Page 2 - TABLE OF CONTENTS
ELECTRIC COMBI OVENS Page 2 of 68 TABLE OF CONTENTS GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....
Page 4 - GENERAL; INTRODUCTION; General; OPERATION; Water Supply
ELECTRIC COMBI OVENS - GENERAL Page 4 of 68 GENERAL INTRODUCTION General The procedures in this manual apply to all modelsunless otherwise specified. All of the information,illustrations and specifications contained in thismanual are based on the latest product informationav ailable at the time of p...
Page 6 - PROGRAMMABLE; OVEN CONTROLS
ELECTRIC COMBI OVENS - GENERAL Page 6 of 68 PROGRAMMABLE STANDARD MANUAL DELUXE MANUAL OVEN CONTROLS
Page 7 - Standard
ELECTRIC COMBI OVENS - GENERAL Page 7 of 68 WATER CONDITIONING Furnishing the steam generator with treated water toreduce scale formation is important. Scale formationwill reduce steam output, cause prematurecomponent failure, and shorten equipment life. Mostwater supplies contain scale producing mi...
Page 8 - REMOVAL AND REPLACEMENT OF PARTS; ASSEMBLY; COVERS AND PANELS; Side Panels
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 8 of 68 REMOVAL AND REPLACEMENT OF PARTS RACK GUIDE/FILTER/EXHAUST ASSEMBLY 1. Turn the ov en off. 2. Remov e the racks (if equipped). 3. Push the rack guide to rear of ov en to remov ethe rack guide tabs from slots in the exhaustassembly (...
Page 9 - OVEN TEMPERATURE PROBE
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 9 of 68 Rear Panel 1. Remov e the screws from the rear ov en panel.Hold the panel in place before remov ing thelast panel screw. 2. Access the inside edge of the panel at thebottom left and disconnect the ground wire (ifpresent). 3. Lower t...
Page 10 - PROGRAMABLE OVEN
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 10 of 68 PROGRAMABLE OVEN CONTROL WARNING: DISCONNECT THE ELECTRICALPOW ER TO THE MACHINE AT THE MAINCIRCUIT BOX. PLACE A TAG ON THE CIRCUITBOX INDICATING THE CIRCUIT IS BEINGSERVICED. CAUTION: Certain components in this systemare subject t...
Page 11 - MANUAL OVEN CONTROLS; RELAY BOARD
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 11 of 68 6. Remov e the display/keypad board from thecontrol panel by remov ing the mounting nuts. 7. Rev erse procedure to install. MANUAL OVEN CONTROLS WARNING: DISCONNECT THE ELECTRICALPOW ER TO THE MACHINE AT THE MAINCIRCUIT BOX. PLACE ...
Page 12 - BLOWER AND MOTOR; Removal
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 12 of 68 3. Release the clips on the back of the mountingrail. 4. Rev erse procedure to install. BLOWER AND MOTOR WARNING: DISCONNECT THE ELECTRICALPOW ER TO THE MACHINE AT THE MAINCIRCUIT BOX. PLACE A TAG ON THE CIRCUITBOX INDICATING THE C...
Page 13 - Installation; BLOWER MOTOR SHAFT SEAL
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 13 of 68 Installation 1. Mount the motor to the back of the ov en.Tighten the bolts enough to hold the motor inplace, but allow some mov ement. 2. Ensure that the motor shaft is centered (useshaft centering tool) in the motor shaft hole and...
Page 14 - Steam Generator
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 14 of 68 Steam Generator 1. Turn off the water supply to the steamgenerator. 2. Remov e the right side panel as outlined under“COVERS AND PANELS”. 3. Remov e the thermal fuse and protectiv e sleev efrom the heater thermowell. 4. Disconnect ...
Page 15 - VENT DAMPER ASSEMBLY DIAGRAM; STEAM GENERATOR DRAIN; VENT DAMPER ASSEMBLY; Vent Motor
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 15 of 68 VENT DAMPER ASSEMBLY DIAGRAM STEAM GENERATOR DRAIN PUMP 1. Turn off the ov en and allow the steamgenerator to drain. WARNING: DISCONNECT THE ELECTRICALPOW ER TO THE MACHINE AT THE MAINCIRCUIT BOX. PLACE A TAG ON THE CIRCUITBOX INDI...
Page 16 - Sealing Washer; Shaft Extension; WATER LEVEL SENSORS AND; NOTE: Some water will continue to drain out.
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 16 of 68 Sealing Washer 1. Remov e the right side panel as outlined under“COVERS AND PANELS”. 2. Open the ov en door and remov e the rackguide, filter and exhaust assembly as outlinedunder “RACK GUIDE/FILTER/EXHAUSTASSEMBLY”. WARNING: THE F...
