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GE Monogram ZET1F Technical Service Manual
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GE Monogram ZET1F Technical Service Manual

GE Monogram ZET1F Technical Service Manual

French door - single wall ovens
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GE Appliances
Technical Service Guide
May 2015
French Door - Single Wall Ovens
ZET1F – Monogram
CT9070 – Café
Monogram
GE Appliances
General Electric Company
Louisville, Kentucky 40225
Café
31-9241

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Summary of Contents for GE Monogram ZET1F

  • Page 1 GE Appliances Technical Service Guide May 2015 French Door - Single Wall Ovens ZET1F – Monogram CT9070 – Café Monogram Café GE Appliances 31-9241 General Electric Company Louisville, Kentucky 40225...

  • Page 2: Important Safety Notice

    If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to ground are removed for service, they must be returned to their original position and properly fastened. GE Appliances Technical Service Guide Copyright © 2015 All rights reserved. This service guide may not be reproduced in whole or in part in any form without written permission from the General Electric Company.

  • Page 3: Table Of Contents

    French Door Table of Contents Safety Requirements ..................................5 Introduction ....................................... 6 ..............7 ................... 8 Nomenclature ....................................9 .................................. 10 Accessories ......................................10 Tools Needed ..................................... 11 ......................................12 Installation ......................................13 Owner's Manuals Information ..............................14 Oven Controls - ZET1F ................................... 15 Special Features - ZET1F ................................
  • Page 4 Door Height and Angle Adjustment ............................51 Element Operation ..................................52 Fault Codes......................................53 Service Test Mode ................................... 54 DC Circuits – ZET1F ..................................55 AC Schematic – ZET1F ................................... 56 Wiring Diagram – ZET1F ................................57 DC Circuits – CT9070 ..................................58 AC Schematic –...

  • Page 5: Safety Requirements

    Safety Requirements GE Factory Service Employees are required to use safety glasses with side shields, safety gloves and steel toe shoes for all repairs. Electrically Rated Glove and Steel Toed Work Boot Dyneema®Cut Resistant Dyneema® Cut Resistant Glove Glove Keeper...

  • Page 6: Introduction

    Introduction The new French door wall oven operates electrically in similar fashion as the present single wall ovens. The addition of the French door model gives the consumer the feel and appearance of a commercial oven. Both doors operate together when either one is opened or closed. This is accomplished by a chain and sprocket assembly.
  • Page 7 Monogram - French Door Single Wall Ovens French Door Design Inspired by commercial kitchen designs, the precision engineered chain-drive mechanism allows for one- hand opening of both doors at the same time Backlit Electronic Control Knobs and Bright LCD Display Are as elegant as they are ergonomic Wi-Fi Connect Allows control of the oven functions from anywhere inside or even outside the home, using a smartphone or...
  • Page 8 French Door Design Inspired by commercial kitchen designs, the precision engineered chain-drive mechanism allows for one- hand opening of both doors at the same time Wi-Fi Connect Allows control of the oven functions from anywhere inside or even outside the home, using a smartphone or other web-enabled mobile device Electronic Dial Controls The glass touch display and ergonomic control knobs are easy to operate and clean...

  • Page 9: Nomenclature

    Nomenclature P _ T 9 5 5 0 S F 1 S S Brand Color Code J - GE Engineering Digit C - Café 0 - 9 P - Profile Fuel Type Z - Monogram Model Year Blank - Electric...

  • Page 10: Accessories

    kW Rating kW Rating Circuit Size 240V 208V (Dedicated) 20 amps 4.9 kW – 7.2 kW 4.2 kW – 6.2 kW 30 amps 7.3 kW – 9.6 kW 6.3 kW – 8.3 kW 40 amps 9.7 kW – 12.0 kW 8.4 kW –...

  • Page 11: Tools Needed

    Tools Needed • 3/8” socket wrench or socket • 1/4” hex head nut driver or socket • T10 Torx bit • T20 Torx bit • 1/2” Open end wrench • 7/16” Open end wrench • Stubby Phillips screwdriver Special Tools Most screws are 1/4 in.
  • Page 12 Machine Control: A separate control board that contains all relays and communicates with user interface to control all outputs. The Machine Control is located behind the control panel housing. User Interface: A logic board that interprets customer input from the key panel and encoders. Glass Touch: A capacitive glass panel that transfers key pad touches to the user interface board.

