Hobart Corp. FT900BD User's Manual
Contents
1. LINE STRAINER Fig 42 SYMPTOM POSSIBLE CAUSE NOTE If symptom s persists after possible causes have been checked contact Hobart Service Display Reads Possible Resolution Door s Open Close all inspection doors Unload Dishes Remove all ware from unload section of the machine starting with the ware closest to the machine chambers Finally remove the last ware that is in contact with the dish limit bar Temp Err Tank Name Ensure lower float assembly in indicated tank is not visibly damaged and sufficient water is in the tank to cover the lower float Fni Rinse Temp Low 1 If problem is intermittent and only occurs after the machine has been idle for several minutes this is normal The problem will correct itself after running several pieces of ware through the machine Check that the final rinse booster tank circuit breaker is on and not tripped if equipped Check that the final rinse booster tank overtemp circuit is not tripped if equipped Ensure that the building supply water to the final rinse booster tank is at least the minimum specified by Hobart If temperature control needs adjustment or if there is a booster heater failure contact your local Hobart Service office Temp Err FniRns Ensure that the supply water valve to the final rinse booster is open Check Water Level Ensure all drains are closed and free of debris 2 Check that water supply valve is open Open inspection doo2. LONG CURTAINS LOAD ONE SHORT DUAL RINSE DRAINBACK PAN DRAINBACK PAN STRAINER FT900SD L TO R OPERATION SUA RINSE PNAC RINSEARM 4 CENTER SECTION PREWASH WASH ARM ONLY WHEN BLOWER DRYER IS PRESENT t THREE SHORT CURTAINS lt AT UNLOAD SIDE OF UPPER ARMS TWO PAIRS OF LONG CURTAINS 1 ONE LONG CURTAIN AT UNLOAD END 22 LOAD NI UNLOAD ONE SHORT DRAINBACK PAN DUAL RINSE DRAINBACK PAN STRAINER Fig 34 14 MACHINE OPERATION AND PROGRAMMING SECURITY LEVELS The advanced digital controls on your dishwasher allow several setup and customization options Because these options can affect the operation of the machine they are all locked out by default from the factory To unlock them for editing the security level must be elevated to an appropriate level It is recommended to keep the dishwasher in the lowest security level possible at all times This will prevent options from being inadvertently or intentionally modified from what is expected or acceptable The security level will automatically revert back to the lowest allowable level either Operator or SuperOperator as described below when any of the following occur 1 No keys on the keypad are pressed for 10 minutes or more 2 The machine
3. OF UPPER ARMS ONE LONG CURTAIN AT UNLOAD END UNLOAD ONE LONG DRAINBACK PAN FT900S LTO R OPERATION 4 CENTER SECTION PREWASH ARM WASH ARM WASH ARM 00 THREE PAIRS OF LONG CURTAINS LOAD ONE SHORT DRAINBACK PAN FINAL RINSE ARM THREE PAIRS OF OO 5 CURTAINS LONG CURTAINS AT UNLOAD SIDE OF UPPER ARMS LOAD ONE LONG CURTAIN AT UNLOAD END 27 UNLOAD ONE SHORT DRAINBACK PAN ONE LONG DRAINBACK PAN Fig 33 243 CURTAINS AND DRAINBACK PANS MODEL FT900SD Curtains and drainback pans must be in their proper places Fig 34 e Hang a short curtain at the unload side of every upper prewash wash and dual rinse arm e If equipped with a blower dryer hang another short curtain after the final rinse arm e Hang a long curtain on both sides of the prewash wash section joint e Hang two long curtains at the load end e Hang one long curtain at the unload end Drainback pan locations are shown for reference only FT900SD R TO L OPERATION 4 CENTER SECTION SHORT CURTAIN FINAL RINSE ARM ONLY WHEN DUAL RINSE ARM BLOWER DRYER WASH ARM PREWASH ARM IS PRESENT THREE SHORT CURTAINS AT UNLOAD SIDE OF UPPER ARMS ONE LONG CURTAIN TWO PAIRS OF AT UNLOAD END
4. FT900 SERIES DISHWASHERS MODELS ML 110668 U covers all of the following models FT900 FT900BD FT900S FT900SBD FT900D FT900DBD FT900SD FT900SDBD FT950 FT950BD 701 RIDGE AVENUE TROY OHIO 45374 0001 937 332 3000 www hobartcorp com FORM 44095 Rev B Jan 2013 TABLE OF CONTENTS OPERATION 3 Machine Preparation 3 Tank FI eaa eee eee oa 4 sues ogee eens 5 Empty Strainer Baskets During Operation as 6 oe bee Dee 6 2 2 6 Recommended Minimum 6 7 Cleaning the Top 9 Cleaning the Blower Dryer Air 10 DOs and DON Ts for Your New Hobart 10 Curtains and Drainback Pans Model FT900 950 11 Curtains and Drainback Pans Model 9 0 12 Curtains and Drainback Pans Model 9005 13 Curtains Drainback Pans Model 5 14
