Bunn Coffee Maker FMD DBC-3 Service Manual

FMD DBC-3

FMDA DBC-3

SN FMD0013000-UP

OPERATING & SERVICE MANUAL

BUNN-O-MATIC CORPORATION

POST OFFICE BOX 3227

SPRINGFIELD, ILLINOIS 62708-3227

PHONE: (217) 529-6601 FAX: (217) 529-6644

www.bunn.com

BUNN-O-MATIC COMMERCIAL PRODUCT WARRANTY

Bunn-O-Matic Corp. (“BUNN”) warrants equipment manufactured by it as follows:

1) All equipment other than as specified below: 2 years parts and 1 year labor.

2) Electronic circuit and/or control boards: parts and labor for 3 years.

3) Compressors on refrigeration equipment: 5 years parts and 1 year labor.

4) Grinding burrs on coffee grinding equipment to grind coffee to meet original factory screen sieve analysis: parts and labor for 3 years or 30,000 pounds of coffee, whichever comes first.

These warranty periods run from the date of installation BUNN warrants that the equipment manufactured by it will be commercially free of defects in material and workmanship existing at the time of manufacture and appearing within the applicable warranty period. This warranty does not apply to any equipment, component or part that was not manufactured by BUNN or that, in BUNN’s judgment, has been affected by misuse, neglect, alteration, improper installation or operation, improper maintenance or repair, damage or casualty. This warranty is conditioned on the Buyer 1) giving BUNN prompt notice of any claim to be made under this warranty by telephone at (217) 529-6601 or by writing to Post Office Box 3227, Springfield, Illinois 62708-3227; 2) if requested by BUNN, shipping the defective equipment prepaid to an authorized BUNN service location; and 3) receiving prior authorization from BUNN that the defective equipment is under warranty.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY OTHER WARRANTY, WRITTEN OR ORAL, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF EITHER MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. The agents, dealers or employees of BUNN are

not authorized to make modifications to this warranty or to make additional warranties that are binding on BUNN. Accordingly, statements by such individuals, whether oral or written, do not constitute warranties and should not be relied upon.

If BUNN determines in its sole discretion that the equipment does not conform to the warranty, BUNN, at its exclusive option while the equipment is under warranty, shall either 1) provide at no charge replacement parts and/ or labor (during the applicable parts and labor warranty periods specified above) to repair the defective components, provided that this repair is done by a BUNN Authorized Service Representative; or 2) shall replace the equipment or refund the purchase price for the equipment.

THE BUYER’S REMEDY AGAINST BUNN FOR THE BREACH OF ANY OBLIGATION ARISING OUT OF THE SALE OF THIS EQUIPMENT, WHETHER DERIVED FROM WARRANTY OR OTHERWISE, SHALL BE LIMITED, AT BUNN’S SOLE OPTION AS SPECIFIED HEREIN, TO REPAIR, REPLACEMENT OR REFUND.

In no event shall BUNN be liable for any other damage or loss, including, but not limited to, lost profits, lost sales, loss of use of equipment, claims of Buyer’s customers, cost of capital, cost of down time, cost of substitute equipment, facilities or services, or any other special, incidental or consequential damages.

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USER NOTICES (cont.)

WARNING!

Fill water tank before turning - on thermostat or connecting appliance to power source. Use only on a properly protected circuit capable of the rated load. Electrically ground the chassis. Follow national/local electrical codes. Do not use near combustibles.

FAILURE TO COMPLY RISKS EQUIPMENT

DAMAGE, FIRE, OR SHOCK HAZARD

READ THE ENTIRE OPERATING MANUAL

BEFORE BUYING OR USING THIS PRODUCT

THIS APPLIANCE IS HEATED WHENEVER

CONNECTED TO A POWER SOURCE

00831.0000

This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the Food and Drug Administration (FDA). For models installed outside the U.S.A., comply with the applicable Plumbing /SanitationCode.

00656.0000

29216.0000

CONTROL THERMOSTAT ADJUSTMENT

200 F 190 F

APPROXIMATE THERMOSTAT TEMPERATURE SETTINGS

28368.0001

180 F

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INITIAL SET-UP

1. Locate the drip tray assembly above the dispenser nested in the packing material.

2. Remove the drip tray and the drip tray cover and set them aside.

3. Remove the water strainer assembly from the drip tray and set it aside.

4. Remove the four legs from the packaging material, apply non-skid pads to the bottom of the legs and securely install the legs in the dispenser base.

