWARE TEST and press enter, then scroll to canister Start the grinder by pressing Enter. 2. Run until no more coffee grinds come out of the grinder. 3. Remove the bean canister and fi ll with one cap full of GRINDZ tablets. 4. Re-place the bean canister. 5. Start the grinder by press the Enter button. (To stop grinder press Enter button.) 6. Run until no more cleaning powder come out of the grinder. 7. Open the lid of the bean canister and press the Enter button for coffee. 8. Reassemble the brewing mechanism. Tips: Keep a cup under the grinder outlet during the cleaning process. 9.

10 5. Warning message shown on display CQUBE Message on display: Display shows Hardware Error: Not available Heating Water Please Wait... Low Water Level Press Enter Key Filling Water Please wait Hardware error Drink cannot be selected as pot. Low temperature in the water tank, the machine is heating up (blocked) Low water level in water tank. The machine is fi lling water. Select Product Temp: Strength: Jug Beverage Jug Mode Cups: Energy save mode Can Empty Warning Low Temperature Low Temperature Blocked Empty Drip Tray Energy-saving mode Concentrate is empty The temperature is low, it is still possible to dispense drink. The temperature is low, the machine is blocked. The drip tray is full of water Overcurrent Water Level 10.

11 5. Warning message shown on display CQUBE Message on display: Display shows Unknown Error Low Water Level Blocked Can Empty Blocked Heating Water Open Brewer Check Water Supply Empty Wastebox ERROR Level Pins Change Brewer Filter Place Cup Bev. Disabled Please Wait... Clean Filter Cleaning Hot Key Unknown error The water level in the water tank is low, it is not possible to dispense drink. Out of concentrate, Blocked Temperature low Open brewing mechanism The water has not reached the correct level in the water tank. Check the water tap, restart the machine. The waste box is full, open the door and empty out the grounds. When you close the door, press E to reset the counter. Selectable in main programme. Check, Level sensor. The brewing fi lter is clogged. The fi lter needs replacing or cleaning. If the cup sensor has been activated, this is shown if no cup has been placed on the drip tray. The drink has been disabled. Please wait Clean fi lter Clean. panel active Door Open 11.

12 5. Warning message shown on display CQUBE Message on display: Display shows Change Water fi lter The water fi lter needs replacing; press the E button to reset the counter. Open Door Open door Fill clean. agent Load Detergent Load Detergent Load clean. agent Close door Close Door Place Jug Place pot Press Enter Enter To Start Cleaning Brewer Clean brewer mech Time remaining Time Left Rinsing Brewer Rinsing brewing mech Cycles left: Cycles Left Cleaning Paused Cleaning paused Close door Close Door Please Wait... Please wait 12.

13 6. Error code description. CQUBE Error code description: Overcurrent Group 1:1 = Brewing unit (0,95A limit) Group 1:2 = Other components (Fan, Valves, Relays Etc..) (1,5A limit) Group 1:3 = Mixer 1 (3,5A limit) Group 1:5 = Mixer 2 (3,5A limit) Message is shown if one of the software fuses have been trigged. Caused by a component using too much current (A). You can run each component in the Hardware Test menu and the message will show when you turn on the component that is using too much current. ERROR: Water Supply Message will show if the inlet valve has been open for more than 3 minutes and the machine still have not acquired correct water level Action: Check that the water to the machine is turned on, Check the levelsensor, test function of the inlet valve in Hardware Test ERROR: Tempsensor Message will show if the NTC sensor is broken or is out of range of its resistance curve, also if cables have loosened from its connectors. Action: Replace NTC sensor, check cable connection on the NTC and PCB board. ERROR: Levelpins Message will show if the cables to the water level high & low have been connected to the wrong levelpin. Action: Swap cables to the levelsensor ERROR: Check Heater Message will show if the machine have not reached working temperature within 14 minutes from startup. Action: Check Overheating protection, cables to the element, solid state relay, signal from IO-board to solid state when you know the machine should heat, you can also force the element to run in Hardware Test. ERROR: BREWER C.Door press E Message will show when you interrupt a brewing cycle, eg. open the door when the machine is producing coffee. The machine needs to reach home-position before producing new drink. Action: Press E, check door sensor, brewmec sensor Clean brewfilter Message will show if the brewer motor uses more than 0,95A Action: Check brewfi lter if clogged, brew chamber is mounted in wrong position, brewer motor is broken. 13.

