Monogram ZGP486ND Mode D'emploi page 2

REED SWITCH
The reed switch is located at the top rear of the range, behind the
cooling fan. To replace it, remove the range back, cooling fan duct
and finally the cooling fan. This switch monitors the presence of
the airstream from the cooling fan. If the fan malfunctions, the reed
switch will disable the oven.
Reed Switch
Lock-Out
Valve
Convection
Fan
Gas
Regulator
Gas Range Shut-Off
MOTORIZED DOOR LOCK
The motorized door lock assembly is located above the oven. The
assembly consists of a lock motor cam and switch assembly, lock
hook, mounting plate, door switch, spring and plunger.
Motorized Door Lock Operation:
The lock motor is en er gized when the control is set for Clean and
Clean Time selected. The K13 relay contact will close and complete
the circuit that supplies the voltage to the lock motor.
NOTE: To enable proper operation
Door Locking or Unlocking
of the door lock, ensure that the
LOCK RELAY
L LOCK N
door jamb switch is in "common" to
MOTOR
C MDL
"normally closed" (door closed). This
enables power to be delivered when
the door lock closes.
• CAM – The cam on the motor per forms two
func tions:
1. Positions the lock hook in the door to prevent
opening during the Clean op er a tion.
2. Operates the lock switches which tell the con-
trol if the door is unlocked or locked and ready
for the Clean operation.
NOTE: When the door is either being locked or unlocked, both the lock
and unlock switches will be in the open position. The LOCKED AND
UNLOCKED diagrams are representative of a single oven. On double
oven models, the diagrams apply to both models, except for the pin
position (see OVEN SENSOR AND LOCK SWITCH OHMMETER TEST sec-
tion for reference to double ovens).
UNLOCK
UNLOCK
P B
P B
4
J16 P Y
P Y
3
LOCK
LOCK
P
1
J17
UNLOCKED
LOCKED
LOCKED DOOR REMOVAL
If the door is locked and cannot
be unlocked, it may be removed
for service by removing the lock
motor plate screws between
the control panel and door.
The lock motor assembly is then free
to slide forward as you open the door.
Cooling
Fan
OVEN SENSOR AND DOOR SWITCH OHMMETER TEST
See the MOTORIZED DOOR LOCK section for door switch
functionex pla na tion. Remove power from the oven. Make the
resistance meas ure ment from the side of the sensor and lock switch
connectorwith the exposed terminals.
DOUBLE OVEN
CIRCUIT TERMINALS OHMS
Oven Sensor A 1 to 2 1091W @ Rm Temp.
Oven Sensor B 3 to 4 1654W @ 350°F
Main Logic Board J5 2634W @ 865°F
Door Latched 1 (J17) to 3 (J16) 0W
Relay Board 1 (J17) to 4 (J16) open
Door Unlatched 1 (J17) to 4 (J16) 0W
1 (J17) to 3 (J16) open
A
Large Oven
B
Small Oven
A
Large Oven
B
Small Oven
NOTE: If an abnormal reading is observed, wiggle the leads at the
dis con nect block. If there is any variation, replace.
RELAY BOARD ACCESS
The Relay Board is located on the
range back. Access it by removing the
1/4" hex screw from the edge of the
trap door with a ratchet driver or short
screwdriver. Remove the trap door and
lift the insulating paper covering the
relay board to access.
4
J16
3
P FACTORY TEST MODE
1
J17
The factory test mode can only be accessed during the first few
seconds after the unit is powered up. To access the factory test
mode, press and hold the Mini-Knob button within the first seconds of
power-up. The options of the factory test mode are cycled through by
pressing the Timer button.
To exit the factory test mode, hold the Mini-Knob button for 3
seconds.
OVEN BURNER IGNITION SYSTEM
The ignitor is a "Norton" style rectangular glowbar. The ignition circuit
consists of the thermostat, the igniter, and the oven safety valve (gas
valve). The three components are wired in a series.
The most important points to know about the ignition system are:
1. THE IGNITOR RESISTANCE DECREASES AS THE IGNITER SURFACE
TEMPERATURE INCREASES.
2. THE SAFETY VALVE OPERATES BY CURRENT, NOT VOLTAGE.
Remove lock
From a cold start, the ignitor needs 20-60 seconds, with voltage
motor plate screws
applied, to reduce its electrical resistance flow in the series circuit.
between control
This is the required current flow needed for the safety valve to open
panel and door.
to supply gas to the burner. The glowbar should provide a steady
current flow between 3.2 and 3.6 amps flowing in the circuit. The
igniter will remain energized at all times during burner operation. If
the igniter glows red but does not draw at least 2.9 amps, the fault is
usually with the igniter, not the valve. Always check the oven shut-off
valve for a "No Oven" condition.
