Nidec LEROY-SOMER VARMECA 30 Installation Und Wartung Seite 54

5 - FAULTS - DIAGNOSTICS
Information relating to the status of the VARMECA 30 is provided by two indicator lamps located on the local control options (B 31/32
or B 33/34, BMA 31/32 or BMA 33/34, BMAVAR 31/32 or BMAVAR 33/34, CVI VMA 31/32 or CVI VMA 33/34 options), or by the internal
LED in VMA 31/32.
Colour and state of indic. lamp
Steady green
Flashing green
Flashing red
Steady red
The fault is cleared by switching off the VARMECA 30 or by opening/closing the connection between terminals 12: ENA and 11: +24 V
(VMA 31/32) or SDI1 and SDI2 (VMA 33/34).
When a no-load test is carried out (i.e. with the motor disconnected), motor operation may appear unstable. This instability manifests
itself in the form of vibration and, in extreme cases, in a fault (overload, overcurrent or braking resistor overload). However, the
instability disappears as soon as the motor is loaded. To remove this instability during a no-load test, set parameter 5.13 to DYNAMIC.
To return to normal machine operating conditions, reset parameter 5.13 to FIXED.
If the problem persists, contact Leroy-Somer.
6 - MAINTENANCE
• All work relating to installation, commissioning
and maintenance
experienced, qualified personnel.
• Before carrying out any work, disconnect and lock the
VARMECA 30 power supply circuit and wait 2 minutes for
the capacitors to discharge.
6.1 - Care
No special care is required on the VARMECA 30, apart from the
regular removal of dust from the fan grille and the cooling fins
located at the bottom of the casing.
Do not dismantle the VARMECA 30 while it is still under
guarantee, as this would then immediately become null and
void.
CAUTION: Certain components which are sensitive to
electrostatic discharge may be destroyed simply by touching
them. Do not leave any metal object in the connection area, as
this could cause a short-circuit.
6.2 - Measurements
6.2.1 - General
The input voltages can be measured using ordinary
instruments.
24
FAULTS - DIAGNOSTICS
VARMECA status
No trip
Mains present
Current limiting
IGBT temperature alarm
Motor overload
Braking resistor option overload
• Short-circuit of a motor winding
• Locked motor rotor
• Faulty insulation of a winding
• I t overheating
2
• Internal fault
• Undervoltage
• Overvoltage
must be carried out
The motor current IS NOT MEASURED ON THE VARMECA
30 POWER SUPPLY (L1, L2, L3).
It is measured using an ordinary clamp ammeter on one of the
by
wires which goes into the motor terminal block.
6.2.2 - Procedure for measuring the motor current on
VMA 31/32 (if the motor wire loop is
inaccessible)
- Open the VARMECA 30 power supply circuit and lock it.
- Wait 2 minutes for the capacitors to discharge (for the single-
phase range).
- Open the cover of the VARMECA 30.
- Open the connection between terminals SDI1 and SDI2 (VMA
33/34) or 11 and 12 (VMA 31/32).
- Remove the TORX + slot type screws from the protection
plate above the motor terminals.
- Pass the longest motor wire along the side of the protection
circuit.
- Replace the protection plate and fasten it.
- Pass the clamp ammeter through the motor wire loop.
- Remake the connection between terminals SDI1 and SDI2
(VMA 33/34) or 11 and 12 (VMA 31/32).
- Refit the cover to ensure the assembly is IP20
- Return to point 5 in Note 1.
Installation and maintenance - VARMECA 30
Checks to be performed
• Check that the motor is not overloaded
or stalled
• Check that air is able to circulate
around the motor fins and VARMECA
casing
• The motor is overloaded: check the
motor current using a clamp ammeter
• Check that the deceleration ramp is
long enough for applications with high
inertia
• Check that no incident has occurred
• Switch off and then on again to clear
the fault.
• Check the mains voltage
• Check that the deceleration ramp is
long enough for applications with high
inertia
• If the fault remains, consult LEROY-
SOMER
3776 en - 2017.10 / n