5. on the screen shows what action or command will occur by pressing the ENTER key The up down arrow icon in the display Shows the line on which the value or menu will change when pressing the UP or DOWN key A pair of solid arrows on the second line indicates that the displayed value is the value stored in the control A pair of hollow arrows on the second line indicates the value has been changed but has not yet been stored _ 16 Entering the Parameters Menu NOTE The parameters can be changed anytime the display is active which is when the machine is operating or in idle mode To enter the Parameters menu to edit options 1 Press the MENU key from the main screen a You will be prompted on screen asking if you wish to exit the menu 2 Press the UP or DOWN key repeatedly until you reach the Enter Security Cope screen 3 Press the ENTER key to indicate that you want to enter the code a You will now be prompted with Security on the top line and a single digit and three asterisks 0 on the bottom line 4 Use the UP and DOWN keys to change the digit of the Security Code to the appropriate value The default Security Code to enter Manager Mode is 1001 This code can be changed by anyone with this knowledge and it is recommended to change it from the default If the code is ever lost for some reason it can be reset by Hobart Service NOTE Resetting the code is not covered under yo
6. Machine Operation and Programming Security Levels 15 User Programming Instructions 16 Menu Display Prompts 16 Entering the Parameters 17 Navigating the Parameters Menu 17 Parameters Menu 18 Communications Setup 19 MAINTENANCE 2 2 2 222 ree ee Pheer bine os pwede 20 LINC ER eee ee bo bee ee bee es heehee eee es 20 _ ___ 20 5 ee Oe 20 Conveyor 20 Conveyor Drive 21 Conveyor Shaft Flange Bearings 21 Conveyor Take Up 21 Conveyor Speed Adjustment 21 TROUBLESHOOTING 6 22 Manual Reset Button on Pump Motors Conveyor Motor and Blower Dryer Motor 22 HOBART 2013 2 Operation and Care of FT900 SERIES DISHWASHERS SAVE THESE INSTRUCTIONS OPERATION MACHINE PREPARATION Check before beginning op
7. displays Pressed Conveyor may be jammed Check drains make sure they re closed Check tanks make sure they re full Ware Not Clean Insufficient pre scraping or tank water may need to be changed Missing end plug from wash arm Wash arm nozzle obstruction Water leaking past manifold O ring Loss of water pressure due to pump obstructions Disconnect electrical power supply ies and follow lockout tagout procedures Drain tank s and check for any obstructions at the pump intake Incorrect water temperature Check circuit breaker to electric heat supply or main steam valve Make certain valve is completely open Incorrect detergent dispensing Contact your chemical representative Manual overload on pump motor s may have tripped Wash arms installed incorrectly Ware not loaded properly Leaking Vacuum Foreign material or corrosion could be preventing proper valve operation Shut Breaker off all incoming water supply line s Unscrew and lift bonnet from valve body Clean valve and reassemble SYMPTOM POSSIBLE CAUSE NOTE If symptom s persist after possible causes have been checked contact Hobart Service Spotting of Ware Ware not loaded properly Incorrect final rinse water temperature minimum 180 F or inadequate water pressure 15 to 25 psi is recommended Incorrect rinse aid dispensing Contact your chemical representative Improper water hardness 3 grains or less pe
8. load end Fig 38 shows one of the conveyor bearings at the unload end 3 28 CONVEYOR TAKE UP UNIT GREASE FITTING 7 2 E w Milne GREASE FITTING BL i as a Fig 37 Fig 38 Conveyor Take Up Unit Lubricate the two conveyor take up unit guides at the load ends of the machine at least twice a year using the Chevron FM Grease ALC EP 2 provided for this purpose CONVEYOR SPEED ADJUSTMENT The conveyor speed comes preset from the factory Conveyor speed can be adjusted to run faster or slower by the customer Refer to User Programming pages 15 19 21 TROUBLESHOOTING Manual Reset Button on Pump Motors Conveyor Motor and Blower Dryer Motor In case any motor becomes overheated the thermal overload will cause the motor to not operate A manual reset button is provided on the junction box for each motor restart after the motor is allowed MOTOR RESET BUTTON to cool press the manual reset button on the motor i junction box Fig 39 If motor s continue to trip contact Hobart service SYMPTOM POSSIBLE CAUSE NOTE If symptom s persist after possible causes have been checked contact Hobart Service Machine Won t Operate Blown fuse or tripped circuit breaker at power supply After Start Button is Inspection door s not closed Door s Open
9. returns to the main screen and Exit Any settings that were changed are cancelled and revert back to the previous saved values 18 Communications Setup Menu The Communications Setup Menu Table 2 lists the parameter name a short description a list of possible values the parameter can have the factory default value based on the specific dishwasher model and the security level required to access that parameter COMMUNICATIONS SETUP MENU TABLE 2 Parameter Description Possible Default Security Name Values Value Required NAFEM DP Baud Adjusts the baud rate of communication between the 9600 dishwasher and a NAFEM Data Protocol NDP Gateway to 9600 M sold separately This must match the setting in the NDP 38 400 Gateway Refer to documentation that came with the NDP Gateway for instructions on where to find this value Exit to Params Exits the Communications Setup menu and returns to the Parameters menu Any settings that were changed are only saved by choosing the Save SETTINGS AND Exit option on the Parameters menu Changing communication values typically requires the machine power to be cycled NAFEM DP ID Adjusts the machine specific ID for use on a NAFEM Data Protocol network 5 Each device the network must have a unique ID Please refer to any documentation that came with other NDP compliant devices to verify that all IDs on the network are unique 18 MAINTENANCE WARNING Disconnect ele