ELECTRICAL REQUIREMENTS

CAUTION - The dispenser must be disconnected from the power source until specified in

The 120 volt version of this dispenser has an attached cordset. The mating connector must be a NEMA 5-15R. The 120/208 volt and the 120/240 version of this dispenser has an attached cordset. The mating connector must be a NEMA 14-20R. The 240 volt version of this dispenser has an attached cordset without plug. The 230 volt version of this dispenser has an attached cordset without plug.

Electrical Hook-Up.

ELECTRICAL HOOK-UP

CAUTION - Improper electrical installation will damage electronic components.

1. An electrician must provide electrical service as specified.

2. Using a voltmeter, check the voltage and color coding of each conductor at the electrical source.

3. Open the front door of the dispenser and place the heater switch in the “OFF” (upper) position.

4. Connect the dispenser to the power source.

5. If plumbing is to be hooked up later be sure the dispenser is disconnected from the power source. If plumbing has been hooked up, the dispenser is ready for

Initial Fill & Heat.

PLUMBING REQUIREMENTS

This dispenser must be connected to a COLD WATER system with operating pressure between 20 and 90 psi from a 1⁄2" or larger supply line. A shut-off valve should be installed in the line before the dispenser. Install a regulator in the line when pressure is greater than 90 psi to reduce it to 50 psi. The water inlet fitting is 1⁄4" flare. NOTE - Bunn-O-Matic recommends 1⁄4" copper tubing for installations of less than 25 feet and 3⁄8" for more than 25 feet from the 1⁄2" water supply line. At least 18 inches of an FDA approved flexible beverage tubing, such as reinforced braided polyethylene or silicone, before the dispenser will facilitate movement to clean the countertop. Bunn-O-Matic does not recommend the use of a saddle valve to install the dispenser. The size and shape of the hole made in the supply line by this type of device may restrict water flow.

This equipment must be installed to comply with the Basic Plumbing Code of the Building Officials and Code Administrators International, Inc. (BOCA) and the Food Service Sanitation Manual of the Food and Drug Administration (FDA). For models installed outside the U.S.A., you must comply with the applicable Plumbing/Sanitaion Code for your area.

PLUMBING HOOK-UP

1. Securely attach the short piece of tubing on the water strainer assembly to the inlet fitting on the bottom of the dispenser.

2. Flush the water line and securely attach it to the flare fitting on the water strainer assembly.

3. Turn on the water supply.

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INITIAL FILL & HEAT

CAUTION - The dispenser must be disconnected from the power source throughout the initial fill & heat, except

when specified in the instructions.

1. Turn on the water supply and connect the dispenser to the power source.

2. Water will automatically flow into the tank to the proper level and then shut-off. This will take less than five minutes.

3. When the tank is full of water, open the front door and place the heater switch in the “ON” (lower) position. A tank full of cold water will take approximately forty minutes for the water to heat on 120 volt versions, and twenty minutes on 120/240, 240 and 230 volt versions.

During this waiting period, complete these dispenser set-up steps:

a. Place a set of keyholes in the splash panel over the screws beneath the hopper access door and push down gently. b. Place the drip tray onto the supports on the splash panel. Hook the tabs on the rear of the drip tray through the holes in the splash panel. Set the drip tray cover in place. c. Fill the hopper(s) with the dry product to be dispensed.

LIQUID LEVEL CONTROL

The system automatically maintains the hot water tank’s level by energizing the refill solenoid when the water level drops below the liquid level probe. If the system has not successfully refilled in 15 minutes, a refill error occurs.

When a refill error occurs, the refill solenoid is de-energized and the 3 position L.E.D.’s will flash sequentially; left...center...right...left...center...right...etc.

Once the cause of the refill error has been investigated (see the troubleshooting guide) and cured, the system can be reset by either disconnecting (for at least 5 seconds) and then reconnecting the power to the machine, or by entering one of the program modes (see Programming Modes.)

RINSE TIMER

The dispenser is shipped from the factory with the rinse timer disabled. To enable the rinse timer, remove power from the dispenser, remove the lower access panel, and remove the jumper from J4 of the control board. For dispensers with hot water dispense, remove power from the dispenser, remove the lower access panel, and disconnect the green wires coming from J4 of the control board from each other. Replace the lower access panel, and return power to the dispenser.

