Henny Penny HCH-930 User manual

TECHNICAL MANUAL
Henny Penny
Heated Holding Cabinet
Model HCH-930
Model HCH-932

Model HCH-930/932
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. Maintenance Hints ...................................................................................................... 2-1
2-3. Deliming Water Pan and Baffles................................................................................. 2-1
2-4. Clean Water Strainer ................................................................................................... 2-2
2-5. Replace Water Strainer ............................................................................................... 2-2
2-6. Cleaning Water Valve .................................................................................................. 2-3
2-7. Replacing Water Valve ................................................................................................ 2-4
2-8. Float Switch ................................................................................................................. 2-5
2-9. Solid State Delay Timer ............................................................................................... 2-6
2-10. Blower ......................................................................................................................... 2-6
2-11. Heater ......................................................................................................................... 2-7
2-12. High Limit .................................................................................................................... 2-7
2-13. Thermometer ............................................................................................................... 2-8
2-14. Thermostat .................................................................................................................. 2-9
2-15. Power Switch .............................................................................................................. 2-10
2-16. Indicating Lights .......................................................................................................... 2-10
2-17. Fan ............................................................................................................................... 2-11
2-18. Drawer Gasket ............................................................................................................ 2-11
2-19. Drawer and Liner Bearing Replacement .................................................................... 2-12
2-20. Wiring Diagrams .......................................................................................................... 2-13
206 i
FM06-019
Revised 11-30-20

ii 703

Model HCH-930/932
1-1. INTRODUCTION This section provides troubleshooting information in the form of an
easy to read table.
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 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 problem is solved.
If maintenance procedures are not followed correctly,
injuries and/or property damage could result.
203 1-1
SECTION 1. TROUBLESHOOTING

Model HCH-930/932
1-3. TROUBLESHOOTING (Continued)
Problem Cause Correction
OPERATION
A. Product not • Drawers left open • Keep drawers closed except
holding temperature to load and serve product
• Product held too long • Hold product only for recom-
mended times
• Thermostat set too low • Increase thermostat setting by
removing the hole plug on control
panel and turning thermostat shaft
clockwise with a screw driver
• Heater not working • Check heater and replace if bad
• Blower not working • Check blower and replace if bad
B. Cabinet steaming • Too much humidity inside • Remove one or more baffles
or product soggy cabinet from water pan
WATER SYSTEM
A. Water pan not filling • Water supply off, or • Check water supply line
disconnected
• Plugged water strainer • Clean water strainer
• Corroded water pan • Clean water pan
• Faulty or corroded water valve • Clean water valve, or replace if
necessary
• Faulty solid state timer • Replace solid state timer
B. Water pan overflows • Water pan not installed, or • Check water pan installation
installed improperly
• Corroded water pan • Clean water pan
• Faulty or corroded water valve • Clean water valve or replace if bad
• Faulty float switch • Check float switch
• Faulty solid state timer • Replace solid state timer
1-2 203

Model HCH-930/932
1-3. TROUBLESHOOTING (Continued)
Problem Cause Correction
HEATING SYSTEM
A. Unit not heating • Faulty thermostat • Check thermostat
• Faulty high limit • Check high limit
• Faulty heater • Check heater
• Faulty wiring • Check wiring for loose connections
or broken wires
B. Unit not heating • Faulty blower • Check blower and replace if bad
to desired temperature
• Thermometer not indicating • Check cabinet temperature with
true temperature another thermometer; if necessary,
replace thermometer
C. Unit overheats • Faulty thermostat • Check thermostat
• Faulty blower • Check blower and replace if bad
POWER SECTION
A. With power switch • Unit not connected to electrical • Connect unit to electrical supply
turned on, the cabinet supply
is inoperative
• Open circuit breaker or fuse • Reset circuit breaker, or replace
fuse
• Faulty cord or plug • Check cord and plug
• Faulty power switch • Check power switch
B. With power switch • Open high limit • With unit cool, check high limit
turned on, the blower
and fan operate, but • If the high limit opened because of
the power light is overheating, refer back to part C
off, and the unit of the Heating System trouble-
won’t heat shooting
203 1-3

Model HCH-930/932
THIS
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INTENTIONALLY
LEFT
BLANK.
1-4 703

