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Fault Display
FAN1
Fan Fault 1
OL1
Motor Overloaded
OL3
Overtorque Det 1
OL4
Overtorque Det 2
UL3
Undertorque Det 1
UL4
Undertorque Det 2
PGO
PG Open
DEV
Speed Deviation
OS
Overspeed Det
-4
7
Table 7.1 List of Drive Faults (Continued)
*
Fault Details
Rank
Cooling fan fault 1(input terminal DI_2)
A fault detected from a contact input termi-
nal on the control board.
F
Note: Check the actual external terminal number with the
elementary wiring diagram. The external terminal
number varies for each Matrix converter. When
using more than one cooling fan, faults may be
found in multiple contact input terminals (FAN2 to
4).
Motor Overload
(Operation selection – L1-04)
F/A
The motor overload protection function has
operated based on the internal electronic
thermal value.
Overtorque Detected 1
(Operation selection – L6-01)
F/A
The torque has exceeded the overtorque
detection level 1 (L6-02) for the detection
time (L6-03) or longer.
Overtorque Detected 2
(Operation selection – L6-04)
F/A
The torque has exceeded the overtorque
detection level 2 (L6-05) for the detection
time (L6-06) or longer.
Undertorque Detected 1
(Operation selection – L6-01)
F/A
The torque has dropped below the under-
torque detection level (L6-02) for the detec-
tion time (L6-03) or longer.
Undertorque Detected 2
(Operation selection – L6-04)
F/A
The torque has dropped below the under-
torque detection level (L6-05) for the detec-
tion time (L6-06) or longer.
PG Disconnection Detected
(Operation selection – H7-02)
F/A
PG pulses were input when the Matrix con-
verter was outputting a frequency.
Excessive Speed Deviation
(Operation selection – H7-04)
F/A
The speed deviation has been greater than
the setting in H7-10 for longer than the set-
ting in H7-11.
Overspeed
The speed has been greater than the setting
F
in H7-08 for longer than the setting in H7-
09.
Corrective Actions
• Check the cooling fan's operation and the
contact input terminal status.
• Replace the cooling fan or the ventilation
louver. (Normally, input terminals need to
be activated within 10 seconds after fan
operating commands (both on and off)
are sent.
• Check the Motor Rated Current (E2-02).
• Confirm that the settings of detection
(L1-02, L1-06, and L1-07) are appropri-
ate.
• Check the size of the load and the length
of the acceleration, deceleration, and
cycle times.
• Make sure that the settings in L6-02 and
L6-03 are appropriate.
• Check the mechanical system and correct
the cause of the overtorque.
• Make sure that the current setting in L6-
05 and time setting in L6-06 are appropri-
ate.
• Check the mechanical system and correct
the cause of the overtorque.
• Make sure that the settings in L6-02 and
L6-03 are appropriate.
• Check the mechanical system and correct
the cause of the overtorque.
• Make sure that the current setting in L6-
05 and time setting in L6-06 are appropri-
ate.
• Check the mechanical system and correct
the cause of the overtorque.
• Fix the wiring.
• Supply power to the PG properly.
• Check the PG itself (output).
• Reduce the load.
• Lengthen the acceleration time and decel-
eration time.
Constant: C1-
• Check the settings in H7-10 and H7-11.
• Check the settings in H7-08 and H7-09.
• Make sure that the motor constants are
appropriate.
Constant: E-
, E2-
• Check the mechanical system and correct
the cause of the overtorque.
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Table of Contents
Troubleshooting
