TECO F33 Series, Инструкция по эксплуатации, Страница: 156 / 192

Troubleshooting, Diagnoses and Maintenance 153
Table 31 Trip condition, their possible causes and remedial action
Trip condition Possible Cause Remedy
Motor I
2
t
“I
2
t”
I
2
t value is exceeded.
- Overload on the motor according to the
programmed I
2
t settings.
- Check on mechanical overload on the
motor
or the machinery (bearings,
gearboxes, chains, belts, etc.)
- Change the Motor I
2
t Current setting
PTC
Motor thermistor (PTC) exceeds maximum
level.
NOTE: Only valid if option board PTC/PT100
is used.
- Check on mechanical overload on the
motor or the machinery (bearings,
gearboxes, chains, belts, etc.)
- Check the motor cooling system.
- Self-cooled motor at low speed, too high
load.
- Set PTC, menu [234] to OFF
Motor PTC
Motor thermistor (PTC) exceeds maximum
level.
NOTE: Only valid if [237] is enabled.
- Check on mechanical overload on the
motor or the machinery (bearings,
gearboxes, chains, belts, etc.)
- Check the motor cooling system.
- Self-cooled motor at low speed, too high
load.
- Set PTC, menu [237] to OFF
Motor lost
Phase loss or too great imbalance on the
motor phases
- Check the motor voltage on all phases.
- Check for loose or poor motor cable
connections
- If all connections are OK, contact your
supplier
- Set motor lost alarm to OFF.
Locked rotor
Torque limit at motor standstill:
-
Mechanical blocking of the rotor.
- Check for mechanical problems at the
motor or the machinery connected to the
motor
- Set locked rotor alarm to OFF.
Ext trip
External input (DigIn 1-8) active:
- active low function on the input.
- Check the equipment that initiates the
external input
- Check the programming of the digital
inputs DigIn 1-8
Ext Mot Temp
External input (DigIn 1-8) active:
- active low function on the input.
- Check the equipment that initiates the
external input
- Check the programming of the digital
inputs DigIn 1-8
Mon MaxAlarm
Max alarm level (overload) has been
reached. - Check the load condition of the machine
- Check the monitor setting in section 11.6, page 132.
Mon MinAlarm
Min alarm level (underload) has been
reached. - Check the load condition of the machine
- Check the monitor setting in section 11.6, page 132.
Comm error Error on serial communication (option)
- Check cables and connection of the
serial communication.
- Check all settings with regard to the
serial communication
- Restart the equipment including the
VSD
PT100
Motor PT100 elements exceeds maximum
level.
NOTE: Only valid if option board PTC/PT100
is used.
- Check on mechanical overload on the
motor
or the machinery (bearings,
gearboxes, chains, belts, etc.)
- Check the motor cooling system.
- Self-cooled motor at low speed, too high
load.
- Set PT100 to OFF