When enabled, the rinse timer automatically keeps track of the time since the dispenser was last run through a rinse sequence. If the dispenser detects that a rinse sequence has not been run for 8 hours, all three position L.E.D.’s will flash continually. If, after an additional 4 hours (12 hours total), a rinse cycle has still not been run, all three position L.E.D.’s will light continuously, and the hopper drives will be disabled until a rinse sequence has been run.

RUNNING A RINSE SEQUENCE

1. Place the Rinse/Run switch in the “rinse” position .

2. Sequentially or simultaneously at each of the three positions, press any of the three dispense switches. The dispenser will run for 10 seconds with the hopper(s) disabled.

3. As each position is rinsed, the corresponding L.E.D. will extinguish, indicating that the rinse cycle took place.

4. After all three position L.E.D.’s have extinguished, the rinse timer is reset.

5. Return the Rinse/Run switch to the “run” position.

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DISPENSER USE

1. Simply place a cup on the drip tray beneath the desired dispensing tip.

2. a) Momentarily press the appropriate dispense switch to froth and dispense the beverage. The dispenser will automatically dispense the beverage for the programmed dispense time at the programmed hopper dispense rate. The dispenser is factory preset to produce the approximate dispense sizes as follows:

Small (8 seconds): approximately 8 fluid ounces of beverage. Medium (12 seconds): approximately 12 fluid ounces of beverage. Large (16 seconds): approximately 16 fluid ounces of beverage. To stop a timed dispense, press the stop switch or any of the switches on the position that is running.

Note - The mixing chamber must drain at the end of each dispense.

The dispense times can be individually programmed by following the procedures described in Programming Modes.

b) Hot Water - Push and hold the hot water switch until the water reaches the desired level, then release.

HOPPER DISPENSE RATE OF PRODUCT

The hopper dispense rates are preset at the factory. With 22 tooth gear and auger wire, the preset dispense rate is approximately 3 to 5 grams per second. With 30 tooth gear and auger wire, the preset dispense rate is approximately 5 to 7 grams per second. The hopper dispense rates can be individually programmed to a range of dispense rates from approximately 1.5 to 12 grams per second by following the procedures described in Programming Modes.

PROGRAMMING MODES

1. Enter / Exit:

a. To enter the program mode, press any two dispense size switches, on the position to be programmed, at the

same time. The L.E.D. will flash indicating the program mode.

b. To exit the program mode, press a switch on any position other than the one being programmed. Note: The stop switch will not cause exit of program mode since it is used for some programming operations.

If in the program mode for more than 25 seconds and no switches have been pressed, the program mode is automatically exited.

2. Dispense Run Time:

a. Enter the program mode on the position you want to program (see step 1.a.) b. Place the “Rinse/Run” switch in the “Run” position and press and hold the cup size to be programmed. c. When the desired amount is reached, release the switch, the time is recorded in memory. To set the time to non-timed dispense, just momentarily press the position switch. This actually sets in a very short timed dispense. d. Repeat for remaining cup sizes if desired. e. Exit the programming mode (see step 1.b.)

3. Increasing / Decreasing the Hopper Dispense Rate:

a. Enter the program mode on the position you want to program (see step 1.a.) b. Place the Rinse/Run switch in the “Rinse” position. c. Press and hold down on the stop switch and press the small switch to decrease the dispense rate or press

the large switch to increase the dispense rate. Each time the button is pressed, the dispense rate will increase/ decrease by approximately 21/2 %. Each time the small or large switch is pressed, the L.E.D. on that position will flash on and off to indicate the switch was recognized. When the maximum or minimum level is reached all 3 position L.E.D.’s will flash rapidly.

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d. To return the dispense rate to the factory preset, press and hold down stop switch and press the medium

switch. When the medium switch is pressed, the L.E.D. on that position will flash on and off to indicate the

switch was recognized. e. Return the Rinse/Run switch to the “Run” position. f. Exit the programming mode (see step 1.b.)

4. Making Common Timed Dispenses: Once a position has been programmed to the proper dispense times, you

can make all 3 positions the same, as follows: a. Place the Rinse/Run switch in the “Run” position. b. Enter the program mode on the position you want all others to be like (see step 1.a.) c. Press and hold the Stop switch for 10 seconds. d. After the 10 second period, all 3 position L.E.D.’s will come on solid indicating the task is complete. The

program mode is exited when the Stop switch is released.

