Data Sheet for Product

Information in this document is based on specifications believed correct at the time of publication. The right is reserved to make changes as design

improvements are introduced. Other product or company names mentioned herein may be the trademarks of their respective owners.

Siemens Building Technologies, Inc. Printed in the U.S.A.

1000 Deerfield Parkway Document No. 127-0577

Buffalo Grove, IL 60089-4513 Page 2 of 2

U.S.A.

Table 1. Chilled Water Cooling and Electric Heat – Valve Control Unit Ventilator.

Point Type Description Range/Units

25 LAO Heating Set Point

55°F – Cooling Set Point minus 6°F

26 LAO Tenant Override Time. Whenever tenant override switch on wall

thermostat is pressed, unit vent controller enters 120 minutes (time-

left-in-override-mode) for this point. Similarly, unit can be

commanded to override mode by setting point to number of minutes

of override desired.

0 – 1275 Minutes

27 LAI Occupied/Unoccupied/Override Mode 0 = Unoccupied

1 = Occupied

2 = Tenant Override

99 LDI Device Communication Failure Normal/Failed

Table 2. Unit Vent Mode/Fault (Point 21).

Value Mode

0 Unoccupied. Also, set point to this value to clear faults.

1 Occupied

2 Tenant Override

3 Load Shed

4 Tenant Load Shed

5 Defrost

188 Communication Error

189 Change Filter

190 Suction Line Temperature Sensor Bad

191 Water In Temperature Sensor Bad

192 Mixed Air Temperature Sensor Bad

193 Outside Air Temperature Sensor Bad

194 Discharge Air Temperature Sensor Bad

195 Outside Air Damper Position Potentiometer Bad

196 Heating Valve Position Potentiometer Bad

197 Cooling Valve Position Potentiometer Bad

198 Brownout

199 Low Temperature

200 Low Water Temperature

201 High Pressure

202 Room Temperature Sensor