actually I believe the OPs issue probably is high humidity, he refers to a data center with very low power consumption (or perhaps a humidifier with very low power consumption?)
It is a common case for data centers be be designed, constructed and tested for very large loads, the building is then handed over and the IT guys take months if not years to load it up. During this time the load on the cooling systems can be so low that compressors are not bought on to provide cooling frequently, this can let humidity drift upwards.
There is no one size fits all solution as all systems are a different configuration with different components. These are the general remedies however:
[ol 1]
[li]control humidity sources[/li]
[li]false load system in order to engage cooling/dehumidification [/li]
[/ol]
Obviously option 1 is preferable as option 2 is wasteful from an energy perspective. Typically the humidity source is outdoor air, the humidity can be lowered by decreasing the outdoor air volume delivered, or lowering the temperature of the outdoor air supply to strip out humidity.