Alarm
Possible cause
Remedy
Priority level
Reset
Phase imbalance,
pump current
There is a current
imbalance in the
phase leads of the
pump.
Check the wiring
and the
connections to the
terminals.
Class A
Automatic
Phase imbalance,
voltage
There is a voltage
imbalance in the
connections to the
controller.
–
Class A
Manual
Pump
communication
failure
There is no
communication
between the
controller and the
pump.
Check the wiring
and the
connections to the
terminals.
Class B
Automatic
Pump leakage
There is a leakage
in the pump.
Examine and repair
the leakage.
Class A
Automatic
Pump short circuit There is a short
circuit in the signals
from the FLS
sensor.
–
Class A
Automatic
Pump thermal
alarm
The thermal
sensors detect that
the temperature is
higher than the
permitted limit.
Check the pump
temperature.
Class A
Automatic
Pump thermal
warning
The thermal
sensors detect that
the temperature is
high.
Check the pump
temperature.
Class B
Automatic
Service alarm
The pump is due
for service.
–
Class B
Manual
For more
information, see
on page 25.
Startup failure
The controller
cannot start
correctly.
Upgrade the
software of the
controller.
Class A
Manual
Undercurrent
The pump does not
receive sufficient
voltage.
• Check the
incoming power
supply.
• Check the wiring
and the
connections to
the terminals.
Class A
Automatic
Undervoltage
The pump does not
receive sufficient
voltage.
• Check the
incoming power
supply.
• Check the wiring
and the
connections to
the terminals.
Class A
Automatic
3 Function Description
16
DCM 711 Installation, Operation, and Maintenance Manual
