Complex & intermittent faults
Repeatable, evidence-led investigation where faults are unclear or not continuously present.
Fault Finding & Diagnostics
Fault Finding & System Diagnostics
Methodical root-cause investigation for complex electrical, controls and connected building-system faults.
ElectroLogic traces the relevant electrical path, control sequence and hardwired interfaces to establish evidence before component replacement is proposed. Software programming and work outside the agreed electrical scope remain with the appropriate specialist.
Evidence-led diagnosis
Find the cause, not just the failed symptom.
Intermittent and multi-system faults often sit between disciplines: a supply issue may appear as a controls fault, or a missing feedback signal may be mistaken for mechanical failure. Investigation is structured around the expected operation, the evidence available and the point at which that operation stops.
ElectroLogic supports difficult fault investigation across electrical distribution, control panels, field devices and connected building systems. Work is focused on the agreed electrical and hardwired control scope.
“Replace a component when the evidence supports it—not because it is nearest to the symptom.”
Technical capabilities
Practical investigation across the electrical control path.
Electrical supplies & protection
Incoming supplies, protective devices, isolation, circuit condition and voltage checks.
Control circuits
Commands, enables, permissives, status signals and hardwired operating logic.
Relays & contactors
Relay logic, contactors, overloads, timers, auxiliary contacts and control hardware.
Sensors & actuators
Electrical checks of sensors, switches, actuators and connected field wiring.
Motors & drives
Motor circuits, starters, VSDs, enable, run and fault signals, and connected interfaces.
System interfaces
Agreed electrical investigation of BMS, PLC, fire-alarm and access-control connections.
Circuit testing
Continuity and insulation-resistance testing where appropriate to the circuit and work scope.
Unidentified wiring
Tracing, identification, terminal checks and practical labelling support.
Temporary make-safe measures
Agreed isolation or stabilisation of affected equipment pending permanent remedial work. Safety circuits and protective functions are not bypassed.
Permanent repair or escalation
Electrical repair where confirmed, or clear findings for the responsible specialist.
Functional verification & reporting
Controlled proof of completed work, evidence, findings and practical recommendations.
Diagnostic method
Trace the expected operation to the point it stops.
A fault is examined as a path: available power, protection, command, control response, field device or equipment response, and returned status. The method makes it possible to separate electrical defects from mechanical conditions and specialist software issues.
Find the evidence before deciding the repair.
Lost supply or operated protection
Damaged or unidentified wiring
Failed relay, contactor, overload or timer
Missing command, enable or status signal
Sensor, actuator or field-device fault
Motor, starter or drive condition
BMS, PLC, fire-alarm or access-control interface issue
Mechanical plant condition
Software or parameter condition requiring specialist access
More than one interacting condition
- 1
Establish the symptom
Confirm the reported failure, operational impact and expected outcome.
- 2
Prove supply & protection
Verify the available electrical source, isolation and relevant protective condition.
- 3
Trace command & control circuit
Check enables, interlocks, control hardware and the expected signal path.
- 4
Test field response & feedback
Check connected devices, equipment response and returned status.
- 5
Confirm boundary & next action
Separate the proven electrical issue from mechanical or specialist software work.
Systems & evidence
The electrical path often crosses more than one system.
Support can cover the physical electrical and hardwired interface layer across distribution, control panels, motors and drives, field devices, BMS/PLC interfaces, fire-alarm connections and access-control interfaces. Findings distinguish what has been proven from what requires mechanical, OEM or software specialist input.
Electrical infrastructure
- Supply and protection
- Isolators
- Circuit condition
- Continuity and insulation resistance
Control hardware
- Panels
- Relays and contactors
- Overloads and timers
- Terminals and control power supplies
Field & plant connection
- Sensors and actuators
- Motors and drives
- Status contacts
- Field wiring
Connected systems
- BMS
- PLC
- Fire alarm
- Access control
- Agreed hardwired interfaces
Live operational environments
Controlled investigation without unnecessary disruption.
Safe isolation & make-safe action
Agreed isolation or stabilisation where required before further diagnostic or remedial work.
Operational testing
Testing planned around active buildings, critical loads and safe access arrangements.
Specialist coordination
Working with FM, mechanical, controls and specialist providers where their input is required.
Clear technical records
Recording test results, restoration, findings and outstanding actions.
Fault boundaries
Separate electrical evidence from mechanical or software assumptions.
ElectroLogic can identify whether the confirmed issue is electrical supply, protection, control hardware, field wiring, a connected interface or plant response. Mechanical repair, controller programming, BMS configuration and OEM parameter changes are referred or coordinated with the appropriate specialist.
Prove the electrical condition. Escalate specialist work with clear evidence.
Supply proven
Protection condition checked
Command present
Control hardware responding
Field wiring intact
Equipment response checked
Feedback confirmed
Specialist boundary identified
Technical support process
Understand, make safe, investigate, repair or escalate, verify and report.
- 01
Understand
Confirm symptoms, operational impact and the expected outcome.
- 02
Make safe
Isolate or stabilise agreed affected equipment where required.
- 03
Investigate
Trace the relevant electrical, control and feedback path.
- 04
Repair or escalate
Complete confirmed electrical work or provide evidence-led specialist recommendations.
- 05
Verify & report
Test completed work, document findings and set out next actions.
Technical support
Need help with a difficult electrical or controls fault?
Share the symptoms, affected equipment, operational impact and any available drawings or test history. ElectroLogic can review the electrical scope and establish the next practical diagnostic step.