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Excessive Noise
AFSW-M41
Cause: Bearings
Corrective Action: Replace defective bearing(s). Lubricate bearings. Tighten collars and fasteners.
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Excessive Noise
AFSW-M41
Cause: V-Belt Drive
Corrective Action: Tighten Sheaves on motor/fan shaft. Adjust belt tension. Align sheaves properly. Replace worn belts or sheaves.
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Excessive Noise
AFSW-M41
Cause: Wheel Rubbing - Inlet
Corrective Action: Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft.
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Excessive Noise
AFSW-M41
Cause: Wheel Unbalance
Corrective Action: Clean all dirt off wheel. Check wheel balance, rebalance in place if necessary.
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Excessive Vibration
AFSW-M41
Cause: Belts
Corrective Action: Adjust tightness of belts. Replacement belts should be a matched set.
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Excessive Vibration
AFSW-M41
Cause: Coupling Misalignment
Corrective Action: Check alignment between coupling, motor and fan shafts. Any adjustments should be made per coupling manufacturer’s instructions. Shim only under motor.
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Excessive Vibration
AFSW-M41
Cause: System Unbalance
Corrective Action: Check alignment of shaft, motor and pulleys. Adjustable pitch pulleys with motors over 15 HP are especially prone to unbalance. Check wheel balance, rebalance if necessary.
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Fan Doesn't Operate
AFSW-M41
Cause: Drive
Corrective Action: Check for broken belts. Tighten loose pulleys.
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Fan Doesn't Operate
AFSW-M41
Cause: Electrical Supply
Corrective Action: Check fuses/circuit breakers. Check for switches turned off or disconnected. Check for correct supply voltage.
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Fan Doesn't Operate
AFSW-M41
Cause: Motor
Corrective Action: Assure motor is correct horsepower and not tripping overload protector.
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High CFM
AFSW-M41
Cause: Duct System
Corrective Action: Resize ductwork. Access door, filters, grilles not installed.
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High CFM
AFSW-M41
Cause: Fan
Corrective Action: Decrease fan speed.
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High Horsepower
AFSW-M41
Cause: Duct System
Corrective Action: Resize ductwork. Check proper operation of face and bypass dampers. Check filters and access doors.
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High Horsepower
AFSW-M41
Cause: Fan
Corrective Action: Check rotation of wheel. Reduce fan speed.
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Low CFM
AFSW-M41
Cause: Duct System
Corrective Action:
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Low CFM
AFSW-M41
Cause: Fan
Corrective Action: Check wheel for correct rotation. Increase fan speed.
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Overheated Shaft Bearing
AFSW-M41
Cause: Lubrication
Corrective Action: Check for excessive or insufficient grease in the bearings.
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Overheated Shaft Bearing
AFSW-M41
Cause: Mechanical
Corrective Action: Replace damaged bearing. Relieve excessive belt tension. Align bearings. Check for bent shaft.
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Static Pressure Wrong
AFSW-M41
Cause: Duct system has more or less restriction than anticipated
Corrective Action: Change obstructions in system. Use correction factor to adjust for temperature/altitude. Resize ductwork. Clean filters/coils. Change fan speed.
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Excessive Noise
BDW-M
Cause: Bearings
Corrective Action:
Replace defective bearing(s). Lubricate bearings.
Tighten collars and fasteners.
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Excessive Noise
BDW-M
Cause: V-Belt Drive
Corrective Action:
Tighten Sheaves on motor/fan shaft. Adjust belt tension.
Align sheaves properly.
Replace worn belts or sheaves.
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Excessive Noise
BDW-M
Cause: Wheel Rubbing - Inlet
Corrective Action:
Adjust wheel and/or inlet cone.
Tighten wheel hub or bearing collars on shaft.
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Excessive Noise
BDW-M
Cause: Wheel Unbalance
Corrective Action: Clean all dirt off wheel. Check wheel balance, rebalance in place if necessary.
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Excessive Vibration
BDW-M
Cause: Belts
Corrective Action: Adjust tightness of belts. Replacement belts should be a matched set.
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Excessive Vibration
BDW-M
Cause: Coupling Misalignment
Corrective Action: Check alignment between coupling, motor and fan shafts. Any adjustments should be made per coupling manufacturer’s instructions. Shim only under motor.
