Henny Penny HMI-103 User manual

Henny Penny
Island Warmer
Model HMI-103
Model HMI-105
TECHNICAL MANUAL

Model HMI-103/105
TABLE OF CONTENTS
Section Page
Section 1. TROUBLESHOOTING...............................................................................................1-1
1-1. Introduction ........................................................................................................1-1
1-2. Safety..................................................................................................................1-1
1-3. Troubleshooting..................................................................................................1-2
Section 2. MAINTENANCE.........................................................................................................2-1
2-1. Introduction ........................................................................................................2-1
2-2. Test Instruments..................................................................................................2-1
2-3. Fuse.....................................................................................................................2-1
2-4. Radiant Heaters...................................................................................................2-2
2-5. Light Socket........................................................................................................2-2
2-6. Air Heaters..........................................................................................................2-3
2-7. Power Switch......................................................................................................2-3
2-8. Infinite Regulator................................................................................................2-4
2-9. High Limit ..........................................................................................................2-5
2-10. Front Glass Removal..........................................................................................2-6
2-11. Slide Glass Removal...........................................................................................2-7
2-12. Cooling Fans.......................................................................................................2-7
2-13. Contactor ............................................................................................................2-8
2-14. Wiring Diagrams ................................................................................................2-9
Section 3. PARTS INFORMATION..............................................................................................3-1
3-1. Introduction ........................................................................................................3-1
3-2. Genuine Parts......................................................................................................3-1
3-3. When Ordering Parts..........................................................................................3-1
3-4. Prices ..................................................................................................................3-1
3-5. Delivery..............................................................................................................3-1
3-6. Warranty .............................................................................................................3-1
3-7. Recommended Spare Parts for Distributors .......................................................3-1
810 i
FM06-015
Revised 08-12-10

Model HMI-103/105

Model HMI-103/105
SECTION 1. TROUBLESHOOTING
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 Operating
Instructions Section of the Operator’s manual.
203 1-1
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.
SAFETYALERT 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.
WARNING indicates a potentially hazardous situation
which, if not avoided, could result in death or serious
injury.

Model HMI-103/105
1-3. TROUBLESHOOTING To isolate a malfunction proceed as follows:
1. Clearly define the problem or symptom.
2. Locate the problem in the troubleshooting table.
3. Review all possible causes, then work through the list
of corrections one-at-a-time until the problem is solved.
Refer to maintenance procedures in Section 2 to safely
and properly make the checkout and repair needed.
PROBLEM CAUSE CORRECTION
OPERATIONS
Product not holding
temperature
A. Lights will not
turn on
• Radiant heat too low
• Only hold product for specified times
• Turn to a higher setting
• Check radiant heaters per Radiant
Heaters Section
• Turn to a higher setting
• Check heaters per Air Heaters Section
• Check cooling fan
• Check high limits
• Product held too long
• Air heat too low
• Air heaters not working
• High limit open
LIGHTING
• No neutral supplied in field wiring
• Check wiring and repair or replace
if necessary
• Loose or defective wiring
1-2 203
• Radiant heat not working
• Defective fuse • Check fuse and replace if necessary
• Faulty switch • Check switch and replace if necessary
• Check field wiring to be sure a true
neutral has been connected

Model HMI-103/105
PROBLEM CAUSE CORRECTION
• Replace with recommended bulb
• Replace socket per Light Socket Section
• Check switch and replace if necessary
• Faulty light bulb
B. Not all lights turn
on • Faulty light socket
• Faulty switch
HEATING SECTION
A. Radiant heat not
working • Faulty infinite regulator • Replace infinite regulator per
Infinite Regulator Section
• Faulty power switch • Check switch and replace if necessary
• Faulty heater • Check heater and replace if necessary
• Faulty contactor • Check contactor and replace if
necessary
• High limit opened • Check cooling fans
• Check high limits (reset)
B. Air heat not
working • Faulty infinite regulator • Replace infinite regulator per Infinite Regulator Section
• Faulty power switch • Check switch and replace if
necessary
• Faulty heater • Check heater and replace if necessary
• Faulty contactor • Check contactor and replace if
necessary
• High limit opened • Check cooling fans
• Check high limits (reset)
203 1-3
1-3. TROUBLESHOOTING (Continued)

Model HMI-103/105

Model HMI-103/105
SECTION 2. MAINTENANCE
2-1. INTRODUCTION This section provides procedures for check out 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 want to use two test instruments to check the electric
components.
1. A continuity light
2. An ohmmeter
When the manual refers to a circuit being closed, the continuity
light will be illuminated or the ohmmeter should read zero
unless otherwise noted.
When the manual refers to a 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. FUSE 1. Remove electrical power supplied to the unit.
To avoid electrical shock or property damage, move
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
2. Open the control panel cover and locate both fuse holders.
3. Unscrew the caps, counterclockwise, and pull fuses from
holders.
4. Place leads of meter on each end of a fuse, and check for
continuity on both fuses. If one shows an open circuit,
replace it with a 15 amp fuse (HP no. EF02-007).
203 2-1
Step 2
Step 3

