GE PGS908 Technical Service Manual

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Contents

GE PGS908 Technical Service Manual Manual pdf 72 page image

– 72 –FailureCode Meaning Correction-F0- Shorted OFF key(Membrane) or GT ErrorPerform glass touch board key panel test. Determine if problemis with key panel or control by disconnecting ribbon cable andmeasuring flat cable pins 13 to 14. Should be open. Should be 100-150 Ω while pressing OFF key.-F2- Over temperatureInside oven cavity asmeasured by sensor over600°F (315°C) unlatchedor 915°F (491°C) latched.Welded relay contacts•Cooling fan stalled or blocked•Airflow to rear of unit•High resistance in oven sensor leads/connectors (especially at•sensor rear)-F3- Open oven sensor (under950 Ω)Disconnect power. Disconnect sensor harness from control.•Measure sensor resistance (white leads) to be -1080 Ω at roomtemperature with 2 Ω per degree change.Look for damaged harness terminals if not a bad sensor.•-F4- Shorted oven sensor(over 2900 Ω)Disconnect power. Disconnect sensor harness from control.•Measure sensor resistance (white leads) to be -1080 Ω at roomtemperature with 2 Ω per degree change.Separate sensor from harness to determine fault.•-F7- Shorted matrix to STARTkeyDetermine if problem is with key panel or control by disconnectingribbon cable and measuring flat cable using pinout chart. Allow up to1000 Ω when pressing key.-F8- EEPROM data shift failure If repeated, replace control-F9- Cooling fan stalls whileabove 650°F (343°C);open thermal switch inyellow or blue leadsCooling fan or airflow to control area.-FF- Loss of latch motor safetycircuitReplace control.ERC Failure CodesThe ERC (electronic range control) has error (F) codes that can be utilized by the service technician in orderto quickly identify failed or improper operation of certain oven components. The oven may stop operatingbut not give an F code on the display immediately. A fault must exist continuously for 5 minutes before an Fcode is recorded (F2, F8 are sooner). F codes are stored in nonvolatile EEPROM memory until the same faultoccurs twice consecutively.F codes can be recalled by pressing together TIMER, CLOCK, MIN DOWN or 9. While F codes are displayed,pressing MIN UP or 8 and HR DOWN or 6 together will clear them. To exit failure code mode, press upperoven START pad.Note: If an "FO" failure code is displayed and the buttons do not work, disconnect power to the range.Wait 5 seconds then reconnect power to the range. Press the “Bake” and “Broil” keys simultaneouslyuntil “SF” appears in the display. (You are now in the Special Features function.) Press the “9” and “0” keyssimultaneously for 5 seconds. Wait until time of day is displayed. Press “1” and “5” keys simultaneously. Thedisplay will: go blank, briefly display all LED segments, briefly display “Loc rEF”, display all segments for 30seconds, and then display “LOC REF”. Then press “6” and “8” keys simultaneously and the control will displaytime of day. Verify control operation by pushing several keys at random to ensure they all work.When first plugged in, if all display segments illuminate for approximately 7 seconds, then Loc rEF appearsin the display, and none of the pads work, proceed to step #5 then #6.