10. the dual rinse tank when equipped is located towards the unload end of the machine from the control box Press the Power key on the keypad located on the lid of the control box Fig 8 The display will light up Fig 8 If door s are not closed Door s Open displays If all doors are closed Tanks Filling displays and tanks begin to fill All tanks will be full in approximately 10 to 15 minutes NOTE Opening a door during the fill cycle shuts off the fill valves Door s Open displays Close the door to resume the fill cycle Tanks Filling displays When all tanks are full the fill valves will automatically shut off and the water temperatures display for each tank The full time Auto Fill feature adds water to the tanks to maintain proper water levels during operation After the water level raises the lower float in each tank the wash rinse and dual rinse tanks if equipped begin to heat If the water level drops below the lower float in any tank the heat shuts off and filling resumes on the affected tank s When the water level reaches the lower float heating resumes while the tank s continue s filling until the proper water level is reached If the water level drops below the lower float in the prewash tank filling resumes until the water level reaches the upper float Electric Blower Dryer does not NOTE A red light is provided on machines with an electric Blower have an ON OFF S
11. ESENT POWER RINSE ARM WASH ARM PREWASH ARM CURTAINS AT UNLOAD SIDE M O FOUR SHORT OF UPPER ARMS NK THREE PAIRS OF ONE LONG CURTAIN LONG CURTAINS AT UNLOAD END UNLOAD beers LOAD TWO LONG amp TWO SHORT DUAL RINSE DRAINBACK PANS DRAINBACK PAN STRAINERS WASH DRAINBACK PAN FT900D FINAL RINSE ARM L TO R OPERATION 8 5 DUAL RINSE ARM PREWASH ARM WASH ARM POWER RINSE ARM 7 IS PRESENT 9 9 FOUR SHORT CURTAINS lt AT UNLOAD SIDE OF UPPER ARMS THREE PAIRS OF LONG CURTAINS 7 ONE LONG CURTAIN Ries DRAINBACK PANS DUAL RINSE STRAINERS DRAINBACK PAN WASH DRAINBACK PAN Fig 32 47 CURTAINS AND DRAINBACK PANS MODEL 9005 Curtains and drainback pans must be in their proper places Fig 33 e Hang a short curtain on the unload side of each upper prewash and wash arm e Hang a long curtain on both sides of every section joint e Hang two long curtains at the load end e Hang one long curtain at the unload end FT900S L OPERATION 4 CENTER SECTION FINAL RINSE ARM TWO SHORT CURTAINS AT UNLOAD SIDE Drainback pan locations are shown for reference only
12. FT950 OPERATION 8 CENTER SECTION 7 OOO OO THREE SHORT CURTAINS j AT UNLOAD SIDE OF UPPER ARMS FOUR PAIRS OF ONE LONG CURTAIN lt lt LONG CURTAINS AT UNLOAD END gt TWO LONG amp THREE SHORT DRAINBACK PANS FINAL RINSE DRAINBACK PAN STRAINER PREWASH ARM WASH ARM POWER RINSE ARM FINAL RINSE ARM FT900 AND FT950 L TO OPERATION 5565505 9 8 CENTER SECTION THREE SHORT CURTAINS AT UNLOAD SIDE FOUR PAIRS OF OF UPPER ARMS LONG CURTAINS _ ONE LONG CURTAIN AT UNLOAD END 22 LOAD UNLOAD TWO LONG amp THREE SHORT DRAINBACK PANS FINAL RINSE STRAINER DRAINBACK PAN Fig 31 11 CURTAINS AND DRAINBACK PANS MODEL FT900D Curtains and drainback pans must be in their proper places Fig 32 e Hang a short curtain at the unload side of every upper prewash wash power rinse and dual rinse arm e If equipped with a blower dryer hang another short curtain after the final rinse arm e Hang along curtain on both sides of the prewash wash section joint and the wash power rinse section joint e Hang two long curtains at the load end e Hang one long curtain at the unload end e Drainback pan locations are shown for reference only FT900D R TO L OPERATION 8 CENTER SECTION SHORT CURTAIN FINAL RINSE ARM 9 DUAL RINSE ARM PR
13. arms forward tilt front of arms upward to allow water to Remove arms Remove end caps Fig 18 Clean wash arms in a sink 22 22477777 17 CRESS Fig 16 Remove the flush arm at the load end of the machine Fig 19 Remove end cap Clean flush arm and nozzles in sink Remove the strainer baskets Fig 20 and strainer pans Fig 21 Also remove the dual rinse strainer if present Empty strainers in trash receptacle or food waste disposer DO NOT STRIKE STRAINER PANS OR STRAINER BASKETS ON SOLID OBJECT TO DISLODGE DEBRIS Scrub strainer pans and strainer baskets in a sink Qu ess gS When tanks are empty remove pump intake screens Fig 22 and clean them in a sink Remove clean and replace the strainer s from drainback pans in the power rinse and or wash section s where present Fig 23 refer to pages 11 14 Remove the dual rinse arms FT900D or FT900SD only Clean debris from metal dual rinse nozzles and arms using a straightened paper clip Fig 24 Do not attempt to clean Opti Rinse final rinse nozzle s Opti Rinse nozzle s should be replaced if they become clogged or if the spray pattern is ineffective Never use steel wool to clean warewasher surfaces Use only products formulated to be safe on stainless steel Sess 9 ss 4 4 STRAINER 7 4 Fig 22 Fig 23 Flush tanks with a water hose removing any accumulation of food soil Fig 25 Rei
