71
│
F.4. SERVICING & MAINTENANCE OF HYDRAULIC COMPONENTS
BOILER AND HEATING CIRCUIT PUMPS
The operating status and possible pump faults are displayed by LED indication directly on the
pump.
LED indication State description and possible fault reasons
green is lit
– pump is running in trouble-free operation
red is lit
– rotor is blocked
– electric motor winding defect
flashing red
– power supply lower/higher than permitted
– electric short circuit in pump
– pump overheated
flashing red and green
– unforced fluid circulation through the pump
– pump speed lower than desired
– air in pump
BALL VALVES
The ball valves are equipped with a control shaft with two
O-rings with dimensions of 8.7 x 1.8 mm. These rings can
be easily replaced by closing the tap, removing the control
element with stop ends and loosening the packing nut with
a # 21 wrench without the need to drain the system.
Replaceable
O-rings