Troubleshooting Guide - Fan Assembly - Trane GRAA Installation, Operation And Maintenance Manual

T T r r o o u u b b l l e e s s h h o o o o t t i i n n g g
Problem
Rapid Motor
Bearing Wear
Troubleshooting Guide — Fan Assembly
Problem
Short Belt Life
Belts turn over in
grooves
Belt Squeal
Belt Breakage
Excessive
Vibration
Belts mismatched
after service
46
Probable Solution
Cause
Bent motor shaft Replace motor.
Excessive
Reduce belt tension.
overhung load due
to over-tensioned
belt
Probable Solution
Cause
Spin burns from Tension belt.
belt slippage
High ambient Use Gripnotch belts.
temperature
Grease or oil on Clean belts and pulleys.
belts
Worn pulleys Replace pulleys.
Belt Misalignment Realign drive.
Damaged belt Replace belt.
Excessive vibration Tension belts. Replace belts if damaged.
Worn pulleys Replace pulleys.
Pulley Realign drive.
Misalignment
Excessive load High starting load. Retension drive.
Foreign material in Provide drive guard.
drive
Belts damaged Replace belts.
during installation
Extreme Overload Eliminate overload.
Damaged belt cord Replace belts.
section
Loose belts Tension drive.
Belts improperly Tension drive with slack of each belt on the
same side of drive.
tensioned
Belts improperly Replace belts and tension drive with slack of
tensioned, causing each belt on the same side of the drive.
more stretch of
some belts than
others
Old belts and new Replace with new belts.
belts used on same
drive
Different brand Replace with a set of machine-matched belts.
name belts used
on same drive
MUA-SVX003B-EN