APC Condenser 2 EC Fan ACCD75208 User Manual

The microprocessor controller shall 
activate a visible and audible alarm 
in the following occurrences:

•  Cool Fail
•  Rack inlet temperature violation
•  Rack inlet temperature sensor fault
•  Air filter clogged
•  Air filter run hours exceeded
•  Filter DP sensor failure
•  Supply air sensor fault
•  Return air sensor fault
•  Supply air high temperature 

violation

•  Return air high temperature 

violation

•  Fan fault
•  Fan run hours exceeded
•  Water detection fault
•  Condensate pump fault
•  Condensate run hours exceeded
•  Humidifier water conductivity high 

violation

•  Humidifier fault tolerance exceeded
•  Humidifier low water
•  Humidifier excessive output 

reduction

•  Humidifier drain fault
•  Humidifier cylinder full
•  Humidifier replace cylinder
•  Humidifier RS485 communication 

fault

•  Humidifier run hours violation
•  Humidity high/low violation
•  Supply humidity sensor fault
•  Return humidity sensor fault
•  Heater fault
•  Heater run hours exceeded
•  Heater interlock shutdown
•  Group communication fault
•  Internal communication fault
•  A-link isolation relay fault
•  External communication fault
•  Input contact fault
•  Invalid supply setpoint
•  Idle mode active

•  Coil fluid valve actuator fault
•  Fluid flow fault
•  Entering fluid temperature high 

violation

•  Entering fluid temperature sensor 

fault

•  Leaving fluid temperature sensor 

fault

•  Power source failure
•  Fluid calibration

•  High discharge pressure
•  Low suction pressure
•  High suction pressure
•  Compressor drive failure
•  Compressor drive warning
•  Compressor run hours violation
•  Compressor drive RS485 

communication fault

•  Excessive compressor cycling
•  Air flow decreased while 

compressor off

•  Suction pressure sensor failure
•  Discharge pressure sensor failure
•  High pressure switch active
•  Fan speed decreased to avoid high 

pressure (event only)

•  Compressor speed decreased to 

avoid high pressure (event only)

•  Compressor high pressure
•  Oil return pump active