GE JS998 Series User Manual

– 62 –
Lower Convection Element Does Not Work
Enter the service mode and turn on the
lower convection element.
Is the lower convection element on?
No
Disconnect the lower convection
element. Is 240 VAC present
from the LORB relay K121 COM
to K20 NO contacts?
Yes
Is 240 VAC present from the
LORB relay K121 COM
contact to K20 COM?
No
Is -14.0 VDC present from
the MLB connectors J4,
pin 7 to J5, pin 2?
Yes
Is -14.0 VDC present from
the LORB connectors J9,
pin 7 to MLB J3, pin 2?
Repair the
faulty wiring
from the MLB
and LORB.
No
Yes
Replace
the LORB.
Is 4.2 VDC present from the LORB
connectors J9, pin 6 to MLB J3, pin 2?
Repair the faulty wiring
from the MLB to LORB.
Yes
Is 240 VAC
present at the
lower
convection
element
connectors?
Replace the lower convection element.
Repair the faulty wiring from the LORB
to the lower convection element.
Yes
No
Replace the
LORB.
Repair the faulty wiring
from the MLB to LORB.
Yes
No
Replace
the MLB.
No
No No
Is -14.0 VDC present
from the MLB connectors
J4, pin 5 to J5, pin 2?
No
Replace
the MLB.
Yes
Is -14.0 VDC present from
the LORB connectors J9,
pin 5 to MLB J5, pin 2?
No Yes
Repair the faulty
wiring from the
MLB to LORB.
Replace
the LORB.
Is 4.6 VDC present from the MLB
connectors J4, pin 6 to J5, pin 2?
Is 4.2 VDC present from the MLB
connectors J4, pin 2 to J5, pin 2?
Replace
the MLB.
No
Yes
Is 4.6 VDC present from the LORB
connectors J9, pin 6 to MLB J3, pin 2?
Yes
Yes
Is 240 VAC
present from the
LORB relay K121
COM contact to
K17 NC?
Repair the faulty
wiring from the LORB
relay K20 Com to K17
NC contacts.
Yes
No
Is 240 VAC present from
the LORB relay K121 COM
contact to K17 COM?
Yes
No
Is 240 VAC
present from the
LORB relay K121
COM contact to
K14 NC?
Repair the faulty
wiring from the LORB
relay K20 Com to K17
NC contacts.
Yes
Is 240 VAC present from
the LORB relay K121 COM
contact to K14 COM?
Yes
Is -14.0 VDC present
from the MLB connectors
J4, pin 4 to J5, pin 2?
No
Replace
the MLB.
Yes
Is -14.0 VDC present from
the LORB connectors J9,
pin 4 to MLB J5, pin 2?
No Yes
Repair the faulty
wiring from the
MLB to LORB.
Replace
the LORB.
No
Is 240 VAC present from
the LORB relay K121 COM
contact to K14 COM?
Replace R2 or
repair the faulty
wiring from the L1
or L2 input.
NoYes
No
No
Replace
the MLB.

GE JS998 Series Specifications

General

Brand	GE
Model	JS998 Series
Category	Oven
Language	English