Testing Procedures; Servicing Information For Electronic Range Control (Erc); Testing Procedures "Quick Test" Mode For Electric Range Control - Amana ARC700 Service

Testing Procedures

Servicing Information for Electronic Range
Control (ERC)
The ERC operates in conjunction with a separate relay/
power supply circuit board, adaptor board and oven
temperature sensor(s) to control all bake, broil,
convection, and self clean functions.
The ERC is connected through an adaptor board to a
glass touch function panel to control minute timer, clock,
stop time, oven light, panel light, cancel, bake, cook time,
broil, convection bake, convection, convection broil, and
clean. Slew pads are used to set times and
temperatures.
The adaptor board serves as an interface between the
ERC and the glass control panel. A strobe pulse is sent
to the adaptor board where it activates an interrupt
routine in the adaptor board micro. The interrupt causes
the micro to look for a "touch" on the glass. If there is a
touch, the strobe pulse is duplicated and sent out on a
sense line to the ERC. A touch is determined by a
change of voltage at the pads on the glass created by
the body impedance bleeding off some of the charge on
the pad.
The ERC display consists of two digital readouts which
displays all timing functions, and all temperature
functions.
The separate relay/power supply circuit board consists of
eight relays for convection fan, oven light, panel light,
convection element, bake, broil, door lock, and double
line break operations controlled by the ERC, and a step
down transformer with two secondary windings which
convert 120 VAC input to filament voltage to power the
ERC display.
The oven temperature sensor is mounted in the oven
cavity and connected to the J4 connector on the rear of
the ERC. As the oven temperature increases, the
sensor resistance also increases. The ERC converts
this resistance change to a corresponding temperature
readout and to cycle the relay(s) to maintain the desired
temperature setting.
The ERC is also capable of sensing certain failure
conditions which can occur in the oven temperature
sensor(s), the self clean latch switch(es) the adaptor
board or the ERC itself. If the ERC senses a failure,
power will be removed from the relays, an alarm will
sound and a failure code will be displayed.
DISCONNECT POWER BEFORE SERVICING, UNLESS TESTING REQUIRES IT.
Each major component of the Electronic Range Control
system is serviced as a separate part. However, each
component and related wire harness must be tested prior
to replacing an individual component.
Testing Procedures
"Quick Test" Mode for Electronic Range
Control
Follow procedure below to use the quick test mode.
Entries must be made within 32 seconds of each other or
the control will exit the quick test mode. The quick test
mode cannot be reactivated until power is disconnected
from oven, and must be accessed within 5 minutes of
powering up.
1. Apply power to oven press and hold "cook time"
pad for 5 seconds.
2. Display will read the following:
Pad Response
Clean Double Line Break (DLB) on and
door lock status code displayed
Bake DLB and Bake on
Conv. Bake DLB, Bake and Conv Fan on
Convection DLB, Conv. Element and Fan on
Broil DLB and Broil on
Conv. Broil DLB, Broil and Conv. Fan on
Stop Time Panel light and beeper on; senor
temperature displayed
Cook Time Displays manufactures code and
sensor readings
Timer Displays dashes
Clock All display segments illuminated
Oven Light Oven light on
Panel Light Panel light and beeper on; senor
temperature display
Cancel Exit Quicktest
Slew Keys Sequences through display
segments with sensor temperature
displayed
21 RS2320001 Rev. 2