Stulz CyberCool - Page 51

51
cybercool indoor chiller original instructions
© STULZ GmbH – all rights reserved EN/09.2017/G44
Alarm message Cause for alarm Cause Elimination
EEV #: Stepper
motor error
Thecontrolmodulehasdetect-
ed a malfunction of the stepper
motor.
1.Cablebreakageorfaultycontact Checkcableandcontacts.
2.Steppermotordefective. Replace expansion valve.
eev# reliability
alarm (Carel EVD)
TheC7000controllercannot
reach the valve by the Modbus
connection.
Bus connection to the valve faulty. Checkbusconnection.
Pump # failure Pumppowerinterruptor(evtl.
also the internal pump fault
detection) has triggered.
Currenttoohigh.
Shortcircuitinthecable.
Pumpmotordefective.
Checkpumpmotoronvoltageconti-
nuityandcurrentconsumption.Check
cable.
watertemp. inlet #
too high
Theadjustedlimitvaluehas
been exceeded.
1.Setpointadjustedtoohigh. Checksetpointsetting.
2.Thermalloadbyconsumeristoo
high (with flow water control).
Checkcontrolmode.
watertemp. inlet #
too low
Theactualvalueisbelowthe
adjustedlimitvalue.
1.Setpointadjustedtoolow. Checksetpointsetting.
2.Thermalloadbyconsumeristoo
low (with flow water control).
Checkcontrolmode.
watertemp. outlet #
too high
Theadjustedlimitvaluehas
been exceeded.
1.Setpointadjustedtoohigh. Checksetpointsetting.
2.Evaporatorsoiledonwaterside.
(eventually in combination with
return water control)
Checkheattransmissionattheevap-
orator by checking the temperature
difference between flow water temp.
and evaporation temperature.
3.Condensercoilsoiledonair
side. Air inlet temperature too high.
(eventually in combination with
return water control)
Checkheattransmissionatthe
condenser by checking the temper-
ature difference between outdoor
air temperature and condensation
temperature.
watertemp. outlet #
too low
Theactualvalueisbelowthe
adjustedlimitvalue.
Setpointadjustedtoolow. Checksetpointsetting.
Phase error Phasemonitoringdevicehas
detected an error.
Phasefailure. Checkthevoltagesupply.
Water flow alarm Thewaterowislessthanthe
limit value set in the flow switch
for minimum flow.
1. All pumps have failed. Checkpumpoperation.
2.Leakageinthewatercircuit. Checkhydrauliccircuitontightness.
3.Airinthewatercircuit. Purgethecircuitbytheventvalves.
Buserror Theunitnolongerparticipates
in the bus communication.
Thebuswiringisdefectiveorincor-
rectly connected.
Checkthebuswiring.
Addressconflict A bus address has been
assigned twice.
- Oneofthetwoidenticalbusaddresses
must be changed.
External alarm in #
failure
No voltage is present at the
digital input for the external
alarm #.
1. An external device has triggered
a signal.
Dependingonthetypeofmessage.
2.Cablebreakageorfaultycontact. Checkwiring.
# stands for a number in case of several components of the same kind.