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Excessive Vibration
BDW-M
Cause: System Unbalance
Corrective Action: Check alignment of shaft, motor and pulleys. Adjustable pitch pulleys with motors over 15 HP are especially prone to unbalance. Check wheel balance, rebalance if necessary.
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Fan Doesn't Operate
BDW-M
Cause: Drive
Corrective Action: Check for broken belts. Tighten loose pulleys.
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Fan Doesn't Operate
BDW-M
Cause: Electrical Supply
Corrective Action: Check fuses/circuit breakers. Check for switches turned off or disconnected. Check for correct supply voltage.
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Fan Doesn't Operate
BDW-M
Cause: Motor
Corrective Action: Assure motor is correct horsepower and not tripping overload protector.
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High CFM
BDW-M
Cause: Duct System
Corrective Action: Resize ductwork. Access door, filters, grilles not installed.
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High CFM
BDW-M
Cause: Fan
Corrective Action: Decrease fan speed.
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High Horsepower
BDW-M
Cause: Duct System
Corrective Action: Resize ductwork. Check proper operation of face and bypass dampers. Check filters and access doors.
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High Horsepower
BDW-M
Cause: Fan
Corrective Action: Check rotation of wheel. Reduce fan speed.
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Low CFM
BDW-M
Cause: Duct System
Corrective Action:
|
Low CFM
BDW-M
Cause: Fan
Corrective Action: Check wheel for correct rotation. Increase fan speed.
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Overheated Shaft Bearing
BDW-M
Cause: Lubrication
Corrective Action: Check for excessive or insufficient grease in the bearings.
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Overheated Shaft Bearing
BDW-M
Cause: Mechanical
Corrective Action: Replace damaged bearing. Relieve excessive belt tension. Align bearings. Check for bent shaft.
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Static Pressure Wrong
BDW-M
Cause: Duct system has more or less restriction than anticipated
Corrective Action: Change obstructions in system. Use correction factor to adjust for temperature/altitude. Resize ductwork. Clean filters/coils. Change fan speed.
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Excessive Noise
BISW-M41
Cause: Bearings
Corrective Action: Replace defective bearing(s). Lubricate bearings. Tighten collars and fasteners.
|
Excessive Noise
BISW-M41
Cause: V-Belt Drive
Corrective Action: Tighten Sheaves on motor/fan shaft. Adjust belt tension. Align sheaves properly. Replace worn belts or sheaves.
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Excessive Noise
BISW-M41
Cause: Wheel Rubbing - Inlet
Corrective Action: Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft.
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Excessive Noise
BISW-M41
Cause: Wheel Unbalance
Corrective Action: Clean all dirt off wheel. Check wheel balance, rebalance in place if necessary.
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Excessive Vibration
BISW-M41
Cause: Belts
Corrective Action: Adjust tightness of belts. Replacement belts should be a matched set.
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Excessive Vibration
BISW-M41
Cause: Coupling Misalignment
Corrective Action: Check alignment between coupling, motor and fan shafts. Any adjustments should be made per coupling manufacturer’s instructions. Shim only under motor.
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Excessive Vibration
BISW-M41
Cause: System Unbalance
Corrective Action: Check alignment of shaft, motor and pulleys. Adjustable pitch pulleys with motors over 15 HP are especially prone to unbalance. Check wheel balance, rebalance if necessary.
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Fan Doesn't Operate
BISW-M41
Cause: Drive
Corrective Action: Check for broken belts. Tighten loose pulleys.
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Fan Doesn't Operate
BISW-M41
Cause: Electrical Supply
Corrective Action: Check fuses/circuit breakers. Check for switches turned off or disconnected. Check for correct supply voltage.
|
Fan Doesn't Operate
BISW-M41
Cause: Motor
Corrective Action: Assure motor is correct horsepower and not tripping overload protector.
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High CFM
BISW-M41
Cause: Duct System
Corrective Action: Resize ductwork. Access door, filters, grilles not installed.
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High CFM
BISW-M41
Cause: Fan
Corrective Action: Decrease fan speed.
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High Horsepower
BISW-M41
Cause: Duct System
Corrective Action: Resize ductwork. Check proper operation of face and bypass dampers. Check filters and access doors.
|
High Horsepower
BISW-M41
Cause: Fan
Corrective Action: Check rotation of wheel. Reduce fan speed.
