What to do if Kromschroder BCU 465 display flashes and indicates 51?
If the Kromschroder Control Unit display flashes 51, it indicates safety interlocks have discontinuity or there is no voltage at terminal #5. Check the safety interlocks. It can also mean there is a short-circuit at ignition or valve output, so check the wiring and fine-wire fuse F1 (3.15 A, slow-blow, H, to IEC 127-2/5).
What does it mean when Kromschroder BCU 465 Control Unit display flashes and indicates 02 or 03 at start-up?
If the Kromschroder Control Unit display flashes and shows 02 or 03 at start-up, even when the flame is verified visually, it could be due to several reasons: * The set value for the switch-off sensitivity is too high. * A short-circuit on the ionization electrode due to soot, dirt, or moisture on the insulator. * The ionization electrode is not correctly positioned at the flame edge. * The gas/air ratio is incorrect. * The flame is not contacting the burner ground because of excessively high gas or air pressure. * The burner or BCU is not adequately grounded. * There is a short-circuit or discontinuity on the flame signal cable. * The UV sensor is soiled. Correct the fault.
What to do if Kromschroder BCU 465 display flashes and indicates 32?
If the Kromschroder Control Unit display flashes and indicates 32, it means the supply voltage of the unit is below the rated voltage. Ensure the correct voltage supply is used; check the technical data for maximum ratings.
What does it mean when Kromschroder BCU 465 display flashes and indicates 0?
If the Kromschroder Control Unit display flashes and displays 0, it means the BCU has detected that the Proof of Closure Switch (OCS) input has no proof of closure signal in the standby position. Make sure that the wiring is correct: the BCU needs line voltage when the valve is closed and no voltage signal when the valve is opened. If the wiring is correct, check the switch and the valve for proper operation. If there is any doubt, remove the valve immediately.
What does it mean when Kromschroder BCU 465 display flashes and displays X?
If the Kromschroder Control Unit display flashes and displays X, it indicates that the BCU has no information that the OCS contact is still open. Ensure the wiring is correct: the BCU needs line voltage when the valve is closed and no voltage signal when the valve is opened during start-up. If the wiring is correct, check the switch and the valve for proper operation. If there is any doubt of correct operation, remove the valve immediately.
What does it mean when Kromschroder BCU 465 display flashes and indicates 2 at start-up?
If the Kromschroder Control Unit display flashes and indicates 2 at start-up, it means the BCU has no information that the OCS contact has opened. Ensure the wiring is correct: the BCU needs line voltage when the valve is closed and no voltage signal when the valve is opened during start-up. If the wiring is correct, check the switch and the valve for proper operation. If you have any doubt of correct operation, remove the valve immediately.
What to do if Kromschroder Control Unit display flashes and indicates 52?
If the Kromschroder Control Unit display flashes and indicates 52, it means the BCU is being permanently reset. Apply voltage to terminal 3 only for reset, approximately for 1 second.
What to do if Kromschroder Control Unit display flashes and indicates 10?
If the Kromschroder Control Unit display flashes and indicates 10, it means the BCU is repeatedly reset (more than 5 times in 15 minutes). Avoid automatic reset by PLC or without monitoring the burner. Reset the BCU manually.
What to do if Kromschroder BCU 465 display flashes and indicates 30?
If the Kromschroder Control Unit display flashes and indicates 30, it indicates an abnormal data change in the parameters set for the BCU. Reset the adjustable parameters to their original values using BC-Soft or remove the unit and return it to the manufacturer for inspection.
What does it mean when Kromschroder Control Unit display flashes and indicates 01?
If the Kromschroder Control Unit display flashes and displays 01, it could be due to: * The BCU has detected a flame signal simulation without the burner having been ignited (extraneous signal). * The UV tube in the UV sensor UVS is defective and permanently indicates an extraneous signal. Exchange the UV tube, order part # 04065304 – note the operating instructions for the UV sensor. * Flame signal through ceramic insulation.
Illustrates the BCU 465 in typical modulating and frequency firing control systems.
Details the BCU 465's application in modulating control systems.
Explains the BCU 465's application in frequency firing control systems.
Provides data on ignition transformer specifications and cycle times.
Guidelines for selecting and wiring cables for the BCU.
Discusses safety periods, interlocks, and low fire delay time.
Explains high-temperature operation and flame management bypass.
Details physical size and mass of the BCU unit.
Covers mounting methods, enclosure positioning, and fastening.
Describes external fastening options for installation.
Explains electrical connections via screw terminals.
Describes the optical interface, labeling, display, and buttons.
Lists display codes for program status and fault conditions.
Details the step-by-step startup process for the BCU 465.
Explains the ignition trial and safety period during startup.
Describes burner operation and how to view flame signal.
Covers purging, air valve operation, pre-purge, and post-purge.
Explains how to externally activate the air valve.
Details manual mode for adjustments and troubleshooting.
Describes the bypass input for high-temperature operation.
Lists configurable factory options like POC and flame failure response time.
Covers safety period settings and digital input for flame management bypass.
Details options configurable via PC software like switch-off threshold.
Guides on how to read and navigate parameters using the BCU.
Provides a detailed table of parameter settings and their ranges.
Continues the detailed table of parameter settings and their values.
Explains fault lockout behavior and how to reset the BCU.
Offers guidance for malfunctions and critical safety warnings.
Addresses common fault codes like 01, c0, cx, c2, and 02.
Covers fault codes 30, 31, 32, 51, and safety function checks.
Addresses fault codes 52, 53, 10, and startup issues.
General| Manufacturer | Kromschroder |
|---|---|
| Type | BCU 465 |
| Category | Control Unit |
| Frequency | 50/60 Hz |
| Operating Temperature | -20°C to +60°C |
| Gas Types | Natural gas, LPG |
| Approvals | EN 298 |
| Input Voltage | 24 V DC |
| Storage Temperature | -40°C to +70°C |
| Relative Humidity | Max. 95% non-condensing |
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