Document No. 125-1902
User Guide
June 26, 2018
Page 8 of 16
Siemens Industry, Inc.
LVC2, 135 Ohm for POL220.10 and POL220.15
The LVC2 Control Board can be used to remotely
set the minimum damper position and connect the
RP and COM terminals of the device.
Figure 11. RP and OCC Terminals.
This input offsets the damper minimum position
setting (MIN POS).
When the remote potentiometer is installed, set the
MIN POS potentiometer to
0%
; the damper position
will receive positioning signals from the LVC2
Control Board.
Occupancy Input
The Economizer Controller can input an occupancy
signal from the commercial thermostat on inputs
OCC and COM. If an occupancy signal is not
available, order Jumper Accessory 985-960, and
connect to these inputs to default the occupancy
status to
ON
.
When
OFF,
the minimum damper position is
0%
.
LED Fault Detection and Diagnostics
Table 5. LED Pattern Summary.
Status
Free Cooling
LED
Demand Control
Ventilation LED
Exhaust Fan
LED
Commissioning mode
Red Blinking
Red Blinking
̶
Power-Start-up
Orange
Orange
Green
MA/OA Sensor failure in SNGL mode
Red On
̶
̶
MA/OA/RA Sensor failure in DIFF mode
Red On
̶
̶
MIN POS potentiometer Failure
Red On
̶
̶
CO2 Sensor failure when DCV is enabled
̶
Red On
̶
DCV SET/DCT ACT potentiometer failure
̶
Red On
̶
DCV SET position is inappropriate
̶
Fast Red Blinking
̶
Brownout
Red On
Red On
̶
Failure to detect valid FC Sensor mix during
initialization
Red On
̶
̶
Application
Figure 12. Connected Economizer System Components Location Example.
