Fault
Symptom, alarm or fault code, and the impact on vessel or machinery operation.
PANAMA · VESSEL TROUBLESHOOTING · ELECTRICAL & AUTOMATION
Rapid Marine Electrical & Automation Troubleshooting in Panama
Vessel arriving in Panama with a PLC, HMI, alarm, drive, generator-control, switchboard or machinery-control fault? Send the fault, equipment details and vessel schedule so TESS can review the problem and prepare the technical attendance before boarding.
Panama Canal · Balboa · Colón / Cristóbal · Alongside or anchorage subject to location, access and confirmed scope
Before the Vessel Arrives, Send What You Have
Better information before boarding means better use of the vessel’s limited time. Start with three things.
What TESS Does Onboard →As-found → Isolate → Correct → Test → Document
Equipment
Maker, model and relevant PLC / HMI / VFD. Nameplate photos, alarm screenshots and drawings help.
Vessel window
Current or planned location, ETA, ETD and the time available for onboard attendance.
Send what you have. Missing information should not delay the first technical review.
What Fault Are You Seeing?
Start with the symptom. The diagnostic scope follows the installed equipment and its interfaces.
PLC / Controller Fault
- What you see
- CPU STOP, PLC not responding, failed module, missing I/O, communication lost, or machinery stopped after a controller replacement with no program.
- What we assess
- Control power, CPU state, I/O, field signals, module condition, network and project / backup availability. For example, installed Siemens SIMATIC S7 or Schneider Modicon equipment.
Access and restoration depend on installed hardware, software access, project backups and authorization. Locked projects, unavailable source code and safety logic require a separately agreed route.
PLC / HMI Specialist Support →
Send this fault: PLC / Controller Fault →HMI / Display Fault
- What you see
- Black or frozen screen, touch failure, no PLC communication, obsolete panel or a replacement HMI that will not connect.
- What we assess
- Power, display hardware, PLC connection, communication drivers, compatibility and availability of the editable project.
Project extraction or restoration is assessed for the installed panel and available software; it is not always possible.
PLC / HMI Specialist Support →
Send this fault: HMI / Display Fault →Alarm / Sensor / Monitoring Fault
- What you see
- An alarm keeps returning, readings disagree with actual condition, or a sensor / remote I/O channel disappears.
- What we assess
- Physical condition → sensor → wiring → signal → remote I/O → controller → network → display / alarm logic. Relevant signals include 4–20 mA, 0–10 V, digital and RTD; temperature, pressure and level.
Installed Böning monitoring, alarm, display or navigation-light interfaces can be assessed subject to system access and confirmed scope.
Alarm, indication or sensor fault already localized? See Alarm & Monitoring Systems. →
Send this fault: Alarm / Sensor / Monitoring Fault →VFD / Motor Control Fault
- What you see
- VFD trip, motor will not start or stops after command, starter / contactor fault, overload, soft starter issue or communication fault.
- What we assess
- Supply → protection → drive / starter → motor → command → interlock → mechanical load. Review fault history and installed drive data before proposing a change.
Support for installed ABB, Siemens, Schneider, Danfoss, Vacon or Yaskawa drives depends on the model, software, documentation and access.
Drive & Motor Specialist Support →
Send this fault: VFD / Motor Control Fault →Switchboard / Control Power Fault
- What you see
- Breaker will not operate, intermittent control power, relay / contactor fault, lost 24 VDC or a UPS / charger alarm.
- What we assess
- Breaker-control circuits, relay logic, DC supply, UPS, charger and control transformer; earth / insulation investigation where safely scoped.
Voltage, system, safe isolation procedures, access and qualified resources determine scope. Energized work and unrestricted high-voltage intervention are not standard attendance.
Switchboard & Power Distribution Specialist Support →
Send this fault: Switchboard / Control Power Fault →Generator / PMS / Synchronization Fault
- What you see
- No auto-start, breaker will not close, failed synchronization, unstable load sharing, dropped load, missing PMS command or blackout-recovery fault.