14. be reset by Hobart Service NOTE Having Hobart Service reset the Manager Code is not covered under either the basic or the extended warranty _ 15 USER PROGRAMMING INSTRUCTIONS The dishwasher is equipped with electronic digital controls to allow greater precision for cleaning your ware maintaining required tank temperatures and other advanced functions Some of these functions are customized to suit the needs of your kitchen operation All customization is performed through the on screen menu using the UP DOWN MENU and START ENTER keys located on the keypad on the control box door Fig 35 DISPLAY POWER START or ENTER Ra STOP OPTI RIN Zp Equipped Fig 35 Menu Display Prompts The following prompts are used inside the menus e The UP and DOWN keys are used to change parameter values and to navigate the menu e The ENTER key is used to accept a value perform a specified action or enter a submenu Pressing this key while in the menu will not start the conveyor and pumps if not already on To start the machine while editing a menu press the green button on either end of the machine or exit the menu before pressing the START key The STOP key will always cancel what you are doing discard any changes you have made since the last save return you to the main screen and stop the machine The text just to the left or right of the circle icon
15. can be useful for example to allow the operator to adjust conveyor speed based on the volume of dishes entering the dish Low FR Temp Enables or disables a visual alarm on the display that Enabled Alarm indicates that Final Rinse water temperature is below the or Disabled NSF required minimum of 180 F 82 C When enabled a Disabled message will display notifying the user of this condition However machine operation will not change and ware will room without the need for intervention by a manager When disabled the only operation allowed by any user is the ability to enter the Security Code and exit the menu No parameters are allowed to be modified Change Mgr Code Sets a new Security Code for elevating access to the Manager Level It is recommended to change this from the default value and store the new code where all kitchen managers but no operators can access it Edit Enters the Communications Setup submenu where settings Communications for the NAFEM Data Protocol can be changed Please refer Setup to Communications Setup Menu Table 2 for more details Save Settings Exits the Parameters menu and returns to the main screen and Exit Any settings that were changed are saved and most become active immediately If one or more settings are not active immediately a message will display indicating that you need to cycle power to make them active Cancel Settings Exits the Parameters menu and
16. ctrical power supply ies and follow lockout tagout procedures before performing any maintenance procedure LINE STRAINERS Line strainers used in water or steam lines should be cleaned one week after machine installation and periodically thereafter LUBRICATION A list of acceptable lubricants as well as the lubricants themselves are available from your local Hobart Service Office Motors All motors have sealed bearings and require no lubrication maintenance Conveyor Gearmotor Check the oil level in the conveyor gearmotor at the unload end of the machine every six months by removing the gear case fill plug Fig 36 The oil level should be at the bottom of the fill plug hole Draining the gear case can be achieved by removing the Drain Plug Fig 36 and capturing and recycling the drained oil After rescrewing the Drain Plug back in the hole use only Mobilgear 630 to replenish or replace the oil GEAR CASE FILL PLUG DRAIN PLUG Fig 36 90 Conveyor Drive Chain Inspect the drive chain Fig 36 regularly and lubricate as required with Hykogeen Concentrate A supplied Conveyor Shaft Flange Bearings Located at both load and unload ends of the machine and at the front and back these bearings should be lubricated every four months Grease fittings at each of the four bearings a grease gun and 16 ounces of Chevron SRI 2 grease are provided for this purpose Fig 37 shows one of the take up units at the
