T r o u b l e s h o o T i n g T r e e s
T
r o u b l e s h o o T i n g
T
r e e s
• E
l E c t r i c
c
o m b i t h E r m
c
o m b i
t
o u c h
t
E c h n i c a l
S
E r v i c E
m
a n u a l
• D 11
E S I — N o C o n v e c t i o n H e a t P r o d u c t i o n
Is the door switch in the
closed position?
Close door/investigate
issue with S-7 door
switch.
No
Yes
Is the convection fan motor
running?
See "Convection Fan Motor
Not Operating".
Is the B-5 Steam Bypass
probe below set point
(200°F/°C)?
Steam contactor will
not be energized until
B-5 is below set point.
Determine which side of the coil
voltage is missing and correct.
• A-1 is L-1 switched from the
HRB (High Voltage Relay Board)
• A-2 is L-2 supplied from the
N-7 high limit.
Are the convection element
contactors K-41/42 being
energized?
Replace faulty
contactors.
Are the K-41/42 contactors
pulling in?
Investigate wiring issue
between main power
terminal block and
K-41/K-42.
Is there line voltage across
T1-T2 (K-41) and T-3
(K-42)?
Replace faulty contactor(s).
Is there line voltage across
L-1-L-2 (K-41) and L-3
(K-42)?
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
No
Investigate wiring issue
between K-41/42 and
convection element terminals.
Is there voltage across all
convection element loops?
Yes
No
Replace faulty
convection element.
Are the convection elements
drawing current?
Yes
No
Determine which side of the solenoid
coil voltage is missing and correct.
• A-1 is L-1 switched in from the HRB
(High Voltage Relay Board).
• A-2 is L-2 constantly supplied from
the X-11-130 (Blue) terminal block.
Is the Y-1 solenoid being
energized?
Yes
No
Ensure connected water
pressure does not exceed 90 psi
and/or replace faulty solenoid.
Is the Y-1 solenoid opening?
Yes
No
Check for obstruction in the
hose or flow control valve.
Correct and retest.
Is water flowing into and
through the flow control
valve?
Yes
No
Check for obstruction between flow control
valve and injection tube. Correct and retest.
Is water flowing into the
disintegration box in the center
of the fan wheel?
Yes
No
Steam production is in process and steam production in the
oven cavity should be visible.
Yes
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