Model HCH-930/932
2-1. INTRODUCTION This section provides procedures for the checkout and replacement
of the various parts used in the cabinet. Before replacing any parts,
refer to the Troubleshooting section. It will aid you in determining the
cause of the malfunction.
2-2. MAINTENANCE HINTS 1. You may want to use a multimeter to check the electric
components.
2. When the manual refers to the circuit being closed, the
multimeter should read zero unless otherwise noted.
3. When the manual refers to the circuit being open, the multimeter
will read infinity.
2-3. DELIMING WATER PAN Inspect the water pan and baffles every 10 days for lime buildup,
AND BAFFLES and clean when necessary.
Failure to keep the water pan and baffles free of lime
buildup reduces the performance of the cabinet.
1. Disconnect the electrical supply to the cabinet.
Failure to disconnect power to the cabinet causes the
interior of the cabinet to be “flooded” with water from
the automatic water fill system.
2. Remove the top drawer from the cabinet.
3. Remove the water pan and baffles by supporting the pan with one
hand and pulling out on the latches with the other hand. The
water pan drops down from the ceiling.
4. Remove the 4 baffles from the water pan.
Step 3
705 2-1
SECTION 2. MAINTENANCE

Model HCH-930/932
2-3. DELIMING WATER PAN 5. Clean the baffles and water pan with a brush, or other tool, to
AND BAFFLES (Continued) loosen and remove any buildup. If the buildup is excessive, a
liquid chemical lime remover may help to remove lime.
Do not use steel wool, other abrasive cleaners or
cleaners/sanitizers containing chlorine, bromine, iodine or
ammonia chemicals, as these will deteriorate the stainless
steel material and shorten the life of the pan and baffles.
6. After removing all lime buildup, rinse pan and baffles, and place
water pan and baffles back into cabinet. Make sure water pan
is secure against the ceiling of the cabinet.
7. Replace the top drawer.
8. Reconnect electrical supply to cabinet.
2-4. CLEAN WATER STRAINER 1. Shut off water supply.
2. Remove the hex cap at the bottom of the strainer.
3. Remove the screen from the strainer and clean it. If strainer has a
lime buildup, lime remover can be used.
4. Reassemble in reverse order.
5. Turn on water supply and check for leaks.
Step 2
2-5. REPLACE WATER STRAINER 1. Shut off water supply.
2. Disconnect water supply tubing.
3. Remove the water strainer, along with the fittings on both ends.
4. Transfer the two fittings from the old strainer to the new one.
Pipe sealant is needed on all threaded fittings.
5. Install the new strainer on cabinet.
6. Reconnect the water supply tubing.
7. Turn on water supply and check for leaks.
2-2 203

Model HCH-930/932
2-6. CLEANING WATER VALVE 1. Disconnect electrical supply to unit.
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. Shut off water supply.
3. Disconnect the water supply tubing from the water strainer.
4. Remove the cabinet top.
5. Label wires then remove the wires from water valve.
6. Disconnect the water tubing from the outlet side of water valve.
7. Loosen large nut holding the fittings on the inside, back wall of the
cabinet.
8. Pivot the water valve against the side wall of the cabinet. Hold
the brass fitting on the inlet side of the valve with a wrench, and
then turn valve counterclockwise until the valve is free from the
fitting.
9. Remove the 2 screws (H) from the coil retainer (F).
10. Remove the retainer and pull the coil (A) off of the valve to
expose the stem.
11. Remove the stem by carefully pulling upward. The plunger (C),
spring (D), and seat (E), are now exposed.
12. Remove the plunger, spring, and seat, and check the rubber seat
for dirt.
13. Clean the valve body (G) and the rubber seat if necessary by
flushing them with clean water. Let water run both ways through
the body to flush any dirt from the valve.
14. Carefully place the seat, spring, and plunger back into the valve
body. Be sure the large diameter of the spring is pointed up.
15. Place the stem over the plunger and lightly press the stem seal into
place.
Steps 9-18
203 2-3
Step 3
Step 8

