Amana RSS Operation And Service Procedures, Testing Procedures, Erc Failure Codes And Warnings

OPERATION AND SERVICE PROCEDURES

Electronic Range Control - ERC (Models w/One Piece Control)

controlled by the ERC, and a step down transformer with two (2) secondary windings which convert the 120 VAC input to 3.2 VAC filament voltage to power the ERC display and 20.3 VAC drive voltage which the ERC uses to turn on the bake and broil relays.

The oven temperature sensor is mounted in the oven cavity and is connected to the J2 connector on the rear of the ERC. As the oven temperature increases, the sensor resistance also increases. The ERC converts this resis- tance change to a corresponding temperature readout. The ERC then cycles the bake/broil relays to maintain the desired temperature setting.

The ERC is also capable of sensing certain failure condi- tions which can occur in the temperature sensor, the self- clean latch switch or the ERC itself. If the ERC senses a failure, power will be removed from the bake/broil relays, an alarm will sound, and a failure code will be displayed.

Each major component of the Electronic Range Control System (ERC, temperature sensor), and related wire har- ness must be tested prior to replacing the individual component.

TESTING PROCEDURES

"DISPLAY" MODE - All segments of the display can be checked by using the following sequence. NOTE: Clock must previously be set for the time of day.

1.Press and hold the "CLOCK" button until "TIME" is displayed and until "TIME" turns off.

2.Momentarily press "CANCEL" button until all display segments are lit. Following the lighting of all of the segments, the display will go through a "SALES DEMONSTRATION" mode, displaying individual func- tions. The "SALES DEMONSTRATION" mode will show: (1) "BROIL", three horizontal segments and the degree (°) symbol, (2) "OVEN", "TIME", and ":00",

(3) "CLEAN", "TIME", and "3:00", (4) "TIMER" and ":00", (5) time of day, (6) all segments and, (7) "BAKE", three (3) horizontal segments and the de- gree symbol. The program will continue to repeat until the "CANCEL" button is pressed. The time of day should then be displayed.

ERC FAILURE CODES AND WARNINGS

The Electronic Range Control is capable of detecting certain failures within the ERC, the oven temperature sensor and the self-clean latch switch.

display include F1 through F8, "DOOR" or "LOCK". A brief description of the failure codes and warnings is listed below:

F1 - Indicates a failed component in the ERC.

F2 - Sensor resistance too high. Check sensor resistance, wire harness, and connections.

F3 - Open wire lead in sensor harness, bad harness/ sensor connections, or sensor resistance too high (above 3300 ohms).

F4 - Sensor resistance too low (below 500 ohms). Check for a short in sensor wire harness and check sensor resistance.

F5 - Indicates a failed component in the ERC.

F6 - Indicates a failed component in the ERC or due to fluctuations in 60 HZ power source.

F7 - Indicates a shorted or sticking contact in one or more of the function control switches. Make sure the function buttons are not binding on the control panel glass - reposition the ERC and/or glass. Make sure the function buttons spring outward after being de- pressed.

F8 - Indicates a failed component in the ERC.

F9 - Door Latch Supervisory (Door latched):

Sounds alarm and resets control to non-cook mode if the door latch supervisory logic fails for a sample period of 2 seconds (while the door is latched). Unlatching the door (if not locked) and Cancel Key may reset the display code and audible. If the door is locked (temp > 500°F) power must be removed until the oven door can be unlatched.

"LOCK" LIGHT ON - If "LOCK" appears in the display when the oven is not set in clean mode, indicates a defective latch switch or shorted wire lead from the ERC pin J2-4 or door is latched.

"DOOR" APPEARS IN DISPLAY IN BAKE/BROIL MODE

-This is an indication of a defective latch switch or a shorted wire lead from the ERC pin J2-4 to ground, or door is latched.

"DOOR" APPEARS IN DISPLAY DURING CLEAN MODE

-This is an indication of a defective latch switch or an open wire lead from the ERC pin J2-4 to ground, or the door latch has not been closed as required to initiate the clean cycle.

ELECTRONIC RANGE CONTROL TEMPERATURE CALIBRATION

The ERC incorporates ± 35°F. calibration capabilities. Follow the procedures below to calibrate the ERC:

The failure codes and warnings which may appear on the 1.	Press and release the "BAKE TEMP." function but-
	ton.
49	RC231002 Rev. 3