IB 9045271 (02- 2021)2
3. Disconnect all main wire harness connectors
from the main sweep control board. Set aside
all hardware used to secure main wire
harness connections to the main sweep
control board. (Fig. 4)
4. Remove the six pan screws and nylon
washers securing the main sweep board to
the control housing. Discard the removed pan
screws and nylon washers. (Fig. 2/Fig. 4)
FIG. 2
5. Carefully squeeze the plastic standoffs
securing the main sweep circuit board to the
control housing to release the circuit board
from the control housing and remove the main
sweep circuit board. Discard the removed
main sweep circuit board. (Fig. 4)
6. Remove the stand- offs previously used to
hold the main sweep circuit board to the
control housing from the control housing.
Discard the stand- offs. (Fig. 4)
7. Install new stand- offs (2) where the
stand- offs that were removed from the control
housing in the previous step were located.
(Fig. 4)
8. Place the new main sweep circuit board (1)
onto the stand- offs (2) install into the control
housing in the previous step. (Fig. 4)
9. Use the six pan screws (3) and six nylon
washers (4) to secure the main sweep circuit
board (1) into the control housing. (Fig. 4)
10.Reconnect the main wire harness to the main
sweep circuit board (1). (Fig. 4)
11. Reinstall the controls cover box onto the
control housing. (Fig. 4)
12.Reinstall the left side cover onto the machine.
13.Reconnect the battery cable to the machine.
NOTE: A Tennant Service device equipped with
Tennant Service Diagnostics software is required
to update the machine firmware after the main
sweep circuit board (1) is replaced. Refer to the
S16 SERVICE MANUAL for instructions how to
update the machine firmware after replacing the
main sweep circuit board (1).
14.Plug machine USB cable into service device
and reconfigure the machine for the new
main sweep circuit board. (Fig. 3)
FIG. 3
15.Disconnect the service device/USB cable
from the machine USB connection.
16.Turn key switch ON and test machine. Ensure
all machine systems are fully operational.
