8.5 Teamwork Control
Press the menu button and choose Parameter Settings > Teamwork Settings to set teamwork control. Teamwork Mode
includes Teamwork 0, Teamwork 1, Teamwork 2, and Teamwork 3. Teamwork 0 indicates standby and rotation control.
Teamwork 1 indicates standby, rotation, and cooling/heating cascade control. Teamwork 2 indicates standby, rotation, and
avoid fighting control. Teamwork 3 indicates standby, rotation, and fan cascade control.
Standby function
One or several units can be defined as standby unit. The standby unit fan runs at the speed of 0% by default. If the Back
Draft Control (BDR) mode is enabled, the standby unit fan will run at 20%. If a critical alarm or normal alarm is generated on
the master unit, a standby unit will start to run.
•
Critical alarms: fan failure alarm (when the alarm handling is set to shut down), water leakage alarm (when the
alarm handling is set to shut down).
•
Normal alarms:
•
Airflow loss alarm, high supply temperature alarm, high return temperature alarm, and high remote
temperature alarm.
•
Supply temp sensor 1 failure alarm, supply temp sensor 2 failure alarm, and supply temp sensor 3 failure
alarm. The standby unit will start to run if all the three alarms are generated on the primary unit when the
water valve and fans are controlled according to supply air temperature.
•
Return temp sensor 1 failure alarm, return temp sensor 2 failure alarm, and return temp sensor 3 failure
alarm. The standby unit will start to run if all the three alarms are generated on the primary unit when the
water valve and fans are controlled according to return air temperature.
•
Remote temp sensor 1 failure alarm, remote temp sensor 2 failure alarm, ..., remote temp sensor 10 failure
alarm. The standby unit will start to run if all the ten alarms are generated on the primary unit when the
water valve and fans are controlled according to remote temperature.
Rotation function
This function ensures that all the units have equal run time.
Avoid fighting function
This function prevents the units from performing conflicting operations, such as cooling and heating, humidifying and
dehumidifying. The primary unit will calculate the number of cooling units and heating units (or humidifying units and
dehumidifying units). If cooling units (or humidifying units) are more than heating units (or dehumidifying units), the heating
units (or humidifying units) will stop working.
Cascade function
If an alarm is generated on the primary unit or the running units cannot keep the specified temperature, a standby unit will
start to run.
8 HMI Display
55
Vertiv™ Liebert® CRV CRC30 and CRC60 Chilled Water Cooling System User Manual
