Henny Penny 590 Guide

Model 590/592
This section provides checkout and replacement procedures,
for various parts of the fryer. Before replacing any parts, refer
to the Troubleshooting Section to aid you in finding the cause
of the malfunction.
1. A multimeter will help you to check 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 circuit being open, multimeter
should read infinity.
Do not move fryer with hot shortening in the frypot or
filter pan. Severe burns can result from splashing hot
shortening.
4. Remove weights from frame to easily access rear of fryer.
To ensure a long life of fryers and their components, regular
maintenance should be performed. Refer to the chart below.
Procedure Frequency
Filtering of shortening See KFC’s Standards Library
Changing of shortening See KFC’s Standards Library
Changing the filter envelope See KFC’s Standards Library
Cleaning deadweight assy. Daily-See Deadweight Valve
Section
Cleaning the frypot See KFC’s Standards Library
Reversing lid gasket Each 90 Days-see Reversing
Lid Gasket Section
Lubricate rear lid rollers Annually-See Lubricating Lid
Rollers Section
Cleaning safety relief valve Annually-See Removal/Cleaning
of Safety Relief Valve Section
307 2-1
SECTION 2. MAINTENANCE
2-1. INTRODUCTION
2-2. MAINTENANCE HINTS
2-3. PREVENTIVE
MAINTENANCE

Model 590/592
This high temperature control is a safety, manual reset control,
which senses the temperature of the shortening. If the shorten-
ing temperature exceeds 425°F (218°C), this switch opens
and shuts off the heat to the frypot. When the temperature of
the shortening drops to a safe operation limit, manually reset
by pressing the red reset button. The red reset button is located
under the control panel, in the front of the fryer, to the right of
the drain. Once reset, the frypot starts heating.
Checkout
Before replacing a high temperature limit control, check to see
that its circuit is closed.
The shortening temperature must be below 380°F (193°C)
to accurately perform this check.
1. Remove electrical power supplied to the fryer.
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 control panel.
3. Remove the inner heat shield.
4. Remove two nuts securing the high limit bracket to unit,
and pull the bracket from the unit.
5. Remove two screws securing the high limit to the bracket,
and remove the high limit from the bracket.
6. Remove the two electrical wires from the high temperature
limit control.
7. Manually reset control, then check for continuity between
the two terminals after resetting the control. If circuit is
open, replace control, then continue with this procedure. (If
the circuit is closed, high limit is not defective. Reconnect
the two electrical wires.)
2-2 1103
2-4. HIGH TEMPERATURE
LIMIT CONTROL

Model 590/592
To avoid electrical shock of property damage, move the
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
Replacement
1. If the tube is broken or cracked, the control will open,
shutting off electrical power. The control cannot be reset.
2. Drain shortening from the frypot and discard. Asubstance
in the tube could contaminate the shortening.
3. Remove control panel.
4. Loosen small inside screw nut on capillary tube.
5. Remove capillary bulb from bulb holder inside the frypot.
6. Straighten the capillary tube.
7. Remove larger outside nut that threads into pot wall, and
remove defective control from control panel area.
8. Insert new control and replace screws.
9. Uncoil capillary line, starting at capillary tube, and insert
through frypot wall.
To avoid electrical shock or other injury, run capillary
line under and away from all electrical power wires and
terminals. The tube must never be in such a position
where it could accidentally touch the electrical power
terminals.
10. Carefully bend the capillary tube as shown in photo and
place into bulb brackets.
1103 2-3
2-4. HIGH TEMPERATURE
LIMIT CONTROL
(Continued)

Model 590/592
11. Pull excess capillary line from pot and tighten nut into
frypot wall.
Be sure capillary bulb of high limit is positioned so it does
not interfere with carrier or get damaged when cleaning
frypot.
12. With excess capillary line pulled out, tighten smaller nut.
13. Replace inner and front panels.
14. Refill with shortening.
There are two fuse holders on each model of the electric fryers.
To check or change fuse, unscrew black fuse holder cap.
To avoid electrical shock or property damage, move the
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
Checking Procedure for Fuse Holders
CONTROL PANEL FUSES 3 Phase
Remove the control panel and pull the wires from the fuse
holder terminals. Using a multimeter or continuity light, check
across the terminals. The circuit should be closed. If not, re-
place the fuse (HP# EF02-007) or fuse holder (HP# EF02-006).
2-4 1103
2-4. HIGH TEMPERATURE
LIMIT CONTROL
(Continued)
2-5. FUSE HOLDERS

Model 590/592
The POWER/PUMP switch is a three way rocker switch with a
center OFF position. With switch in the POWER position, the
fryer operates. With switch in PUMP position, the filter pump
operates, but the unit will not heat.
To avoid electrical shock or property damage, move the
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
Checkout
1. Remove control panel.
2. Label and remove wires from the switch.
3. OFF position-should be open circuit anywhere on switch.
4. Power position. Check from: #5 to #6 closed circuit
#l to #2 closed circuit
5. Pump position. Check from: #4 to #5 closed circuit
#3 to #2 closed circuit
Check across the jumpers on the wires of POWER/PUMP
switch. These jumpers have resistors and capacitors which
may be faulty.
Replacement
1. With control panel removed, and wires off of the switch,
push in on tabs on the switch to remove from the panel.
2. Replace with new switch, and reconnect wires to switch
following the wiring diagram.
3. Replace the control panel.
1103 2-5
2-6. POWER/PUMP SWITCH