Page 17 - STEAM GENERATOR TANK
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 17 of 68 10 LEVEL SHOW N 5. Remov e the water equalization tube. 6. Rev erse procedure to install. STEAM GENERATOR TANK 1. Turn the ov en off and allow the steamgenerator tank to drain. WARNING: DISCONNECT THE ELECTRICALPOW ER TO THE MACHIN...
Page 18 - OVEN DOOR; Disassembly
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 18 of 68 OVEN DOOR WARNING: DISCONNECT THE ELECTRICALPOW ER TO THE MACHINE AT THE MAINCIRCUIT BOX. PLACE A TAG ON THE CIRCUITBOX INDICATING THE CIRCUIT IS BEINGSERVICED. Removal 1. Remov e the left and right side panels asoutlined under “CO...
Page 19 - DOOR LAMP; OVEN DOOR HINGES
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 19 of 68 DOOR LAMP WARNING: DISCONNECT THE ELECTRICALPOW ER TO THE MACHINE AT THE MAINCIRCUIT BOX. PLACE A TAG ON THE CIRCUITBOX INDICATING THE CIRCUIT IS BEINGSERVICED. 1. Remov e the screws holding the cov er andgasket. 2. Pull the lamp a...
Page 20 - DOOR MAGNETIC REED SWITCH; DOOR SEAL; DOOR LOCKING MECHANISM; Replacement
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 20 of 68 6 AND 10 LEVELS DOOR MAGNETIC REED SWITCH WARNING: DISCONNECT THE ELECTRICALPOW ER TO THE MACHINE AT THE MAINCIRCUIT BOX. PLACE A TAG ON THE CIRCUITBOX INDICATING THE CIRCUIT IS BEINGSERVICED. 1. Remov e the right side panel as out...
Page 21 - OVEN CAVITY SEAL
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 21 of 68 4. Remov e the spring and positioning plate fromthe locking arm. 5. Rev erse procedure to install and adjust asoutlined under “OVEN DOOR ADJUSTMENT”in “SERVICE PROCEDURES ANDADJUSTMENTS”. Disassembly 1. Remov e the three screws tha...
Page 22 - POWER SUPPLY BOARD; CONTACTORS
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 22 of 68 POWER SUPPLY BOARD AND TRANSFORMER WARNING: DISCONNECT THE ELECTRICALPOW ER TO THE MACHINE AT THE MAINCIRCUIT BOX. PLACE A TAG ON THE CIRCUITBOX INDICATING THE CIRCUIT IS BEINGSERVICED. 1. Remov e the right side panel as outlined u...
Page 23 - OVEN CAVITY DRAIN
ELECTRIC COMBI OVEN - REMOVAL AND REPLACEMENT OF PARTS Page 23 of 68 OVEN CAVITY DRAIN WARNING: DISCONNECT THE ELECTRICALPOW ER TO THE MACHINE AT THE MAINCIRCUIT BOX. PLACE A TAG ON THE CIRCUITBOX INDICATING THE CIRCUIT IS BEINGSERVICED. 1. Open the ov en cav ity door. 2. Lift up the ov en cav ity d...
Page 24 - SERVICE PROCEDURES AND ADJUSTMENTS; PROGRAMABLE CONTROL
ELECTRIC COMBI OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Page 24 of 68 SERVICE PROCEDURES AND ADJUSTMENTS WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST ORMEASUREMENTS W HILE POW ER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALLTIMES. IF TEST POINTS ARE NOT EASILY A...
Page 25 - DIAGNOSTIC TEST MODE -
ELECTRIC COMBI OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Page 25 of 68 NOTE: The temperature selected in the table belowwill also be the highest starting point temperatureav ailable, when the steam mode is selected. ELEVATION (FT) TEMPERATURE (°F) Sea level to 500 212 500 to 1000 211 1,000 to 2,000...
Page 26 - MANUAL CONTROLS
ELECTRIC COMBI OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Page 26 of 68 3. The DISPLAY and LED test consists of flashingall displays and LED’s. The word “test” will flashintermittently as the temperature display istested. Verify all the DISPLAYS and LED’s areflashing. This test will continue until a...
Page 29 - SERVICE ERROR LIGHTS
ELECTRIC COMBI OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Page 29 of 68 CODE RELAY COMPONENT TEST CONDITION 01 K1 door motor Door magnetic reed switch. Result will be displayedautomatically. Rotate the door handle to change thecondition. Press and hold the TEMP key to close thedoor; release to open....
Page 30 - HEATING ELEMENTS; OVEN DOOR ADJUSTMENT
ELECTRIC COMBI OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Page 30 of 68 HEATING ELEMENTS WARNING: THE FOLLOW ING STEPS REQUIREPOW ER TO BE APPLIED TO THE UNIT DURINGTHE TEST. USE EXTREME CAUTION AT ALLTIMES. 1. Measure the v oltage at the heating elementterminals and v erify it against the data plat...
