Emerson Liebert Prop Fan Condensing Unit Manual de instalación descargar pdf (Pagina 51)

Alarms

5.1.3 Humidity Level

The humidity level alarm may be activated under the following conditions:

• High: The room return air humidity exceeds the pre-set high humidity alarm set point. Is the

unit set up for dehumidification? Check DIP switch.

• Low: The room return air humidity decreases to the low humidity alarm set point. Is the unit

setup for humidification? Check DIP switch.

• High and Low Humidity (simultaneously): The simultaneous display of two alarms results in

loss of the humidity input signal. DASHES WILL BE DISPLAYED IN THE HUMIDITY READ-

ING DISPLAY. Under these conditions, the control system deactivates both humidification and

dehumidification. Check for a disconnected cable or failed sensor.

5.1.4 Temperature

The temperature level alarm may be activated under the following conditions:

• High: The room return air temperature increases to the high temperature alarm set point. Check

for proper set point value. Is the room load more than the unit can handle (i.e., capacity too

small)? Make sure cooling components are operating (compressor or valves).

• Low: The room return air temperature decreases to the low temperature alarm set point. Check

for proper set point value. Make sure all heating components are operating (e.g., contactors,

reheats, etc.). Are reheats drawing the proper current (refer to amp rating on nameplate).

• High and Low (simultaneously): The simultaneous display of these two alarms results in loss

of the temperature input signal (or the humidity is out of sensor range-15 to 85% RH). Dashes will

be displayed for the temperature reading. The control system will initiate 100% cooling. Check for

a disconnected cable or a failed sensor.

5.1.5 Humidifier Problem Alarm

The Humidifier Problem Alarm will sound and display a message if any of the following humidifier

conditions occur: overcurrent detection; fill system fault or end of cylinder life.

Check fault indicator LED on humidifier control board:

• Constant LED on = Overcurrent

• 1 second LED Flash = Fill System

• 1/2 second LED Flash = Replace Tank

5.1.6 High Water Alarm

A float switch in the evaporator pan will shutdown the evaporator on a high water level. Clear the

drain and reset power to the unit in order to clear the alarm.

5.1.7 Loss of Power:

The Loss of Power Alarm will activate (after power is restored to the unit) if the unit has lost power or

the disconnect switch was incorrectly turned off before the unit ON/OFF switch was pressed. A Lie-

bert remote monitoring unit (optional) will immediately indicate loss of power.

5.1.8 Short Cycle

A Short Cycle Alarm will occur if the compressor system has exceeded 10 cooling start attempts in a

one-hour period. This can be caused by low refrigerant level or room cooling load is small compared to

capacity of the unit. Check for leaks, crimped lines and defective components. If room load is low,

increase temperature sensitivity to reduce cycle.

NOTE

Check for proper set points. Does the room have a vapor barrier to seal it from outdoor

humidity? Are doors or windows open to outside air?

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 67 68

Comentarios a estos manuales

Sin comentarios

Emerson Liebert Prop Fan Condensing Unit Manual de instalación Pagina 51

Comentarios a estos manuales

Relacionado con productos y manuales para Acondicionadores de aire del sistema de división Emerson Liebert Prop Fan Condensing Unit