Blodgett Combi BC14E, Service And Repair Manual

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BC14G
3---1
BC14G TROUBLESHOOTING GUIDE
In the following troubleshooting guide, the sche-
matic is broken down into areas. This allows the
oven to be checked in sections.
When troubleshooting, slide the control panel out
and use your volt meter. The main control circuit
voltage for all Synergy ovens is 230 volts. Once the
problem is determined, it is often easier to remove
the slide out from the oven completely to change
components. To remove the slide out, disconnect
the hot air thermostat probe, ground wire, and
large brown plug in connector.
NOTE: Always troubleshoot a Synergy oven in the
following sequence: COOL DOWN, HOT
AIR, STEAM, and then COMBI. Reference
the text that follows with the appropriate
troubleshooting schematic to help you
troubleshoot each mode.
NO OPERATION WITH THE MODE SWITCH IN
COOL DOWN
1. Verify the deliming switch is in the on position.
2. Verify power is being supplied at the outlet.
3.
115V only
--- Check fuses in the small pull-out
fuse holder under the power plug in the rear of
the oven. See FIGURE 1, location (A).
4.
115V only
--- Check the input and output of the
step-up transformer located in the rear of the
oven in the upper left hand corner. In order to ac-
cess the transformer you must remove the back
panel. A good place to check the output voltage,
before removing the back panel, is at the delim-
ing switch on the left hand side of the oven.
5. Check the mode switch. See FIGURE 1.
6. Check the fan speed switch. See FIGURE 1
location (G).
7. Check the solid state speed control if the motor
works in high speed and not low. See
FIGURE 1, location (I).
8. Check the motor. See FIGURE 1, location (J).
NO OPERATION WITH THE MODE SWITCH IN
HOT AIR
1. Check power at terminal 12 on mode switch,
See FIGURE 1, location H. If no power, contin-
ue. If power is 208V, proceed to STEP 8.
2. Check F3 oven high limit. See FIGURE 1, loca-
tion (B).
3. Check the mode switch. See FIGURE 1.
4. Check the S2 door switch. See FIGURE 1,
location (D).
5. Check relay R5. See FIGURE 1, location (E).
6. Check timer S5. Turn the timer to ten minutes
and continue. See FIGURE 1, location (E).
7. Check the mode switch. See FIGURE 1, loca-
tion (H).
8. Check thermostat P5. See FIGURE 2, location
(B).
9. Check that relay R205 contacts 9 and 1 are
closed. See FIGURE 2, location (A).
10. If the hot air light is not lit on P5 check P5 temp
controller for voltage. See FIGURE 2 location (B).
11. Check XFMR input and output voltage. See
FIGURE 2.
12. Check hot air IGN1 terminal THS2 for voltage.
See FIGURE 2 location (D).
13. Check hot air IGN2 terminal THS2 for voltage.
See FIGURE 2 location (E).
NO OPERATION WITH THE MODE SWITCH IN
STEAM
1. Check power at terminal 6 on the mode switch.
See FIGURE 1, location (H). If no power, return
to
NO OPERATION WITH THE MODE SWITCH IN
HOT AIR . Your problem is most likely a bad
mode switch position. If power is 208V, proceed.
NOTE: The hot air is cycled on in the steam
mode to boost temperature .
2. If the steam logo by the mode switch is illumi-
nated, jump to STEP 10.
3. If the low water light in the lower right hand cor-
ner of the control panel stays on, jump to NO
FILLING OF STEAM GENERATOR
.
4. If hot air light not lit on P5 check P5 temp con-
troller for voltage. See FIGURE 3, location (B).
5. Check thermostat P5. See FIGURE 3, location
(A).
6. Check that relay R205 contacts 9 to 5 are
closed. Check coil and contacts for proper op-
eration. See FIGURE 3, location (I).
7. Check F6 high limit. See FIGURE 3.