- What we assess
- AVR and governor interfaces, breaker, synchronizer, PMS / PLC, sensing, feedback and permissives against the installed control sequence.
Electrical and control troubleshooting; mechanical work requires a separately accepted scope.
Send this fault: Generator / PMS / Synchronization Fault →Machinery Automation Fault
- What you see
- Winch, windlass, crane, pump, compressor or HPU unavailable; HVAC / refrigeration, sewage, RO, ballast / bilge, gangway, ramp or door controls not responding.
- What we assess
- Electrical + automation + hydraulic / mechanical interface. Check commands, permissives, interlocks, feedback and actual machinery response together.
A machinery stoppage is not automatically a PLC fault. The diagnostic finding determines which discipline is needed.
Machinery sequence, interlock or local-control fault? Explore Machinery Control & Automation. →
Send this fault: Machinery Automation Fault →Communication / Network Fault
- What you see
- Device unavailable, remote I/O offline, PLC–HMI communication lost, intermittent node or network fault after replacement.
- What we assess
- Power, physical connection, termination, device status, addressing, topology, configuration and controller state. Modbus RTU / TCP, PROFIBUS, PROFINET, CAN / CANopen, Ethernet and RS232/485 where installed and supported.
Network changes require an agreed scope, system information and authorization; no arbitrary changes to the vessel’s OT network.
PLC / HMI Specialist Support →
Send this fault: Communication / Network Fault →Use the Panama Call as a Troubleshooting Window
Preparation before boarding makes short attendance valuable. A 4–6 hour, 8–12 hour, overnight or one-day call can provide a diagnostic window; completing the repair within that window depends on findings, access, software and parts.
Before arrival
Review the fault, equipment and ETA / ETD. Collect drawings, photos, backups and an OEM contact; confirm the engineer, tools and boarding plan.
During attendance
Record the as-found condition, isolate the fault, correct where practical and authorized, and perform agreed functional tests.
Before departure / after attendance
Record the result, any remaining limitation and the next technical action, including parts, OEM input or a further attendance.
Attendance depends on vessel location, agent and boarding arrangements, confirmed timing, engineer availability, equipment / tools, launch access, safety and actual system condition. Alongside and anchorage access must be confirmed. Work during active Panama Canal transit requires separate confirmation.
What TESS Does Onboard
A disciplined attendance produces evidence, an agreed intervention and a clear result.
- 01
As-found
Record condition, alarms, system state and relevant settings before unnecessary changes.
- 02
Isolate
Trace the source: power, wiring, sensor, controller, actuator, communication, configuration or mechanical / hydraulic interface.
- 03
Correct
Where practical and authorized: repair wiring, replace approved parts, restore connections, permitted parameters or approved backups, and correct interfaces.
- 04
Test
Perform the agreed functional test of the equipment or system with the vessel team.
- 05
Document
Record the result, cause where established, work completed, limitations and recommendation.
OEM Specialist Abroad? TESS Can Provide the Engineer Onboard in Panama
Combine the OEM’s remote system knowledge with an engineer at the vessel and the crew’s operating knowledge. Agree access, responsibilities and the test plan before intervention.
- Remote OEM specialist
- TESS engineer onboard
- Vessel system + crew
- Identify equipment and verify model / serial
- Connect an approved diagnostic interface and collect logs
- Take readings, inspect wiring and confirm signals
- Replace OEM-approved parts where agreed
- Support remote commissioning and agreed functional tests
This is a coordinated onboard support model. Manufacturer authorization, software access and remote support must be confirmed for the specific equipment and scope.
A Successful Attendance Can Have Three Outcomes
Each is a valid technical result. The scope and vessel window determine what can be completed.
Repaired
The fault is corrected and the agreed functionality is verified. The completed work and test result are recorded.
Diagnosed
The cause is established or sufficiently narrowed. Final restoration may require a spare, software, OEM support, an unavailable module or more vessel time.
Engineering next step
The condition is stabilized where possible or technically understood. Lifecycle assessment, replacement, migration, retrofit or modernization becomes the justified next scope.
