Troubleshooting
Liebert
®
CRV
™
174
Water drops carried
by airflow
Room humidity is over acceptable limit Check room condition
Condensate pan drain is clogged Contact your local Emerson representative
Problem with humidifier control Contact your local Emerson representative
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
Chilled water and water/glycol units: 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 Emerson representative
Condensate pump is faulty Contact your local Emerson representative
Leak in the humidifier filling hose Contact your local Emerson representative
Unsteady air
delivery
temperature
Incorrect positioning of remote
temperature sensor(s)
Verify correct positioning of temperature sensors
Unbalanced heat load distribution Redistribute rack heat load
Remote temperature sensor(s) issue Contact your local Emerson representative
Faulty temperature sensor(s) Contact your local Emerson representative
Unit controller issue Contact your local Emerson 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 Emerson representative
Local display is not
operational and unit
does not operate
Unit electrical supply is Off Restore electrical supply
Unit main switch is Off Switch On the unit
Control board supply issue Contact your local Emerson representative
Control board issue Contact your local Emerson representative
Table 41 Liebert iCOM
®
medium control board DIPswitch settings
DIPswitch
Number
Compressorized
CRV Models
CR019, CR020
and CR035
Chilled Water
Model-CR040
1On Off
2Off Off
3On Off
4Off Off
5Off Off
6Off Off
7Off On
8On On
Table 40 Unit diagnostics
Problem Possible Cause Corrective Action
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