GE JS998 Series User Manual

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Troubleshooting Cooking Loads in Service Mode
Cooking loads (bake, broil, convection elements and convection fan) can be energized individually
through the service mode (press the key next to COOKING LOADS, then appropriate load).
Note: There is a 5-second delay in the electronic control activating cooking loads in service mode.
When the appropriate load is turned on in the service mode, first verify that the element is heating or the
fan is turning. If load is not energized, check AC relay voltages according to the second column in the
following tables:
Note: Oven must be in the service mode for proper reading. DC voltages are read between the
reference pin in the table and ground. See note below table.
AC VOLTAGES
SERVICE MODE
Function
Main Pwr Board Relay
ON=120VAC (L1-N or L2-N)
or 240VAC (L1-L2)
OFF=0V
Relay Control
ON = 0Vdc
OFF = 12Vdc
Relay Control
ON = 4.6Vdc
OFF = -14Vdc *
Enable = 4.2Vdc
Disable = -14.0Vdc
Notes
L2 = J4-8 (K1-NO)
MPB J1-10
MLB J3-10
N = J103
L2 = J4-7 (K5-NO)
MPB J1-9
MLB J3-9
N = J103
L1 = J4-5 (K13-NO)
MPB J1-4
MLB J3-4
N = J103
HVT T2 = L2 = J107 (K9-NO)
OR
HVT T3 = L2 = J105 (K9-NC)
MPB J1-17
MLB J3-17
OR
MPB J1-17 OFF
MLB J3-17 OFF
MPB J1-1
MLB J3-1
HVT T1 = L1 = J114
L2 = J4-9 (K106-NO)
MPB J1-3
MLB J3-3
N = J103
L1 = K10-NO
MPB J1-8
MLB J3-8
MPB J1-1
MLB J3-1
L2 = K102-NO (DLB)
MPB J1-12
MLB J3-12
L1 = J4-2 (K105-NC)
MPB J1-16 OFF
MLB J3-16 OFF
N = J103
L1 = J4-3 (K105-NO)
MPB J1-16
MLB J3-16
N = J103
L1 = K7-NO
MPB J1-6
MLB J3-6
MPB J1-1
MLB J3-1
L2 = K11-COM (DLB)
MPB J1-11
MLB J3-11
L1 = K8-NO
MPB J1-7
MLB J3-7
MPB J1-1
MLB J3-1
L2 = K11-COM (DLB)
MPB J1-11
MLB J3-11
L1 = J113 (K103-NO)
MPB J1-18
MLB J3-18
MPB J1-1
MLB J3-1
L2 = K11-COM (DLB)
MPB J1-11
MLB J3-11
L1 = J4-1 (K2-COM)
MPB J1-14
MLB J3-14
N = J103
Note: Ground reference for dc volta
g
e measurements
MPB = Main Power Board * OFF = 0Vdc if Disable = -14Vdc
is J3-2 or J3-4 on MPB or J5-2 or J5-4 on MLB MLB = Main Logic Board
Right Cooling Fan
R CoolingFan -> On/Off
Left Cooling Fans
Mag Stirrer
Mag Fan
HVT Fan
L CoolingFans -> On/Off
Fan comes on when entering the
cooking loads menu.
Oven Light
Ovenlight -> On/Off
Microwave
CookingLoads -> MW
K6 (Mag Main Relay) must be energized
MPB J1-5 ON (4.6Vdc)
MLB J3-5 ON (4.6Vdc)
Note: MagTap is automatically selected
by Line Voltage
Door Latch
DoorLatch -> Lock/Unlock
Broil element must be turned off
Bake Element
CookingLoads -> Bake
Bake2 Element
CookingLoads -> Bake2
Broil Element
CookingLoads -> Broil
Broil element must be turned off
DC VOLTAGES
K4 (Convection Fan Relay) must be
energized
MPB J1-15 ON (0Vdc)
MLB J3-15 ON (0Vdc)
Convection Fan
Counter Clockwise
CookingLoads
-> ConvFan -> CCW
Convection Fan
Clockwise
CookingLoads
-> ConvFan -> CW
Vent Fan
VentFan -> On/Off
K4 (Convection Fan Relay) must be
energized
MPB J1-15 ON (0Vdc)
MLB J3-15 ON (0Vdc)
Convection Element
CookingLoads -> ConvElem
Fan comes on when entering the
cooking loads menu.
Fan comes on when entering the
cooking loads menu.
RELAY CONTROL TABLE - SINGLE WALL OVEN

GE JS998 Series Specifications

General

Brand	GE
Model	JS998 Series
Category	Oven
Language	English