Installation & Operating Instructions
BAPI-Stat 4 Sensor, w/Display, Button Setpoint, Fan or System Mode Control
BA/BS4M Temperature Sensor
Specifications subject to change without notice.
rev. 01/18/16
25188_ins_BS4M
7 of 8
General Diagnostics
POSSIBLE PROBLEM:
POSSIBLE SOLUTIONS:
Temperature reading is incorrect
- Verify that the input is set up correctly in the controller’s and building
automation software.
- Check wiring for proper termination and check for opens or shorts.
- Measure the room temperature at the sensor’s location using an accurate
temperature standard. Disconnect the temperature sensor wires and
measure the temperature sensor’s resistance across the sensor output
pins with an ohmmeter. Compare the temperature sensor’s resistance
to the appropriate temperature sensor table on the BAPI website. If the
measured resistance varies by more than 5% from the temperature table,
call BAPI technical support. To view the temperature table, go to the BAPI
website (www.bapihvac.com), click on “Resource Library” and “Sensor
Specs”, then click on the type of sensor you have.
- If the unit has a test and balance switch, make sure that it is in the correct
position.
Setpoint reading is incorrect
- Make sure that the setpoint output is correct. Remove the setpoint output
wire and check the output for the correct resistance or voltage output. See
the product label for your specific range.
Override is not working correctly
- Check that the resistance across the override output is less than 5Ω when
the override is pushed.
Fan Mode not correct
- Make sure that the fan mode output is correct. Remove the fan mode
output wire and check the output for the correct resistance. See the
product label for your specific range and compare it to the resistance chart
at the bottom of page 3. Don’t forget to reconnect the wire.
When the Override pushbutton is pressed, the BAPI-Man (Fig. 11) will be displayed as “Solid” for 3-5 seconds and the
override output will shunt or short for 3 seconds depending on the override option selected. The various options are
described below.
-N Option = Momentary Temperature Sensor Shunt to < 15Ω
-P Option = Momentary Setpoint Shunt to <15Ω
-J Option = Momentary Override as a Separate Shorting Contact Output on OVR1 & OVR2
BAPI-MAN ICON:
The BAPI-Man Icon shows the status of the room – Solid for Occupied, Hollow for “Unoccupied” (Fig. 11). The unit must
receive a confirmation (ground) signal on the “EXT OVR” terminal for the BAPI-Man to remain visible on the screen.
Pressing the Override button will light the BAPI-Man icon; however, if no confirmation signal is received, then the BAPI-
Man will go blank (disappear) after 5 seconds. Upon receiving a first confirmation (ground) signal on the “EXT OVR”
terminal, the BAPI-Man will show occupied (Solid). The BAPI-Man will then show unoccupied (Hollow) whenever the
confirmation signal is removed and occupied when the signal is returned. The only way to blank or remove the BAPI-Man
from the display after receiving a confirmation signal is to cycle power.
Momentary Override Operation (Non-Latching)