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Low CFM
BISW-M41
Cause: Duct System
Corrective Action:
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Low CFM
BISW-M41
Cause: Fan
Corrective Action: Check wheel for correct rotation. Increase fan speed.
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Overheated Shaft Bearing
BISW-M41
Cause: Lubrication
Corrective Action: Check for excessive or insufficient grease in the bearings.
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Overheated Shaft Bearing
BISW-M41
Cause: Mechanical
Corrective Action: Replace damaged bearing. Relieve excessive belt tension. Align bearings. Check for bent shaft.
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Static Pressure Wrong
BISW-M41
Cause: Duct system has more or less restriction than anticipated
Corrective Action: Change obstructions in system. Use correction factor to adjust for temperature/altitude. Resize ductwork. Clean filters/coils. Change fan speed.
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Excessive noise or vibration
BSQ-M
Cause: Bad bearings
Corrective Action: Replace.
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Excessive noise or vibration
BSQ-M
Cause: Belts too tight or too loose
Corrective Action: Adjust tension.
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Excessive noise or vibration
BSQ-M
Cause: Foreign objects in wheel or housing
Corrective Action: Remove objects, check for damage or unbalance.
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Excessive noise or vibration
BSQ-M
Cause: Loose drive or motor pulleys
Corrective Action: Align and tighten.
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Excessive noise or vibration
BSQ-M
Cause: Wheel improperly aligned and rubbing
Corrective Action: Center wheel on inlet.
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Excessive noise or vibration
BSQ-M
Cause: Wheel unbalance
Corrective Action: Clean all dirt off wheel. Check wheel balance, rebalance in place if necessary
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Reduced airflow
BSQ-M
Cause: Excessive dirt buildup on wheels
Corrective Action: Clean wheel.
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Reduced airflow
BSQ-M
Cause: Improper wheel alignment
Corrective Action: Center wheel on inlet.
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Reduced airflow
BSQ-M
Cause: System resistance too high
Corrective Action: Check system: Proper operation of backdraft or control dampers, obstruction in ductwork, clean dirty filters.
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Reduced airflow
BSQ-M
Cause: Unit running backwards
Corrective Action: Correct, rotation should be clockwise and correspond to the rotation decal on the unit.
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Excessive Noise
FDW-M
Cause: Bearings
Corrective Action: Replace defective bearing(s). Lubricate bearings. Tighten collars and fasteners.
|
Excessive Noise
FDW-M
Cause: V-Belt Drive
Corrective Action: Tighten Sheaves on motor/fan shaft. Adjust belt tension. Align sheaves properly. Replace worn belts or sheaves.
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Excessive Noise
FDW-M
Cause: Wheel Rubbing - Inlet
Corrective Action: Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft.
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Excessive Noise
FDW-M
Cause: Wheel Unbalance
Corrective Action: Clean all dirt off wheel. Check wheel balance, rebalance in place if necessary.
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Excessive Vibration
FDW-M
Cause: Belts
Corrective Action: Adjust tightness of belts. Replacement belts should be a matched set.
|
Excessive Vibration
FDW-M
Cause: Coupling Misalignment
Corrective Action: Check alignment between coupling, motor and fan shafts. Any adjustments should be made per coupling manufacturer’s instructions. Shim only under motor.
|
Excessive Vibration
FDW-M
Cause: System Unbalance
Corrective Action: Check alignment of shaft, motor and pulleys. Adjustable pitch pulleys with motors over 15 HP are especially prone to unbalance. Check wheel balance, rebalance if necessary.
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Fan Doesn't Operate
FDW-M
Cause: Drive
Corrective Action: Check for broken belts. Tighten loose pulleys.
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Fan Doesn't Operate
FDW-M
Cause: Electrical Supply
Corrective Action: Check fuses/circuit breakers. Check for switches turned off or disconnected. Check for correct supply voltage.
|
Fan Doesn't Operate
FDW-M
Cause: Motor
Corrective Action: Assure motor is correct horsepower and not tripping overload protector.
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High CFM
FDW-M
Cause: Duct System
Corrective Action: Resize ductwork. Access door, filters, grilles not installed.
|
High CFM
FDW-M
Cause: Fan
Corrective Action: Decrease fan speed.
