GE JKP18 Series, Техническое обслуживание руководство

Страница: 23 / 70

– 21 –
ERC Failure Codes
The oven may stop operating but not give an F-
code on the display immediately. F-codes are
stored in nonvolatile EEPROM until 2 identical
faults occur consecutively. After that, the F-code
will be displayed. They can be recalled by pressing together: TIMER, CLOCK, MIN DOWN or 9. While
displayed, pressing MIN UP or 8 and HR DOWN or
6 together will clear them. A fault must exist
continuously for 5 minutes before an F-code is
recorded (F2, F8 are sooner).
F A I L U R E
CODE
Determine if problem is with Key Panel or Control by disconnecting ribbon cable and
measuring flat cable pins 13-14. Should be open. Should be 100-150 ohms while
pressing OFF key.
F 2
• Welded relay contacts
• Cooling fan stalled or blocked
• Air flow to rear of unit
• High resistance in oven sensor leads/
connectors (especially at sensor in rear)
Shorted OFF key
F0
Over temperature
F3
• Disconnect power. Disconnect sensor harness from
control. Measure sensor resistance (white leads) to be
~1080 ohms at room temperature with 2 ohms per deg
change.
• Look for damaged harness terminals if not a bad
sensor.
Open oven sensor (Over
2900 ohms)
Shorted oven sensor (under 950
ohms)
F4 • Disconnect power. Disconnect sensor harness from
control. Measure sensor resistance (white leads) to be
~1080 ohms at room temperature with 2 ohms per deg
change.
• Separate sensor from harness to determine fault.
Shorted matrix or START key F7
Determine if problem is with Key Panel or Control by
disconnecting ribbn cable and power up control. If no F
code problem is with key circuit.
F8 EEPROM data shift failure. If repeated, replace control.
F9 Cooling fan stall while oven above 650°F. open
thermal switch in yellow leads
Cooling fan or air flow to control area.
CORRECTION
MEANING
1. Inside oven cavity as measured by sensor over 650°F
unlatched or 915°F latched
2. Cooling fan stall while oven above 650°F-open thermal
switch in yellow leads.
Sensor Circuit supervisor Failure
F5
Replace Control.
Models ZEK957, JKP56, JKP45, JCKP18, and JKP18
F A I L U R E
CODE
Determine if problem is with Key Panel or Control by disconnecting ribbon
cable and measuring flat cable pins 13-14. Should be to probe side with
conductor . Should be 125-1750 ohms while pressing OFF key.
F 2
• Welded relay contacts
• Cooling fan stalled or blocked
• Air flow to rear of unit
• High resistance in oven sensor leads/
connectors (especially at sensor in rear)
Shorted OFF key F0
Over temperature Inside oven cav-
ity as measured by sensor over
650°F unlatched or 915°F latched.
F3 • Disconnect power. Disconnect sensor harness from
control. Measure sensor resistance (white leads) to be
-1080 ohms at room temperature with 2 ohms per deg
change.
• Look for damage harness terminials if not a bad
sensor.
Open oven sensor (over
3000 ohms)
Shorted oven sensor (under 950
ohms) F4
• Disconnect power. Disconnect sensor harness from
control. Measure sensor resistance (white leads) to be
~1080 ohms at room temperature with 2 ohms per deg
change.
• Seperate sensor from harness to determine fault.
Shorted matrix or START key F7
Determine if problem is with Key Panel or Control by
disconnecting flat cable and measuring cable pins using
pinout chart. Allow up to 1000 OHMS when pressing a
k e y .
F8 EEPROM data shift failure. If repeated, replace control.
F9
Cooling fan stall or other cause of
open thermal switch in yellow latch
leads. Suspect cooling fan (between ovens) or air flow.
CORRECTION
MEANING
Sensor Circuit supervisol Failure F5
Replace Control.
Models JKP27, JCKP15, JKP15, JCKS05, and JKS05