Operating instructions
19
EXTERNAL SET POINT INPUT
Set Point changes when the knob is rotated
Check the dip switch (pg. 3).
Set Point always reads OFF
Check the wiring is appropriate for the application (see pg. 16). Then use an ampmeter to measure the 4-20mA input. If the input
is below 3.9mA or above 20.1mA, the Set Point will always be OFF.
INTERFACE INPUT
Display does not show INF
Check the dip switch (see pg. 3).
Stages do not sequence
Make sure that any stages which should be sequenced have their OFF/AUTO/ON switch in the AUTO position. Check the wiring
between the BCP-6/12 and the BCP-4 as shown on pg. 6. Check for continuity on each wire. Make sure the metal jumper is
between terminals 15 & 16 of the BCP-4. If the wiring is correct, check the manual for the BCP-4 for further troubleshooting
procedures.
LEAD STAGE
There is no green lead stage light on
Check the 120VAC power input to the BCP-6/12. Turn power to the panel off and back on. If one lead stage LED does not light,
then the unit may be damaged.
There are more than one green lead stage lights on
Check the 120VAC power input to the BCP-6/12. Turn power to the panel off and back on. If only one lead stage LED does not
light, then the unit may be damaged.
Lead Stage does not rotate when switch to INCREMENT
Only units which have (all stages of) their OFF/AUTO/ON switches in the AUTO position and which are designated as Unit or Lo
stages can be lead. If there is more than one stage which meets this criteria, the BCP-6/12 may be damaged.
Lead Stage does not rotate every 24 hours (First On/Last Off Rotation)
First check the dip switch is set up for First On/Last Off rotation (see pg. 3). Then check the lead stage can be rotated as de-
scribed above. Then check the INCREMENT/OFF/AUTO switch is in the AUTO position. In the AUTO position, the lead stage
should rotate among the possible lead stages every 12 hours after the unit is first powered up, and then every 24 hours after that.
If the panel loses power, the lead stage and the rotation timer will be reset.
Lead Stage does not rotate First On/First Off
First check the dip switch is set up for First On/First Off rotation (see pg. 3). Then check the lead stage can be rotated as de-
scribed above. Then check the INCREMENT/OFF/AUTO switch is in the AUTO position.
OUTPUT STAGES
When switched to ON, the stage does not come on
Remove any wires attached to the BCP-6/12 OUTPUT terminals. Check for continuity across the N.O. contacts. If there is
continuity, the BCP-6/12 is working correctly. Check the wiring and the stage being energized to determine why it is not operat-
ing.
Red stage light is lit, but the stage is not on
The BCP-6/12 is calling for this stage to be on. Follow the procedure above.
Red stage light is not lit, but the stage is on
The BCP-6/12 is not calling for this stage. Remove any wires attached to the BCP-6/12 output. Check for continuity across the
BCP-6/12 N.O. contacts. If there is no continuity, the BCP-6/12 output is working correctly. Check the unit for any other operat-
ing controls which may be causing it to energize.
Stages don’t sequence
Make sure that the red output lights on the BCP-6/12 correspond to the stages operation. If they don’t, follow the steps above.
Then check the dip switches (pg. 3) to be sure they are set correctly for your application. Check the Set Point or the Calculated
water temperature is what is expected. Check the OFF/AUTO/ON stage switches. Only units which have all stages switched to
AUTO will be part of the automatic sequencing.
SYSTEM OUTPUT
When switched to ON, the System Combustion Air Damper or Pump does not come on
Remove any wires attached to the BCP-6/12 SYSTEM terminals. Check for continuity across the N.O. contacts. Then check the
N.C. terminals are open. If both are true, the BCP-6/12 is working correctly. Check the wiring and the unit being energized to
determine why it is not operating.
Red stage light is lit, but the System Combustion Air Damper or Pump is not on
The BCP-6/12 is calling for the unit. Follow the procedure above.