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High Horsepower
FDW-M
Cause: Duct System
Corrective Action: Resize ductwork. Check proper operation of face and bypass dampers. Check filters and access doors.
|
High Horsepower
FDW-M
Cause: Fan
Corrective Action: Check rotation of wheel. Reduce fan speed.
|
Low CFM
FDW-M
Cause: Duct System
Corrective Action:
|
Low CFM
FDW-M
Cause: Fan
Corrective Action: Check wheel for correct rotation. Increase fan speed.
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Overheated Shaft Bearing
FDW-M
Cause: Lubrication
Corrective Action: Check for excessive or insufficient grease in the bearings.
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Overheated Shaft Bearing
FDW-M
Cause: Mechanical
Corrective Action: Replace damaged bearing. Relieve excessive belt tension. Align bearings. Check for bent shaft.
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Static Pressure Wrong
FDW-M
Cause: Duct system has more or less restriction than anticipated
Corrective Action: Change obstructions in system. Use correction factor to adjust for temperature/altitude. Resize ductwork. Clean filters/coils. Change fan speed.
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Excessive noise or vibration
GB-M
Cause: Bad bearings
Corrective Action: Replace.
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Excessive noise or vibration
GB-M
Cause: Bearings
Corrective Action: Replace defective bearing(s). Lubricate bearings. Tighten collars and fasteners.
|
Excessive noise or vibration
GB-M
Cause: Belts too tight or too loose
Corrective Action: Adjust tension.
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Excessive noise or vibration
GB-M
Cause: Defective or loose motor bearings
Corrective Action: Replace motor with same frame size, RPM-HP
|
Excessive noise or vibration
GB-M
Cause: Fan base not securely anchored
Corrective Action: Secure properly.
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Excessive noise or vibration
GB-M
Cause: Foreign objects in wheel or housing
Corrective Action: Remove objects, check for damage or unbalance.
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Excessive noise or vibration
GB-M
Cause: Loose drive or motor pulleys
Corrective Action: Align and tighten.
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Excessive noise or vibration
GB-M
Cause: Motor hood loose and rattling
Corrective Action: Tighten acorn nuts securing motor hood.
|
Excessive noise or vibration
GB-M
Cause: V-belt drive
Corrective Action: Tighten pulleys on motor/fan shaft. Adjust belt tension. Align pulleys properly. Replace worn belts or pulleys.
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Excessive noise or vibration
GB-M
Cause: Wheel improperly aligned and rubbing
Corrective Action: Center wheel on inlet.
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Excessive noise or vibration
GB-M
Cause: Wheel rubbing inlet
Corrective Action: Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft
|
Excessive noise or vibration
GB-M
Cause: Wheel unbalance
Corrective Action: Clean all dirt off wheel. Check wheel balance, rebalance in place if necessary.
|
Fan does not operate
GB-M
Cause: Drive
Corrective Action: Check for broken belts. Tighten loose pulleys.
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Fan does not operate
GB-M
Cause: Electrical supply
Corrective Action: Check fuses/circuit breakers. Check for switches off. Check for correct supply voltage.
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Fan does not operate
GB-M
Cause: Motor
Corrective Action: Assure motor is correct horsepower and not tripping overload protector.
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High horsepower
GB-M
Cause: Duct System
Corrective Action: Resize ductwork. Check proper operation of face and bypass dampers. Check filters and access doors.
|
High horsepower
GB-M
Cause: Fan
Corrective Action: Check rotation of wheel. Reduce fan speed.
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Motor overloads or overheats
GB-M
Cause: Belt slippage
Corrective Action: Adjust tension or replace bad belts.
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Motor overloads or overheats
GB-M
Cause: Incorrect wheel rotation
Corrective Action: Check motor wiring.
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Motor overloads or overheats
GB-M
Cause: Lubrication
Corrective Action: Check for excessive or insufficient grease in the bearing.
|
Motor overloads or overheats
GB-M
Cause: Mechanical
Corrective Action: Replace damaged bearing. Relieve excessive belt tension. Align bearings. Check for bent shaft.
|
Motor overloads or overheats
GB-M
Cause: Motor wired incorrectly
Corrective Action: Check motor wiring to wiring diagram located on fan motor.
|
Motor overloads or overheats
GB-M
Cause: Over/Under line voltage
Corrective Action: Contact power company.
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Motor overloads or overheats
GB-M
Cause: Undersized motor
Corrective Action: Check motor ratings with catalog speed and air capacity chart.
|
Motor overloads or overheats
GB-M
Cause: Wheel RPM too high
Corrective Action: Check drives or slow down fan by opening variable pitch pulley on motor shaft.
