Original Manual Control Logic Boar - Blodgett BCX14G Troubleshooting Manual

Amber LEDs glow to show Inputs
LED 1 = Flush Disable (&Combi Preheat)
J1.2 -24VDC Input from Flush Disable T-stat that
opens at 158 F. LED Off = Flush Disabled
LED 2 = Combi Mode
J3.1 -24VDC Input from the Mode Switch, SW1
that indicates the selection of Combi Mode
LED 3 = Steam Mode
J3.2 -24VDC Input from the Mode Switch, SW1
that indicates the selection of Steam Mode
LED 4 = Steam On Demand Call
J3.7 -24VDC Input from the Steam on Demand
Button, SW10 that indicates the selection of
Steam On Demand
LED 5 = Spare Input
J3.8 not used
LED 6 = Heat Demand
J4.1 -24VDC Input from the Temperature
Controller, TC1 that indicates a call for heat
LED 7 = Boiler High Limit
J4.5 +24VDC Input from the Relay Board triggered
by the boiler high limit signal to the Relay Board at
J6.6
LED 8 = Low Water
J4.8 +24VDC Input from the Relay Board triggered
by the Low Float Signal to J8.4 (Input Triggers the
Panel's Fill Light Also)
LED 9 = Hot Air Mode
J3.6 -24VDC Input from the Mode Switch, SW1
that indicates the selection of Hot Air Mode
LED 14 = Boiler Drain Open
J3.10 -24VDC Output to the Relay Board to enable
the J8.9 Output to Open the Drain Valve
LED 17 = Spare Output
J3.5 not used
LED 10 = Boiler Heat On
J4.6 -24VDC Output to the Relay Board to enable
the J6.5 Output, Boiler Main On +24VAC signal
LED 11 = Call for Delime
J4.4 -24VDC (Flashing) Output to the Delime Lamp
signals the Delime Timer has expired. The Timer is
set at the R1 potentiometer, for 30, 60 or 90 hours
between Delime calls. 30 is fully counterclockwise
and 90 is fully clockwise
LED 12 = Steam On Demand On
J4.3 -24VDC Output to the Steam On Demand
"Active" Light, indicating the Steam on Demand
cycle is active
LED 13 = Convection Heat On
J4.2 -24VDC Output to the Relay Board to enable
the J4.6 Main Burner On +24VAC signal
LED 16 = Delime Pump
J1.5 -24VDC Output to the Relay Board to enable
the J8.11 Delime Chemical Pump -24VDC signal
LED 15 = Boiler Fill Enable
J1.3 -24VDC Output to the Relay Board when the
Low Water Signal is present (LED 8) or the Heat,
Steam or Hot Air is Selected
104
Green LEDs glow to show Outputs