Henny Penny HHC-902, HHC-903, HHC-906, HHC-908 Service Manual

Henny Penny

Heated Holding Cabinet

Model HHC-900 Model HHC-902 Model HHC-903 Model HHC-906 Model HHC-908

Model HC-15

TECHNICAL MANUAL

Models HHC-90X/HC-15

TABLE OF CONTENTS

Section Page

Section 1. TROUBLESHOOTING ............................................................................................. 1-1

1-1. Introduction ...................................................................................................... 1-1

1-2. Safety ............................................................................................................... 1-1

1-3. Troubleshooting ............................................................................................... 1-1

Section 2. MAINTENANCE ...................................................................................................... 2-1

2-1. Introduction ...................................................................................................... 2-1

2-2. Test Instruments ............................................................................................... 2-1

2-3. Removal of Module Access Panel ................................................................... 2-1

2-4. Module Removal .............................................................................................. 2-1

2-5. Removal of Module Housing .......................................................................... 2-2

2-6. Fuse .................................................................................................................. 2-3

2-7. Power Switch ................................................................................................... 2-4

2-8. Thermostat ....................................................................................................... 2-5

2-9. Indicating Lights .............................................................................................. 2-6

2-10. Thermometer .................................................................................................... 2-7

2-11. Heater ............................................................................................................... 2-8

2-12. High Limit ....................................................................................................... 2-9

2-13. Blower ............................................................................................................. 2-10

2-14. Door Gasket Replacement ............................................................................... 2-12

2-15. Wiring Diagrams ............................................................................................. 2-13

Section 3. PARTS INFORMATION ........................................................................................... 3-1

3-1. Introduction ...................................................................................................... 3-1

3-2. Genuine Parts ................................................................................................... 3-1

3-3. How to Find Parts ............................................................................................ 3-1

3-4. How to Order ................................................................................................... 3-1

3-5. Prices ................................................................................................................ 3-2

3-6. Delivery ............................................................................................................ 3-2

3-7. Warranty ........................................................................................................... 3-2

3-8. Recommended Spare Parts for Distributors ..................................................... 3-2

106 FM06-021 i

Revised 5-28-10

Models HHC-90X/HC-15

SECTION 1. TROUBLESHOOTING

1-1. INTRODUCTION

This section provides troubleshooting information in the form of an easy to read list.

If a problem occurs during the ﬁ rst operation of a new cabinet, recheck the Installation Section of the Operator’s Manual.

Before troubleshooting, always recheck the Operation Section of the Operator’s Manual.

1-2. SAFETY Where information is of particular importance or is safety related,

the words NOTICE, CAUTION, or WARNING are used. Their usage is described below.

SAFETY ALERT SYMBOL is used with DANGER, WARNING, or CAUTION which indicates a personal injury type hazard.

NOTICE is used to highlight especially important information.

CAUTION used without the safety alert symbol indicates

a potentially hazardous situation which, if not avoided, may result in property damage.

CAUTION used with the safety alert symbol indicates a

potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

The word WARNING is used to alert you to a procedure, that if not performed properly, might cause personal injury.

1-3. TROUBLESHOOTING To isolate a malfunction proceed as follows:

1. Clearly deﬁ ne the problem or symptom and when it occurs.

2. Locate the problem in the troubleshooting table.

3. Review all possible causes, then one at a time work through the list of corrections until the problem is solved.

If maintenance procedures are not followed correctly, injuries and/or property damage could result.

203 1-1

Models HHC-90X/HC-15

1-3. TROUBLESHOOTING (Continued) PROBLEM CAUSE CORRECTION

OPERATION

A. Product not • Doors are left open • Keep doors closed except to holding load and unload product temperature

• Thermostat set too low • Increase thermostat setting by moving the knob to a higher number setting

• Gasket torn or worn • Replace gasket per Door Gasket Replacement Section

• Heater not working • Check heater; replace per Heater Section

• Blower not working • Check blower; replace per Blower Section

• Product held too long • Hold product only for recommended time

• Low or improper voltage • Using meter, compare receptacle voltage to data plate voltage

B. Cabinet • Too much humidity inside the cabinet • Empty water from the water pan steaming - product • Holding product too long • Hold product for recommended time becoming soggy • Vent not set properly (units • Adjust vent per Operator’s Manual with vent adjustment only)

C. Product dry • No water in pan • Remove pan and put in approximately 1” of hot water

HEATING SYSTEM

A. Unit will • Faulty thermostat • Check thermostat per Thermostat not heat Section

• Faulty high limit • Check high limit per High Limit Section

• Faulty heater • Check heater; replace per Heater Section

• Faulty wiring • Check wiring for loose connections or broken wires and repair as needed

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Models HHC-90X/HC-15

1-3. TROUBLESHOOTING (Continued) PROBLEM CAUSE CORRECTION

HEATING SYSTEM (Continued)

B. Unit will not heat • Faulty blower • Check blower; replace per Blower to desired temp- Section erature

• Thermometer not indicating • Check cabinet temperature with true temperature another thermometer; if necessary, replace per Thermometer Section