5. Running Hopper Throw Test: The hopper throw can be checked by automatically running the hopper motor

as follows: a. Remove the steam collector and mixing chamber from under the hopper to be checked. b. Position a small cup under the hopper outlet. c. Enter the program mode on the position you want to check (see step 1.a.) d. Place the Rinse/Run switch in the “Run” position. e. Press and hold the stop switch down and press the small, medium, or large switch. The hopper will run for

the programmed timed dispense period at the programmed dispense rate. f. Remove the cup and weigh the dispensed product. g. Exit the programming mode (see step 1.b.) h. Replace the mixing chamber and steam collector.

6. Making Common Dispense Rates: Once a position has been programmed to the proper hopper dispense rate,

you can make all 3 positions approximately the same, as follows: a. Place the Rinse/Run switch in the “Rinse” position. b. Enter the program mode on the position you want all others to be like (see step 1.a.) c. Press and hold the Stop switch for 10 seconds. d. After the 10 second period, all 3 position L.E.D.’s will come on solid indicating the task is complete. The

program mode is exited when the Stop switch is released. e. Return the Rinse/Run switch to the “Run” position.

7. Password: The password is to be used to prevent unauthorized entering of the program modes. The password

is preset at the factory to 0 (no password.) a. To enter the password programming, press and hold any two dispense size switches on any one of the positions

for 10 seconds. All 3 position L.E.D.’s will begin flashing indicating that the dispenser is ready to accept a new

password. b. When the switches are released the 3 L.E.D.’s will stop flashing. At this time press the Stop switch the number

of times that is the password (For example: If you press the Stop switch 5 times, you will then have to press

the Stop switch 5 times before you will be able to enter the program mode the next time.) c. 5 seconds after the Stop switch is pressed for the last time, the password is recorded in memory. As a

verification of the password, when the 5 seconds is up, the 3 L.E.D.’s will flash the password. (For example:

If the password is 5, when the exit of the password occurs, the L.E.D. will flash 5 times.) d. Thereafter, the Stop switch needs to be pressed the password number of times before the program mode can

be entered. NOTE: After 5 seconds of pressing the Stop switch for the final time, the password counter is reset to 0. So if the password is mis-entered, wait 5 seconds before trying again.

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e. To reset the password to 0 (no password,) enter the old password, then press and hold any two dispense size

switches on any one of the positions for 10 seconds. All 3 position L.E.D.’s will begin flashing indicating that the dispenser is ready to accept a new password. Then just wait 5 seconds without pressing the Stop switch.

NOTE: There will be no indication when the 5 seconds are up and the password is reset to 0.

RE-INITIALIZE TO FACTORY DEFAULTS

This resets all dispense time settings and hopper throw rates to the factory defaults, and resets the password to 0 (no password.)

1. Disconnect the dispenser from the power source.

2. Place the Rinse/Run switch in the “Run” position.

3. Press and hold the left small, center small, and the Stop switches at the same time.

4. While holding the switches, connect the dispenser to the power source (this is intended to be difficult.) The switches must be held for about 5 seconds. When the task is completed, the left, center and right L.E.D.’s flash until the switches are released.

5. Wait an additional 10 seconds before operating the dispenser.

COLD BEVERAGE SET-UP (OPTIONAL)

Cold beverages may be dispensed from the left dispense position. Simply place the HOT/COLD switch near the left whipper chamber in the “COLD” (upper) position.

CLEANING

Refer to the decal inside the hopper access door for cleaning recommendations and procedures. The use of a damp cloth rinsed in any mild, non-abrasive, liquid detergent is recommended for cleaning all surfaces on Bunn-O-Matic equipment.

ADJUSTMENTS

The hot or cold beverage solenoids are preset to dispense approximately 9/ be adjusted:

1. Disconnect the dispenser from the power source.

2. Remove the small left side access panel.

3. Rotate the control at the base of the desired solenoid(s) clockwise to decrease or counterclockwise to increase the amount of water.

4. For cold beverage adjustment remove the 1-1/2” plug on the lower left side of the dispenser and rotate the needle valve clockwise to decrease or counterclockwise to increase the amount of cold water.

ounce per second. This amount can

DRAINING THE HOT WATER TANK

CAUTION - The dispenser must be disconnected from the power source throughout these steps

1. Disconnect the dispenser from the power source.

2. Open front door and place tank heater switch in the “OFF” (upper) position.

3. Shut off and disconnect the incoming water supply.

4. Remove the top panel.

5. Gently remove one of the grommets from the tank lid.

6. Insert a tube to the bottom of the tank and syphon ALL of the water out.

NOTE - The dispenser must be refilled using the INITIAL FILL & HEAT steps before reconnecting to the power source.

