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FIELD DIAGNOSTIC GUIDES

Fan troubleshooting guides

Written by our service engineers from ten years of field work — on fans and blowers of any make. Symptom → how to diagnose it → the usual root causes → the fix → how to stop it coming back.
15 guidesISO 14694 · ISO 21940Any make
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In short

How do I diagnose a problem on an industrial fan?

Start from the symptom, not the part. These fifteen field guides each take one symptom - high vibration, abnormal noise, a motor tripping on high current, low airflow, a bearing running hot, a torn expansion joint, a slipping belt, a chewed coupling, impeller wear - and work through what you are seeing, what it usually means, how to confirm it and how to stop it coming back. They are written by our service engineers for fans of any make.

Field diagnostics

Choose your symptom

Each guide follows the same shape: what you are seeing → how to diagnose it → the usual root causes by lifecycle stage → the fix → how to stop it coming back.

High vibration after commissioning: how to find the real cause

DIAGNOSTICS · VIBRATION

Abnormal fan noise: tracing it to its mechanical source

DIAGNOSTICS · NOISE

High motor current and tripping: when it is not the fan

DIAGNOSTICS · MOTOR

Fan not making its duty: system effect and ducting

DIAGNOSTICS · AIRFLOW

Bearing wear and seizure: what actually kills fan bearings

MAINTENANCE · BEARINGS

Bearing running hot or noisy: is it really the grease?

MAINTENANCE · LUBRICATION

Bearing noise from day one: the clearance was set wrong at fitment

COMMISSIONING · BEARINGS

Coupling bushes chewing out: alignment, guards and wear

MAINTENANCE · COUPLING

Belt drives: slip, smoke, misalignment and premature wear

MAINTENANCE · BELT DRIVE

Impeller wear, erosion and cracking in abrasive duty: a field diagnosis guide

MAINTENANCE · IMPELLER

Fan commissioning and installation errors: the checks that prevent callbacks

COMMISSIONING

Damage found on arrival: transport, offloading and storage

TRANSPORT & HANDLING

Expansion joints and bellows: why they tear, and what really failed

ACCESSORIES · BELLOWS

Air and oil leaks: casing seams, flanges and seals

MAINTENANCE · LEAKS

High-temperature fans: heat slingers, coatings and thermal fatigue

HIGH TEMPERATURE
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The field card behind these guides

These 15 guides are the depth. The four-page installation & commissioning card is the field summary the engineer carries: delivery, lifting and storage checks, foundation, ducting and drive setup, the ten-point pre-start list and the bump-start rotation check, first-run bearing temperatures, then the running limits, re-greasing intervals and the impeller-cleaning schedule.

Page one of the Jitamitra fan installation and commissioning field cardFree download — no formFan Installation, Commissioning & OperationPrinted both sides and kept with the fan. Written for whoever is standing at the machine — every check in sequence, with the numbers, so nothing on site is left to memory.PDF·4 pages·0.8 MB·A4 — print both sidesDownload the card
Need a specialist?

When you want an engineer on it

Jitamitra services fans and blowers of any make — on-site balancing, vibration diagnosis, bearing and coupling replacement, re-rating and AMC. See our services, or talk to engineering.

Ready to quote?

Send us the duty point. We'll quote in 3 to 5 working days.*

Flow, static, gas temperature, application — or attach a spec, GA drawing or a multi-fan schedule. Engineer to engineer.

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ISO 9001:2015 quality system · performance-tested to IS 4894 / ISO 5801 / AMCA 210 method · witnessed FAT on request.

*For our standard range. ATEX and special projects need 5 to 7 working days.