17. d open the access doors Strainer Baskets are immediately inside at the front of the tanks Dual Rinse machines FT900D or FT900SD the strainer pan is located inside the machine behind the control box area Remove and clean the strainer pan periodically LOADING Pre scrap dishes thoroughly to remove large food particles and debris Never use steel wool on ware to be loaded into the dishwashing machine this could introduce surface corrosion which could eventually interfere with machine operation All plates saucers trays etc should be loaded on the conveyor in an inclined position Bowls should be loaded upside down Silverware must be washed in racks to prevent loss of items unless the optional silverware conveyor is used failing to do so could cause the conveyor to jam and damage ware or machine components DO NOT attempt to wash large items pots pans trays etc without first checking to make sure they will fit through the machine opening Such items must not be washed in this dishwasher unless they will easily pass through it Do not allow foreign objects to enter the unit especially metallic contaminants UNLOADING Remove dishes from the conveyor If a dish pushes against the conveyor trip arm Fig 12 the conveyor stops and the pumps run for one minute before shuting off Unload the conveyor starting with the ware furthest from the trip arm Remove the dish that is striking the trip arm last The machine automa
18. does not require a security code to be entered by the user but is only accessible if enabled by a manager or by Hobart Service A SuperOperator is granted access to a few of the menu options but not as many as in the Manager security level The available options for a SuperOperator are described in the Parameters Menu Table 1 and the Communications Setup Menu Table 2 described above A manager or Hobart Service technician can enable or disable this security level via the AccEss parameter Refer to Navigating the Parameters Menu for more details Manager This security level is the highest level attainable by the user It requires the Manager Code to be entered before the security level will be elevated to Manager This security level offers unrestricted access to all of the options listed in the Parameters Menu Table 1 and the Communications Setup Menu Table 2 above Because of this it is recommended that power to the machine be cycled off and on when access to the Manager level options are no longer explicitly needed The Security Code for the Manager level can be changed by a kitchen manager or anyone with the Manager Code The default code is listed in the section titled Entering the Parameters Menu As such it is recommended that this code be changed from the default and stored in a safe place where all kitchen managers but no one else can access it If the code is ever lost or forgotten it can
19. eration Open the machine doors and make sure all components are in their proper operating positions Pump Intake Screens must be put on Strainer Pans must place ontop of Strainer Baskets must be in place holders at each pump intake Fig 1 each tank Fig 2 Strainer Pans Fig wae ages PSE gt 222532 Fig 3 End Caps must be correctly installed at Wash Arms must be properly installed The Flush Arm at load end must be ends of all Wash Arms Fig 4 and latched in place Fig 5 properly installed Fig 6 The Final Rinse Arm and Dual Rinse Arm when present must be properly installed Fig 7 Curtains and drainback pans must be in their 8 2 proper places refer to pages 11 14 wh 111111 Fig 7 TANK FILLING Assure proper water hardness Recommended water hardness is 3 grains or less per gallon Higher hardness may cause excessive formation of lime scale Chlorides must not exceed 50 ppm All water and steam if equipped supply valves must be opened and the electric supply turned on before the machine will function Close all drains and doors The drain handles are located near the floor at the front of each tank Rotate drain handles clockwise to the vertical position The prewash tank powerwash tank and power rinse tank when equipped and their respective drain handles are located towards the load end of the machine from the control box The drain handle for
20. is placed in Standby by pressing the POWER key 3 An invalid Security Code is entered the ENTER Security screen The following names and descriptions of the various security levels are listed from the lowest level to the highest level A higher security level includes all of the abilities of the lower levels plus some extra abilities as described below NOTE The letter s to the right of the name are the same as the letter s you will see on the lower left of the SEcurity screen Refer to Entering the Parameters Menu for more details NOTE The security level does not by itself affect the operation of the machine or inhibit the use of any of the Start Stop or Power keys or buttons All of these basic functions are always available in any security level Operator This is the most basic security level and is the one that is enabled by default when the unit is powered up as initially set by the factory No security code is required to enter this security level This level only allows entering of the Security Code to elevate the current security level to something higher SuperOperator SO This security level can be set up to be the default level when the unit is powered up instead of the Operator security level If it is set up to be the default level the Operator security level will not be accessible until SuperOperator Access is disabled by a manager or by Hobart Service The SuperOperator level
