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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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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
Take it to site

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.

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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.