Model 590/592
The temperature probe relays actual shortening temperature to
the control. If it becomes disabled, “E06” will show in the dis-
play. Also, if temperature is out of calibration more than 10°F,
or 10°C, the temperature probe should be replaced. An Ohm
check can be performed also. See chart at end of this section.
1. Remove electrical power supplied to the fryer.
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. Drain the shortening from the frypot.
3. Remove the control panel.
4. Using a 1/2” wrench, remove the nut on compression fitting.
5. Remove the temperature probe from the frypot.
6. Place nut and new ferrule on new temperature probe and
insert temperature probe into compression fitting until it
extends one-half (1/2) inch (1.3 cm) into frypot. Use temp-
erature probe gauge provided in temperature probe kit, to
ensure proper placement in frypot. See Figures 2-1 & 2-2.
7. Tighten hand tight and then a half turn with wrench.
Excess force will damage temperature probe.
8. Connect new temperature probe to PC board and replace
control panel.
9. Replace shortening.
10. Turn power on and check out fryer.
2-6 407
Figure 2-1
2-7. TEMPERATURE PROBE
REPLACEMENT
Figure 2-2

Model 590/592
Should the control panel become inoperative, follow these
instructions for replacing the board.
1. Remove electrical power supplied to the fryer.
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 two screws securing he control panel and lift
panel up and out
3. Unplug the connectors going to the control board.
4. Install a new control panel.
The Henny Penny Fryer uses pressure as one of the compo-
nents of the cooking process. Once the lid is sealed to the
frypot, and the solenoid valve closes, a deadweight valve main-
tains the correct pressure in the frypot.
The lid has minimal and limited maintenance and repair proce-
dures, which are addressed in the following sections.
The following is a routine maintenance schedule for the Lid:
Every 90 days
• Clean and reverse the lid gasket
Yearly Inspection
• Check Lid Gasket for splits and tears-replace if necessary
• Check Pressure Pads for wear-rotate if necessary
• Check Cam Slide Guides-replace if worn or broken
• Check Lid Rollers-replace if cracked or damaged
1103 2-7
2-8. COMPLETE CONTROL
PANEL-HENNY PENNY
2-9. PRESSURE REGULATION

Model 590/592
The Lid Assembly is easily tilted up for cleaning or servicing.
1. Raise the lid and remove racks and carrier.
2. Grasping the lid handle, lift the front of the lid up until it
stops in an upright position.
Be sure the metal arm on the left side of the lid is in the
vertical position holding lid upright, or severe injuries
could result. (See photo at left).
The gray rubber gasket surrounding the inside of the lid is de-
signed to be reversed.
Because of heat expansion and the pressure used for cooking
process, gasket is constantly under extreme stress. Reversing
the lid gasket will help to assure that the fryer will not lose
pressure through leakage.
1. Put the lid in the upright position, as previously described.
2. Using a thin blade screwdriver, pry out the gasket at the
corners. Remove the gasket.
Check the gasket for any tears or nicks. If the gasket is
damaged it needs to be replaced.
Be sure the metal arm on the left side of the lid is in the
vertical position holding lid upright, or severe injuries
could result. (See photo in Tilting Lid Upright section)
3. Clean the gasket and gasket seat with hot water.
4. Rotate the gasket with the opposite side facing out.
Install the 4 corners of the lid gasket. Smooth gasket into
place, working from the corners towards the middle of each
side.
2-8 1103
2-10. TILTING THE LID
UPRIGHT
2-11. REVERSING THE LID
GASKET

Model 590/592
The Lid Counterweight in the back of the fryer balances the
weight of the lid system to allow easier opening and closing of
the lid. The weight has two cables attached to it, and weighs
about 150 lbs. (67.5 Kg).
1. Using a 3/8” socket, remove the nuts securing rear shroud
of the fryer and remove the shroud.
2. Using Phillips-head screwdriver, remove screws securing
the top cap and remove cap.
3. Raise the lid.
4. Unscrew broken cable from the weight assembly and the
bracket attached to the fryer, and remove broken cable.
5. Screw a 5/16” nut on each end of the new cable.
6. Using a wrench, screw new cable into the weight assembly
until tight.
7. Using a 1/2” wrench, tighten nut (already threaded on the
cable) against weight assembly, securing the cable into the
weight assembly.
8. Pull cable over pulley and down behind weight assembly.
9. Insert cable into the hole in the bracket and screw a 5/16”
nut onto end of cable. Tighten cable, by screwing the cable
through this nut until the weight assembly becomes
level.
The safety cable should now have slack in it with the
weight assembly level.
10. Tighten nut against the top of the bracket, securing the
cable.
11. Replace the top cap and rear shroud. The repair is now
complete.
1103 2-9
2-12. LID COUNTERWEIGHT
CABLES

Model 590/592
The pressure pads are plastic strips that the lid cam presses
against to seal the lid.
1. Raise the lid.
2. Remove the 4 screws securing the lid cover and remove
cover.
3. Push the lid cam back, off of the pressure pads.
4. Using an Allen wrench, remove the large bolt securing the
pad.
5. Using a Phillips head screw driver, remove the small screw
securing the pad and remove the broken pad.
If the pressure pad is worn, but not broken, it can be
reversed 180 degrees, and the other end of the pad used.
6. Install new pad in reverse order.
2-10 1103
2-13. PRESSURE PAD