  • Page 13: Installation

    Installation CUTOUT FOR SINGLE OVENS IN WALL CABINET NOTE: If the cabinet does not have a front frame and the sides are less than 3/4 in. (1.9 cm) thick, shim both sides equally to establish the cutout width. Dimension Dimension Description 30' Single Oven Cabinet width 30”...

  • Page 14: Owner's Manuals Information

    Owner's Manuals Information Owner’s Manuals (available on website) • 49-80707-1: ZET1F • 49-80711-1: CT9070 – 14 –...

  • Page 15: Oven Controls - Zet1F

    Oven Controls - ZET1F OVEN MODE TEMPERA TURE CLEAN REMOTE CLEAN W ARM PUSH ENABLE ENTER HIGH HIGH/LOW BAKE BROIL BROIL LOW BROIL CONV BAKE BROIL CRISP 1 RACK CONVECTION CONV BAKE BROIL MUL TI HOLD 3 SEC CONVECTION ROAST OVEN TIMER COOK...
  • Page 16 NOTE: When using the delay time feature, foods 13. Lock Controls: Locks out the control so that pressing the pads does not activate the controls. Press and hold the Oven Lights and Timer pads more than 1 hour before or after cooking. Room at the same time for three seconds to lock or temperature promotes the growth of harmful unlock the control.

  • Page 17: Special Features - Zet1F

    Special Features - ZET1F There are numerous special features that are controlled using the number key pad. • End tone: Cycle End Tone • Sabbath: Sabbath mode • Sound: Tone Volume • : Adjust the oven temperature • Setting: Clock Setting •...
  • Page 18 Cycle End Tone (End tonE) Adjust the Oven Temperature This is the tone that signals the end of a timed (UPPEr tE-P oFFSEt) session. You can change it to be one tone (bEEP) or a This feature allows the oven temperature to continuous repeating tone (Con).

  • Page 19: Sabbath Mode

    Sabbath Mode Sabbath mode disables the oven lights (the oven light will not turn on when the door is opened), all sounds (the control will not beep when a pad is pressed), Convection modes, Broil modes, Warm, Proof, and all time functions.

  • Page 20: Oven Controls - Ct9070

    Oven Controls - CT9070 1. Convection Cooking Modes: Convection 6. Cook Time: Counts down cooking time and cooking modes use increased air circulation complete. Press the Cook Time pad, rotate the depends on the mode. Your oven has the mini knob to program a cooking time in hours following convection cooking modes: Bake 1 and minutes, then press the mini knob to set Rack, Bake Multi, Broil, Roast and Low Broil...
  • Page 21 NOTE: When using the delay time feature, foods 13. Lock Controls: Locks out the control so that pressing the pads does not activate the controls. Press and hold the Oven Lights and Timer pads more than 1 hour before or after cooking. Room at the same time for three seconds to lock or temperature promotes the growth of harmful unlock the control.

  • Page 22: Special Features - Ct9070

    Special Features - CT9070 There are numerous special features that are controlled using the number key pad. • End tone: Cycle End Tone • Sabbath: Sabbath mode • Sound: Tone Volume • : Adjust the oven temperature • Setting: Clock Setting •...
  • Page 23 Cycle End Tone (End tonE) Adjust the Oven Temperature This is the tone that signals the end of a timer. You (UPPEr tE-P oFFSEt) can change it to be one tone (bEEP) or a continuous This feature allows the oven temperature to repeating tone (Con).

  • Page 24: Oven Removal

    Oven Removal For component servicing, the oven will have to be removed from the installation to gain access to these components: • Cooling fan motor • Wiring • L2 high limit thermostat • LED assemblies (Monogram model) • Convection motor •...

  • Page 25: User Interface And Encoders

    User Interface and Encoders User Interface and Encoders Access 1. Remove the two T20 Torx screws from the control panel. 2. Lift the bottom of the panel up and allow the top of the control to disengage from the top of the unit. 3.

  • Page 26: Machine Control

    Machine Control Machine Control Compartment Access 1. Remove power to the oven. 2. Remove the two T20 Torx screws from the control panel. 3. Lift the bottom of the panel up and allow the top of the control to disengage from the top of the unit. 4.

