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Standard Operating Procedure for Cooling Tower Fan Maintenance

SOP Number: Hotel Engineering SOP  – 13

Department: Engineering and Maintenance

Date Issued: 24–Feb-2018

Time to Train: 30 Minutes

Cooling Tower Fan Maintenance Checklist and Procedure:

Required Tools:

  • Screwdriver.

  • Clamp meter.

  • Crimping Tool.

  • Megger.

  • Oil Can.

  • Grease Gun.

  • Plier.

  • Spanner Set.

  • Brush.

  • Bush.

  • Line Tester.

Consumable Parts:

  • PVC tape.

  • WD- 40.

  • Lubricating Oil.

  • Grease.

  • Carbon removing compound.

  • Old cleaning clothes.

Cooling Tower Fan Maintenance Activity:

Cooling Tower Fan :

  • Check the shaft position, in case if the shaft is loose tighten it.

  • Check the shaft alignment and fix it if required.

  • Check the key position and any loose key to be replaced or tightened.

  • Check the fan blade positions, any loose blades to be tightened.

  • Change or replace any broken fan or fan leaf.

  • Check the ball bearing and if required do oiling/greasing.

  • Change the bearing if it is noisy.

  • Check the oil level of the gear.

  • Check and verify the gear assembly, any broken teeth to be replaced.

  • Check the foundation and verify if it is broken/loose.


  • Motor Should be of minimum 30 HP.

  • Electrical control should be proper.

  • Check for any burnt contact, loose electrical connection and overall operation to be checked.

  • Overload relay should be checked.

  • Check the operation of the relay, setting and loose electrical connections.

  • Check the timer operation and time settings.

  • Check for any loose electrical connection.

  • Check for any loose & burnt electrical connection.

  • Check the MCB rating and verify with the recommended Amp.

  • Check Terminal Plate, Any burnt and broken plate need to be replaced.

  • Check the motor bearing.

  • Perform oiling, greasing or change the bearing if required.

  • Check the internal Resistance Value.

Other points to check:

  • Check at the full Load motor capacity should be 42 Amp.

  • Check and verify the overload relay setting should be 22 Amp.

  • Overload relay range should be between 14Amp to 23Amp.

  • Check and verify the control fuse rating at 4 Amp.

  • Check and verify the MCB rating should be at 250 Amp.

  • Check and verify the timer settings should be set at 10 sec.

Remarks by the Technician:



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Authored and managed by Augustine, a hotelier with over 20 years of experience in the industry. He has a 3-year diploma with 'honors' from the American Hotel & Lodging Educational Institute and a Bachelor of Computer Application - BCA Degree.