Problem
Possible Cause
Corrective Action
Water on the floor around the unit
Unit is not properly leveled
Adjust the leveling feet
Unit condensate drain pipe is
clogged
Remove pipe obstruction
Leak in the water circuit
Locate and repair the leak
Piping insulation broken/damaged
Restore insulation integrity
Leak in the draining circuit
Contact your local Vertiv™ representative
Condensate pump is faulty
Contact your local Vertiv™ representative
Leak in the humidifier filling hose
Contact your local Vertiv™ representative
Unsteady air delivery temperature
Incorrect positioning of remote
temperature sensors
Verify correct positioning of temperature sensors
Unbalanced heat load distribution
Redistribute rack heat load
Remote temperature sensor issue
Contact your local Vertiv™ representative
Faulty temperature sensor
Contact your local Vertiv™ representative
Unit controller issue
Contact your local Vertiv™ representative
Local display is not operational but
unit operates
Local display cable disconnected
Connect cable
Local display cable damaged
Replace cable
Local display configuration lost
Contact your local Vertiv™ representative
Local display is not operational and
unit does not operate
Unit electrical supply is Off
Restore electrical supply
Unit main circuit breaker is Off
Switch on the unit
Control board supply issue
Contact your local Vertiv™ representative
Control board issue
Contact your local Vertiv™ representative
Contractor is engaged and there is no
heating effect
MCB of the heater is disconnected
Check that voltage of the contractor is within normal range
Heater is damaged
Replace the heater
Table 9.1 Troubleshooting (continued)
9 Maintenance
66
Vertiv™ Liebert® CRV CRC30 and CRC60 Chilled Water Cooling System User Manual