Breeze KB 1000, Руководство пользователя, Страница: 22 / 26

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USER’S MANUAL
FCS-FCD | BCS-BCD SERIES
23
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• Motor fails to start
• Blown fuses
Check and reset overload in starter.
• Improper power supply • Check to see that power supplied agrees with motor
nameplate and load factor.
Check connections with diagram supplied with motor.
• Open circuit in winding or control
switch • Indicated by humming sound when switch is closed.
Check for loose wiring connections. Also verify all control
contacts are closing.
• Mechanical failure • Check to see if motor and drive turn freely. Check bearings
and lubrication.
Indicated by blown fuses. Motor must be rewound.
Remove end bells, locate with test lamp.
• Impeller defective
• Motor may be overloaded
• Motor stalls
• One phase may be open
• Wrong application
• Overload motor
• Low motor voltage See that nameplate voltage is maintained. Check connection.
• Open circuit Fuses blown, check overload relay, stator and push buttons.
• Motor runs and then dies
down • Power failure Check for loose connections to line, to fuses and to control.
• Motor does not come
up to speed
• Not applied properly
• Voltage too low at motor
terminals because of line drop Use higher voltage on transformer terminals or reduce load.
Check connections. Check conductors for proper size.
• Starting load too high
• Broken impeller blade(s)
or loose impeller Look for cracks near the rings. A new impeller may be
required as repairs are usually temporary.
• Open primary circuit
•
Motor takes too long
to accelerate
• Excess loading
• Poor circuit
• Defective motor
• Applied voltage too low
• Wrong rotation
• Motor overheats while
running under load
• Overloaded
• Frame or bracket vents may be
clogged with dirt and prevent
proper ventilation of motor Open vent holes and check for a continuous stream of air
from the motor.
• Motor may have one phase open
Check to make sure that all leads are well connected.
• Grounded coil
• Unbalanced terminal voltage
FAILURE CAUSE REMEDY
Replace fuses with proper type and rating.
7. TROUBLE SHOOTING TABLE
• Overload trips
• Improper line connections
• Short circuited stator
• Poor stator coil connection
Look for broken bars or end rings.
Reduce load.
Check lines for open phase.
Change type or size. Consult manufacturer.
Reduce load.
Consult supplier for proper type.
Check what load motor is supposed to carry at start.
Locate fault with testing device and repair.
Reduce load.
Check for high resistance.
Replace with new motor.
Get power company to increase power tap.
Reverse connections at motor or at switchboard. Wrong sequence of phases
Reduce load.
Locate and repair.
Check for faulty leads, connections and transformers.
• Motor vibrates after
corrections have been
made
• Motor misaligned
• Weak support
• Coupling out of balance
• Driven equipment unbalanced Rebalance driven equipment.
• Defective ball bearing
Realign.
Strengthen base.
Balance coupling.
Replace bearing.
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