ARAG Electric ball valve with CAN-BUS connection - Manual (Page 12)

12
GB
6 MAINTENANCE
The electric ball valves of the 853 CAN-BUS series do not require any particular maintenance.
Internal cleaning can be carried out when the system to which the valve is connected is cleaned.
If the maintenance man needs to open the valve to check the seal or for extraordinary cleaning,
before fitting it back you must replace the seal kit of the orifice that was opened.
CAUTION: Fitting back the valve without replacing the seal kit can reduce the seal on
the internal ball and therefore cause leaks.
- Unscrew the bolts related to the orifice to be opened, then remove it and take out the inner gaskets
and the O-ring inserted in the internal seat of the flange that has been removed.
- Re-position all the gaskets in their seats, as shown in Fig. VIII (gasket (
1) is not present on all
models), then close the flange.
- Insert the bolts in the holes, fit back the washers and screw in the nuts by hand.
- To ensure correct operation, the nuts (
2) must be tightened using a dynamometric spanner calibrated
according to that which is indicated in Tab. 1.
- Reconnect all the hydraulic connections.
- Restore electric power supply.
- Put the system under pressure ONLY WITH CLEAN WATER and check that the connections are
not leaking.
Further information on the special maintenance operations can be downloaded free of charge
from our website www.aragnet.com.
7 TROUBLESHOOTING
FAULT CAUSE REMEDY
The valve leaks or the seal
of the ball is not enough Presence of foreign bodies
• Make sure there are no foreign bodies;
if so, remove them.
Worn seals • Replace the seals.
The valve does not work
Lack of power
• Check the connections and the cables.
Replace the cable. If the problem
persists, contact your nearest Service
Centre.
The harnesses are not connected correctly • Check the connections and the cables.
Power supply voltage is lower than the
minimum value
• Make sure that the harnesses are
suitable for the system
Geared motor broken • Replace the geared motor.
The valve does not stop at
the preset point
The valve has not been controlled correctly
by the SYNCRO computer
• Check that the function set in the
SYNCRO computer is consistent with
the activated valve.
Faulty encoder • Replace the geared motor.
The valve does not respond
to commands The valve has not been acknowledged
correctly by the SYNCRO computer
• Check the connections.
8 DISPOSAL
Dispose of the system in compliance with the established legislation in the country of use.