91 © STULZ GmbH – all rights reserved EN/09.2019/G41
cybercool 2 screw original insTrUcTions
Alarm message Cause for alarm Cause Elimination
EEV #: Stepper
motor error
-
ed a malfunction of the stepper
motor.
Replace expansion valve.
eev# reliability
alarm (Carel EVD)
reach the valve by the Modbus
connection.
Bus connection to the valve faulty.
Pump # failure
also the internal pump fault
Pump motor defective.
-
cable.
watertemp. inlet #
too high
been exceeded.
watertemp. inlet #
too low
adjusted limit value.
watertemp. outlet #
too high
been exceeded.
-
orator by checking the temperature
difference between flow water temp.
and evaporation temperature.
side. Air inlet temperature too high.
condenser by checking the temper-
ature difference between outdoor
air temperature and condensation
temperature.
watertemp. outlet #
too low
adjusted limit value.
Phase error Phase monitoring device has
detected an error.
Phase failure.
Water flow alarm
limit value set in the flow switch
for minimum flow.
3. Air in the water circuit. Purge the circuit by the vent valves.
Buserror
in the bus communication.
-
rectly connected.
Addressconflict A bus address has been
assigned twice.
-
must be changed.
External alarm in #
failure
No voltage is present at the
digital input for the external
alarm #.
a signal.
# stands for a number in case of several components of the same kind.
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