Trane GXAA, Installation, Operation And Maintenance Manual

Page: 45 / 64

MUA-SVX006B-EN 45
Problem Probable
Cause
Solution
Bent motor shaft Replace motor.
Rapid Motor
Bearing Wear
Excessive
overhung load due
to over-tensioned
belt
Reduce belt tension.
Troubleshooting Guide — Fan Assembly
Problem Probable
Cause
Solution
Short Belt Life Spin burns from
belt slippage Tension belt.
High ambient
temperature
Use Gripnotch belts.
Grease or oil on
belts
Clean belts and pulleys.
Worn pulleys Replace pulleys.
Belt Misalignment Realign drive.
Belts turn over in
grooves
Damaged belt Replace belt.
Excessive vibration Tension belts. Replace belts if damaged.
Worn pulleys Replace pulleys.
Pulley
Misalignment Realign drive.
Belt Squeal Excessive load High starting load. Retension drive.
Belt Breakage Foreign material in
drive Provide drive guard.
Belts damaged
during installation Replace belts.
Extreme Overload Eliminate overload.
Excessive
Vibration
Damaged belt cord
section
Replace belts.
Loose belts Tension drive.
Belts improperly
tensioned Tension drive with slack of each belt on the
same side of drive.
Belts mismatched
after service
Belts improperly
tensioned, causing
more stretch of
some belts than
others
Replace belts and tension drive with slack of
each belt on the same side of the drive.
Old belts and new
belts used on same
drive
Replace with new belts.
Different brand
name belts used
on same drive
Replace with a set of machine-matched belts.
T Trro ou ub blle essh ho oo ottiin ng g