Manual for Induction Motors and Generators
Trouble Shooting - 97
3BFP 000 050 R0101 REV E
***Following chapter for cooling type: Air-to-water
8.1.3.3 Thermal performance, air-to-water cooling system
NOTE: For high bearing temperatures, see Table 8.1.2 Lubrication system and bearings.
Trouble shooting
Thermal performance
air-to-water cooling system
High winding temperature
High cooling air temperature
Water leakage alarm
z
z Damaged cooling fan Replace fan
z
z Fan rotating in wrong direction Change shaft mounted fan or correct external blower motor operation
z
z Dirty machine interior Clean machine parts and air gaps
z
z Coolant pipes are blocked Open cooler and clean pipes
zz Faulty coolant pump Check and repair the pump
zz Faulty flow regulator settings Check and adjust coolant flow
zzz Leaking cooler header Replace the cooler header
zz Air inside the cooler Bleed the cooler through bleeder screw
zz Emergency cooling hatch open Close emergency cooling hatch tightly
z
z
Cooling water inlet temperature too high
Adjust cooling water temperature
z
Overload
Control system setting Check machine controls, eliminate overload
z
Network unbalance Check that network balance fulfils requirements
zzzFaulty instrumentation or measurement system Check measurements, sensors and wiring
z Too many starts Let the machine cool down before restarting
z Winding fault Check windings
Low secondary cooling
circuit performance
Experienced
malfunction
Corrective action
Low primary cooling
circuit performance
Possible cause
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