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Reduced airflow
GB-M
Cause: Belt slippage
Corrective Action: Replace and adjust tension.
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Reduced airflow
GB-M
Cause: Blocked duct/clogged filter
Corrective Action: Clean or replace.
|
Reduced airflow
GB-M
Cause: Dampers closed
Corrective Action: Inspect and repair.
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Reduced airflow
GB-M
Cause: Excessive dirt buildup on wheels
Corrective Action: Clean wheel.
|
Reduced airflow
GB-M
Cause: Improper wheel alignment
Corrective Action: Center wheel on inlets.
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Reduced airflow
GB-M
Cause: Speed too slow
Corrective Action: Check for correct drives.
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Reduced airflow
GB-M
Cause: System resistance too high
Corrective Action: Check system: Proper operation of backdraft or control dampers, obstruction in ductwork, clean dirty filters.
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Reduced airflow
GB-M
Cause: Unit running backwards
Corrective Action: Correc.
|
Bearings overheated
QEI
Cause: Lubrication
Corrective Action: Check for excessive or insufficient grease in the bearing.
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Bearings overheated
QEI
Cause: Mechanical
Corrective Action: Replace damaged bearing. Relieve excessive belt tension. Align bearings. Check for bent shaft.
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Excessive noise
QEI
Cause: Bearings
Corrective Action: Replace defective bearing(s). Lubricate bearings. Tighten collars and fasteners.
|
Excessive noise
QEI
Cause: V-belt Drive
Corrective Action: Tighten sheaves on motor/fan shaft. Adjust belt tension. Align sheaves properly. Replace worn belts or sheaves.
|
Excessive noise
QEI
Cause: Wheel rubbing inlet
Corrective Action: Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft.
|
Excessive noise
QEI
Cause: Wheel unbalance
Corrective Action: Clean all dirt off wheel. Check wheel balance, rebalance in-place if necessary.
|
Excessive power consumption High horsepower
QEI
Cause: Duct system
Corrective Action: Resize ductwork. Check proper operation of face and bypass dampers. Check filters and access doors.
|
Excessive power consumption High horsepower
QEI
Cause: Fan
Corrective Action: Check rotation of wheel.
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Excessive vibration
QEI
Cause: Belts
Corrective Action: Adjust tightness of belts. Replacement belts should be a matched set.
|
Excessive vibration
QEI
Cause: System unbalance
Corrective Action: Check alignment of shaft, motor and pulleys. Adjustable pitch pulleys with motors over 15 hp motors are especially prone to unbalance. Check wheel balance, rebalance if necessary.
|
Fan doesn't operate
QEI
Cause: Drive
Corrective Action: Check for broken belts. Tighten loose pulleys.
|
Fan doesn't operate
QEI
Cause: Electrical supply
Corrective Action: Check fuses/circuit breakers. Check for switches turned off or disconnected. Check for correct supply voltage.
|
Fan doesn't operate
QEI
Cause: Motor
Corrective Action: Assure motor is correct horsepower and not tripping overload protector.
|
Static pressure wrong
QEI
Cause: Duct system has more or less restriction than anticipated
Corrective Action: Change obstructions in system. Use correction factor to adjust for temperature/altitude. Resize ductwork. Clean filters/coils. Change fan speed.
|
Volume too high
QEI
Cause: Duct system
Corrective Action: Resize ductwork. Access door, filters, grilles not installed.
|
Volume too high
QEI
Cause: Fan
Corrective Action: Decrease fan speed.
|
Volume too low
QEI
Cause: Duct system
Corrective Action: Resize ductwork. Access door, filters, grilles not installed.
|
Volume too low
QEI
Cause: Fan
Corrective Action: Check wheel for correct rotation. Increase fan speed.
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Excessive noise
SE1-M
Cause: Debris
Corrective Action: Remove all debris from the fan.
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Excessive noise
SE1-M
Cause: Defective motor
Corrective Action: Replace motor.
|
Excessive noise
SE1-M
Cause: Excessive vibration
Corrective Action: Clean dirt buildup from propeller. Check all setscrews and fasteners for tightness. Check for worn bearing. Correct propeller imbalance. Check for loose dampers, guards or ductwork.
