Fault finding and commissioning
Rapid diagnosis and troubleshooting of PLC, VFD and control system faults to minimise downtime and restore operations.
Request a quote: Fault finding & commissioning
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What we help with

- PLC, drive and control faults
- Intermittent faults and nuisance trips
- Commissioning of new or replacement equipment
- Advice on what to replace and what to keep
How we handle fault finding & commissioning requests
Fix the cause, not just the symptom
Replacing the failed part does not always fix the problem. We trace the fault so it does not come back.
About fault finding & commissioning from Precision Spares
When a machine stops, the pressure to get it running again is intense — but replacing components without diagnosing the root cause often leads to repeated failures and escalating costs. Our fault-finding and commissioning service takes a systematic approach to diagnosing why a system is not working, tracing the fault through the control system, the drive, the motor and the process to identify the true cause. We work across PLCs, VFDs and complete control systems from all major brands, providing South African plants with experienced diagnostic support when downtime is at its most expensive.
Effective fault finding requires more than swapping parts. Intermittent faults that occur only under certain conditions, nuisance trips that reset and then recur, and complex interactions between drives and mechanical systems all demand a methodical diagnostic approach. Our engineers use a combination of experience, diagnostic tools and systematic testing to isolate the fault — whether it is a failed I/O module, a parameter that has drifted, a developing motor insulation fault or a wiring issue inside the panel. We document what we find and provide recommendations to prevent the recurrence, so the fix lasts longer than the next shift change.
Commissioning is the other side of our service: setting up new or replacement equipment so it runs correctly from the start. Proper commissioning verifies that the drive parameters match the motor and the mechanical load, that the PLC I/O is wired and functioning as intended, and that the system operates safely and efficiently under all expected conditions. We commission drives, PLCs, complete control panels and automated machines, providing functional testing and handover documentation. For urgent breakdowns, we prioritise response and can attend site quickly to get your plant back in production with minimum delay.
Common questions
Can you help before I order a spare?
Yes. Describe the fault and we will help you decide what is actually failing.
What information do you need to diagnose a fault?
The symptoms, any alarm codes, what the machine was doing when it faulted, and photos or videos of the fault all help.
Can you help with intermittent faults?
Yes. Intermittent faults are often the hardest to find. We can monitor the system and trace the root cause.
Do you offer on-site fault finding?
Yes. Our engineers can attend site to diagnose and resolve faults on your equipment.
Can you commission a new drive or PLC?
Yes. We handle parameter setup, motor identification, I/O checking and functional testing.
What is the difference between fault finding and commissioning?
Fault finding diagnoses why something is not working. Commissioning sets up and verifies new or replacement equipment.
Can you help with nuisance trips on my drive?
Yes. Nuisance trips are often caused by parameter settings, cabling issues or a developing fault. We trace the cause.
Do you provide a report after fault finding?
Yes. We document what we found, what was done and any recommendations to prevent a repeat.
Can you help with a machine that stopped after a power outage?
Yes. Power events often cause parameter loss or hardware damage. We can diagnose and restore the system.
How quickly can you respond to a breakdown?
We prioritise machine-down situations. Contact us and we will confirm the fastest way to get an engineer involved.
Can you test a repaired drive before I install it?
In many cases yes. We can test drives and other equipment to verify the repair before it goes back in service.
Ready to request a quote?
Send the part number or a photo of the nameplate for fault finding & commissioning. An engineer replies with availability, source, condition and lead time.
Request a quote: Fault finding & commissioning
Tell us what you need. An engineer replies with availability, lead time and price.
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Need it urgently?
Call or WhatsApp the nameplate. Every day, 07:00 to 17:00. Part discontinued? How we source obsolete parts.