14 6. Error code description. CQUBE Error code description: Peripheral Hardware Error This message will appear if you have loaded a faulty recipe into the machine, the IO-Board is broken and does not get connection with the UcMerisc board. Usually this message appears if you eg. have loaded a standard recipe into a machine using pay system. Make sure you are using the right recipe and reload. Memory Error: Reload Recipes There is no recipe loaded on the UcMersic board. Transfer of the recipes have been interrupted and not completed in UcLoader. memory on the UcMersic board is broken. Fatal Error Contact Service Multiple Overcurrent messages at the same time, or shortcut on the IO-Board, try to run components in Hardware Test and locate faulty components, replace the IO-Board if no one is found. Smartcard Error: Unknown Card The smartcard is not programmed, chip on the smartcard is damaged, card reader is broken or broken cable between card reader and UcMerisc board. Action: Insert and remove the card repeatedly, if the message is shown every time, try another card. If the error remains replace the card reader. Smartcard Error: Wrong Pincode Chip on the smart card have been damaged, replace card Pay Error Type XXX IO-Pay board is reporting error from the payment device, check coinchanger or cashfl ow device. 14.

15 7. Brewing cycle settings CQUBE Brewing cycle settings: Aeration - Sum of sections from position 1 to 3 = 100% - Adjustment in % (0-100%), applies to sections from position 2 to 3 - Affects stirring in coffee bed > Taste: Acidity Pre brew - Pause at section between positions 1 and 3 - Adjustment (0-10 sec) at step in 0.1 sec - Affects the amount of acid from stirring> Taste: Acidity Extraction - Pause between positions 2 and 4 - Adjustment (0-20 sec) at step in 0.1 sec - Affects total contact time > Taste: Body Press time - Sum of sections from position 3 to 5 = 100% - Adjustment in % (0-100%), applies to sections from position 3 to 4 - Affects the consistency of the grounds > Cleanliness - Affects the strain on plunger and cylinder > Operating reliability: Vacuum pressure in cylinder Decompress time - Pause between positions 3 and 5 - Adjustment (0-10 sec) at step in 0.1 sec - Affects the consistency of the grounds > Cleanliness - Affects the strain on plunger and cylinder > Operating reliability: Vacuum pressure in cylinder Empty time - Pause between positions 5 and Home position - Adjustment (0-10 sec) at step in 0.1 sec - Affects the amount of fi nished coffee that comes out of the cylinder > Cleanliness / Operating reliability After Empty time the brewing continues until the micro switch is activated - Home position Home Position Pre brew Extraction 4 5 Decompress 15. Emptytime