• One of heaters defective • Check heater; replace per Heater Section

• Doors being left open too much • Only open doors as necessary

• Gaskets torn or worn • Replace gasket per Door Gasket Replacement Section

• Defective high limit on one of heaters • Check high limit; replace per High Limit Section

C. Unit overheating • Faulty thermostat • Check thermostat; replace per Thermostat Section

• Faulty blower • Check blowers; replace per Blower Section

VENTILATING SYSTEM

A. Both blowers • Faulty blowers • Check blowers; replace per Blower not working Section

• Faulty fuse (if equipped) • Check fuse; replace per Fuse Section

203 1-3

Models HHC-90X/HC-15

SECTION 2. MAINTENANCE

2-1. INTRODUCTION

This section provides procedures for the testing and replacement of the various parts used within the cabinet. Before replacing any parts, refer to the Troubleshooting Section. It will aid you in determining the cause of the malfunction.

2-2. TEST INSTRUMENTS You may use two test instruments to check the electric

components.

1. A continuity light

2. An ohmmeter

When the manual refers to the circuit being closed, the continuity light illuminates or the ohmmeter reads zero unless otherwise noted. When the manual refers to the circuit being open, the continuity light will not illuminate or the ohmmeter will read 1 (one) or inﬁ nite resistance.

A continuity tester cannot be used to check coils.

2-3. REMOVAL OF THE MODULE ACCESS PANEL

In most procedures of the maintenance section, the access panel must be removed from the top of the module. This access panel can easily be removed by taking out the four screws that fasten it to the module shell.

2-4. MODULE REMOVAL

If the component module of the cabinet has to be removed, be sure to remove the four screws (one at each corner) before lifting it from the unit. Also, when work has been completed on the module, be sure to relocate it properly and reinstall the screws that fasten the module to the cabinet. Failure to do so might cause the unit to perform inadequately.

203 2-1

Models HHC-90X/HC-15

2-5. REMOVAL OF MODULE HOUSING

Step 2

Step 3

If the need for extensive service is required on the module components, the entire outer shell of the module can be removed to make servicing easier. To remove the outer shell of the module, follow these procedures:

1. Remove the module from the cabinet per Module Removal Section.

2. Remove the six (6) screws that are located on the sides of the

module.

3. Remove the four (4) screws located at the corners of the

module top.

4. Remove the screws from the control panel and the back

panel, that fasten them to the module housing.

5. Lift the shell of the module off the unit.

6. When work is completed, reassemble in reverse order.

Step 4

Step 5

2-2 803

2-6. FUSE

Models HHC-90X/HC-15

All units are not equipped with fuses.

If both blowers quit working at the same time:

1. Remove electrical power supplied to the cabinet.

Step 2

To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle.

2. Remove the cap from the fuse holder by turning it counterclockwise. (Located above the power cord.)

Step 3

Step 4

3. Pull the fuse from the holder.

4. Check the fuse for defectiveness by putting both leads of the ohmmeter or continuity light on opposite ends of the fuse. The fuse should be closed, or read no resistance. If the fuse is found to be defective, replace it with a new one. Be sure to use an identical fuse as the one being replaced.

5. Replace the cap to the fuse holder.

6. Reconnect the electrical supply to the cabinet.

203 2-3

Models HHC-90X/HC-15

2-7. POWER SWITCH

Step 3

1. Disconnect the electrical supply to the cabinet.

To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle.

2. Remove the four (4) screws from the control panel and pull it down.

3. Remove all wires from the switch. Check across the two terminals of the switch for continuity. With the switch in the ON position, the circuit should be closed. With the switch in the OFF position, the circuit should be open. If the switch is found to be defective, replace it by continuing with the following instructions in this section.

4. Loosen the nut holding the switch on the back side of the control panel and then remove the nut on the front of the control panel.

Step 4

5. Remove the switch.

6. Install a new switch in reverse order.

7. Reconnect the wires to the switch on the same terminals that they were previously on.

8. Push the control panel back in place and put in screws.

9. Reconnect the electrical supply to the cabinet.

2-4 803

Models HHC-90X/HC-15

2-8. THERMOSTAT

Step 5

1. Disconnect the electrical supply to the cabinet.

To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle.

2. Remove the access panel from the top of the module.

3. Remove the four (4) screws from the control panel and pull it down.

4. Remove the wires from the thermostat. With the thermostat set at the maximum setting (all the way clockwise), the circuit should be closed. With the thermostat in the 0, or OFF, position (all the way counterclockwise), the circuit should be open. If the thermostat is found to be defective, replace it by continuing with the following instructions in this section.

Step 7

Step 8

Step 11

5. Remove the four (4) nuts that hold the blower box to the cabinet.

6. Lift the blower box up to expose the thermometer and thermostat bulbs.

7. While holding the blower box, remove the two (2) nuts that secure the bulb retaining clamps and remove the thermostat bulb from the clamps.

