53
YES
Does
motor operate if
∧ key pressed
?
NO
Press ∧ to
set frequency
NO
Are connections
and circuits to terminals
11, 12, 13, or 11-C1
correct
?
YES
Replace defective
speed pot., signal
regulator, switch
or relay.
NO
Rectify
wiring error
NO
Are connections
and circuits to terminals
FWD-P24 or REV-P24
correct
?
YES
Rectify
defective switch
or relay
NO
Is there
a balanced voltage
at terminals
U, V, W
?
YES
Possible
malfunction
of inverter.
Consult IMO
Are
motor connections
and cabling
correct
?
NO
YES
Is
the load
too high
?
YES
Rectify
wiring
error
Possible motor
malfunction
NO
Is
torque boost
sufficient
?
YES
Increase setting of
Function 08 or 65
Motor is stalled.
Mechanical problem
or rotor locked.
NO
Is
a motor brake
installed
?
YES
Release
brake
NO
YES
Check Functions
30, 36 and 37
and set correctly
Are
upper Hz limit
and input Hz reference
below starting Hz
?
NOTES
1 If an external normally-open contact is not installed to provide
a RUN command signal, terminals FWD-P24 or REV-P24
must be linked.
2 If an external normally-closed protection contact is not installed,
terminals THR-P24 must be linked.
3 If a mechanical or electro-mechanical brake is fitted to the
motor, first ensure that the brake lifts correctly when a motor
RUN command is input.
The motor may in any case not start if —4
A RUN command is input when the motor is coasting to
rest on a BX-P24 command input;
A RUN command is input whilst a DC injection braking
command is active;
NO NO
Unsuitable values have been applied to Functions 04, 05, 08,
65, 70, 71, 72, 73, 75 or 76.
YES
?
STATUS QUERY ACTION
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