49
Frequency inverters
FMV 2107
FMV 2307
5 - FAULTS - DIAGNOSTICS
• Information about the inverter status is provided by the
display.
• Faults are shown in mnemonic form flashing on the
display.
The last ten faults are stored in the memory (even after a
mains power break) in parameter PA.
• Information about the inverter status is also provided by
the display.
• Some inverter states are provided by the logic outputs
(relays and open collector transistors).
5.1 - Display indication - error messages
*
1:
ASIC error,
2 :
EEPROM does not respond,
3 :
EEPROM fault,
4 :
processor error,
5 :
operator panel fault,
6 : EEPROM initialisation fault,
7 : +15V power supply imbalance,
8 : -15V power supply imbalance,
9 : PWM circuit initialisation fault,
10 : stack overflow.
(1) " cL " protection is not active if b11 = 0.20 (0 to 20 mA) or if b26 = 1.
Note : All trips can be cleared using reset, except " Err " which requires the power to be turned off and then back on. Thermal
devices should not be triggered and reset several times in succession.
Display
mnemonic
Reason for trip
Check points
Solution
UU
D.C. bus
undervoltage
• Terminals L, N (FMV 2107)
Terminals L1, L2, L3 (FMV 2307) :
prolonged undervoltage on the mains
supply.
• Check the power supply.
• Check the power components.
OU
D.C. bus
overvoltage
• Rapid deceleration (inertial load).
• Terminals L, N (FMV 2107)
Terminals L1, L2, L3 (FMV 2307) :
Overvoltage on the mains supply.
• Program a greater deceleration time period at P3.
• Check the stop mode set via b2 and b7.
• Use a braking resistance (optional).
• Check the mains supply.
OI
Inverter output
short-circuit
• Power terminal blocks.
• Wiring.
• Eliminate the cause of the fault.
It
I x t overload fault
• Motor load.
• Adjustment of I x t threshold (parameters
P4, P5).
• Check that the motor is not overloaded.
• Check that the I x t protection is correctly set.
Et
Forced external trip
Terminal C7.
• Check that terminal C7 is conneced to 0V via the
external wiring (in negative logic).
• Check b5.
cL
Loss of current signal
speed reference
Level of current setpoint 4 - 20 mA or
20 - 4 mA. (1)
Check that the input reference level is > 3mA.
Disable the trip via b26 = 1.
PS
Supply fault on
switching
Ter10V and +24V.
Switch the inverter off and then on again. If the fault persists,
consult LEROY-SOMER
th
Triggering of motor
probe
• Motor temperature too high :
PTC resistance > 3 k
Ω
or open PTO.
• Check the motor load.
• Reduce the authorised overload level.
• Check the motor ventilation and the ambient temperature.
• Check the probe wiring between C6 and C7.
Oh
Cooling unit
overheated
• Cooling fans (for those which are
equipped with them).
• Ambient temperature.
• Check that :
- the fans are turning,
- the cooling holes are not obstructed,
- the ambient temperature is lower than 50
°
C,
- there is sufficient space around the inverter.
EE
NOV RAM error
• All parameters = factory setting.
Please consult LEROY-SOMER.
Err
*
Hardware trip when
unit switched on
Control card, operator panel
Reset is not active.
Switch the inverter off and then on again. If the fault persists,
consult LEROY-SOMER.