8. Using a 5/64” Allen wrench, loosen the two (2) set screws in the thermostat knob and remove the knob.

9. Remove the two (2) nuts that hold the thermostat bracket to the control panel.

10. Remove the thermostat shaft extension with a 1/16” Allen wrench.

11. Remove the two (2) screws that hold the thermostat to the bracket.

12. Remove the thermostat from the unit.

203 2-5

Models HHC-90X/HC-15

2-8. THERMOSTAT (Continued)

13. Install a new thermostat in reverse order.

14. Reposition the blower box and secure it with the four (4) nuts previously removed.

Be sure that both the thermometer and thermostat capillary tubes pass through the notches in the front corners of the blower box. Failure to do so could permanently damage the thermometer or thermostat and cause improper operation of the cabinet.

15. Reseal the notches in the blower box corners with silicone rubber sealant.

16. Push the control panel back in place and put in screws.

17. Replace the access panel to the module.

2-9. INDICATING LIGHTS

18. Reconnect the electrical supply to the cabinet.

This section should be followed when replacing either of the two (2) indicating lights in the control panel.

1. Disconnect the electrical supply to the cabinet.

To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle.

2. Remove the four (4) screws from the control panel and pull it down.

3. Cut the light wires just behind the body of the light.

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Models HHC-90X/HC-15

2-9. INDICATING LIGHTS (Continued)

2-10. THERMOMETER

4. Remove the light by squeezing the retainers on the body and pushing the light out through the control panel.

5. Install a new light by pushing it through the front of the control panel until it snaps securely in place.

6. Strip the ends of the cut wires and connect them to the new light with wire nuts.

7. Push the control panel back in place and put in screws.

8. Reconnect the electrical supply to the cabinet.

Step 4

1. Disconnect the electrical supply to the cabinet.

To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle.

Step 4

Step 6

2. Remove the access panel from the top of the module.

3. Remove the four (4) screws from the control panel and pull

it down.

4. Remove the four (4) nuts that hold the blower box to the

cabinet.

5. Lift the blower box up to expose thermometer and thermostat bulbs.

6. While holding the blower box, remove the two nuts that secure the bulb retaining clamps and remove the thermometer bulb from the clamps.

7. Remove the two (2) nuts that hold the mounting brackets

on the back of the thermometer body.

8. Remove the thermometer by pulling the body and capillary tube through the control panel.

9. Install a new thermometer in reverse order.

Step 7

10. Reposition the blower box and secure it with the four (4)

nuts previously removed.

203 2-7

2-10. THERMOMETER (Continued)

Models HHC-90X/HC-15

11. Reseal the notches in the blower box corners with silicone rubber sealant.

2-11. HEATER

Step 8

Step 3

12. Replace the access panel to the top of the module.

13. Push the control panel back in place and put in screws.

14. Reconnect the electrical supply to the cabinet.

This section should be followed when replacing either of the two (2) heaters in the cabinet. If there is a heating problem, both heaters should be checked.

1. Disconnect the electrical supply to the cabinet.

To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle.

2. Remove the access panel from the top of the cabinet.

3. Remove the two (2) screws holding the high limit to the heater.

Step 5

4. Remove the wires attached to the two (2) heater terminals.

5. Remove the two (2) screws holding the heater to the module.

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Models HHC-90X/HC-15

2-11. HEATER (Continued)

2-12. HIGH LIMIT

Step 6

6. Remove the heater.

7. Install a new beater in reverse order.

If you have a 240V, 3,000 W unit, you must install the new heater so that the coils are spread furthest apart where air from the blower enters the heater.

8. Reattach the heater wires.

9. Refasten the high limit to the new heater.

10. Replace the access panel to the module.

11. Reconnect the electrical supply to the cabinet.

This section should be followed when replacing either of the two (2) high limits in the cabinet. If there is a heating problem in the cabinet, both high limits should be tested.

Step 5

1. Disconnect the electrical supply to the cabinet.

To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle.

2. Remove the access panel from the top of the cabinet.

3. Remove the wires attached to the high limit.

4. Check across high limit terminals for continuity. As long as cabinet temperature is below 210°F and blower has been operating properly, high limit should be closed, or read no resistance. If high limit is found to be defective, replace it by continuing with the following instructions.

5. Remove two (2) screws that hold high limit to the heater.

203 2-9

Models HHC-90X/HC-15

2-12. HIGH LIMIT (Continued)

2-13. BLOWER

6. Remove the high limit.

7. Install a new high limit in reverse order.

8. Reconnect the two wires to the high limit.

9. Replace the access panel to the module.

10. Reconnect the electrical supply to the cabinet.

Procedures for blower motor replacement are the same on both blowers.

1. Disconnect the electrical supply to the cabinet.

Step 3

Step 4

To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker, or unplug cord at wall receptacle.

2. Remove the access panel from the top of the cabinet.

3. Remove the three (3) screws that fasten the blower motor to the blower housing.

4. Cut the two (2) blower wires approximately 2” away from the blower.

5. Lift the blower motor and wheel out of the blower housing.

6. If replacing motor, fan, and wheel as an assembly, install new assembly in reverse order. If replacing just the motor, continue onto step 7.

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