Page 33 - CLEAN CYCLE MODE - STEAM
ELECTRIC COMBI OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Page 33 of 68 4. To adjust the buzzer v olume, turn the buzzerv olume adjustment screw until the desiredv olume is obtained. 5. Once the buzzer frequency and v olume are setto the desired lev els, press the START key tosav e the setting and e...
Page 35 - Battery Test
ELECTRIC COMBI OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Page 35 of 68 BATTERY BACKUP - PROGRAMABLE CONTROL The battery backup module allows the SRAM (staticram) to retain the configuration and programinformation in memory if there is a power loss. Thebattery backup may come in a two piececonfigura...
Page 36 - Battery Replacement
ELECTRIC COMBI OVENS - SERVICE PROCEDURES AND ADJUSTMENTS Page 36 of 68 TW O PIECE CONFIGURATION SHOW N Battery Replacement WARNING: DISCONNECT THE ELECTRICALPOW ER TO THE MACHINE AT THE MAINCIRCUIT BOX. PLACE A TAG ON THE CIRCUITBOX INDICATING THE CIRCUIT IS BEINGSERVICED. NOTE: W hen remov ing and...
Page 37 - ELECTRICAL OPERATION; COMPONENT FUNCTION
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 37 of 68 ELECTRICAL OPERATION COMPONENT FUNCTION 1A Relay Board . . . . . . . . . . . . . . . Takes the inputs from ov en control board to operate relays that controlpower to the components. 2A Oven Control . . . . . . . . . . . . . . Manages all funct...
Page 38 - TF Thermal Fuse
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 38 of 68 2SOL Drain CoolDown Solenoid Valve . . . . . . . . . . Admits cold water to the cav ity drain and mixes with the hot to condensesteam and cool the drain water before entering the floor drain. Thissolenoid v alv e is energized whenev er the ste...
Page 40 - COMPONENT LOCATION
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 40 of 68 COMPONENT LOCATION
Page 42 - SEQUENCE OF OPERATION; Heating Mode and Cavity Fan Speeds
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 42 of 68 SEQUENCE OF OPERATION The conv ection and steam heating theory outlined below, cov ers the programable and manual ov en controlsunless otherwise stated. Heating Mode and Cavity Fan Speeds KM1 = 1/2 power and full speed cav ity fan(s). KM2 = 1/...
Page 43 - Steam Regulation
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 43 of 68 On 20 lev el machines (half and full size) the heatingmode regulation is the same but with theseadditional points to remember: Top and bottom heating elements operateindependently and correspond to the top andbottom cav ity temperature probes....
Page 45 - Programable Oven Control; Powering Control; Convection Mode
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 45 of 68 Programable Oven Control This sequence of operation is written for the combiov en models that use the programable ov en control.The three heating modes outlined below(conv ection, steam and combi) are for manualoperation of the ov en. The auto...
Page 46 - Steam Mode
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 46 of 68 3. Press the temp key to set the operatingtemperature (default setting is 302°F;adjustable range is 35 to 518°F). A. Press the temperature up or down keys toadjust the setting. 4. Start/Stop key is pressed to begin the cookingcycle. A. Start/S...
Page 47 - Combi Mode; Automatic Operation
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 47 of 68 A. Start/Stop LED off. B. Steam generator heating elements de-energized. C. Cav ity fan motor(s) de-energized. D. Steam mode remains selected with LEDon. E. Cav ity v ent remains closed. F. The operating temperature remains asentered unless th...
Page 48 - NOTE: Assume heating mode already selected.
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 48 of 68 4. Cooking time expires. A. Buzzer sounds for approximately 10seconds on and 45 seconds off. Thebuzzer continues to cycle at these timesuntil the Start/Stop key is pressed. B. Conv ection and/or steam generatorheating elements de-energized. C....
Page 49 - Manual Oven Controls
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 49 of 68 A. Press the temp up or down keys to set theDelta T differential. 3. Press probe key. A. Press the time up or down keys to set thefinal product temperature. 4. Press Start/Stop key to begin the cookingcycle. NOTE: The Delta T differential can ...
Page 53 - Powering Down
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 53 of 68 NOTE: To display the actual probe temperaturefor 5 seconds, press and hold the probe key. 3. Press Start key to begin the cooking cycle. A. Start LED on. NOTE: The probe temperature can be adjustedthroughout the cooking cycle by pressing the p...
Page 54 - WIRING DIAGRAMS; Level
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 54 of 68 WIRING DIAGRAMS 6 Level
Page 60 - ELECTRIC HEATER CIRCUITS
ELECTRIC COMBI OVEN - ELECTRICAL OPERATION Page 60 of 68 ELECTRIC HEATER CIRCUITS
Page 63 - TROUBLESHOOTING; SYMPTOM
ELECTRIC COMBI OVENS - TROUBLESHOOTING Page 63 of 68 TROUBLESHOOTING WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST ORMEASUREMENTS W HILE POW ER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALLTIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POW ER, ATTACH T...
