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Desert Aire - CM3500 Manual
established. In this state the unit will stop and not restart until the alarm conditionis reset manually.
The red ALARM LED on the display will stay lit until the alarm is reset.
3.1.21 Fixed Speed Compressor Phase Monitor
This is an Automatic Reset alarm. The FS Phase Monitor Alarm is activated when an Aura Q-Pump
Inverter Plus unit requires a fixed speed compressor and the phase monitor detects that the fixed
speed compressor will run backwards. In this state the unit will continue to run, but not allow the fixed
speed compressor to run. The red ALARM LED on the display will stay lit until the alarm is reset.
3.2. Alarm History Screen (Figure 72)
The Alarm History Screen is accessible from the Alarm Screen by pressing the
ALARM
key.
This screen lists a history of alarm conditions by time and date which have existed on the IAQ
system. The most recent alarm will be displayed as 001 along with the Intake Air Temperature,
Intake Air Relative Humidity, Supply Air Temperature, Suction Pressure, Discharge Pressure
and the Status of the unit when the alarm occurred. On units with dual refrigerant circuits, the
suction and discharge pressures of circuit B will also be shown when the alarm occurred. The
Status number shown corresponds as follows: 0-Zone Satisfied/Off, 1-Heating, 2-Cooling,
3-Dehumidifying, 4-Dehum/Heat, 5-Dehum/Cool and 6-Low Suction Pressure.
Figure 72
To access the history of alarms, press the
DOWN
key. The last 100 alarm conditions are saved
in this history with the 101st being overwritten.
Summary of Contents for CM3500 Series
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