6-1
6. Troubleshooting
6.1 Troubleshooting
Even if the same failure occurs, the cause and action may be different. In addition, there may be
two or more causes.
If the cause and action cannot be determined using the following table, stop the operation
immediately and contact a specialist company or the service center specified by the
manufacturer.
Caution
Request a specialist vendor or a service representative authorized
by the manufacturer for replacement of parts or repair.
Inappropriate repair work may lead to machine failure or accident.
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Symptom of failure
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Cause of failure
Insuffi
cient ai
rflow
Motor does not run
Excessive noise
Excessive vibration
Motor overload
Corrective action
Weak foundation
㩷
㩷
3
3
㩷
Reinforce foundation
Defective piping
3
㩷
3
3
㩷
Check / repair piping
Excessive duct resistance
3
㩷
3
3
㩷
Check duct installation
Insufficient duct resistance
㩷
㩷
3
㩷
㩷
Check duct installation
Low rotation speed
3
㩷
㩷
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㩷
Check voltage of power source
Wrong rotation direction
3
㩷
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Swap motor cables
Interference between rotating part
and stationary part
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3
3
3
3
Disassembly / Repair
Inclusion of foreign matter
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3
3
3
3
Disassembly / inside inspection
In appropriate installation
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㩷
3
3
㩷
Check installation
Power source related failure
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3
㩷
㩷
3
Inspection / repair
Failure of motor
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3
㩷
3
3
Repair the motor