Staged Air Volume (Sav™) With Variable Fre- Quency Drive; Multi-Speed Vfd Display Kit (Field-Installed Accessory) - Carrier WeatherExpert 48LC Series Installation Instructions Manual

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 Frequen-
cy Drive (VFD) to automatically adjust the indoor fan motor
speed in sequence with the unit's ventilation, cooling and heating
operation (see Fig. 64 and 65). Per ASHRAE 90.1-2016 during
the first stage of cooling operation the SAV system will adjust the
fan motor to provide 66% of the design airflow rate for the unit.
When the call for the second 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 system will operate the fan motor at 66% speed.
Variable
Frequency
Drive (VFD)
Fig. 64 — VFD Location
Filter - used on
575V units only!
48
Fig. 65 — Variable Frequency Drive (VFD)
Multi-Speed VFD Display Kit (Field-Installed
Accessory)
NOTE: The Remote VFD Keypad is part of the Multi-Speed VFD
display kit (PN: CRDISKIT002A00) which is a field-installed ac-
cessory. It is not included with the 48LC 08-12 base units.
The VFD keypad as shown in Fig. 66 consists of the following
sections.