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MA7200 PLUS Operating Manual
TECO – Westinghouse Motor Company Fault Messages, Causes and Remedies
Cont.
Table 10.1.1.1 Fault Messages, Causes and Remedies (
Cont
.)
LCD Display
(English)
Fault
Fault Description
Fault
Contact
Output
Fault Causes
Remedy
RS-485 Interrupt
MODBUS Communication fault
occurs .The inverter remains
operating.
ON
External noise
Excessive vibration or
impact Communication
wire.
Not properly connected
Check the parameter setting, including
Sn-01, Sn-02.
Check if the comm. wire for proper
connection.
Restart, if fault remains, contact your
representative.
Output Power
Loss
One of the inverter output phases
is lost. The motor coasts to stop.
ON
One of the inverter
output phases is lost.
DCCT fault.
Check the wiring between inverter and
motor.
Replace the DCCT.
Load Loss
Load Loss is detected when the
output current is smaller than the
setting of P3-01. (machine
protection)
ON
Machine errors or broken
belts.
Check the use of the machine. If
the load is connected by a belt,
also check the belt.
Set a lower detection level (P3-01)
or longer detection time (P3-02).
Over Feedback
Over feedback is detected while
the PID feedback signal is larger
than the setting of P3-04.
ON
The feedback level is
beyond the acceptable
level.
Improper feedback
detection level (P3-04)
Check the load, or the feedback
signal sensor.
Set a lower protection level (P3-04)
or longer detection time (P3-05).
Low Feedback
Low feedback is detected while
the PID feedback signal is smaller
than the setting of P3-07.
ON
The feedback level is
beyond the acceptable
level.
Improper feedback
detection level (P3-07)
Check the load, or the feedback
signal sensor.
Set a higher protection level (P3-
07) or longer detection time (P3-
08).
Low Suction
Low Suction is detected while the
output frequency approaches
maximum output frequency
(Cn-01) and;
1. PID error is larger than the
setting of the setting of P3-12
and / or:
2. the output current is smaller
the setting of the setting of
P3-13
ON
The pump breaks suction
or the pump loses the
water supply.
Check the pump system.
Low Suction
(Retry)
Low Suction is detected while the
output frequency approaches
maximum output frequency (Cn-
01) and;
1. PID error is larger than the
setting of the setting of P3-12
and / or:
2. The output current is smaller
the setting of the setting of
P3-13.After the time specified
by P3-15, this fault will be reset
automatically and inverter will
re-start.
ON
The pump breaks suction
or the pump losses the
water supply.
Check the pump system.