Erc Failure Codes - GE PT920 Technical Service Manual

ERC Failure Codes

Failure Codes are accessed by pressing and holding the
HOME and OPTIONS keys simultaneously for 3 seconds.
The LCD screen will show the last 7 failure codes logged
by the system. For a double wall oven, failure codes for
each cavity are displayed independently on the screen.
The clear KEY at the bottom of the screen can be pressed
to clear the failure code log.
• The F codes are stored in nonvolatile eeprom
memory. They do not show on the display for the
customer.
• The last 7 F codes can be recalled by pressing
together the HOME and OPTIONS keys for 3 seconds.
• All F codes are suppressed.
FAILURE
MEANING
CODE
F2 Oven temperature
inside oven cavity as
measured by sensor
over 650°F unlatched or
915°F latched.
F3
Open oven sensor
(over 2900 Ω)
F4
Shorted oven sensor
(under 950 Ω)
F7 Shorted key
F8
EEPROM data shift
failure
F9
Cooling fan stalls or
other cause of open
thermal switch
CX
Communication Error
C1 Communication Fail
with Upper Relay Board
Communication Fail
C4
with Lower Relay Board
FC Door Latch Error
• Welded relay contacts on the relay board.
• Airfl ow to rear of unit.
• High resistance in oven sensor leads and/or connectors (especially at
sensor in rear).
• Disconnect power. Disconnect sensor harness from control. Measure sensor
resistance (white leads) to be 1080 Ω at room temperature with 2 Ω per
degree change.
• Look for damaged harness terminals if not a bad sensor.
• Disconnect power. Disconnect sensor harness from control. Measure sensor
resistance (white leads) to be 1080 Ω at room temperature with 2 Ω per
degree change.
• Separate sensor from harness to determine fault.
Check logic display assembly. If rubber button pad is misaligned, correct;
otherwise, replace control.
If repeated, replace control.
Suspect stalled cooling fan or airfl ow to control area.
Check harness fi rst and then replace component indicated by Cx Error Code.
Inspect door latch and circuitry. Replace if switches are defective.
– 39 –
Last 7 Failure F- Codes :
Upper 7 Fcode Log
C1
F3
F7-S
F7-S
F7-S
F7-S
F7-S
Clear
All
CAUSE / CORRECTION
Lower 7 Fcode Log
F9
CX
F3
F3
CX
F3
CX