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
H
igh
winding
te
m
p
erat
ure
H
igh
cooling
a
ir
te
m
p
erat
ure
Water
leakage
a
la
rm
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
z
z
Faulty coolant pump
Check and repair the pump
z
z
Faulty flow regulator settings
Check and adjust coolant flow
z
z
z
Leaking cooler header
Replace the cooler header
z
z
Air inside the cooler
Bleed the cooler through bleeder screw
z
z
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
z
z
z
Faulty 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