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Error Codes
The electronic oven control has error (F) codes that can be utilized by the service technician in order to
quickly identify failed or improper operation of certain oven components. The oven may stop operating but
not give an F code on the display immediately. F codes are stored in nonvolatile EEPROM memory until the
same fault occurs twice consecutively. After that, the F code will be displayed. All F codes, except for F9, are
suppressed. F9 is the only error code that can be displayed for the consumer. A fault must exist continuously
for several minutes before an F code is stored (F2 and F8 are 1 minute or less).
On the JKS10, JKP30, JKP35, & JKP55, the F codes can be recalled by pressing the
Timer, Clock,
and
Min
Down
buttons simaltaneously. While F codes are displayed, pressing
Min Up
and
Hr Down
simaltaneously
will clear them.
On the JKP70, JKP75, PK916, PK956, ZEK938 & ZEK958, the F codes can be recalled by pressing the
Timer,
Clock,
and
9
buttons simaltaneously. While F codes are displayed, pressing
6
and
8
simaltaneously will clear
them.
ERROR
CODE
MEANING
CAUSE / CORRECTION
F0
Shorted OFF key
Determine if problem is with Key Panel or Control by disconnecting ribbon cable
and measuring
fl
at cable pins 3 to 4 on JKS10, JKP30, & JKP35; cable pins 7 to
12 on JKP55. Should be to probe side with conductor. Should be 125–175 ohms
while pressing OFF key.
For JKP70, JKP75, PK916, PK956, ZEK938, & ZEK958, perform glass touch board
key panel test, making sure to test EVERY pin combination for possible shorts. If
there are no shorts, the problem is probably with the Control.
F2
Oven temperature
inside oven cavity as
measured by sensor
over 650°F unlatched or
915°F latched.
Welded relay contacts on the relay board.
Cooling fan stalled or blocked.
Air
fl
ow to rear of unit.
High resistance in oven sensor leads and/or connectors (especially at sensor in
rear).
F3
Open oven sensor
(over 2900
Ω
)
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.
F4
Shorted oven sensor
(under 950
Ω
)
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.
F5
Sensor circuit
supervisor failure
Replace Control.
F7
Shorted matrix or START
key
For JKS10, JKP30, JKP35, & JKP55, determine if problem is with Key Panel or
Control by disconnecting
fl
at cable and measuring cable pins using pinout
chart. Allow up to 1000 ohms when pressing a key.
For JKP70, JKP75, PK916, PK956, ZEK938, & ZEK958, 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 or
other cause of open
thermal switches in
yellow or blue leads
Suspect stalled cooling fan or air
fl
ow to control area
Содержание JKS10
Страница 59: ...59 Continued Next Page Model JKP30 OVEN TEMP 1100 ROOM TEMP 2650 CLEAN TEMP...
Страница 60: ...60 Continued Next Page Model JKP35...
Страница 61: ...61 Continued Next Page Model JKP55...
Страница 62: ...62 Continued Next Page Models JKP70 PK916 ZEK938...
Страница 63: ...63 Continued Next Page Models JKP75 PK956 ZEK958...
Страница 64: ...64 Model JKP90 OVEN TEMP 1100 ROOM TEMP 2650 CLEAN TEMP ROOM TEMP ROOM TEMP RELAY COILS 650 24 VDC...
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