FT900 SERIES DISHWASHERS MODELS ML-110668-U covers all of the following models: FT900 FT900BD FT900S FT900SBD FT900D FT900DBD FT900SD FT900SDBD FT950 FT950BD 701 s. RIDGE AVENUE TROY, OHIO 45374-0001 937 332-3000 www.hobartcorp.com FORM 44095 Rev. B (Jan.
Table of Contents Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Machine Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Tank Filling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Dishwashing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation and Care of FT900 SERIES DISHWASHERS SAVE THESE INSTRUCTIONS OPERATION MACHINE PREPARATION — Check before beginning operation. Open the machine doors and make sure all components are in their proper operating positions. Pump Intake Screens must be put on holders at each pump intake (Fig. 1). Strainer Pans must be in place on top of each tank (Fig. 2). Strainer Baskets must be in place in Strainer Pans (Fig. 3). Fig. 1 Fig. 2 Fig.
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.
DISHWASHING Start the motors for the conveyor, pumps and blower-dryer (if equipped) by pressing the green START switch located 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 or 11) to stop the conveyor, pumps and blower-dryer motors.
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 and open the access doors; Strainer Baskets are immediately inside at the front of the tanks. On 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.
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. 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.
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).
CLEANING THE TOP DUCT 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 of the removable Top Covers so they can be lifted or moved to access the inside of the Top Duct for cleaning (Fig. 29).
CLEANING THE BLOWER-DRYER AIR FILTER At least twice each month, the air filter (when present, Fig. 30) on the blower-dryer should be removed and cleaned in 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 LIFT UP AND PULL FORWARD TO REMOVE R – L OPERATION SHOWN Fig.
CURTAINS AND DRAINBACK PANS, MODEL FT900 AND FT950 Curtains and drainback pans must be in their proper places, Fig. 31 . . . • Hang a short curtain on the unload side of each upper prewash, wash and power rinse arm. • Hang a long curtain on both sides of every section joint. • Hang two long curtains at the load end. • Hang one long curtain at the unload end. • Drainback pan locations are shown for reference only. Fig.
CURTAINS AND DRAINBACK PANS, MODEL FT900D Curtains and drainback pans must be in their proper places, Fig. 32 . . . • Hang a short curtain at the unload side of every upper prewash, wash, power rinse and dual rinse arm. • If equipped with a blower-dryer, hang another short curtain after the final rinse arm. • Hang a long curtain on both sides of the prewash / wash section joint and the wash / power rinse section joint. • Hang two long curtains at the load end.
CURTAINS AND DRAINBACK PANS, MODEL FT900S Curtains and drainback pans must be in their proper places, Fig. 33 . . . • Hang a short curtain on the unload side of each upper prewash and wash arm. • Hang a long curtain on both sides of every section joint. • Hang two long curtains at the load end. • Hang one long curtain at the unload end. • Drainback pan locations are shown for reference only.
CURTAINS AND DRAINBACK PANS, MODEL FT900SD Curtains and drainback pans must be in their proper places, Fig. 34 . . . • Hang a short curtain at the unload side of every upper prewash, wash and dual rinse arm. • If equipped with a blower-dryer, hang another short curtain after the final rinse arm. • Hang a long curtain on both sides of the prewash / wash section joint. • Hang two long curtains at the load end. • Hang one long curtain at the unload end. • Drainback pan locations are shown for reference only.
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.
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).
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 Code? screen. 3) Press the ENTER key to indicate that you want to enter the code. a.
Parameters Menu The 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 Name Description Model Possible Values Default Value Security Required Conveyor Speed Adjusts the speed of the conveyor in feet per minute.
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 Name Description NAFEM DP Baud Adjusts the baud rate of communication between the dishwasher and a NAFEM Data Protocol (NDP) Gateway (sold separately).
MAINTENANCE Disconnect electrical 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 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 load end; Fig.
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. To restart after the motor is allowed to cool, press the manual reset button on the motor junction box (Fig. 39). If motor(s) continue to trip, contact Hobart service. MOTOR RESET BUTTON Fig.
SYMPTOM POSSIBLE CAUSE NOTE: If symptom(s) persist after possible causes have been checked, contact Hobart Service. Spotting of Ware. 1. Ware not loaded properly. 2. Incorrect final rinse water temperature (minimum 180°F) or inadequate water pressure (15 to 25 psi is recommended). 3. Incorrect rinse aid dispensing. Contact your chemical representative. 4. Improper water hardness (3 grains or less per gallon is recommended). 5. Incorrect detergent for water type. 6. Clogged rinse nozzle(s). 7.
SYMPTOM POSSIBLE CAUSE NOTE: If symptom(s) persist after possible causes have been checked, contact Hobart Service. Tanks Not Heating. 1. Low water safety devices shut off heat. Check for proper water level. 2. Lower float(s) do not move freely. 3. Circuit breaker(s) to heat system tripped (electric heat). 4. Steam supply valve(s) are not opened completely or supply pressure too low (steam heat). 5. Overtemp protector tripped (electric heat). Contact Hobart Service. 6.
SYMPTOM POSSIBLE CAUSE 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.
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FORM 44095 Rev. B (Jan.