Grundfos Multilift MD Serie Instrucciones De Instalación Y Funcionamiento página 17

6.4 Description of fault indications
If a fault occurs, the symbol
the 14-segment characters in the display. To see the kind of fault, if it is automatically reset and the code is not longer visible, open the
fault log (see fig. 13). When you leave the fault log, the symbol
The last 20 faults are stored in the fault log as fault codes. The meaning of the fault codes are described in the table below:
Fault
Meaning
code
Phase sequence
F001
failure
One phase
F002
missing
F003 High liquid level
F004 Sensor failure
Overtemperature,
F005
pump 1
Overtemperature,
F006
pump 2
Overcurrent,
F007
pump 1
Overcurrent,
F008
pump 2
Operating time
F011 exceeded, pump
1
Operating time
F012 exceeded, pump
2
F013 External fault
F014 Battery failure
Relay or
F015 contactor does
not open, pump 1
Relay or
F016 contactor does
not close, pump 1
Relay or
F017 contactor does
not open, pump 2
Relay or
F018 contactor does
not close, pump 2
F019
Display
communication
failure
F117
High level alarm
F020
in tank
will be visible, an audible alarm will be given by the buzzer and the fault code will be written by means of
Reset of
fault
Displayed Flashing
indications Description
text symbols
Auto Man
F001
F002 ●
F003 ●
SENSOR - ●
TEMP ●
TEMP ●
F007
F008
F011 ●
F012 ●
EXT -
BAT - ●
RELAY
RELAY
RELAY
RELAY
Display is
off.
F117
F020
will disappear.
(Only three-phase pumps)
● The phase sequence between control board and power supply is
wrong. See fig. 14.
(Only three-phase pumps)
●
One phase is missing.
● The liquid level is high in relation to preset value.
● Sensor signal out of range or lost.
Motor thermal switches connected to the controller will stop pump 1
●
in case of overheating.
Motor thermal switches connected to the controller will stop pump 2
●
in case of overheating.
Pump 1 is stopped if an overcurrent is measured for a certain period
●
of time (blockage protection).
Pump 2 is stopped if an overcurrent is measured for a certain period
●
of time (blockage protection).
The pump has run for more than the allowed operating time and the
● controller has stopped the pump for a defined cool-down period in
order to prevent overheating. The operating time and cool down
period depends on the pump. See duty type on nameplate.
Check that the outlet isolating valve is open.
Check that the non-return valve is functioning. A leaky non-return
●
valve can allow liquid in the outlet pipe to flow back in to the
collecting tank.
Remove any blockage from the venting system, see fig. 33.
An external level switch can be connected to the controller to give
● an alarm when basement outside the lifting station is flooded by
groundwater or water from burst water pipe.
● The battery is empty and must be replaced.
Pump 1 receives a signal to stop, but does not react. This situation
●
is detected by current measurement.
Pump 1 receives a signal to start, but does not react. This situation
is detected by current measurement.
Pump 2 receives a signal to stop, but does not react. This situation
●
is detected by current measurement.
Pump 2 receives a signal to start, but does not react. This situation
is detected by current measurement.
Communication failure between the main board and the display. As
the display is off, the fault code can be found via PC tool only.
●
Check the patch cable RJ45 between the main board and the
display.
Communication failure between the main board and the display.
● The display is still on and is displaying the fault code F117. Check
the patch cable RJ45 between the main board and the display.
Alarm triggered by the additional float switch inside the tank. The
piezoresistive sensor has failed to detect the start level. The float
switch is triggered and starts a pump for 20 seconds (preset value,
changeable via PC tool).
● Check the tank, the level sensor hose and the hose connections for
any air leakage.
The level sensor hose is connected correctly to the pneumatic
coupling underneath the controller when you cannot pull it out
without pressing the locking mechanism.
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