When a Fault Becomes a Larger Engineering Scope
A diagnostic finding can reveal that another local repair will not address the underlying limitation. Any larger scope is proposed from the evidence and agreed separately.
- PLC fault → obsolete controller → lifecycle assessment / migration
- HMI fault → unavailable panel or editable project → migration
- Alarm fault → aging monitoring architecture → system review / retrofit
- VFD fault → obsolete drive family → replacement / modernization
- Switchboard fault → aging control / protection → upgrade
- Recurring machinery-control fault → control-panel modernization
Marine Automation Experience Behind the Attendance
The published marine automation case documents work led by TESS’s lead engineer in Europe outside TESS: bridge-console fabrication, control-cabinet assembly and wiring, and integration of propulsion, power, monitoring and alarm systems. It shows relevant integration experience; the scope of your attendance is assessed separately.
View Marine Automation Experience →What You Receive After Attendance
A service record proportionate to the agreed job, with the evidence needed to understand the result and decide what comes next.
- Vessel / equipment and attendance time
- Reported fault and as-found condition
- Checks and work performed
- Parts / components used, where relevant
- Functional result and remaining issue
- Recommendation and approved photos where useful
Send the Fault, Equipment Details & Vessel ETA
Request a technical review to prepare the scope of paid onboard attendance. Send what you have. Missing information should not delay the first technical review.
Call / WhatsApp Technical Service
Before You Request Attendance
What information should we send before the vessel arrives?
Start with a contact, vessel name, current or planned Panama location, ETA / attendance date and fault description. Add the maker, model, alarm code, photos, drawings, backups and ETD when available. Perfect documentation is not required for the first review.
Can TESS attend during a short Panama call?
A short call can be a useful diagnostic window when prepared in advance. Timing depends on location, agent / boarding arrangements, engineer availability, access, safety and confirmed scope. A short attendance does not guarantee completed repair.
Can you recover a PLC program?
Recovery must be assessed against the installed controller, software access, protection, project files, backups and authorization. Some controllers do not retain editable source projects. Universal recovery, access to locked projects and source-code reconstruction cannot be assumed.
What if the PLC has been replaced but no program is available?
Send the original and replacement model details, symptoms and any available backups. TESS can assess compatibility and the available restoration route with the owner and OEM. The replacement controller may require the correct application project; diagnosis cannot substitute for missing authorized software.
Can you troubleshoot a generator synchronization problem?
The agreed electrical / control scope can include sensing, permissives, breaker control, synchronizer, PMS, PLC and AVR / governor interfaces. Mechanical work is separately scoped. Testing depends on safe vessel operating conditions and authorization.
Can you work with the OEM remotely?
TESS can provide the onboard engineer for agreed equipment identification, readings, wiring checks, logs, approved interfaces, component replacement and functional tests. OEM availability, software access and authorization must be confirmed beforehand.
Do you troubleshoot VFDs?
Yes, subject to the installed drive model and available access / documentation. Diagnosis considers the supply, protection, drive or starter, motor, command, interlocks and mechanical load. Parts and software requirements are reviewed before restoration is proposed.
Can you diagnose false alarms and sensor faults?
The displayed alarm is checked against actual physical condition, then the sensor, wiring, signal, remote I/O, controller, network and display / alarm logic. An alarm should not be dismissed or bypassed without establishing what it represents.
Can you attend winch, crane or pump automation faults?
TESS can assess electrical and control symptoms within the confirmed machinery scope. Commands, permissives, interlocks, feedback and hydraulic / mechanical response may all be involved. A stopped machine is not necessarily a failed PLC.
What if the fault cannot be repaired during the first attendance?
The record explains the findings, work completed, functional result, remaining limitation and recommended action. A diagnosed fault requiring parts, OEM support or more time is a valid outcome. Obsolete or repeatedly failing systems may require a separately agreed engineering scope.
Prepare the Attendance Before the Vessel Arrives
Send the fault, installed equipment and Panama vessel window. TESS can then review the appropriate engineer, tools, access and technical next step.