Henny Penny HC-4 User manual

SERVICE
M A N U A L
HEATED HOLDING CABINET
MODEL
HC - 4
HC - 5
HC - 15
REGISTER WARRANTY ONLINE AT WWW.HENNYPENN Y.COM

TABLE OF CONTENTS
Models HC-4, HC-5, HC-15
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. Operating Controls Countdown Timers (CDT)................................................ 2-13
2-16. Replace LED Strip.............................................................................................2-18
2- 17. Wiring Diagrams ...............................................................................................2-19
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
FM06-116A i
Revised 9-1-20

1-1
1-1. INTRODUCTION This section provides troubleshooting information in the form of
an easy to read list.
If a problem occurs during the first 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 define 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.
SECTION 1. TROUBLESHOOTING

1-2
1-3. TROUBLESHOOTING (Continued)
PROBLEM CAUSE CORRECTION
OPERATION
A. Product not
holding
temperature
• Doors are left open • Keep doors closed except to
load and unload product
• Increase thermostat setting by moving
the knob to a higher number setting
• Replace gasket per Door Gasket
Replacement Section
• Check heater; replace per Heater
Section
• Check blower; replace per Blower
Section
• Hold product only for recommended
time
• Using meter, compare receptacle
voltage to data plate voltage
• Thermostat set too low
• Gasket torn or worn
• Heater not working
• Blower not working
• Product held too long
• Low or improper voltage
B. Cabinet
steaming -
product
becoming
soggy
• Too much humidity inside the cabinet
• Holding product too long
• Vent not set properly (units
with vent adjustment only)
• Empty water from the water pan
• Hold product for recommended time
• Adjust vent per Operator’s Manual
C. Product dry
• No water in pan
• Remove pan and put in approximately
1” of hot water
HEATING SYSTEM
A. Unit will
not heat
• Faulty thermostat
• Check thermostat per Thermostat
Section
• Check high limit per High Limit
Section
• Check heater; replace per Heater
Section
• Check wiring for loose connections
or broken wires and repair as needed
• Faulty high limit
• Faulty heater
• Faulty wiring

1-3
1-3. TROUBLESHOOTING (Continued)
PROBLEM CAUSE CORRECTION
HEATING SYSTEM (Continued)
B. Unit will not heat
to desired temp-
erature
C. Unit overheating
• Faulty blower
• Thermometer not indicating
true temperature
• One of heaters defective
• Doors being left open too much
• Gaskets torn or worn
• Defective high limit on one of heaters
• Check blower; replace per Blower
Section
• Check cabinet temperature with
another thermometer; if necessary,
replace per Thermometer Section
• Check heater; replace per Heater
Section
• Only open doors as necessary
• Replace gasket per Door Gasket
Replacement Section
• Check high limit; replace per High
Limit Section
• Faulty thermostat
• Faulty blower
• Check thermostat; replace per
Thermostat Section
• Check blowers; replace per Blower
Section
VENTILATING SYSTEM
A. Both blowers
not working
• Faulty blowers
• Faulty fuse (if equipped)
• Check blowers; replace per Blower
Section
• Check fuse; replace per Fuse Section

2-1
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 deter-
mining 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
infinite resistance.
A continuity tester cannot be used to check coils.
2-3. REMOVAL OF THE
MODULE ACCESS
PANEL
2-4. MODULE REMOVAL
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.
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.
SECTION 2. MAINTENANCE

2-2
2-5. REMOVAL OF
MODULE HOUSING
Step 2
Step 3
If the need for extensive service is required on the module compo-
nents, 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

2-3
2-6. FUSE
Step 2
Step 3
Step 4
All units are not equipped with fuses.
If both blowers quit working at the same time:
1. Remove electrical power supplied 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 cap from the fuse holder by turning it counter-
clockwise. (Located above the power cord.)
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.

4-2
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 fol-
lowing instructions in this section.
Step 4
4. Loosen the nut holding the switch on the back side of the con-
trol panel and then remove the nut on the front of the control
panel.
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.

2-5
2-8. THERMOSTAT
Step 5
Step 7
Step 8
Step 11
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 thermo-
stat 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.
5. Remove the four (4) nuts that hold the blower box to the cabi-
net.
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.

6-2
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.
18. Reconnect the electrical supply to the cabinet.
2-9. INDICATING LIGHTS
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.

2-7
2-9. INDICATING LIGHTS
(Continued)
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 con-
trol 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.
2-10. THERMOMETER
Step 4
Step 4
Step 6
Step 7
8. Reconnect the electrical supply to the cabinet.
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 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.
10. Reposition the blower box and secure it with the four (4)
nuts previously removed.

8-2
2-10. THERMOMETER
(Continued)
Step 8
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.
11. Reseal the notches in the blower box corners with silicone
rubber sealant.
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.
2-11. HEATER
Step 3
Step 5
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.
4. Remove the wires attached to the two (2) heater terminals.
5. Remove the two (2) screws holding the heater to the module.

2-9
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.
Step 5
This section should be followed when replacing either of the
two (2) high limits in the cabinet. If there is a heating prob-
lem in the cabinet, both high limits should be tested.
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.

10-2
2-12. HIGH LIMIT
(Continued)
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.
2-13. BLOWER
Step 3
Step 4
Procedures for blower motor replacement are the same on
both blowers.
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 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, con-
tinue onto step 7.

2-11
2-13. BLOWER
(Continued)
Step 7
Step 8
The blower motor can be ordered as an assembly. This will
include the motor, the fan, and the wheel. Normally, just
the motor would need replacing if found to be defective. If
you are just replacing the motor, continue with the following
procedures.
7. The fan can be pulled off the shaft of the motor.
8. With a 5/64” Allen wrench, loosen the set screw that holds
the blower wheel to the motor shaft and remove the wheel.
9. Remove the four (4) screws that hold the blower cover to the
motor.
10. Install a new blower motor in reverse order.
11. Be sure to put the spacers back between the blower cover and
the motor.
When replacing a blower motor, be sure that the motor coil is
positioned away from the heater when reinstalling.
12. Reconnect the two wires to the new blower by stripping the
wire ends and fastening with wire nuts.
13. Replace the access panel to the module.
14. Reconnect the electrical supply to the cabinet.

12-2
2-14. DOOR GASKET
REPLACEMENT
Steps 1 & 2
1. Pull the gasket to the side to expose the screws that hold the
retainer to the cabinet.
2. Loosen the screws around the full outside perimeter of the
gasket.
3. With the screws loose, the gasket should slide out from under
the retainer.
4. Remove the gasket and replace with a new one by reversing
the above procedures.