– 27 –
Models JCK915, JCT915, JK915, JT915, JK955, JT955, ZEK938, ZET938, ZEK958, and ZET958
Model JT912
<300
Ω
while pressing OFF key.
FAILURE
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.
F2
• Welded relay contacts
• Cooling fan stalled or blocked
• Airflow to rear of unit
• High resistance in oven sensor leads/
connectors (especially at sensor in rear)
Shorted OFF key
F0
Oven 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 degree 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 degree 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 ribbon 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 stalls while oven
above 650°F—open thermal
switch in yellow leads
Cooling fan or airflow to control area.
CORRECTION
MEANING
1. Inside oven cavity as measured
by sensor over 650°F unlatched
or 915°F latched
2. Cooling fan stalls while oven
above 650°F—open thermal
switch in yellow leads
Sensor circuit supervisor
failure
F5
Replace control.
switch in yellow or blue latch leads.
FAILURE
CODE
MEANING
CORRECTION
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.
-F2-
1. Inside oven cavity as measured by
sensor over 650°F unlatched or 915°F
latched, or
2. Cooling fan stalls while oven above
650°F—open thermal switch in yellow
leads
• Welded relay contacts
• Cooling fan stalled or blocked
• Airflow 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 degree
change.
• Look for damage harness terminials 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 degree 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 ribbon cable and measuring flat cable using
pinout chart. Allow up to 1000 ohms when pressing a key.
-F8-
EEPROM data shift failure
If repeated, replace control.
-F9-
Cooling fan stalls while oven above
650°F—open thermal switch in
yellow leads
Cooling fan or airflow to control area.
-FF-
Loss of latch motor safety circuit
Replace control.
OFF key.
<300
Ω
while pressing
2 - 11.
or open short.
yellow or blue leads.
Summary of Contents for JCKSO6
Page 39: ...37 Models JCK915 JK915 and ZEK938 Schematic Schematics and Wiring Diagrams...
Page 40: ...38 Models JT952 JT955 and ZET958 Schematic...
Page 41: ...39 Models JK955 and ZEK958 Schematic...
Page 42: ...40 Model JTP20 Schematic...
Page 43: ...41 Models JT912 JTC915 JT915 and ZET938 Schematic...
Page 44: ...42 Models JCKP20 and JKP20 Schematic...
Page 45: ...43 Models JCKS06 and JKS06 Schematic...
Page 46: ...44 Model JTP28 Schematic...
Page 47: ...45 Model JKP28 Schematic...
Page 48: ...46 Models JKP48 and JTP48 Schematic...
Page 49: ...47 Model JT965 Schematic...
Page 50: ...48 Model JTP86 Schematic...
