GE JK1000, Technical Service Manual

Page: 28 / 89

28
GE Title or job number
11/26/2013
SERVICE MODE - Machine Control
This mode will be used by any number of people for many different tasks.
Possibilities include: factory workers to troubleshoot units that failed the End
of Assembly Line Test, engineers during the development of a new oven and/
or platform, and field service technicians to root-cause problems in consumers’
homes.
A 5-minute timer shall be activated at power-up which is transparent to the user
and during this time, the Service Mode shall be entered by pressing and holding
the “1” and “5” keys simultaneously for 3 seconds
When the Service Mode is entered, the word “tESt” shall appear in the time
digits until it is superseded by the CRC or Software version or until the mode is
canceled.
If a user presses the CLEAR/OFF key, the mode shall be canceled and the control
shall reset.
When the Service Mode is entered, the current RTD temperature shall appear in
the temperature digits of each oven.
When the Service Mode is entered, different keys shall be used to test different
relay outputs.
The Upper and Lower oven keys, on a double oven shall be used to alternate the
oven which the mode keys activate. If the upper or lower keys have not been
pressed, the control shall assume that it is the upper oven.
Each key press shall turn on the associated load. Each load shall turn off when
one of the following conditions is met: the same key is pressed again; another
key has been pressed; or 10 seconds has passed after the key has been released.