16 7. Brewing cycle settings CQUBE REMEMBER For fresh brew machines, the coffee should have the coarsenessautomatic grinding. Grinder settings for automatic grinding are: grinding blades together and set 8 steps back. The optimal total contact time between water and coffee for automatic grinding is 30 sec. The basic settings for coffee were defi ned in cooperation with ECBC in Oslo, to ensure quality in the cup. Water amount 170 ml (before contact with coffee) Coffee amount 11 g (requires above grinder settings) Aeration 70% Pre brew 3.8 sec Extraction time 11.5 sec Press time 50% Decompress time 2.0 sec Empty time 6.0 sec TIPS To compensate for lower Aeration (higher %) Pre brew can be increased to a certain degree. Increased Pre brew time means that more water and coffee are added before the plunger reaches the top position. This produces a better blend. Adjust Pre brew in steps of sec at a time; this quickly provides results in terms of taste. Varies for different coffee types, however. Increased Extraction time produces more body, but only to a certain degree. Too much time makes the coffee over-extracted, which produces a very bitter taste. To little Extraction time means the coffee is under-extracted, leaving little aftertaste. If you wish to cut down on the total brewing cycle time, you want the taste to undergo minimal change. If you shorten the Extraction time, you can compensate somewhat by either putting the grinder on a fi ner coarseness setting or increasing the coffee dose. You then have to test the coffee carefully, to make sure it is not too strong. When you have tasted several cups of coffee, it is very easy to misjudge the taste. For increased dose, the taste is very accurate when you swallow, but the aftertaste disappears and instead it is harsh on the throat. If you increase the volume too much, the grounds can become soaked. To fi x this, you must increase the Press time. This causes the plunger to lower more before the pause (position 3-4); the result is a higher vacuum effect in the cylinder and more fi nished coffee is sucked out through grounds. At the same time, you should increase the Decompress time, to allow the coffee to penetrate the fi lter before empty position is reached and the vacuum pressure in the cylinder is released. Remember to increase the Empty time so all the coffee can drain out of the cylinder. 16.

17 7. Brewing cycle settings CQUBE SYMPTOM - CAUSE - SOLUTION SYMPTOM CAUSE SOLUTION The water and coffee splash out of the brewing chamber during the aeration process. The coffee either lacks or has too much character. The grounds are very soggy or almost watery when the brewer opens. The brewing mechanism sounds very strained. - Hard water. A high surface tension makes it diffi cult for the coffee to absorb water. - Very fresh coffee often takes a little longer to absorb water - The acidity setting is too low/high. - The coffee is too old. - The fi lter is clogged. - The water is hard. A high surface tension makes it diffi cult for the coffee to absorb water and for the water to pass through the fi lter. - Very fresh coffee often takes a little longer to absorb water - The coarseness setting is too fi ne. - Coffee dose is too high. - The volume setting is too high. - The brewing chamber may be cracked. - The cylinder may be cracked. - The fi lter is clogged - The coarseness setting is too fi ne. - The coffee dose is too high. - The brewing mechanism setting needs adjustment. - Run the cleaning programme and replace the fi lter if necessary. - Lower the Aeration %. Test a cup. Increase the Pre brew to compensate if necessary. - Run the cleaning programme and replace the fi lter if necessary. - Increase the Pre brew setting if the coffee lacks character/acidity sec makes a very big difference. - Lower the Pre brew setting for the opposite effect. - Empty the canister and grinder, clean and refi ll coffee. - Run the cleaning programme and replace the fi lter if necessary. - Increase the extraction time if necessary. - Increase the Press time and/or Decompress time if necessary. - Check grinder setting /clean. - Check the Strength setting. - Check the Volume setting. - Inspect the brewing chamber for cracks. - Inspect the cylinder for cracks. - Run the cleaning programme and replace the fi lter if necessary. - Check grinder setting /clean. - Check the Strength setting. - Remove the brewing mechanism, rotate, adjust according to the manual instructions. The grounds scraper cannot remove all the grounds. The grounds scraper is still on one side of the brewing chamber during the brewing cycle. - The brewing mechanism setting needs adjustment. - The grounds scraper is damaged. - The brewing chamber is incorrectly installed. - Remove the brewing mechanism, rotate, adjust according to the manual instructions. - Replace the grounds scraper. - Remove the brewing mechanism, rotate until it opens, pull out and insert the brewing chamber. Check that it follows the cycle. 17.

18 8. Electrical diagram. CQUBE 18.

19 8. Electrical diagram. UC Pay 19.

20 8. Electrical diagram. High Power Connection 20.

