Table 41 Liebert Icom ® Medium Control Board Dipswitch Settings - Emerson Liebert CRV User Manual

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