20 | CFW701
Quick Parameter Reference, Faults and Alarms
English
Fault/Alarm Description Possible Causes
F0074:
Ground Fault
A ground fault occurred either in the
cable between the inverter and the
motor or in the motor itself.
Note:
It can be disabled by setting
P0343 = 0.
Short-circuit to the ground in one or more output
phases.
Motor cable capacitance is too large, resulting in current
peaks at the output.
F0076:
Motor Current
Unbalance
Fault of motor current unbalance.
Note:
It may be disabled by setting
P0342 = 0.
Loose connection or broken wiring between the motor
and inverter connection.
Vector control with wrong orientation.
Vector control with encoder, encoder wiring or encoder
motor connection inverted.
F0078:
Motor
Overtemperature
Fault related to the PTC temperature
sensor installed in the motor.
Note:
- It can be disabled by setting
P0351 = 0 or 3.
- An analog input and an analog
output must be set for the PTC
function.
Excessive load at the motor shaft.
Severe duty cycle (too many starts / stops per minute).
Too high surrounding air temperature.
Loose connection or short-circuit (resistance < 100 Ω) in
the wiring connected to the motor thermistors.
Not installed motor thermistors.
Blocked motor shaft.
F0080:
CPU Watchdog
Microcontroller watchdog fault. Electrical noise.
F0084:
Auto-Diagnosis
Fault
Auto-Diagnosis Fault. Defect in the inverter internal circuitry.
Firmware incompatible with an accessory.
A0090:
External Alarm
External alarm monitored through a
digital input.
Note:
It is necessary to program a digital
input for “No external alarm”.
A digital input (DI1 to DI8) programmed for “No external
alarm” is open.
F0091:
External Fault
External fault monitored through a
digital input.
Note:
It is necessary to program a digital
input for “No external fault”.
A digital input (DI1 to DI8) programmed for “No external
fault” is open.
A0098:
Activate General
Enable
General Enable signal is missing
during the self-tuning.
The digital input programmed for “General Enable”
is open.
F0099:
Invalid Current
Offset
The current measurement circuit is
presenting an abnormal value for
null current.
Defect in the inverter internal circuitry.
A0110:
High Motor
Temperature
Fault detected through PTC type
temperature sensors installed in
the motor.
Note:
- It can be disabled by setting
P0351 = 0 or 2.
- An analog input and an analog
output must be set for the PTC
function.
Excessive load at the motor shaft.
Severe duty cycle (too many starts / stops per minute).
Too high surrounding air temperature.
Not installed motor thermistors.
Blocked motor shaft.
A0128:
Serial
Communication
Timeout
It indicates that the inverter stopped
receiving valid telegrams during a
certain period.
Note:
It can be disabled by setting
P0314 = 0.0 s
Check the wiring and the ground installation.
Make sure that the inverter has sent a new message
within the time interval set at P0314.
F0150:
Motor Overspeed
Overspeed fault.
It trips when the actual
speed exceeds the value of
P0134 x
(100 % + P0132)
100 %
for more
than 20 ms.
Wrong settings of P0161 and/or P0162.
Problem with a hoist-type load.
F0151:
FLASH Memory
Module Fault
FLASH Memory Module (MMF-01)
fault.
Defective FLASH memory module.
Check the connection of the FLASH memory module.
A0152:
High Internal Air
Temperature
This alarm indicates that the internal
air temperature is too high.
Note:
It can be disabled by setting
P0353 = 1 or 3.
High surrounding air temperature (>50 °C (122 °F)) and
high output current.
Defective internal fan (if existent).
High temperature (> 45 ºC) inside the cabinet.