Model HCH-930/932
2-6. CLEANING WATER VALVE 16. Replace the coil and press it firmly against the body.
(Continued)
17. Position the coil terminals so they line up with the outlet of the
water valve.
18. Position the coil retainer with open side up, and fasten with the 2
screws removed earlier.
19. Remount the water valve and reconnect the tubing in reverse
order of disassembly.
20. Reconnect the wires to the valve.
21. Replace the cabinet top.
22. Reconnect the water supply tubing to the water strainer and turn
on the water supply.
23. Reconnect the electrical supply to the cabinet.
2-7. REPLACING WATER VALVE 1. Follow steps 1 through 8 of section 2-6.
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 brass fitting from the outlet side of the water valve.
3. Install the fitting, just removed, on the outlet side of the new valve.
Place pipe sealant on the threads of the fittings.
4. Mount the new water valve and connect the tubing to the outlet
side in reverse order of disassembly.
5. Reconnect the wires to valve.
6. Replace cabinet top.
7. Reconnect water supply tubing to the water strainer and turn on
water supply.
8. Reconnect electrical supply to the cabinet.
2-4 203

Model HCH-930/932
2-8. FLOAT SWITCH 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 cabinet top.
3. Remove the float switch wire from the L1 wire nut, and check for
continuity across this wire and terminal 3 of the solid state relay.
With the float in the raised position, the circuit should be open.
With the float in the lowered position, the circuit should be closed.
If the float is not defective, reconnect the float switch wire to the
L1 wire nut. If it proves defective, continue with the steps below.
4. Cut the float switch wire that attaches to terminal 3 on the solid
state relay.
5. Remove the 2 screws securing the float switch well and pull the
well up and out of the heater box cover.
6. Remove the nut securing the float switch in the well and remove
the old float switch. Save the 2 spacers removed with the float
Step 5 switch.
7. Install new float switch using the 2 white spacers from step 6.
Tighten the float switch nut finger tight only! Over-
tightening the nut damages the float switch.
8. Reinstall the float switch well.
Step 6
9. Strip the end of the cut wire from step 4, and attach it to one of
the new float switch wires, using a wire nut.
10. Connect the other float switch wire to the L1 wire nut.
11. Replace the cabinet top.
12. Reconnect the electrical supply to the cabinet.
203 2-5

Model HCH-930/932
2-9. SOLID STATE DELAY TIMER 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 cabinet top.
3. Remove the 2 nuts securing the relay to the back of the control
panel.
4. Transfer the 5 relay wires, one-at-a-time, from the old relay to the
new one.
5. Mount the new relay on the back of the control panel with the 2
nuts removed earlier.
6. Replace the cabinet top.
7. Reconnect the electrical supply.
2-10. BLOWER 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 cabinet top.
3. Remove the 2 blower wires from the L1 and L2 wire nuts.
Step 4 4. Remove the 4 screws and lockwashers securing the blower to the
blower box, and remove blower.
5. Install new blower in reverse order of disassembly.
6. Reconnect the electrical supply to the cabinet.
2-6 203
Solid State Delay Timer

Model HCH-930/932
2-11. HEATER 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 cabinet top.
3. Remove the 2 screws securing the high limit to the heater, and pull
Step 5 high limit from heater.
4. Remove the 2 wires attached to the heater terminals.
5. Remove the 2 screws securing the heater to the heater box cover,
and remove heater from unit.
6. Install new heater in reverse order.
7. Reconnect electrical supply to the cabinet.
2-12. HIGH LIMIT 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 cabinet top.
3. Remove the 2 wires attached to the high limit.
4. Check for continuity across the 2 terminals of the high limit. As
long as the temperature of the cabinet is below 210o F (99o C),
and the blower is operating properly, the high limit should be
closed. If the high limit is defective, continue with the following
steps.
5. Remove the 2 screws securing the high limit to the heater, and pull
high limit from heater.
Step 5
6. Install new high limit in reverse order.
7. Reconnect electrical supply to the cabinet.
203 2-7

Model HCH-930/932
2-13. THERMOMETER 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 cabinet top.
3. Remove the 4 nuts securing the blower box to the cabinet.
4. Pull the blower box up to expose the thermometer and thermo-
stat bulbs. Carefully lay the blower and blower box off to one
side.
5. Remove the 2 nuts securing the bulb retaining clips and remove
the thermometer bulb from the clips.
6. Remove the nut securing the thermometer to the mounting brack-
et on the back of the thermometer body.
7. Remove the thermometer through the control panel.
8. Install new thermometer in reverse order, using the bulb clips pro-
vided with the thermometer.
When remounting the blower box to the cabinet, the ther-
mometer and thermostat capillary tubes must pass through
the corners of the blower box, or damage to the components
could result.
9. Reseal notches in the blower box corners with silicone sealant.
10. Replace the cabinet top.
11. Reconnect the electrical supply to the cabinet.
2-8 203
Step 3
Step 5
Step 6

