Service Mode - GE JS998 Series Technical Service Manual

Service Mode

The service mode allows the service technician to
make adjustments and run several important
tests on critical oven components.
To enter the service mode:
1. Disconnect main power to the oven for at
least 15 seconds.
2. Reconnect power and enter
keypanel within 5 minutes after the control
initializes. The SPECIAL MODES screen is
displayed.
3. Press the SERVICE pad on the SPECIAL
MODES screen. The SERVICE MODE
screen is displayed.
4. Press the NEXT and BACK pads to scroll
through the test list. Choose a test by
pressing the appropriate pad.
Service Mode Tests
COOKING LOADS - Verifies proper operation of
cooking elements and convection fan. (See
Troubleshooting Cooking Loads in Service
Mode to perform tests.)
Note: There is a 5 second delay in the electronic
control activating cooking loads in service mode.
DOOR LATCH - Verifies proper operation of door
lock motor and switches. Press the LOCK pad: a
red lock icon in the display flashes during
transition from unlock to lock, then becomes solid
on when the door is locked. Press the UNLOCK
pad: the red lock icon flashes during transition
from lock to unlock, then turns off when the door
is unlocked.
DOOR POSITION - Verifies proper operation of
door sense switch. Open and close the oven
door: the Time/Temperature display indicates the
door is open or closed.
RTD - Displays oven sensor temperature in red
on Time/Temperature display of the control panel.
VENT FAN - Verifies proper operation of the
ventilation fan. Press the ON and OFF pads to
cycle the fan. The Time/Temperature display
indicates the fan is ON or OFF.
MAG TAP - Forces the control to use either the
208 or 240 volt tap on the high voltage
transformer. DO NOT use this service feature at
this time. Allow the control to select the
transformer voltage.
R COOLING FAN - Verifies proper operation of the
right cooling fan. Press the ON and OFF pads to
cycle the fan. The Time/Temperature display
indicates the fan is ON or OFF.
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on the
L COOLING FANS - Verifies proper operation of
the mag cooling fan, HVT fan and mag stirrer fan
(Wall Ovens) or the Left Cooling fan (Slide-in
range). Press the ON and OFF pads to cycle the
fan. The Time/Temperature display indicates the
fan is ON or OFF.
OVEN LIGHT - Verifies proper operation of oven
light. Press the pads ON and OFF to cycle the
light. The Time/Temperature display indicates the
light is ON or OFF.
OFFSET - To adjust the oven calibration offset in
bake mode. Press the INCREASE or DECREASE
pads to change the cooking temperature in 1°
increments up to ±35°F. Press the CONFIRM pad
to set.
DISPLAY - Verifies operation of display segments.
Press the ON and OFF pads to cycle the display
test. Press the CLEAR/OFF key to return display
to normal.
KEYS - Verifies proper operation of keypanel.
Press the number pads on the keypanel to test.
Each number appears in the Time/Temperature
display as the corresponding pad is pressed.
LINE VOLTAGE - Displays line voltage L1-L2 in
the upper temperature display.
F CODES - Displays up to last 7 ERC failure
codes. Note: Always check failure codes, then
clear them.
COOKTOP STAT (Slide-in range) - Indicates the
ON/OFF status of the radiant surface elements.
The ON indication will occur when the respective
infinite switch hot light is lit.
CO SENSOR (Kenmore models only) - Turns the
CO sensor and heater on and off.
Press the EXIT pad to return to the home screen.
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