Blodgett BCX14E Troubleshooting Manual page 24

BCX14E
BCX14E TROUBLESHOOTING GUIDE
8. If all of the above is good continue testing
checking at the lower of the two power supplies
for a lighted small green light along with
checking for 24dcv output.
9. Next go directly the (K1) hot air contactor and
measure the coil voltage between A1 & A2 for
24dcv volts, if not check A1 at the coil to the J1
connector at the logic board J1-1 for 24dcv and
if okay check A2 coil to logic board J1-4 for
24dcv.
10. Hot air contactor will mostly control the Combi
mode along with the logic board switching
from hot air contactor to steam contactor for on
and off for about 45 seconds as long as the
boiler has come above the preheat temp of 180°
already.
11. In either case no voltage go the IFB relay board
and check for 24dcv at J4 connector between
J4-1 and J4-2 for 24dcv from the power supply,
good check from J4-6 to logic board J1-1 for
24dcv output to the contactor coil.
NO FILLING OF THE STEAM BOILER
1. Verify the water pressure and flow of the water
pressure through the pressure regulator.
2. Verify that the control panel circuit breaker is in
the on position.
3. Check for 24Dcv at the power supply with the
mode switch in the off position, green light ON.
4. Shut the water supply off, then at the IFB board
locate the flush switch in the center RH of the
relay board and press and hold it for 45 seconds
while checking for water flow out the drain.
5. After doing so disconnect the float wires (mark
as needed) check for continuity, both floats are
normally closed and open when are floats full.
6. If floats are closed re-connect the float wires
and turn the water supply back on. At this point
with the mode switch still in the off position the
logic board LED indicators amber input # 8 and
green output # 15 should be on activating the
fill solenoids.
7. No water filling yet check the IFB fill enable
CR8 relay LED (D81), if not on check the relay
board J8 connector at (J8-1) to (J8-2) for 24dcv.
8. See the float switch troubleshooting flow chart
(FIGURE 8).
OVER FILLING OF THE STEAM BOILER
1. Turn off the control panel circuit breaker to see
if the water over filling continues in the oven.
2. If water stopped when power was off, turn the
circuit breaker back on and check for the fill
light on the control panel and look at the logic
board for LED indicators.
input # 8 and green out put # 15 are on this
would indicate the (LLC) low level cut float is
in the closed position and will not open. Repair
or replace floats switch as needed.
3. Check both float switches for normally closed
when empty and open when steam generator is
full. (If they do not open repair or replace floats
as needed.
4. See the float switch troubleshooting flow chart
(FIGURE 8).
CONVECTION MOTOR
REVERSE DIRECTIONS.
1. This oven comes equipped with the feature of
the convection motor reversal after every six
minutes of motor run time in all modes except
for the cool down mode.
2. When any mode but cool down is activated the
motor should start up counter clockwise.
3. Check for 24dcv at the TMR1 timer between
A1 to A2. When verified test between A1 to #
16 for 24dcv after six minutes 24dcv will
switch from terminal #16 to # 18. (If voltage
does not switch remove the wire from #18 and
retest the timer for switching.
4. What ever the out come the motor speed
inverter is looking for a 24Dcv_Rtn_L input
from the timer to either terminal #5 or #6 at the
motor speed inverter to reverse directions.
5. See the motor reverse troubleshooting flow
chart (FIGURE 9).
DOOR SWITCH TROUBLESHOOTING
1. The door switch is a proximity switch that is
activated by the metal of door when it is closed
therefor-proper adjustment is needed.
2. The door switch is located at the lower left
corner with the door open the switch will be
B l o d g e t t O v e n
If LED's amber
WILL NOT
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