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TROUBLESHOOTING

A troubleshooting guide is provided to suggest probable causes and remedies for the most likely problems encountered. If the problem remains after exhausting the troubleshooting steps, contact the Bunn-O-Matic Technical Service Department.

• Inspection, testing, and repair of electrical equipment should be performed only by qualified service personnel.

• All electronic components have 120 volt, 230 volt or 240 volt ac and low voltage dc potential on their terminals.

Shorting of terminals or the application of external voltages may result in board failure.

• Intermittent operation of electronic circuit boards is unlikely. Board failure will normally be permanent. If an

intermittent condition is encountered, the cause will likely be a switch contact or a loose connection at a

terminal or crimp.

• Solenoid removal requires interrupting the water supply to the valve. Damage may result if solenoids are

energized for more than ten minutes without a supply of water.

• The use of two wrenches is recommended whenever plumbing fittings are tightened or loosened. This will help

to avoid twists and kinks in the tubing.

• Make certain that all plumbing connections are sealed and electrical connections tight and isolated.

• This unit is heated at all times. Keep away from combustibles.

WARNING – • Exercise extreme caution when servicing electrical equipment.

• Unplug the dispenser when servicing, except when electrical tests are specified.

• Follow recommended service procedures

• Replace all protective shields or safety notices

PROBLEM

Product will not dispense

PROBABLE CAUSE

1. No water

2. No power or incorrect voltage to the dispenser

REMEDY

Water lines and valves to the dispenser must be open.

(A1) Check for 120 volts across the black and white wires on two wire 120 volt dispensers. (A2) Check for 120 volts across the red and white wires and the black and white wires, 208 volts across the red and black wires on three wire 120/208 volt dispensers and 240 volts across the red and black wires on 120/240 volt dispensers. (A3) Check for 240 volts across the white and black wires on two wire 240 volt dispenser. (A4) Check for 230 volts across the white and black wires on two wire 230 volt dispensers.

3. Digital Touch Control Switch

(B) Check circuit breakers or fuses.

Refer to

Service

- Digital Touch Control Switch for testing procedure. See page 26

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TROUBLESHOOTING (cont.)

PROBLEM

Product will not dispense (cont.)

PROBABLE CAUSE

4. Dispense Solenoid Valve (Hot or Cold)

5. Solenoid Valve (Inlet)

6. Control Board

7. Overflow Protection Switch

8. Auger Drive

REMEDY

Refer to

Service

- Dispense Solenoid Valve for testing procedures. See page 35 or 36

Refer to

Service

- Solenoid Valve (Inlet) for testing procedures. See page 38

Refer to

Service

- Control Board and Probe for testing procedures. See page 22

Refer to

Service

- Overflow Protection Switch for testing procedures. See page 33

Refer to

Service

- Auger Drive.

See page 15

9. Water Strainer

10. Lime build-up CAUTION - Tank and tank components should be delimed regularly depending on local water conditions. Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks.

11. Rinse cycle not run for 12 hours.

12. Transformer

(A) Direction of flow arrow must be pointing towards dispenser.

(B) Remove the strainer and check for obstructions. Clear or replace.

Inspect the tank assembly for excessive lime deposits. Delime as required.

Refer to

Operations

- Rinse

Timer. See page 5

Refer to

Service

- Transformer for test procedures. See page 41

Water is not hot

1. Limit Thermostat CAUTION - Do not eliminate or bypass limit thermostat. Use only BOM replacement part #29329.1000

Refer to

Service

- Limit Thermostat for testing procedures. See page 33

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TROUBLESHOOTING (cont.) PROBLEM

Water is not hot (cont.)

PROBABLE CAUSE

2. Control Thermostat

REMEDY

Refer to

Service

- Control Thermostat for testing procedures. See page 24

Spitting or excessive steaming

Dripping from dispense tip

3. Tank Heater

4. Tank Heater Switch

1. Lime build-up CAUTION - Tank and tank components should be delimed regularly depending on local water conditions. Excessive mineral build-up on stainless steel surfaces can initiate corrosive reactions resulting in serious leaks.

2. Control Thermostat

Refer to

Service

- Tank Heater for testing procedures. See page 39

Refer to

Service

- Tank Heater Switch for testing procedures. See page 40

Inspect tank assembly for excessive lime deposits. Delime as required.

Refer to

Service

- Control Thermostat for testing procedures. See page 24

Inspect the tank assembly for excessive lime deposits. Delime as required.