  • Page 27: Led Power Supply

    Machine Control Board Removal 1. Using a stubby Phillips head screwdriver, remove the one screw securing the board frame from the air divider. Convection Motor Cacpacitor Phillips Head Mounting Screw 2. Slide the board frame forward and to the right. wires connected to the machine control board.

  • Page 28: Led Assemblies

    LED Assemblies LED Wire Harness Plug Access 1. Remove power to the unit. 2. Safely remove the oven from the installation. 3. Remove the control panel. 4. Remove the top front housing cover. 5. Remove one 1/4 in. screw from latch cover to access two screws under the cover. 6.
  • Page 29 LED Assembly Access 1. Remove the four screws from the side trim. 2. Remove the four screws from the LED assembly cover. 3. Remove one screw from the insulation retainer to allow movement of the LED assembly. (Continued next page) –...
  • Page 30 4. Pull and rotate the LED assembly out from the body of oven. It is necessary to allow the insulation retainer to bow out for complete removal of the assembly. Glass Defective LED Assembly Replacement 1. Cut the wires close to the defective assembly. 2.

  • Page 31: Lock Assembly And Right Door Switch

    Lock Assembly and Right Door Switch Door Lock Assembly and Right Door Switch Access 1. Remove power to the unit. 2. Remove the control panel. 3. Open the doors and remove the four T20 Torx screws from the upper vent trim. NOTE: Both switch plungers must be depressed for proper cavity LED operation and locking for self-clean.
  • Page 32 Lock Assembly On the latch mechanism, the feedback switch signals the control board to run the cooling fan on high. When locked, LOCKED DOOR will remain illuminated in the display. The CAM on the assembly performs two functions: • Positions the lock hook into the door to prevent opening during the Clean operation. •...
  • Page 33 Cooling Fan Motor The cooling fan is used to maintain standard guidelines for external temperature, and preventing components from getting to critical temperatures that may cause premature failure. The fan will operate during any function, and will remain running after the cycle is complete until the oven sensor temperature drops below 170°F.
  • Page 34 FAD Board The FAD board replaces the older version of monitoring cooling fan operation. Previously it was thermally operated. The FAD board is a small sensor that provides speed feedback to the ERC. There are no resistance checks available for this board, only DC voltage checks. Check for DC supply voltage at the upper FAD board.

  • Page 35: Convection Fan Motor

    Convection Fan Motor NOTICE: If any damage occurs to the blade upon removal, REPLACE the blade as it is critical to proper operation. The Convection Fan Motor moves heated air throughout the oven cavity. To replace the Convection Fan Motor, begin from inside the oven cavity with the following steps. Convection Fan Motor Removal •...

  • Page 36: Oven Sensor

    Oven Sensor The Oven Sensor is located on the broil unit mounting plate, and secured with one T20 Torx screw and tab. Sensor Resistance @ F° – 36 –...

  • Page 37: Elements

    Elements Hidden Bake To enhance oven cleanability and bake element longevity, all wall ovens have hidden bake elements. Hidden Bake (All Ovens) Removal 1. Disconnect power to the oven. 2. Safely remove the oven from the cabinet installation. 3. Remove the rear wire cover. 4.
  • Page 38 7. Remove the insulation strip to access the two T20 Torx screws. 8. Remove the screws and the bake unit cover will pull bake element out. REVERSE PROCEDURE TO REINSTALL THE BAKE ELEMENT. Broil Broil Element Removal 1. Remove one T20 Torx screw from the oven sensor, pull the wire through and disconnect. 2.
  • Page 39 Convection Element Convection Element Removal 1. Remove the six T20 Torx screws from the convection cover. 3. Remove the four T20 Torx screws that are securing the element. 4. Pull the element forward and remove the wires. REVERSE PROCEDURE TO REINSTALL THE CONVECTION ELEMENT. (Continued next page) –...
  • Page 40 L2 High Limit Switch A safety thermostat is used in the event of a thermal runaway (example: welded relay contacts). It will open the L2 circuit to all the elements. It is a “one shot” thermostat and will have to be replaced once opened. OVEN MUST BE REMOVED FROM INSTALLATIONS TO REPLACE L2 HIGH LIMIT SWITCH.
  • Page 41 Gasket Gasket attaches to the oven front frame and is held in place with pins. To replace the oven gasket, start with the lower left corner. Locate the two pins close to the overlap that are about 1 3/4 in. apart. One pin will start on the farthest left bottom hole. The next pin will be the lowest left Gasket Spacing Front Frame Gasket Reinstallation...

