VEVOR RBM50 Mode D'emploi page 9

contactor(KM1 or KM2) turns of rotation to the left. The motor runs as long as one
of the pedals is pushed. Machine is equipped with TA stop button, which can be
used for emergency situation or when repairs, adjustments etc. take place. After
theTA2 stop button was pushed, it is necessary to pull it out when you want to
restart the machine, because it is as retaining button and stays pushed.
E. Maintenance and repair of electric installation
1.Trouble and remedies:
1)In case all those indicated at the previous chapters were respected and machine
does not start when pressing one of the pedals and KM contactor (KM1 or KM2)
does not connect, make the following operations:
a. Check if machine is correctly supplied
b. Check if thermal protection of M motor (FR thermal relay) was activated and
look for the.
cause which determined it.
Reasons could be:
supply of M electric motor is made only in two phases or with lower voltage
than360V/50Hz
thermal repay is not correctly set- at 2.3A.
M electric is locked or turns hardly owing to frictions
M electric motor out of order
-FR thermal relay out of order
Make corrections and reset the thermal relay with the help of resetting lever.
c. Check the breaker: QF2 in transformer primary circuit and QF3 in the control
circuit. In case one of the breaker is broken, remove the fault and change the
replacing piece.
Attention: Use only calibrated replacing pieces and at the parameters indicated.
d. Check if the TC transformer for 24V supply voltage of control circuit is in order:
-check if T transformer is fed correctly in primary with a 400V voltage-check if in
secondary the transformer supplies the 24V voltage
e. Check if the control circuit has continuity:
-screws for connections to be well tighten.
-contacts of instruments (JK1,JK2,SB,FR) in the control circuit to close correctly.
f. Check if KM contactor is in order.
- 8 -