Troubleshooting Machine Automation
When Minutes Matter, We Find the Fault Fast
Unplanned downtime is expensive. Our automation-savvy industrial electricians diagnose and resolve electrical and controls issues quickly—restoring production, protecting equipment, and preventing repeat failures.
Why Choose Pacific Quality Controls Inc. for Troubleshooting?
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Automation First: Electricians fluent in PLCs, motion, safety, and networks
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Methodical & Documented: Clear fault reports, cause, corrective action, and prevention steps
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Minimal Disruption: Work around shifts and production schedules
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Code & Safety Focus: NEC/NFPA/OSHA compliance baked into every fix
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Cross-Industry Experience: Packaging, food & beverage, plastics, metals, logistics, utilities, and more
What We Troubleshoot
Electrical Power Issues
Breakers, fuses, feeders, grounding, harmonics, voltage drops, nuisance trips
Drives & Motors
VFD faults, servo tuning, encoder feedback, soft starters, overloads
PLC/HMI/SCADA
Program faults, communication loss, I/O failures, tag mapping, logic conflicts
Sensors & Instrumentation
Proximity, photo-eye, analog signals, thermocouples, level/pressure/flow devices
Networks & Fieldbus
Ethernet/IP, Modbus, Profibus/Profinet, DeviceNet, remote I/O, industrial Wi-Fi
Safety Systems
E-stops, light curtains, safety relays/PLCs, interlocks, guarding verification
Robotics & Motion
Proximity, photo-eye, analog signals, thermoAxis faults, home/limit errors, tool center point, cell interlocks, safety zoningcouples, level/pressure/flow devices
Our Troubleshooting Process
Stabilize & Make Safe
Lockout/tagout, verify energy isolation, protect operators and equipment.
Gather Evidence
Fault codes, logs, I/O status, network diagnostics, recent changes.
Test Methodically
Segment power and control, simulate inputs, swap/loopback, known-good references.
Root-Cause Analysis
Differentiate symptom vs. source; electrical, mechanical, control, or process.
Fix & Verify
Correct wiring/logic, replace components, retune drives, update programs, run acceptance tests.
Prevent Recurrence
Document findings, recommend upgrades, add monitoring/alarms, train operators.
Frequently Asked Questions
Do you work on legacy equipment?
Yes—legacy PLCs/HMIs/drives with migration paths when parts are obsolete.
What if the issue reappears?
We include a defined warranty window on our work and offer follow-up tuning.
Can you provide support remotely?
Secure remote diagnostics are available where permitted by your IT policies.
Common Issues We Resolve
Tools & Diagnostics We Use
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Multimeters, insulation resistance & ground testers, power quality analyzers
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Oscilloscopes and signal tracers for high-speed events
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VFD/servo diagnostic software; robot teach pendants
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PLC programming suites (e.g., Rockwell, Siemens, Omron, Schneider)
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Protocol analyzers: Ethernet/IP, Modbus, Profinet, DeviceNet
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Thermal imaging for hotspots and loose terminations
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Data logging & trend analysis via SCADA/Historian
Before We Arrive
(Helps Us Help You)
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Note exact timestamps, alarm messages, and what changed before the fault
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Capture photos/videos of the HMI, drive faults, and indicator lights
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Ensure schematics and recent program backups are accessible
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Identify who can operate the line for tests and verifications
After-Action Deliverables
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Fault summary and root cause
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Corrective actions performed
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Risk assessment & priority list
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Recommendations (spares, firmware, surge/conditioning, program comments)
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Optional Preventive Maintenance schedule and monitoring plan