21 9. Exploded view. Door / Front CQUBE

22 10. Spare parts list. CQUBE Description; Art. no. Pos. no. Amount/unit Valid for page 21 Door / Front Bean container window (high) Bean container window (low) Top Lid Frame for card reader Card Reader Slide latch Chrome ring Outlet drip tray Drip tray Drip tray insert Drip tray extension Spiral Cup stand Light emitting diode white Light emitting diode red Cup sensor Outlet angled Display Lock with nut Fastener for circuit board User Card (green Technical Service

23 9. Exploded view. Machine CQUBE Säkring 5 AT

24 10. Spare parts list. CQUBE Description; Art. no. Pos. no. Amount/unit Valid for page 23 Machine Brew mechanism Electronic card IO - TE Fuse 5A T Power supply 150W Front, bean container high Front, bean container low Centrifugal Fan, 24V 0,24A Lid bean container Frame for lid, bean container Grinder Relay 1pol Socket Capacitor 12 μf Main socket Power cord Europe Valve double 2,5L/min Centrifugal Fan, 24V 0,18A Connector Waste box Switch 2 pol Inlet hose Micro switch Waste funnel Waste box base cabinet Solid state Lock complete (door) Key, (door) Options: Water fi lter + patron complete Filter head Filter cartridge

25 9. Exploded view. Tank CQUBE

26 10. Spare parts list. CQUBE Description; Art. no. Pos. no. Amount/unit Valid for page 25 Tank Tank complete Water tank 5L + lid Insulation for refrigeration unit Insulation bottom Outlet valve 24V Seal for outlet valve Element 2200W Gasket water tank Double seal level sensor Sensor pin, short Sensor pin, long Steam hose NTC compl. belong Seal for NTC thermistor Drainage tube Inlet hose Motoraxle for motor gear Motor gear, without axle High limit control Silicone hose (sales by metre)

27 9. Exploded view. Mixing system CQUBE silicone hose sales by metre

28 10. Spare parts list. CQUBE Description; Art. no. Pos. no. Amount/unit Valid for page 27 Mixing system Hose adaptor, mixing system Outlet brew mechanism Outlet brew mechanism, extension Outlet angled Hose brew mechanism - fan Hose mixing bowl - fan Valve double outlet, CO Valve double outlet, cold water Brewing motor complete Brewer dock white Pin 3,5x Pin 2,0x Micro switch V5J (FB brew engine) Silicone hose (sales by metre)

29 9. Exploded view. Mixing bowl CQUBE silicone hose sales by metre

30 10. Spare parts list. CQUBE Description; Art. no. Pos. no. Amount/unit Valid for page 29 Mixing bowl Angle for mixing bowl Mixing bowl Steam trap Bulkhead adaptor O-ring Motor whipper plate Whipper motor 24V Complete (incl. slinger disc, motor whipper plate) Slinger disc Mounting plate Grommet for whipper pin Whipper Silicone hose (sales by metre)

31 9. Exploded view. Water + CO2 CQUBE water + CO

32 10. Spare parts list. Chiller unit water + CO2 CQUBE Description; Art. no. Pos. no. Amount/unit Valid for page 31 P 146 Chiller unit Compressor ELECTROLUX GD 40 MB Clixon for GD40MB Start capacitor for GD40MB Startrelay for GD40MB Condenser JG PM060806E Non return valve JG PM090612E JG PM0208E JG SM030808S Filter dryer Fan motor ALEXMAR 5W Fan blade Fan holder Thermostat RANCO K50 L Motorpump Solenoid valve JG PM4508F4S Electronic box

33 9. Exploded view. Chiller unit in machine CQUBE Chiller unit, water

34 10. Spare parts list. Chiller unit water CQUBE Description; Art. no. Pos. no. Amount/unit Valid for page 33 Chiller unit, cold water Start capacitor for GD 40 MB Thermostat K-50 L Filter dryer 10g 6,2-2, Condenser STFT MINI Clixon Fan SUNON MBT Cooling block JG corner 8x8 (1037) Relay Compressor GD 40 MB

