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Model 590/592
SECTION 2. MAINTENANCE
2-1. INTRODUCTION
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 fi nding the cause
of the malfunction.
2-2. MAINTENANCE HINTS
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 ref
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Model 590/592 2-4. HIGH TEMPERATURE This high temperature control is a safety, manual reset control, LIMIT 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,
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Model 590/592 2-4. HIGH TEMPERATURE LIMIT CONTROL (Continued) 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. A substance in the tube could contaminate the shortening. 3. Remov
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Model 590/592 2-4. HIGH TEMPERATURE 11. Pull excess capillary line from pot and tighten nut into LIMIT CONTROL frypot wall. (Continued) 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. Refi ll with shortening. 2-5. FUSE HOLDERS There are two fuse holders on each model of the elect
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Model 590/592 2-6. POWER/PUMP SWITCH 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 fi lter 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 w
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Model 590/592 2-7. TEMPERATURE PROBE The temperature probe relays actual shortening temperature to REPLACEMENT 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
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Model 590/592 2-8. COMPLETE CONTROL Should the control panel become inoperative, follow these PANEL-HENNY PENNY 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 c
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Model 590/592 2-10. TILTING THE LID The Lid Assembly is easily tilted up for cleaning or servicing. UPRIGHT 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). 2-11. REVERSING THE LID The gray rubber gaske
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Model 590/592 2-12. LID COUNTERWEIGHT The Lid Counterweight in the back of the fryer balances the CABLES 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 b
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Model 590/592 2-13. PRESSURE PAD 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 c
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Model 590/592 2-14. LID ADJUSTMENT If steam leaks out from around the lid gasket, the pressure pads could be worn or broken. If the pressure pad is worn, but not broken, it can be reversed 180 degrees, and the other end of the pad used. See Pressure Pad Section. If steam leaks, check for: • Pressure pad wear • Cracked or worn gasket • Gasket installed improperly • Fryer operating above 12 psi (827 mbar) Fryer should be operating at 12 psi, or serious burns c
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Model 590/592 2-15. SOLENOID VALVE This is an electro-mechanical device that causes pressure to be held in the frypot. The solenoid valve closes at the beginning of the Cook Cycle and opens automatically at the end of the Cook Cycle. If this valve should become dirty, or the Tefl on seat nicked, pressure will not build up. The electric fryer uses a 208/240 volt 60 hertz coil (50 hertz internationally). To avoid electrical shock or property damage, move the power switch to OFF an
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Model 590/592 2-15. SOLENOID VALVE 5. If the core-disc assembly is sticking due to buildup of (Continued) shortening, breading, and food particles, proceed with the following steps: a. Unscrew the solenoid bonnet assembly from solenoid valve body. b. Remove solenoid bonnet assembly and bonnet gasket. c. Remove the core-disc assembly, core spring retainer, and the core spring. d. Wash all these parts in hot water. If Tefl on seals need t
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Model 590/592 2-15. SOLENOID VALVE 13. W et “O” ring around seat with water and insert O-ring (Continued) assembly (fl at side fi rst) in valve through “IN” side of body. Use an eraser end of pencil and press in the Tefl on seal until it snaps into place. Be careful not to mar or nick the seat. The smallest nick can cause a pressure leak. Replace all O-ring seals that are in the parts kit and reas
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Model 590/592 2-16. DEADWEIGHT VALVE (Continued) DO NOT PULL THE RING ON THE SAFETY RELIEF VALVE. HOT STEAM WILL BE RELEASED AND SEVERE BURNS WILL RESULT. 1. At the end of each day’s usage of the fryer, the deadweight valve must be cleaned. The fryer must be OFF and pressure ORIFICE CAP DEADWEIGHT released. Open the lid and then remove the deadweight valve cap and deadweight. Failure to clean the deadweight assembly daily co
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Model 590/592 2-17. REMOVAL & CLEANING 2. Use a wrench to loosen the valve from the pipe tee, turn OF SAFETY RELIEF counterclockwise to remove. VALVE (Continued) 3. Clean the inside of the pipe tee with hot water. Turn the safety relief valve towards the rear of the fryer when reinstalling safety relief valve. 4. Immerse the safety relief valve in a soapy water solution for 24 hours. Use a 1 to 1 di
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Model 590/592 2-19. CONTACTORS The electric fryer requires two switching contactors: a primary and a heat contactor. The primary contactor energizes (contacts close) any time the POWER/PUMP switch is in the POWER position, and the temperature of the shortening is below 420° F ( 215° C). The high limit cuts power at the primary contactor if the temperature of the shortening is above 420° F ( 215° C). The primary contactor supplies power to one side of the heat contactor. Primary The
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Model 590/592 2-19. CONTACTORS (Continued) To avoid electrical shock, make connections before applying power, take reading, and remove power before removing meter leads. The following checks are performed with the wall circuit breaker closed and the main power switch in the ON position. 4. With power reapplied and in a heat-up mode, check the power going to both contactor coils. This is to be sure power is going to the contactors. If no voltage is found goi
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Model 590/592 2-20. HEATING ELEMENTS The electric model fryer uses 2 heating elements. Heating elements are available in 208, 220/240, 380 and 415 volts. Check the data plate, on the shroud behind the lid, to determine the correct voltage elements. 1. Remove the electrical power supplied to the unit. To avoid electrical shock or property damage, move the power switch to OFF and disconnect main circuit breaker
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Model 590/592 2-20. HEATING ELEMENTS (Continued) Replacement 1. Drain the shortening. 2. Remove the high limit bulb holder from the heating element inside the frypot. 3. Disconnect the heating element wires from the contactors. Label each so it can be replaced in the same position on the new element. 4. Remove the heat contactor, as described in Contactors Section, to access the left side element nuts. 5. Loosen the screws on the element spreaders. 6. Slide