Model HCH-930/932
2-14. THERMOSTAT 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 cabinet top.
3. Remove the wires from thermostat. Check for continuity across
the 2 terminals. With the thermostat set at the maximum setting
(all the way clockwise), the circuit should be closed. In the OFF
position (all the way counterclockwise), the circuit should be
open. If the thermostat is defective, continue with the following
steps.
Step 3
4. Remove the 4 nuts securing the blower box to the cabinet.
5. Pull the blower box up to expose the thermometer and thermo-
stat bulbs. Carefully lay the blower and blower box off to one
side.
6. Remove the 2 nuts securing the bulb retaining clips and remove
the thermostat bulb from the clips.
7. Remove the 2 nuts securing the thermostat bracket to the panel.
8. Remove the 2 screws securing the thermostat to the bracket, and
remove the thermostat.
9. Install new thermostat in reverse order, using the bulb clips pro-
Step 7 vided with the thermometer.
When remounting the blower box to the cabinet, the ther-
mometer and thermostat capillary tubes must pass through
the corners of the blower box or damage to the components
could result.
10. Reseal notches in the blower box corners with silicone sealant.
11. Replace the cabinet top.
12. Reconnect the electrical supply to the cabinet.
203 2-9

Model HCH-930/932
2-15. POWER SWITCH 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 cabinet top.
3. Remove the wires from the switch. Check for continuity across
the 2 terminals. In the ON position, the circuit should be closed.
In the OFF position, the circuit should be open. If the switch is
defective, continue with the following steps.
4. Loosen the nut securing the switch on the back side of the control
panel, and then remove the nut on the front of the control panel.
5. Remove the switch from the unit.
6. Install the switch in reverse order.
Step 4
7. Replace cabinet top.
8. Reconnect electrical supply to the cabinet.
2-16. INDICATING LIGHTS 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 cabinet top.
3. Cut the light wires just behind the body of the light.
4. Remove the light by squeezing the retainers on the body and push-
- ing the light out through the front of the control panel.
5. Install new light by pushing it through the front of the control panel
until it snaps into place.
Step 4 6. Strip ends of cut wires and connect to new light wires.
7. Replace cabinet top and reconnect electrical supply to cabinet.
2-10 203

Model HCH-930/932
2-17. FAN 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 cabinet top.
3. Cut the fan wires about 6 inches (152.4 mm) from the fan.
Step 3
4. Remove the 4 nuts and screws securing the fan and remove fan
from the cabinet.
5. Install new fan in reverse order.
6. Strip ends of cut wires and connect them to the new fan wires.
Step 4
7. Replace cabinet top.
8. Reconnect electrical supply to cabinet.
2-18. DRAWER GASKET 1. Remove the basket from the drawer and basket from the cabinet.
2. Remove the 2 screws securing the drawer handle and remove the
handle from the drawer. (Location of mounting screws may vary
depending on type of handle on the drawer.)
Step 2
203 2-11

Model HCH-930/932
2-18. DRAWER GASKET 3. Remove the 4 screws securing the backing plate and gasket to
(Continued) the drawer front.
4. Separate the drawer frame from the drawer front.
5. Remove the gasket from the drawer.
6. Fit new gasket into place in the drawer front.
Step 3 7. Reassemble the drawer frame and drawer front in reverse order
of disassembly. Center the 2 drawer handle spacers over the
screw holes so the handle screws pass through the spacers.
2-19. DRAWER AND LINER Apply Loctite to screw threads when replacing drawer bearing kit
BEARING REPLACEMENT (part no. 14094), or liner bearing kit (part no. 14095). If using exist-
ing hardware, clean threads of any old Loctite before applying new
Loctite sealant (part no. MS01-158). Perform this procedure after
store closing to ensure Loctite has a chance to dry before using the
cabinet. Bearings are to stay stationary, and are not to roll with the
drawers.
2-12 203