Carrier Alarko 6 Instruction Manual page 43

Thermic relay is blown off Is there a phase cut
off? Check
No
Measure the voltage
on three phases.
Is there a fluctuation
on the voltage values
of the phases?
No
Is the thermal setting
correct? Check.
No
For direct startup mo-
tors, set the thermal
settigs to the ampere
value on the motor
label.
For star / delta startup
motors, set the thermal
setting to motor label
ampere value x 0,58 =
the ampere value that
the thermal relay shall
be set to.
Ensure that power
Yes
comes to the cut
off phase. Run the
pump
The voltage on three
Yes
phases must not de-
viateless than 10%
or more than 6% with
respect to the nominal
value. If it does, make
sure that the grid volta-
ge is brought to normal
value.
Does to motor draw
Yes
excessive current?
There might be a mec-
hanical
on the pump, stop the
pump.
Please call Alarko
Carrier Authorized
Service.
43
malfunction