Blodgett BCX14E Troubleshooting Manual page 23

BCX14E
BCX14E TROUBLESHOOTING GUIDE
4. Checking for logic board input/output LED
indicators, in the hot air mode the amber input
LED's #6 and #9 need to be on along with the
green output LED #13. Verify LED'S with the
logic board LED designation flow chart
(FIGURE 11).
5. Also look for LED indicator inputs at the (IFB)
relay board, the CR3 relay LED (D31), CR2
relay LED (D21) and the CR1 relay LED (D11)
will all need to be on.
connectors and the 24Dcv inputs at the J7
connector per the wire schematic.
LED'S with the IFB LED indicator designation
flow chart (FIGURE 12).
6. If all of the above are good continue testing
checking at the lower of the two Dcv 24V
power supplies for a lighted small green light
along with checking for 24Dcv output.
7. 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.
8. 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 OPERATION WITH THE MODE SWITCH
IN STEAM
1. Verify that the convection motor is running
with the door closed. If not see door switch
troubleshooting flow chart (FIGURE 7).
2. Verify that the thermostat has powered up,
counted down and displaying a set temperature
along with the heat indicator light activated.
3. Remove the LH body side panel and tilt the
control panel down for troubleshooting access.
4. Check for logic board input/output LED
indicators, in the steam mode the amber input
LED's # 3 and # 6 need to be on along with the
green output LED # 10. Verify LED'S with the
LED designation flow chart (FIGURE 11).
5. Look for LED indicator inputs present at the
IFB relay board, looking for the CR3 relay
LED (D31), CR2 relay LED (D21) and the
If not check all
Verify
6. CR7 relay LED (D71) should be on. If not
check IFB connector J7 between (J7-1) to (J7-
2) for 24Dcv input see wire schematic. Verify
LED'S with the IFB LED indicator flow chart
(FIGURE 12).
7. 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 (K2) steam 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. In either case no voltage go the IFB relay board
and check for 24dcv at J6 connector between
J6-1 and J6-2 for 24dcv from the power supply,
good check from J6-5 to logic board J1-1 for
24dcv output to the contactor coil.
NO OPERATION
SWITCH IN COMBI
1. Verify that the convection motor is running with
the door fully closed. If not see door switch
troubleshooting flow chart (FIGURE 7).
2. Verify that the thermostat has powered up,
counted down and displaying a set temperature
along with the heat indicator light is activated.
3. Remove the LH body side panel and tilt the
control panel down for troubleshooting access.
4. Checking for logic board input/output LED
indicators, in the Combi mode the amber input
LED's #2 and #6 need to be on along with the
green output LED #13 and then #10 for 45
seconds intervals of steam while in Combi.
Verify LED'S with the LED designation flow
chart (FIGURE 11).
5. Look for LED indicator inputs at the (IFB) relay
board, looking for the CR3 relay LED (D31),
CR2 relay LED (D21), CR1 relay LED (D11)
will all need to be on and CR7 relay LED (D71)
will be on during a 45 second steam on time. If
not check all connectors and the 24Dcv input at
the J7 connector per the wire schematic #50277
between (J7-1) to (J7-2). Verify the LED inputs
with the IFB LED indicator designation flow
chart (FIGURE 12).
B l o d g e t t O v e n
WITH THE MODE
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