Water flows into tank continuously

2. Dispense Solenoid Valve (Hot or Cold)

1. Control Board

2. Solenoid Valve (Inlet)

Remove the dispense solenoid valve and clear any obstructions. Rebuild or replace the valve if necessary. See page 35 or 36

Refer to

Service -

Control Board and Probe for testing procedures. See page 22

Refer to

Service

- Solenoid Valve (Inlet) for testing procedures. See page 38

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TROUBLESHOOTING (cont.) PROBLEM PROBABLE CAUSE

REMEDY

Water flows into tank continuously (cont.)

Product overflows container

Weak product

3. Overflow Protection Switch

1. Digital Touch Control Switch

2. Dispense Solenoid Valve (Hot or Cold)

3. Dispense time excessive

1. Water temperature

Refer to

Service

- Overflow Protection Switch for testing procedures. See page 33

Refer to

Service -

Digital Touch Control Switch for testing procedures. See page 26

Remove the solenoid valve and clear any obstructions. Rebuild or replace the valve if necessary. See page 35 or 36

Refer to

Dispense Run Time

page 6

Place an empty container beneath the dispense tip. Initiate a dispense cycle and check the water temperature immediately below the dispense tip with a thermometer. (A) Reading for mechanical thermostat models should be 180°F to 200°F (see thermostat temperature settings decal in

USER NOTICES

on page 3. (B) Reading for electronic thermostat should be 185°F to 190°F. Adjust the control thermostat to increase or decrease the water temperature. Replace if necessary.

2. Whipper Motor

3. Frother

4. Dispense Solenoid Valve (Hot or Cold)

5. Auger Drive

6. Auger Spring

Refer to

Service

- Whipper Motor for

testing procedure. See page 28

Refer to

Service

- Frother Compo-

nents. See page 28

Refer to

Service

- Dispense Solenoid Valve for test procedures. See page 35 or 36

Refer to

Service

- Auger Drive Com-

ponents. See page 15

Refer to

Service

- Auger Drive Com-

ponents. See page 15

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TROUBLESHOOTING (cont.) PROBLEM

PROBABLE CAUSE

REMEDY

Weak product (cont.)

Dispenser is making unusual noises

7. Auger Motor

8. Rinse/Run Switch

9. Rinse Timer

1. Plumbing Lines

2. Water Supply

Refer to

Service

- Auger Drive Com-

ponents. See page 15

Refer to

Service -

Rinse/Run Switch

for test procedures. See page 34

Refer to

Operations

- Rinse Timer.

See page 5

Plumbing lines should not be resting on the counter top.

(A) The dispenser must be connected to a cold water line

(B) Water pressure to the dispenser must not exceed 90 psi. Install a regulator if necessary to lower the working pressure to approximately 50 psi.

Excess dust

Display not lit

3. Tank Heater

1. Fan

2. Control Board

1. Lamp

2. Lamp Holder

3. Starter - Lamp

4. Ballast

Remove and clean lime off the tank heater. See page 39

Refer to

Service

- Fan for testing

procedures. See page 28

Refer to

Service

- Control Board for testing procedures. See page 22

Refer to

Service

- Lamp, see page 32 for lamp replacement.

Refer to

Service

- Lamp Holder for testing procedures. See page 31

Refer to

Service

- Starter for testing procedures. See page 32

Refer to

Service

- Ballast for testing procedures. See page 21

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TROUBLESHOOTING (cont.)

PROBLEM

Hot water will not dispense

Ready lamp will not light

PROBABLE CAUSE

1. Dispense solenoid valve

2. Digital touch control switch

3. Auxiliary control board

1. Tank heater switch

2. Control thermostat

REMEDY

Refer to

Service -

Dispense solenoid valve for testing procedures. See page 37

Refer to

Service -

Digital touch control switch for testing procedures. See page 26

Refer to

Service -

Auxiliary control board for testing procedures. See page 19

Refer to

Service -

Tank heater switch

for testing procedures. See page 40

Refer to

Service -

Control thermostat for testing procedures. See page 24

Ready lamp lights constantly

3. Digital touch control switch

4. Auxiliary control board

1. Control thermostat

2. Auxiliary control board

Refer to

Service -

Digital touch control switch for testing procedures. See page 26

Refer to

Service -

Auxiliary control board for testing procedures. See page 19

Refer to

Service -

Control thermostat for testing procedures. See page 24

Refer to

Service -

Auxiliary control board for testing procedures. See page 19

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+ 32 hidden pages