35 9. Exploded view. Grinder EK21 CQUBE

36 10. Spare parts list. Grinder EK21 CQUBE Description; Art. no. Pos. no. Amount/unit Valid for page 35 Grinder Inlet housing Slotted pan head screw - M4x Adjustment shaft Adjustment pinion Pressure spring Allen set screw - M5x Slotted cylinder head screw M4x O-ring Worm shaft Allen screw M4x4 - stainless steel Grinding disc carrier Fixed grinding disc Grinding disc carrier - rotating Rotating grinding disc Pan head screw DIN 85 M5x Washer DIN ,5 stainless steel Hexagon nut left-hand thread Grinding housing Allen screw DIN M4x Outlet tube, metal Allen set screw DIN M4x Outlet hose, grinder FB + hose clamb Silicone disc Motor

37 9. Exploded view. Brewing mechanism CQUBE

38 9. Exploded view. Brewing mechanism CQUBE

39 10. Spare parts list. Brewing mechanism CQUBE Description; Art. no. Pos. no. Amount/unit Valid for page 37 brew mechanism Defl ector, Cylinder Pin, Crank Arm O-ring piston Rubber ring piston Tefl on seal Plate, Top Screw, 8 x 1/2, Truss Cylinder Plug, vent, Cylinder Screw, 4-40 x ¼, Screw, 8-32 x ½, Assembly Filter Seal, Brew Chamber Bar, Latch Carriage, Wiper Rod, Carriage, Wiper Retaining Ring, Wiper, Complete Brew Chamber Spring Clip, Latch Bar Valid for page 38 brew mechanism Housing, Vertical Rod Cam, Triple Unwipe Arm Assembly Spacer, Wipe Arm Spring, Wipe Arm Retaining Ring,TRU ARC Vevarm Plate, Ret., Cycle Plate, Ret., Support Latch, Block, LHS Latch, Block, RHS Retaining Ring Tube, Outlet, Water Wrap, Brew Chamber Shim 0, Shim 0, Spacer, Sil., 3/16 x.350 x Spring, H-Frame H-Frame Screw, 8-32 x 3/4, PAN Pin, Grooved, 3/16 x Wipe Arm, Assembly Vertical Rod, Welded

40 9. Exploded view. Canisters high/low CQUBE

41 10. Spare parts list. high/low CQUBE Description; Art. no. Pos. no. Amount/unit Valid for page 40 Canister high 160 x Canister high 67 x Lid for 160 canister Lid for 67 canister Concentrate pipe left Concentrate pipe right Canister low 160 x Canister low 67 x Lid for 160 canister Lid for 67 canister Concentrate pipe left Concentrate pipe right

42 9. Exploded view. Bean container/ canisters high/low CQUBE

43 10. Spare parts list Bean container/ canisters high/low CQUBE Description; Art. no. Pos. no. Amount/unit Valid for page 42 Bean container high Canister high 67 x Lid for 67 canister Concentrate pipe left Concentrate pipe right Bean container low Canister low 67 x Lid for 67 canister Concentrate pipe left Concentrate pipe right

44 11. Dimension sketch. CQUBE Model CQUBE M CQUBE L A 879 mm 995 mm B 420 mm 420 mm C 565 mm 565 mm 44.

45 12. Overview of components Cold Water CQUBE Water IN Water OUT Thermostat Fan Compressor Cooling block Condenser Dryer 45.

46 12. Overview of components Water + CO2 CQUBE Water IN Cooling block Carbonated water OUT Pump pressure increase Electronic box Fan Condenser Carbon acid IN Compressor Water OUT Dryer Solenoid valve Thermostat Gas holder Carbon dioxide tube 46.

47 13. Service intervals. CQUBE 47.

48 FOR SERVICE Please contact Your dealer CREM International AB Box 10, Viksgränd 2, SE Åmotfors, Sweden Tel: +46 (0) , Fax: +46 (0) Art. nr/art. no