14
TC5-1N5FAB rev.06
TC5-1N5FAB
The parameter settings can be locked to prevent accidentally modifying
them. When the settings are locked, only the temperature set point and the
Stage 1 minimum ventilation speed can be modified (as long as the tem-
perature curve and the minimum ventilation speed curve are deactivated
respectively).
To lock the parameter settings:
n
Set internal switch # 1 to
ON
.
To unlock the parameter settings:
n
Set internal switch # 1 to
OFF
.
L
OCKING THE PARAMETER SETTINGS
78.0
St 2
2.3
(iii) When the user turns the adjustment knob to make an adjustment to the
stage 2 differential, the relative value reappears on the display.
In the case of the mist and heating units, the starting temperature is displayed
with the letters "
STr
" when adjusting the differential and the stopping
temperature is displayed with the letters "
STP
" when adjusting the offset.
59
TC5-1N5FAB rev.06
TC5-1N5FAB
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
COMMON is supplied by line L1.
Humidity compensation
is activated and relative
humidity exceeds set
point.
Adjust set point or deactivate
compensation as required.
