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50
If one or more alarms are present and there has been no keypad
activity for at least 5 minutes, the Alarms menu displays and
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 (
2
/
3
) of
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
2
/
3
VFD and Fig. 55 for the VFD location.
Fig. 54 — Variable Frequency Drive (VFD)
Summary of Contents for 50LC 14
Page 26: ...26 Fig 34 50LC 14 26 Control Wiring Diagram...
Page 27: ...27 Fig 35 50LC 14 26 RTU Open Control Wiring Diagram...
Page 28: ...28 Fig 36 50LC 14 20 208 230V 3 Phase Power Wiring Diagram...
Page 29: ...29 Fig 37 50LC 24 26 208 230V 3 Phase Power Wiring Diagram...
Page 30: ...30 Fig 38 50LC 14 26 460V 575V 3 Phase Power Wiring Diagram...