Troubleshooting - ARAG 853 Serie Instalación Uso Y Mantenimiento

GB
7 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.
WARNING: Fitting back the valve without replacing the gasket kit can reduce the
sealing 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 what 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.
8

TROUBLESHOOTING

8.1 LED blinks
TROUBLE
The valve leaks or the seal
of the ball is not enough
LED NUMBER
STATUS OF BLINKS
- -
CAUSE
Presence of foreign
bodies.
Worn seals.
16
SOLUTION
• Make sure there are no
foreign bodies; if so, remove
them.
• Replace the seals.