Hobart FT900D, FT900SD, FT950BD, FT900SDBD, FT900DBD User Manual 2

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. 2013)

TABLE OF CONTENTS

OPERATION .................................................................3

Machine Preparation ......................................................3

Tank Filling ..............................................................4

Dishwashing .............................................................5

Empty Strainer Baskets During Operation as Necessary ...........................6

Loading .................................................................6

Unloading ...............................................................6

Recommended Minimum Temperatures ........................................6

Cleaning ................................................................7

Cleaning the Top Duct ..................................................9

Cleaning the Blower-Dryer Air Filter ......................................10

DOs and DON'Ts for Your New Hobart Dishwasher ..............................10

Curtains and Drainback Pans, Model FT900 and FT950 ..........................11

Curtains and Drainback Pans, Model FT900D ..................................12

Curtains and Drainback Pans, Model FT900S ..................................13

Curtains and Drainback Pans, Model FT900SD .................................14

Machine Operation and Programming Security Levels ...........................15

User Programming Instructions .............................................16

Menu Display Prompts ................................................16

Entering the Parameters Menu ..........................................17

Navigating the Parameters Menu ........................................17

Parameters Menu ....................................................18

Communications Setup Menu ...........................................19

MAINTENANCE .............................................................20

Line Strainers ...........................................................20

Lubrication .............................................................20

Motors .............................................................20

Conveyor Gearmotor ..................................................20

Conveyor Drive Chain .................................................21

Conveyor Shaft Flange Bearings ........................................21

Conveyor Take-Up Unit ................................................21

Conveyor Speed Adjustment ...............................................21

TROUBLESHOOTING ........................................................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 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).

Fig. 1

End Caps must be correctly installed at
ends of all Wash Arms (Fig. 4).

Strainer Pans must be in place on top of
each tank (Fig. 2).

Fig. 2

Wash Arms must be properly installed
and latched in place (Fig. 5).

Strainer Baskets must be in place in
Strainer Pans (Fig. 3).

Fig. 3

The Flush Arm at load end must be
properly installed (Fig. 6).

Fig. 4

The Final Rinse Arm (and Dual Rinse Arm when
present) must be properly installed (Fig. 7).

Fig. 7

Fig. 5

Fig. 6

Curtains and drainback pans must be in their
proper places, refer to pages 11 – 14.

– 3 –

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 oor 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 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 ll. All tanks will be full in approximately 10 to 15 minutes. NOTE: Opening a door during the
ll cycle shuts off the ll valves (Door(s) Open displays). Close the door to resume the ll cycle (Tanks

Filling ... displays).

When all tanks are full the ll 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 oat in each tank, the wash, rinse and dual rinse tanks, if equipped,
begin to heat. If the water level drops below the lower oat in any tank, the heat shuts off and lling resumes
on the affected tank(s). When the water level reaches the lower oat, heating resumes while the tank(s)
continue(s) lling until the proper water level is reached. If the water level drops below the lower oat in
the prewash tank, lling resumes until the water level reaches the upper oat.

Electric Blower-Dryer, does not

NOTE: A red light is provided on machines with an electric Blower-

Dryer. The operator is alerted by the lighted red light (Fig. 9) that

have an ON / OFF Switch, but does
have a Red Indicator Light

the 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
SERVICED BY A QUALIFIED SERVICE TECHNICIAN.

! WARNING

If red indicator lights:

• Disconnect from power supply

• Have unit serviced by qualified
technician

– 4 –

RED

Light Only

Fig. 9

DISHWASHING

STOP

(red)

START
(green)

Start the motors for the conveyor, pumps and blower-dryer
(if equipped) by pressing the green START switch located

STOP (red) and START (green) Switches
(push-button) are located on the load and
unload ends of the machine.

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 lled 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.

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 display. The Long Name is equivalent to the Short Name. Displays
vary for different FT900 models.

ALTERNATIVE TEMPERATURE DISPLAY NAMES — TABLE A

Indicated Temperature Long Name Short Name

PreWash Tank PreWash PW

Wash Tank Wash Wsh

Power Rinse Tank Rinse Rns

Dual Rinse Tank DualRinse DR

Final Rinse FinalRinse FnlRns

Fig. 11

If ware reaches the unload end of the machine and trips the dish limit switch, the conveyor and nal

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 nal 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.

– 5 –

EMPTY STRAINER BASKETS DURING OPERATION AS NECESSARY

The Strainer Baskets must be emptied periodically during operation to prevent them from over lling,

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.

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 rst checking to make sure they
will t 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
automatically 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.

– 6 –

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 oor 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 Fig. 14 Fig. 15

Remove the wash arms by rst releasing the latches (Fig. 16). Slide upper arms forward, swinging

front of arm down (Fig. 17). Slide lower arms forward, tilt front of arms upward to allow water to drain.
Remove arms. Remove end caps (Fig. 18). Clean wash arms in a sink.

Fig. 16 Fig. 17 Fig. 18

Remove the ush arm at the load end of the machine (Fig. 19). Remove end cap. Clean ush 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.

STRIKE STRAINER PANS OR STRAINER BASKETS ON SOLID OBJECT TO DISLODGE DEBRIS. Scrub

strainer pans and strainer baskets in a sink.

DO NOT

Fig. 19 Fig. 20 Fig. 21

– 7 –

When tanks are empty, remove pump intake screens (Fig. 22) and clean them in a sink. Remove, clean

CLEAN SENSOR OPENINGS
AT LOAD END OF MACHINE

STRAINER

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 nal 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.

Fig. 22 Fig. 23 Fig. 24

Flush tanks with a water hose, removing any accumulation of food
soil (Fig. 25).

Reinstall 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 ve tubes t in the upper brackets, and
the arms with four tubes t 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. 26 Fig. 27

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.

Fig. 25

Fig. 28

– 8 –

CLEANING THE TOP DUCT

TOP DUCT

TOP COVER REMOVED

BOTTOM OF 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).

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 Unload End of the machine towards the
load En d. If 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.

Fig. 29

– 9 –