![background image](http://html.mh-extra.com/html/abb/ama-series/ama-series_manual_3508110.webp)
Manual for Induction Motors and Generators
Trouble Shooting -
95
3BFP 000 050 R0101 REV E
8.1.3 Thermal performance
***Following chapter for cooling type: Open air or ducted air
8.1.3.1 Thermal performance, open air cooling system
NOTE: For high bearing temperatures, see
Table 8.1.2 Lubrication system and bearings
.
Trouble shooting
Thermal performance
open air cooling system
H
igh
winding
te
m
p
erat
ure
H
igh
cooling
a
ir
te
m
p
erat
ure
z
z
Ambient temperature too high
Add ventilation to decrease ambient temperature
z
z
Exiting air is pulled back in
Ensure sufficient clear distances surrounding the machine
z
z
Heat source nearby
Place heat sources further away, check ventilation
z
z
Dirty machine interior
Clean machine parts and air gaps
z
z
Faulty cooling arrangement
Inspect cooling arrangement condition and correct assembly
z
z
Air intakes are blocked
Clear air intakes of debris
z
z
Air filter is clogged
Clean or replace air filters
z
z
Damaged cooling fan(s)
Replace fan(s)
z
z
Cooling fan rotating in the wrong direction
Replace fan(s) or change rotating direction of external fan
z
Overload
Control system setting
Check machine controls, eliminate overload
z
z
Overspeed
Check actual speed and ABB speed recommendations
z
Network unbalance
Check that network balance fulfils requirements
z
z
Faulty instrumentation or measurement system
Check measurements, sensors and wiring
z
Winding fault
Check windings
Faulty air flow
Experienced
malfunction
Possible cause
Corrective action
High intake air temperature