Burkert Type 2731 - Manual (Page 21)

10 MalfuncTiOns
malfunction cause /remedial action
Actuator does
not switch Pilot air port interchanged 4)
CFA: Connecting lower pilot air port
CFB: Connecting upper pilot air port
Pilot pressure too low
See pressure specifications on the type label.
Medium pressure too high
See pressure specifications on the type label.
Valve is not
sealed Medium pressure too high
See pressure specifications on the type label.
Pilot pressure too low
See pressure specifications on the type label.
Flow rate
reduced PTFE diaphragm bulging
→
Replace diaphragm.
Tab. 9: Malfunctions
4)
see “Fig. 15: Pneumatic connection”
11 MainTenance, cleaning
11.1 safety instructions
DaNger!
danger – high pressure in the equipment!
▶ Before loosening the lines and valves, turn off the pressure and
vent the lines.
risk of injury due to electrical shock!
▶ Before reaching into the system, switch off the power supply
and secure to prevent reactivation!
▶ Observe applicable accident prevention and safety regulations
for electrical equipment!
WarNiNg!
risk of injury from improper maintenance!
▶ Installation may be carried out by authorized technicians only
and with the appropriate tools!
risk of injury from unintentional activation of the system and
an uncontrolled restart!
▶ Secure system from unintentional activation.
▶ Following maintenance, ensure a controlled restart.
21
Malfunctions
english
Type 2730 / 2731 DN 65-100