Data Aire dap4 User Manual page 110

Alarm Screen Description &
Classification
*Warning
External Temp. The optional
Module Sensor Rack sensor
T** Low has a High
Temperature Temp Alarm
*Warning
External Temp. The optional
Module Sensor Rack sensor in
T** Failure Fault Alarm
*Warning
Suction High Suction
Pressure/Temp Pressure of
Temperature
EVD Failure Electronic
Valve Driver
failure
Lost Phase Phase failure
alarm when
optional power
meter installed
***Critical
High CO2 CO2 level is
higher than
alarm set point
Possible Causes
•
Faulty sensor
•
Temperature is below
rack sensor low alarm
set point
•
Faulty sensor
•
Faulty Rack Sensor
•
Compressor running
at minimal speed.
•
Heavy Load on
Evaporator.
•
Too much air flow
•
EEV failed Open
•
Faulty Sensor
•
Damaged EVD
•
EVD Sensors Failure
•
Refrigerant Charge
problem
•
Lost power on a phase
of the high voltage
supply. Unit will shut
down.
•
CO2 level is too high
110
Corrective Actions
•
Check sensor and replace
sensor
•
Check temperature of sensor
and set point for alarm
•
Check sensor and replace
sensor
•
Check senor and replace sensor
•
Check input signal to
compressor speed control and
the compressors actual speed.
•
Check temperature set point and
compressors mode of operation
(Discharge or Return control)
•
Check fan speed control and set
point
•
Check EEV
•
Replace EVD
•
Check or replace sensors
•
Check refrigerant charge
•
Check high voltage connections
to unit. Check power meter or
phase loss detector
•
Check CO2 level in the air and
check the CO2 valve to make
sure it turns off