21. ly DO use only detergents recommended by your chemical professional DO at the end of the day thoroughly cleanse the machine rinse and dry leave doors open DO closely follow your chemical professional s prescribed deliming schedule DO use only products formulated to be safe on stainless steel DO NOT over soften water recommended water hardness range is 3 grains or less per gallon DO NOT use detergents formulated for residential dishwashers DO NOT allow food soil to accumulate on the tank bottom DO NOT exceed chemical manufacturer s recommended concentrations for detergent rinse aid or lime scale remover DO NOT use steel wool to clean ware or dishwasher surface DO NOT allow foreign objects to enter the unit especially metallic contaminants NOTE Failure to follow use care and maintenance instructions may void your Hobart dishwasher warranty 40 CURTAINS AND DRAINBACK PANS MODEL FT900 AND FT950 Curtains and drainback pans must be in their proper places Fig 31 e Hang a short curtain on the unload side of each upper prewash wash and power rinse arm e Hang a long curtain on both sides of every section joint e Hang two long curtains at the load end e Hang one long curtain at the unload end Drainback pan locations are shown for reference only FINAL RINSE ARM POWER RINSE ARM WASH ARM PREWASH ARM FT900 AND
22. nstall all end caps do not overtighten Reinstall all arms in their proper location and orientation The Flush arm nozzles must point horizontal toward the prewash tank Upper arm nozzles point downward and lower arm nozzles point upward Arms in the prewash chamber each have two tubes the slightly longer arm goes below The arms with five tubes fit in the upper brackets and the arms with four tubes fit in the lower brackets To install arms slide manifolds on the guides toward the rear of the machine Fig 26 Then latch arms in place Fig 27 Fig 25 CLEAN SENSOR OPENINGS AT LOAD END OF MACHINE Replace the pump intake screens strainer pans and strainer baskets Rehang the curtains refer to pages 11 14 Leave the machine doors open to allow the interior to air out and dry Clean machine exterior like any other stainless steel appliance Use damp cloth and mild soapy water Flush the openings where the sensors are located at the load end of the machine Fig 28 Do not attempt to clean these openings with any metallic object as damage to sensors can occur 8 CLEANING THE TOP DUCT WARNING Disconnect electrical power supply ies and follow lockout tagout procedures before you begin cleaning Debris and airborne particles will settle on the Top Covers and the surfaces inside the Top Duct The Top Duct should be cleaned about every two weeks as appropriate for your location There are two handles on each
23. of the removable Top Covers so they can be lifted or moved to access the inside of the Top Duct for cleaning Fig 29 Before draining and cleaning the machine perform the following cleaning task Use an appropriate ladder and both hands to remove each Top Cover Clean inside the Top Duct with mild detergent warm water solution and brush cloth or sponge Clean the Top Duct from the of the machine towards the Loap Enb necessary the Top Duct may be hosed down Rinse with clean water Clean both sides of the Top Covers individually while they are removed After cleaning the Top Duct and the Top Covers replace each Top Cover in its correct location After cleaning the Top Duct clean the dishwasher as discussed on pages 7 8 TOP DUCT TOP COVER REMOVED BOTTOM OF DUCT Fig 29 CLEANING THE BLOWER DRYER AIR FILTER At least twice each month the air filter when present Fig 30 blower dryer should be removed and cleaned a sink with warm soapy water and hosed off with clean water The air filter can be washed in the dishwasher and flushed with clean water after washing Replacement air filters are available contact Hobart service BLOWER DRYER FILTER UP AND PULL FORWARD _ TO REMOVE R L OPERATION SHOWN Fig 30 DOs AND DON Ts FOR YOUR NEW HOBART DISHWASHER DO assure proper water hardness of 3 grains or less per gallon DO pre scrap dishes thorough