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Fan does not operate
SE1-M
Cause: Electrical supply
Corrective Action: Check fuses/circuit breakers. Check for switches turned off or disconnected. Check for correct supply voltage.
|
Fan does not operate
SE1-M
Cause: Motor
Corrective Action: Assure motor is correct horsepower and not tripping overload protector.
|
Reduced airflow
SE1-M
Cause: Excessive dirt buildup on propeller
Corrective Action: Clean propeller.
|
Reduced airflow
SE1-M
Cause: Fan too close to damper
Corrective Action: Increase distance between fan and damper.
|
Reduced airflow
SE1-M
Cause: System resistance too high
Corrective Action: Check backdraft dampers for proper operation. Remove obstructions in ductwork. Clean dirty filters. Check for adequate supply air for exhaust fans or exhaust air for supply fans.
|
Excessive noise or vibration
SQ-M
Cause: Foreign objects in wheel or housing
Corrective Action: Remove objects, check for damage or unbalance.
|
Excessive noise or vibration
SQ-M
Cause: Wheel improperly aligned and rubbing
Corrective Action: Center wheel on inlet.
|
Excessive noise or vibration
SQ-M
Cause: Wheel unbalance
Corrective Action: Clean all dirt off wheel. Check wheel balance, rebalance in place if necessary
|
Reduced airflow
SQ-M
Cause: Excessive dirt buildup on wheels
Corrective Action: Clean wheel.
|
Reduced airflow
SQ-M
Cause: Improper wheel alignment
Corrective Action: Center wheel on inlet.
|
Reduced airflow
SQ-M
Cause: System resistance too high
Corrective Action: Check system: Proper operation of backdraft or control dampers, obstruction in ductwork, clean dirty filters.
|
Reduced airflow
SQ-M
Cause: Unit running backwards
Corrective Action: Correct, rotation should be clockwise and correspond to the rotation decal on the unit.
|
Excessive noise
SWB-M
Cause: Bearings
Corrective Action: Replace defective bearing(s). Lubricate bearings. Tighten collars and fasteners.
|
Excessive noise
SWB-M
Cause: V-Belt drive
Corrective Action: Tighten sheaves on motor/fan shaft. Adjust belt tension. Align sheaves properly. Replace worn belts or sheaves.
|
Excessive noise
SWB-M
Cause: Wheel rubbing inlet
Corrective Action: Adjust wheel and/or inlet cone. Tighten wheel hub or bearing collars on shaft.
|
Excessive noise
SWB-M
Cause: Wheel unbalance
Corrective Action: Clean all dirt off wheel. Check wheel balance, rebalance in place if necessary.
|
Fan doesn't operate
SWB-M
Cause: Drive
Corrective Action: Check for broken belts. Tighten loose pulleys.
|
Fan doesn't operate
SWB-M
Cause: Electrical supply
Corrective Action: Check fuses/circuit breakers. Check for switches off. Check for correct supply voltage.
|
Fan doesn't operate
SWB-M
Cause: Motor
Corrective Action: Assure motor is correct horsepower and not tripping overload protector.
|
High CFM
SWB-M
Cause: Duct system
Corrective Action: Resize ductwork. Access door, filters, grills not installed.
|
High CFM
SWB-M
Cause: Fan
Corrective Action: Decrease fan speed.
|
High horspower
SWB-M
Cause: Duct system
Corrective Action: Resize ductwork. Check proper operation of face and bypass dampers. Check filters and access doors.
|
High horspower
SWB-M
Cause: Fan
Corrective Action: Check rotation of wheel. Reduce fan speed.
|
Low CFM
SWB-M
Cause: Duct system
Corrective Action: Resize ductwork. Access door, filters, grills not installed.
|
Low CFM
SWB-M
Cause: Fan
Corrective Action: Check wheel for correct rotation. Increase fan speed.
|
Overheated bearing
SWB-M
Cause: Lubrication
Corrective Action: Check for excessive or insufficient grease in the bearing.
|
Overheated bearing
SWB-M
Cause: Mechanical
Corrective Action: Replace damaged bearing. Relieve excessive belt tension. Align bearings. Check for bent shaft.
|
Static pressure wrong
SWB-M
Cause: Duct system has more or less restriction than anticipated
Corrective Action: Change obstructions in system. Use correction factor to adjust for temperature/altitude. Resize ductwork. Clean filters/coils. Change fan speed.
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