Alfa Laval S 921 - Page 40

7 Fault Finding 7.1 Mechanical Functions
7.1.6 Starting power to o hig h
Cause Corrective action
Incorrect transmission parts (60 Hz belt pulley
for 50 Hz power supply).
!
W
A
R
N
I
N
G
Stop and change the belt transmission to suit the
power supply freq uency.
Wrong direction of rotation.
Change electrical phase connections to the
motor.
7.1.7 Star ting power too low
Cause Corrective action
Incorrect transmission parts (50 Hz belt pulley
for 60 Hz power supply).
!
W
A
R
N
I
N
G
Stop and change the belt transmission to suit the
power supply freq uency.
Friction blocks are oily or worn.
Clean or renew friction blocks.
Motor failure.
Repair the motor.
7.1.8 Starting time too long
Cause Corrective action
Friction blocks are oily or worn.
Renew or clean friction blocks.
Height position of paring disc is incorrect.
Stop, check and adjust the height.
Motor failure.
Repair the motor.
Bearing
(s) damaged or worn.
Renew all bearings.
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