24. r gallon is recommended Incorrect detergent for water type Clogged rinse nozzle s Misaligned rinse arms Rinse arms should be positioned so that they align in hub on chamber wall Inadequate Rinse Dirty line strainers causing reduced water flow Turn off water supply remove strainer cap withdraw and clean screens Low supply line pressure Rinse Arm s are not properly inserted in the hubs Clogged Dual Rinse Nozzle s on FT900D or FT900SD clean the Nozzle s Dual Rinse Tank Strainer Pan is clogged on FT900D or 90050 clean the Strainer Pan Continuous Rinse Photoelectric sensors are blocked Clean sensor openings Fig 40 Operation Remove side panels from load end of machine adjacent to prewash chamber With machine power on verify indicators on sensor Fig 41 flash on and off when blocking and unblocking the sensor Improperly operating rinse solenoid valve Contact Hobart Service Problems with conveyor motor drive Put machine in Standby by pressing the Power key for at least 60 seconds to allow drive and motor to fully discharge and reset Turn machine back on If problem persists contact Hobart Service CLEAN SENSOR OPENINGS AT LOAD END OF MACHINE ELECTRONIC SENSOR AT LOAD END Fig 40 Fig 41 SYMPTOM POSSIBLE CAUSE NOTE If symptom s persist after possible causes have been checked contact Hobart Service Tanks Not Heating Low water safety devices sh
25. rs and check water level of all tanks Water should be about 1 inch down from top of strainer pan or higher Do not forget to check the water level of the dual rinse tank models FT900D or FT900SD which is located behind the control box directly beneath the final rinse arms Close inspection doors If tanks fail to fill after another 20 minutes contact Hobart Service Reset Required Place machine in Standby by pressing the Power key Wait at least 60 seconds before powering on the machine 5 26 5 SLNAININOD ASNIY TWNIS JISNIY ASNIY YAMOd 1 YNVL HSYM YNVLHSvVMaua 141 8 AVG 28 FORM 44095 Rev B Jan 2013
26. tically restarts TRIP ARM Fig 12 RECOMMENDED MINIMUM TEMPERATURES The water temperatures in the tanks and rinse arms are monitored electronically and are displayed on the control box keypad display The display should be checked periodically to assure that proper temperatures are being maintained NOTE Refer to the HOT WATER SANITIZING label on the right side of the control box for minimum temperature ratings CLEANING The dishwasher MUST be thoroughly cleaned at the end of each working shift or after each meal Push the Power key on the keypad to turn the machine OFF WARNING Disconnect electrical power supply ies and follow lockout tagout procedures before you begin cleaning Open all front access doors Drain the machine by rotating the drain handles counterclockwise to a horizontal position Drain handles are located near the floor at the front of each tank On Dual Rinse machines FT900D or FT900SD the dual rinse tank drain handle is located to the side of the control box on the unload end of the machine Draining the tanks requires approximately 5 to 10 minutes Remove and clean the curtains Before removing strainer baskets and pans clean the interior and all tank shelves using a good hose with spray nozzle Figs 13 15 Flush all debris toward the strainers Fig 13 Remove the wash arms by first releasing the latches Fig 16 Slide upper arms forward swinging front of arm down Fig 17 Slide lower
27. u allows these changes Within the Parameters Menu the manager or operator in some cases may modify factory default settings The menu structure and description of each option are detailed below Please contact Hobart Service if you are uncomfortable changing any setting or are unsure of which one s to change Parameters Menu Table 1 lists the parameter name a short description a list of possible values the parameter can have the factory default value based on the specific dishwasher model and the security level required to access that parameter PARAMETERS MENU TABLE 1 Parameter Description Possible Default Security Name Values Value Conveyor Speed Adjusts the speed of the conveyor in feet per FT900 minute Increasing the value can increase the FT900D throughput of ware but can decrease the ability FT900S to sufficiently clean difficult items such as food FT900SD particles cooked onto pots and pans FT950 continue to run through the machine as expected When disabled there will be no extra message indicating a low temperture event however the temperature display will still show the current Final Rinse water temperature SuperOp Access Enables or disables the SuperOperator access level Enabled When enabled this allows any user to modify values in or Disabled the Parameters Menu that are marked as requiring only Disabled SO security without entering a password This
