Drive - Carrier WeatherExpert 48LC 14 Series Service And Maintenance Instructions

cycles through the active alarms. You can also navigate to the
Alarms menu at any time.
Clearing Alarms
Once the alarm has been identified and the cause has been re-
moved (e.g. replaced faulty sensor) the alarm can be cleared
from the display.
To clear an alarm, perform the following:
1. Navigate to the desired alarm.
2. Press the (Enter) button. ERASE? displays.
3. Press the (Enter) button. ALARM ERASED displays.
4. Press the (Menu up/Exit) button to complete the
action and return to the previous menu.
NOTE: If the alarm still exists after clearing it, it is redisplayed
within 5 seconds.
Staged Air Volume (SAV™) with Variable Fre-
quency Drive
The Staged Air Volume (SAV) system utilizes a Variable Fre-
quency Drive (VFD) to automatically adjust the indoor fan mo-
tor speed in sequence with the unit's ventilation, cooling and
heating operation. Per ASHRAE 90.1 2010 standard section
6.4.3.10.b, during the first stage of cooling operation the SAV
system will adjust the fan motor to provide two-thirds (
the design airflow rate for the unit. When the call for the sec-
ond stage of cooling is required, the SAV system will allow the
design airflow rate for the unit established (100%). During the
heating mode, the SAV system will allow total design airflow
rate (100%) operation. During ventilation mode, the SAV sys-
tem will operate the fan motor at
VFD and Fig. 53 for the VFD location.
/ ) of
2
3
/ speed. See Fig. 52 for the
2
3
Fig. 52 — Variable Frequency Drive (VFD)
51