  • Page 42: Door Mechanism

    Door Mechanism The French Door mechanism consists of inner door panels with a shaft and sprocket assembly, a chain assembly with turnbuckles and turnbuckle locking nuts. The turnbuckles are adjusted to provide proper door opening/closing force and are used to align the center seal to ensure complete door sealing between the Both doors operate together and a spring tensioned roller completes the door mechanism, providing positive door closure.

  • Page 43: Using The Force Gauge

    Using the Force Gauge Prior to doing any repairs on the French Door models, it is important to note the force required to move the as it was when the repair was started. A gauge will come with the chain assembly and inner door panel assemblies.
  • Page 44 Keep the gauge perpendicular to door. Record maximum force registered. In this example, 5 lb is the maximum measured. – 44 –...

  • Page 45: Chain Replacement

    Chain Replacement If chain replacement is necessary, follow these steps. NOTE: Doors must be in the closed position when reinstalling chain. Chain Assembly Removal 1. Remove power to the unit. 2. Remove the two T20 Torx screws securing the control panel. the control panel aside.

  • Page 46: Chain Adjustment

    Chain Adjustment Adjustment of either turnbuckle will move both doors at the same time. One door will move inward while the opposite door moves outward. The right door should close slightly ahead of the left door. CAUTION: Improper chain tension, through turnbuckle adjustment, can result in a burn hazard. To prevent this hazard, ensure the door moving force is between 3.5 and 5.0 lbs.

  • Page 47: Replacing Inner Door Liner Assembly

    Replacing Inner Door Liner Assembly NOTE: Before replacement of the inner door panels, use the force gauge (included with the part) to measure the pull force on either door. Record this force and use as a guide when adjusting the chain turnbuckles to maintain the consumer’s satisfaction with door operation.
  • Page 48 8. Loosen the 7/16 in. turnbuckle locking nut, and continue to move the locking nut until it reaches the end of the threads. Using a 1/2 in. open end wrench, loosen and unscrew the turnbuckle and remove the chain end. Once free of the rod, limit movement of the chain and rod for ease of reinstallation. 9.
  • Page 49 – 49 –...

  • Page 50: Reinstallation Of Door Assembly

    Reinstallation of Door Assembly 1. Slide the lower door shaft into the lower bearing. 2. Slide the middle bearing into the bearing holder. NOTE: Bearing is keyed for the holder. 3. Slide the upper bearing over the shaft and into the upper bearing holder. 4.

  • Page 51: Door Height And Angle Adjustment

    Door Height and Angle Adjustment DOOR ADJUSTMENT MECHANISM The door adjustment mechanism is located on both the right and left doors at the bottom hinges. Only the left side adjustment mechanism is shown in this manual. 1. Using a 9/16 in. socket wrench, tighten the Horizontal Adjustment Screws vertical adjustment screw to adjust door up, and loosen to adjust the door down.

  • Page 52: Element Operation

    Element Operation OVEN CIRCUITS NOTE: • BAKE element and BROIL • ASSIST element (1000W) can be on at the same time. • PREHEAT: Bake and broil • assist element (outer) followed by broil element (inner) and broil assist element (outer). There is no dead time between units during Preheat.

  • Page 53: Fault Codes

    Fault Codes ERC FAILURE CODES FIRST SECOND DESCRIPTION DESCRIPTION WHAT SERVICE CAN DO TO CORRECT THE FAULT NIBBLE NIBBLE(S) A climb in Upper Oven temperature to above the “Error Unlock Temperature” (EEPROM Most likely, there is at least 1 welded relay, and the control with the welded relay needs to parameter), while the latch input is false (door is not locked) be replaced Upper Oven temperature climbs above the “Error Lock Temperature”...

  • Page 54: Service Test Mode

    Service Test Mode • • the control shall enter the Engineering Test Mode. • Upon entry, the display shall display "test". • The display shall show current RTD temperatures. • to allow for testing the functionality at the unit level. •...