28. ur warranty whether you are in the initial warranty period or in the extended warranty period 5 Press the ENTER key to move to the next digit to the right 6 Repeat steps 4 and 5 for each digit a After pressing ENTER on the fourth digit you will immediately return to the ENTER SECURITY screen 7 You will Know you entered the code correctly if the letter in the lower left corner reads M Refer to Machine Operation and Programming Security Levels on page 15 for more details on other letters that may appear a If it does not match repeat steps 3 through 7 b If it does match continue to step 8 8 Press the UP or DOWN keys repeatedly until you reach the Parameters screen a If you do not see this screen after scrolling all of the way through the Security Code was not entered properly Repeat the steps starting from 2 9 Press the ENTER key a You are now in the Parameters edit menu the display shows the first editable parameter Navigating the Parameters Menu NOTE The security level must be elevated to the Super Operator or higher to enter the Parameters Menu Refer to Machine Operation and Programming Security Levels on page 15 for more details Hobart believes that the default settings that leave the factory are suitable for the majority of kitchen operations However there are cases where kitchen managers may find the need to change one or more options Parameters Menu Table 1 the Parameters Men
29. ut off heat Check for proper water level Lower float s do not move freely Circuit breaker s to heat system tripped electric heat Steam supply valve s are not opened completely or supply pressure too low steam heat Overtemp protector tripped electric heat Contact Hobart Service Failed heating element electric heat Contact Hobart Service Bucket trap not functioning correctly steam heat Contact Hobart Service Improperly operating steam solenoid valve s steam heat Contact Hobart Service No Fill or Slow Fill Door s are open Main fill water supply valve could be closed Upper and or lower fill floats do not move freely Dirty line strainer Fig 42 causing reduced water flow Turn off water supply remove strainer cap withdraw and clean screens Problem with solenoid valve Contact Hobart Service Low incoming water supply pressure Drain s open No Blower Dryer Heat Blower or motor not operating properly Electric Heat Blower Circuit breaker to electric blower dryer heaters tripped Dryer Overtemp protector tripped red overtemp indicator light is lit Contact Hobart Service No Blower Dryer Heat Blower or motor not operating properly Steam Blower Dryer Improperly operating steam solenoid valve when equipped Steam supply valve is not completely open or supply pressure is too low Bucket trap not functioning correctly Missing or dirty filter
30. witch but does Dryer The operator is alerted by the lighted red light Fig 9 that over temperature thermostat has been activated If light stays on for more than 5 minutes the operator should TURN THE MACHINE OFF DISCONNECT POWER TO THE MACHINE AND HAVE IT If red indicator lights SERVICED BY A QUALIFIED SERVICE TECHNICIAN Discounecttionipowersusnly e Have unit serviced by qualified technician RED Fig 9 DISHWASHING Start the motors for the conveyor pumps and blower dryer STOP red and START green Switches if equipped by pressing the green START switch located ee 7 at either the load or unload end of the machine Fig 10 or on the control box Fig 11 The machine will operate only if the tanks have filled to the proper level and all doors are closed Press the red STOP switch Fig 10 11 to stop STOPL lt a the conveyor pumps and blower dryer motors red gt Ss STARTI green All tank temperatures display on the keypad display when the machine is in operation Final Rinse temperature reads until ware reaches the rinse zone When ware reaches the rinse zone the Final Rinse water temperature displays After the ware exits the rinse zone Final Rinse temperature again reads Fig 10 Alternative Temperature Display Names Table A below shows the possible temperature names that may appear on the keypad displa
31. y The Long Name is equivalent to the Short Name Displays vary for different FT900 models ALTERNATIVE TEMPERATURE DISPLAY NAMES TABLE A Dual Rinse Tank OR Fig 11 If ware reaches the unload end of the machine and trips the dish limit switch the conveyor and final rinse shut off and the display alternates between the tank temperatures and Unload Dishes After ware is removed and the dish limit switch resets normal operation resumes If ware is not unloaded and the dish limit switch does not reset the Dish Limit Auto Timer counts down for one minute then shuts off pumps and blower dryer The display continues to alternate between the tank temperatures and Unload Dishes Unloading ware will reset the dish limit switch allowing the machine to automatically resume normal operation If no ware enters the machine for a preset amount of time the Auto Timer automatically shuts off the machine Tanks continue to heat and temperatures tanks not final rinse display To resume operation press the green START switch located at either end of the machine or on the control box NOTE The Auto Timer shut off setting can be adjusted by your Hobart service technician the range is from 1 to 12 minutes EMPTY STRAINER BASKETS DURING OPERATION AS NECESSARY The Strainer Baskets must be emptied periodically during operation to prevent them from over filling which would adversely affect dishwasher operation STOP the machine an
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