Xylem IM255 AQUAVAR Intelligent Pump Controller - Manual (Page 47)

Freeze output The remote reference is active, which holds the present
speed.
• Freeze output was selected as a function for a digital
input (parameter group 5–1* Digital Inputs). The
corresponding terminal is active. Speed control is
only possible via the terminal functions Speed Up
and Speed Down.
• Hold ramp is activated via serial communication.
Freeze output request A freeze output command has been given, but the motor
will remain stopped until a run permissive signal is
received.
Freeze Reference Freeze Reference was chosen as a function for a digital
input (parameter group 5–1* Digital Inputs). This
corresponding terminal is active. The controller saves the
actual reference. Changing the reference is now only
possible via terminal functions Speed Up and Speed
Down.
Jog request A jog command has been given, but the motor will be
stopped until a run permissive signal is received via a
digital input.
Jogging The motor is running as programmed in 3–19 Jog Speed
[RPM].
• Jog was selected as function for a digital input
(parameter group 5–1* Digital Inputs). The
corresponding terminal (e.g. Terminal 29) is active.
• The Jog Function is activated via the serial
communication.
• The Jog function was selected as a reaction for a
monitoring function (e.g. No signal). The
monitoring function is active.
Motor check In 1–80 Function at Stop, Motor Check was selected. A
stop command is active. To ensure that a motor is
connected to the controller, a permanent test current is
applied to the motor.
OVC control Overvoltage control was activated in 2–17 Overvoltage
Control, [2] Enabled. The connected motor is supplying
the controller with generative energy. The overvoltage
control adjusts the V/Hz ratio to run the motor in
controlled mode and to prevent the controller from
tripping.
PowerUnit Off (For controllers with an external 24 V power supply
installed only.) Mains supply to the controller is removed,
but the control card is supplied by the external 24 V.
Protection md Protection mode is active. The unit has detected a critical
status (an overcurrent or overvoltage).
• To avoid tripping, switching frequency is reduced to
4 kHz.
• If possible, protection mode ends after
approximately 10 s
• Protection mode can be restricted in 14–26 Trip
Delay at Inverter Fault
Electrical Installation
Aquavar ® Intelligent Pump Controller INSTRUCTION MANUAL 45