Fireye InSight II Marine Flame Scanner

8.2 Common faults and troubleshooting

Possible causes and solutions for the fault phenomenon

The display screen does not light up. The 24V power supply is missing or the polarity is reversed. Check the power supply, fuse, and wiring terminals

Fault relay action internal self-test failure (sensor, memory, etc.) Record fault code, refer to manual; Try restarting or replacing the scanner

Low flame signal intensity, dirty observation window; Insufficient cooling air causes condensation on the lens; The gain setting is too low; Frequency mismatch cleaning observation window; Increase the cooling air flow rate; Increase gain; Reconfigure frequency automatically

When there is no fire, there is still flame signal (false alarm) and furnace wall radiation interference; Interference between adjacent burners; Improper frequency selection to switch to UV+IR logic and mode; Change the modulation frequency; Check if the observation tube is aligned with the furnace wall

When there is a fire, the relay does not engage and the threshold for engagement is set too high; Low gain reduces the suction threshold; Increase gain

The 4-20mA output remains unchanged or experiences abnormal circuit disconnection; PLC input module overload; Scan the analog output for damage and check the wiring; Measure circuit current; Attempt to restore factory settings

Communication failure (Explorer software) Communication cable error; Confirm the use of the correct adapter for baud rate mismatch; Check the COM port settings in the software

8.3 Maintenance and Calibration Cycle

Daily: Check the cooling air pressure/flow rate and observe the display screen for any fault codes.

Every 3 months: Remove the scanner and clean the observation window (using lens paper and specialized cleaning agent). Check if the sealing gasket is aging.

Every 6 months: Use a flame simulator or a known flame source to verify the pull in/release threshold of the flame relay. Calibrate 4-20mA output.

Every 12 months: Conduct comprehensive functional testing, including flame failure response time and fault relay action.

Long term shutdown: If the boiler is shut down for more than a month, the scanner should be removed, stored in its original packaging in a dry environment, and the opening of the observation tube should be blocked to prevent moisture from entering.

Alternative selection and compatibility recommendations

The InSight II Marine Scanner is an ideal upgrade and replacement solution for the Fireye 95UV, 95IR, or early InSight models still in use on older ships. Attention should be paid when replacing:

Mechanical adaptation: Old models may use different installation flanges. InSight II requires the use of a 60-2693-x flange, which may require on-site modification of the observation pipe threads.

Electrical interface: Old systems may use independent amplifiers (such as Fireye E110, E220, etc.). After replacing with InSight II, the amplifier and flame switch module can be removed, and the relay output of the scanner can be directly connected to the BMS. This greatly simplifies the wiring.

Cable: Old cables may have insufficient cores. Suggest replacing with a new Fireye 59-546 or 59-547 cable to ensure shielding and signal integrity.

Configuration migration: Record the flame frequency and gain settings of the old system, manually input them in the new scanner or use the automatic configuration function to re optimize.