Data Sheet for Product

Page 4 of 8 Siemens Building Technologies, Inc.
Document No. 127-0014
Table 4. Alarms: Warning Conditions
(Points 21 and 43) for Input Points.
Value Description
1 Final Filter Dirty. Pressure drop above limit.
2 Airflow Warning – Unit is Off and Digital Input
Indicates Airflow.
3 Economizer Stuck. The Economizer is either Open
when the Unit is Off or it is not completely Open when
it should be.
Table 5. Alarm: Problem Conditions
(Points 21 and 43) for Input Points.
Value Description
4 No Water Flow
5 Heat Fail. Only for units with electric heating.
7 Mixed Air Temperature Sensor Shorted or Open
8 Outdoor Air Temperature Sensor Shorted or Open
9 Return Air Temperature Sensor Shorted or Open
10 Space Temperature Sensor Shorted or Open
11 Supply Air Temperature Sensor Shorted or Open
12 Entering Water Temperature Sensor Shorted or Open
13 Compressor No. 1 Failure
14 Compressor No. 2 Failure
15 Compressor No. 3 Failure
16 Compressor No. 4 Failure
17 Compressor No. 5 Failure
18 Compressor No. 6 Failure
19 Current Sensor Shorted or Open
20 Velocity Sensor Shorted or Open
21 Low Speed Fan Failure
22 High Speed Fan Failure
23 Freeze Problem. Digital freeze input closes after unit
is turned off.
34 High Temperature Rise. Supply Air Temperature
Mixed Air Temperature > High Limit (60°F Default).