Grundfos SMART Digital XL - DDE 120-7, Инструкция по установке и эксплуатации

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English (GB)
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9.2 Indicated faults for DDE-AR
●
= LED on
❍
= LED flashing
empty table cell = LED off
* For some alarms the pump tries to restart periodically.
LED status
Pump
status
Fault Possible cause Possible remedy
❍
● Running
Low-level in
tank
(Warning) • Dosing medium tank
almost empty
• Fill tank.
• Check contact setting
(
NO
/
NC
).
●
❍
Standby
Tank empty
(Alarm) • Dosing medium tank
empty
● ❍ Standby
External stop
activated
(Status
message)
• External stop signal is
activated
• Deactivate external
stop signal to start the
pump again.
• Check contact setting
(
NO
/
NC
).
❍ Standby*
Motor blocked
(Alarm)
• Backpressure greater than
nominal pressure
• Reduce backpressure.
Observe section
4.1 Technical data .
• Incorrectly installed
diaphragm
• Install the diaphragm
correctly.
• Damage to gears
• Hall sensor failure
• Motor failure • Contact your Grundfos
service partner.
• Leaky/dirty outlet valve.
Dosing medium flows back
from the outlet line into the
dosing head and moves
the motor.
• Inlet pressure too high.
Dosing medium flows from
the inlet side into the
dosing head and moves
the motor.
• Replace valve if
necessary. See section
8.3 Perform service .
• Install screen in inlet
line.
• Reduce inlet pressure.
Observe section
4.1 Technical data .
Motor
overheated
(Alarm)
• Ambient temperature to
high
• Reduce ambient
temperature.
• Stop pump until motor
cools down.
Cavitation
(Alarm)
• Blocked / constricted /
squeezed inlet line
• Blocked/constricted inlet
valve
• Suction lift too high
• Viscosity too high
• Cavitation moves the
motor
• Reduce suction lift.
• Increase inlet line
diameter.
• Check inlet line and
open isolating valve if
necessary.