50
TC5-1V6SA.rev.06
TC5-1V6SA
SOLUTION
PROBLEM
CAUSE
Stage 1 fans
run continu-
ously at full
speed.
The wiring is incor-
rect.
The ambient tempera-
ture is above the set
point.
Fix the wiring.
Adjust the set point to the
desired value.
Stage 1 fans
run errati-
cally.
The selected motor
curve is inappropri-
ate.
Select an appropriate motor
curve.
The differential is too
small.
Adjust the differential to a
higher value.
The time on or time
off is too short.
Adjust the time on or time off to
a higher value.
Time off is set to zero.
Set time off to a value other than
zero.
Stage 1 fans do
not stop
running when
the controller
is operating in
minimum
ventilation
cycle.
The wiring is incorrect.
Correct the wiring. In particular,
make sure two different lines
are connected to each motor:
line L1 modulated by the
controller should be combined
with another line (N for 115V or L2
for 230V) to activate the motor.
Also, be sure the stage 1 COM-
MON is supplied by line L1.
Humidity compensation
is activated and relative
humidity exceeds set
point.
Adjust set point or deactivate
compensation as required.