OVEN SENSOR AND LOCK
SWITCH CONNECTOR
W
P
SAIL SWITCH
B
P
IGNITER GLOWBAR REPLACEMENT
DOOR UNLOCK
The igniter glowbar and it's protective cage are one assembly on
Y
P
this Norton style igniter. The round Carborundum igniter CANNOT be
DOOR LOCK
substituted for the rectangular Norton Igniter.
S
P • Remove the burner from the oven. (See "Bake Burner Removal in
DOOR STATUS
the Installation Instructions).
• Remove the 1/4" hex head screw securing the igniter to the burner.
J16
• Remove the old igniter.
1 5
• Install the new igniter and re-install the two 1/4" hex head screws
RELAY
J17
to secure the igniter.
BOARD
1 9
• Re-install the burner.
CONVECTION FAN ASSEMBLY
The Convection Fan Assembly is located on the back wall of the oven
liner behind the panel with the screen in the center.
NOTE: On double oven models, the racks and rack supports will need
to be removed to access the fan
assembly on the small oven.
TO SERVICE FAN:
The fan blade and convection fan
motor can be replaced from inside
the oven.
LOCKOUT MOTOR DIAGNOSTICS
The motorized gas lockout valve assembly is located on the back of
the range. The assembly consists of a lock motor, cam and switch
assembly, gas valve and mounting plate.
Trap Door/
Relay Board
Motorized Cooktop Lockout Valve Operation:
The lock motor is energized when the control is set for Clean and
Clean Time selected. The K10 relay contact will close and complete
the circuit that supplies the voltage to the lock motor.
NOTE: To enable proper operation of the gas lockout valve, ensure
that all the gas surface burners are in the OFF position. This enables
power to be delivered when the gas lockout valve closes.
• CAM – The cam on the motor operates the lock switches which tell
the control if the gas valve is open or closed locked and ready for the
Clean operation.
NOTE: When the gas valve is either being locked or unlocked, both
the lock and unlock switches will be in the open position.
ERC FAILURE CODES
The last 7 Failure (F) codes are stored in the nonvolatile memory,
accessed through the factory test mode. All Failure (F) codes
are suppressed from the display, except F2 and F9. To access
the last 7 F-codes, follow these steps:
1. Enter the factory test mode by holding the Mini-Knob button
during power-up.
2. Press the Timer button to cycle through the factory test mode
options.
3. Find the F-code menu. The display will show "F-co".
4. Press the Mini-Knob button to enter this menu.
5. Press the Mini-Knob button to cycle through F-codes. Press
the Timer button to return to the factory test mode main menu.
FAILURE
CODE MEANING CORRECTION
-F2- Oven temperature
• Welded relay contacts
• Airflow to rear of unit
Inside oven cavity as measured by
• High resistance in oven sensor leads/con-
sensor over 650°F unlatched or 915°F
nectors (especially at sensor in rear)
latched
-F3-
Open oven sensor • Disconnect power. Disconnect sensor harness from control.
(over 2900 ohms) Measure sensor resistance (white leads) to be 1080 ohms at
room temperature with 2 ohms per degree change.
• Look for damaged harness terminals if not a bad sensor.
Shorted oven sen- • Disconnect power. Disconnect sensor harness from control.
-F4-
sor (under 950
Measure sensor resistance (white leads) to be 1080 ohms at
ohms)
room temperature with 2 ohms per degree change.
• Separate sensor from harness to determine fault.
-F6- RANGE LOCKOUT Check connections on lockout motor and CN6 of control.
Switch issues
-F7- Shorted key Check logic display assembly. If rubber button pad is misaligned,
correct; otherwise, replace control.
-F8- EEPROM data shift failure
-F9- Cooling fan stalls or other cause of open sail
switch
Communication Error
-CX-
-C1-
-C4-
-FC- Door Latch Error
SPECIAL FEATURES
(Oven Thermostat Offset and Sabbath)
Push and hold the Timer button and Mini-Knob at the same time
for 4 seconds until the display shows "SF" (Special Features).
Turn the Mini-Knob counterclockwise to access the oven thermostat
offset mode. Press and turn the Mini-Knob to adjust the temperature
Fan
Motor offset from +35°F to –35°F. This only affects bake, convection bake
and convection roast.
Fan Cover
Turn the Mini-Knob clockwise to access the Sabbath mode.
Press the Mini-Knob to select.
CONTROL VOLTAGE
NOTE: Temperature and Mode Selection
TERMINALS VOLTAGE
necessary for op era tion of Relay contacts.
L1-N 120 VAC ALL THE TIME
NOTE: Voltage must be present across
terminals L1 to N for control to operate.
GROUNDING SPECIFICATIONS
Ground Path Resistance 0.10W
Insulation Resistance 250KW
If repeated, replace.
Suspect stalled cooling fan or air-
flow to control area.
Check harness first and then
replace component indicated by
Cx Error Code.
Inspect door latch and circuitry.
Replace if switches are defective.
Max.
Min.