  • Page 55: Dc Circuits - Zet1F

    DC Circuits – ZET1F PT.NO. 229C6152P005-4 DOOR POSITIONS (DOORS CLOSED) PULSE LOCK UPPER MACHINE CONTROL W 5V UPPER PR FAD PR LED POWER BOARD J900 BK GND BK SUPPLY BOARD RTD 1080 @ ROOM TEMP W+BK LEFT LED RIGHT LED J300 MEAT PROBE -50K...

  • Page 56: Ac Schematic - Zet1F

    AC Schematic – ZET1F PT.NO. 229C6152P005-4 WIRING DIAGRAM WARNING: POWER MUST BE DISCONNECTED BEFORE SERVICING THE APPLIANCE K203 R234 J102 K207 BROIL 3300W (17.4 HIGH LIMIT K202 BAKE SWITCH OPEN: 177C 2850W (20.2 K206 CONV.BAKE J803 2400W (24.0 MACHINE K204 CONTROL BROIL ASSIST J804...

  • Page 57: Wiring Diagram - Zet1F

    Wiring Diagram – ZET1F J202 J200 J201 J201 FERRITE FILTER O+W1 J700 J300 W+BK1 K204 K207 K203 K206 K202 BROIL CONV BAKE J101 J900 J804 J102 J803 J801 GROUND TO AIR DIVIDER GY+BK1 GY+BK1 BK+W1 BLOWER R+W1 W+BK1 PR+Y1 GROUND TO TOP RETAINER O+W1...

  • Page 58: Dc Circuits - Ct9070

    DC Circuits – CT9070 PT.NO. 229C6152P003-4 DOOR POSITIONS (DOORS CLOSED) PULSE LOCK UPPER MACHINE CONTROL W 5V UPPER PR FAD PR BOARD J900 BK GND BK RTD 1080 @ ROOM TEMP W+BK J300 MEAT PROBE -50K @ ROOM TEMP J700 FERRITE FILTER Y ZERO CROSS 5V PULSE...

  • Page 59: Ac Schematic - Ct9070

    AC Schematic – CT9070 PT.NO. 229C6152P003-4 WIRING DIAGRAM WARNING: POWER MUST BE DISCONNECTED BEFORE SERVICING THE APPLIANCE K203 R234 J102 K207 BROIL 3300W (17.4 HIGH LIMIT K202 BAKE SWITCH OPEN: 177C 2850W (20.2 K206 CONV.BAKE J803 2400W (24.0 MACHINE K204 CONTROL BROIL ASSIST J804...

  • Page 60: Wiring Diagram - Ct9070

    Wiring Diagram – CT9070 J202 J203 J200 J201 J201 FERRITE FILTER J700 O+W1 J300 W+BK1 K204 K203 K207 K206 K202 CONV BAKE BROIL J101 J900 J102 J803 J804 J801 GROUND TO AIR DIVIDER BK+W1 BLOWER GY+BK1 GY+BK1 R+W1 W+BK1 PR+Y1 GROUND TO TOP RETAINER...
  • Page 61 CT9070 ZET1F BLOCK TERMINAL LATCH ASM BLOCK TERMINAL PROBE MEAT ASM LATCH ASM LAMP HALOGEN PROBE MEAT ASM SENSOR ASM BOARD LED ELEMENT BAKE SENSOR ASM SWITCH HIGH LIMIT ELEMENT BAKE FAN CONVECTION SWITCH HIGH LIMIT ELEMENT CONVECTION FAN CONVECTION ELEMENT BROIL ELEMENT CONVECTION BOARD UI KNOB (TEMP)

  • Page 62: Index

    Index Symbols 12 hour Shutoff 18, 23 Oven Controls 15, 20 Auto Recipe Conversion 17, 18, 22, 23 Proof 15, 19, 20, 52 bake element 37, 38 Rating 10 bearing 42, 47, 48, 50 Remote Enable 16, 21 Broil Element 7, 8, 38 Broiler Pan 10 Sabbath 17, 19, 22 Schematic - CT9070 59...

  • Page 63: Warranty

    This warranty is extended to the original purchaser and any succeeding owner for products purchased for home use within the USA. If the product is located in an area where service by a GE Authorized Servicer is not available, you may be responsible for a trip change or you may be required to bring the product to an Authorized GE Service location for service.

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