| Alarm Type | LCD Display | Likely Cause (per manual) | Action | | :--- | :--- | :--- | :--- | | | ALARM + High value | Real oil mist (piston blow-by, bearing hot spot) | Slow engine, investigate crankcase. | | Pre-Alarm | PRE-ALARM | Rising mist or sensor drift | Increase monitoring, check scavenge fires. | | Fault Alarm | FAULT + Code E-01 to E-12 | Electronic failure, no airflow, lens broken | Check blower motor, wiring, fuse F2. | | Low Flow | FLOW ERROR | Blocked sampling tube, blower impeller stuck | Blow out tube with compressed air (careful: 0.5 bar max). |
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| Issue | Possible Cause | Troubleshooting Steps | | :--- | :--- | :--- | | | Dirty measuring cell | 1. Perform a thorough cleaning of the glass measuring cell. 2. After cleaning, if still not zero, perform a zero adjustment procedure per the manual. | | Frequent false alarms | Solid particles interfering with reading or dirty cell | 1. Verify the sample water source quality. 2. Clean the measuring cell. 3. Check if the alarm settings are too sensitive. | | Consistently high or erratic readings | Dirty measuring cell, sample flow issues, or need for calibration | 1. Clean the measuring cell. 2. Check sample water flow and connections for blockages. 3. Perform a calibration check using the 100-FTU solution. | | Unit goes into alarm state frequently | Contamination, calibration drift, or system problem | 1. Flush the cell with clean water. 2. If problem persists, consult the full troubleshooting section of the manual. | | Alarm does not trigger at 15 ppm | Incorrect alarm setpoint, malfunctioning sensor, or calibration needed | 1. Verify and adjust the alarm setpoints. 2. Perform a calibration check with the 100-FTU solution. 3. Professional calibration might be required. | deckma omd11 manual
| Fault Indication | Likely Cause | Manual Page Reference (Typical Rev 5.0) | | :--- | :--- | :--- | | | LED driver board failure or degraded LED. | Section 9.2.4 – Test points for voltage (5.2V DC expected). | | "Flow Failure" | Blocked sintered filter on the crankcase fitting or damaged diaphragm pump. | Section 8.3.1 – Filter replacement interval (every 8000 hrs). | | "Zero Offset" | Contaminated reference cell due to oil carryover. | Section 10.1 – Procedure for chemical cleaning of the measuring chamber. | | "Heater Current Low" | Open circuit in the heating element (crankcase cold but not warming). | Section 12 – Wiring diagram for heater (pins 14 & 15 on terminal strip X3). | | Frequent False Alarms | Condensation (not mist) – unit too cold. Manual specifies ambient range -25°C to +55°C. | Section 2.4 – Ensure a heated enclosure is used for cold climates. |
Operating the OMD-11 involves routine system checks, zero-point calibrations, and monitoring indicator lights. Front Panel Components | Alarm Type | LCD Display | Likely
It must be placed as close as possible to the oily water separator. The distance must never exceed 8 meters to ensure a response time under 20 seconds, as required by IMO regulations.
DeckMa OMD11 is a compact digital multimeter designed for hobbyists and light professional use — measuring voltage, current, resistance, continuity, diode check, and basic capacitance/frequency depending on model variant. | | Low Flow | FLOW ERROR |
• Air bubbles trapped in the sample stream.• Severe electrical noise from nearby machinery.
Deckma OMD-11 Bilge Alarm Monitor Go to product viewer dialog for this item. : A Comprehensive Manual & Guide The Deckma OMD-11
A straight beam of infrared light is passed through the flowing water sample.