Model HMI-103/105
2-4. RADIANT HEATERS 1. Remove electrical power supplied to the unit.
To avoid electrical shock or property damage, move
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
2. Remove screws from access panel on both sides of radiant
heater and let light socket and heater hang down.
3. Remove screw from inner side of access panel.
4. Remove wires from heater; pull radiant heater from panel.
5. Install new radiant heaters.
The radiant heaters are paired and wired in series. If one
heater is bad, two won’t heat.
2-5. LIGHT SOCKET 1. Remove electrical power supplied to the unit.
To avoid electrical shock or property damage, move
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
2. Remove screws from access panel on both sides of light
socket, as shown above in the Radiant Heaters Section.
3. Remove wires from light socket.
4. Depress retainer on light socket and push through panel.
5. Install new light socket.
2-2 203
Step 2
Step 3
Step 4
Step 3
Step 4

Model HMI-103/105
2-6. AIR HEATERS 1. Remove electrical power supplied to the unit.
To avoid electrical shock or property damage, move
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
2. Remove pans and pan supports from unit.
3. Remove heater screws from inside of well.
4. Pull heater terminals out into interior of unit to access wires.
5. Remove wires from heater and pull heater from unit.
6. Install new heater.
2-7. POWER SWITCH 1. Remove electrical power supplied to the unit.
To avoid electrical shock or property damage, move
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
2. Open control panel cover and remove the four screws
securing the control panel.
3. Pull control panel out to access back of switch. Pull and
label the wires of switch.
203 2-3
Step 3
Step 5
Step 2
Step 3

Model HMI-103/105
2-7. POWER SWITCH (Continued) 4. Check across top and bottom terminals for continuity. With
the switch in the ON position, the circuit should be closed.
If not, replace switch by following the next steps.
5. Push in on the tabs at the ends of the switch and pull switch
out from front of the control panel.
6. Replace with new switch.
2-8. INFINITE REGULATOR 1. Remove electrical power supplied to the 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. Open control panel cover and remove four screws securing
the control panel.
3. Pull control panel out to access back of regulator. Pull and
label wires from regulator.
4. Pull out on regulator knob and remove the knob from front
of control panel.
5. Using a 5/8 wrench unscrew the nut on the front of control
panel, securing the regulator, and remove the regulator.
6. Install new infinite regulator.
2-4 203
Step 4
Step 5
Step 3
Step 4
Step 5

Model HMI-103/105
2-9. HIGH LIMIT 1. Remove electrical power supplied to the unit.
To avoid electrical shock or property damage, move
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
2. Open the control panel cover and remove the four screws
securing the access panel, and remove panel.
3. Pull wires from high limit and check for continuity across
terminals on high limit. If meter shows open circuit, with
unit cooled down, replace high limit, following next steps.
4. Remove the two nuts securing the high limit and pull high
limit from unit.
5. Install new high limit.
The cooling fan high limits are located behind access
panels in center of unit, one on each side. (See photo.)
These high limits must be manually reset. Then test high
limits, per above steps. Make sure fans are functioning
properly also.
203 2-5
Step 2
Step 4
Cooling Fan High Limit

Model HMI-103/105
2-10. FRONT GLASS REMOVAL 1. Using a flat blade screwdriver, remove both end panels.
2. Using a Phillips head screwdriver, remove screws
securing inner panel on control end, and remove panel.
3. Remove nuts securing hinge brackets and remove brackets.
4. Lift front glass assembly from unit.
2-6 203
Step 1
Step 2
Step 3
Step 4

Model HMI-103/105
2-11. SIDE GLASS REMOVAL 1. Remove front glass assy. per Front Glass Removal Section.
2. Pull side of glass straight up and out of brackets.
2-12. COOLING FANS 1. Remove electrical power supplied to the unit.
To avoid electrical shock or property damage, move
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
2. Remove the pans and pan supports from unit.
3. Remove four screws securing the access panel and
remove panel.
4. Slide cooling fan and bracket out of unit.
5. Remove cooling fan from bracket.
6. Install new cooling fan in reverse order.
203 2-7
Step 3
Step 4

Model HMI-103/105
2-13. CONTACTOR 1. Remove electrical power supplied to the unit.
To avoid electrical shock or property damage, move
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
2. Remove the pans and pan supports from unit.
3. Remove the four screws securing the access panel
and remove panel.
To avoid electrical shock, make connections before apply-
ing power, take reading, and remove power before re-
moving meter leads. The following checks are performed
with wall circuit breaker closed and main power switch
in the ON position.
4. With power reapplied, set infinite regulator to its highest setting.
5. Perform checks on the contactor as follows:
Test Points Results
From terminal 27 to 28 The voltage should read the
From terminal 28 to 29 same at each terminal and
From terminal 27 to 29 should correspond to voltage
rating stated on data plate.
6. Remove electrical power supplied to unit and remove and
label wires from contactor.
7. Perform checks on contactor as follows:
Test Points Results
From 23 to 29 open circuit
From 24 to 28 open circuit
From 22 to 26 open circuit
ohm reading 415
8. If contactor is defective, remove screws securing contactor
and remove contactor from unit.
9. Install new contactor.
2-8 203
Step 3
Steps 5 and 7
Step 6
Step 8

Model HMI-103/105
810 2-9
2-14. WIRING DIAGRAMS

Model HMI-103/105
2-10 810
2-14. WIRING DIAGRAMS (Continued)

Model HMI-103/105
810 2-11
2-14. WIRING DIAGRAMS (Continued)

Model HMI-103/105
2-12 810
2-14. WIRING DIAGRAMS (Continued)