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 a default speed of 20%. If a critical alarm or
normal alarm is generated on the master unit, a standby unit will start to run.
•
Critical fault alarms: high pressure lock, low pressure lock, high discharge temperature lock, low discharge
superheat lock, low pressure sensor fail lock, compressor drive fail lock, fan fail alarm (when its alarm handling
is set to shut down), water underfloor alarm (when its alarm handling is set to shut down), power fail alarm.
•
Normal alarms: high discharge temperature alarm, air flow temperature sensor failure, air flow loss alarm,
discharge temperature sensor failure, suction temperature sensor failure, low pressure sensor failure, EEV drive
communication failure, compressor drive communication failure, compressor temperature control sensors
failure, fan temperature control sensors failure, high supply temperature alarm, high return temperature alarm,
and high remote temperature alarm.
Rotation function
This function ensures that all the units have equal runtime.
Avoid fighting function
This function prevents the units from performing conflicting operations, such as cooling and heating, humidifying and
dehumidifying. The master 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 master unit, a standby unit will start to run.
8 HMI Display
59
Vertiv™ Liebert® CRV CRD25 and CRD35 Row-Based Cooling System User Manual
