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Smart Touch Cabin Control Installation & Operations Manual
17. Supply Air Temp Limit Enabling this parameter has no effect unless
General Setting Electric Heat Option is also enabled (set to "On"). Use of this
parameter requires that the OAT sensor is placed in the supply air stream
immediately downstream of the blower discharge. This setting is the
maximum the supply air discharge temperature will allow. Heat mode will be
shut down if the temperature of this sensor exceeds the programmed
setpoint. Heat mode will be restored once a 10°F hysteresis has been
satisfied. Heat mode will also be restored if power is cycled to the control and
the OAT sensor temperature is less than the setting but still within the
hysteresis. There is no fault indication when this condition occurs and no
lock-out. The discharge temperature can be displayed by pressing the
temperature icon until the temperature title shows Outside (same as viewing the Outside Air Temperature).
18. DX/CW Mode Selection Choosing "Set by Jumper" preserves the status of the Passport I/O operation where if the "Cut
for Chill" jumper on the main PPIO board is not cut, the Smart Touch will operate in DX mode, and if the jumper is cut, the
Smart Touch will operate in CW mode. The other choices for this parameter allow the jumper to be overridden, if desired.
19. Inside Temp Sensor Selection If the alternate air temperature sensor is
plugged into the Passport I/O main board, it is used as the inside
temperature, and if it is not plugged in, the built-in display temperature
sensor is used for inside temperature. This parameter allows this behavior to
be overridden if desired.
20. Fan Operational Mode The fan can be set to run continuously whenever the
system is turned on, or it can be set to cycle on and off in conjunction with
the cooling or heating cycles.
21. Dual Temp Set Points When Off, there is only one common set point, which
is adjustable and used for both heating and cooling. When On, two separate
set points are settable and used, one for cooling and one for heating.
DX Operational Settings
1.
Compressor Start Delay The compressor staging delay is for installations where more than one system operates from
the same power source. Setting different staging delays allows compressors to start at different times when power is
interrupted. Stage the units at least 5 seconds apart. Minimum delay is 5 seconds and maximum is 135 seconds.
2.
Failsafe To protect the equipment, certain fault conditions trigger a lockout: The control shuts down and will not restart
until the fault is repaired. The lockout condition depends on a combination of the failsafe level you have programmed
as well as the type of fault detected.
There are 4 different Failsafe levels to choose from.
a.
Faults Not Detected - This level provides minimal failsafe protection and is not recommended. Only the "Air
Sensor Failure" fault is detected and displayed. The control shuts down and will not restart until the fault is
repaired. When the fault is repaired the control restarts after a 2-minute delay.
b.
Faults Detected But Not Displayed - This level provides the failsafe actions of Faults Not Detected, plus all
other faults are detected but not displayed. The system shuts down for 2 minutes or until the fault is cleared,
whichever is longer. The system restarts when the fault is cleared.
c.
Faults Detected and Displayed - This level provides the failsafe actions of the previous two levels, plus all faults
are displayed. The system shuts down for 2 minutes or until the fault is cleared, whichever is longer. The system
restarts when the fault is cleared.
d.
Faults Detected and Displayed with Lockout - This level provides the failsafe actions of previous 3 levels, plus
the system will lockout after four consecutive High Pressure Fault, Low Pressure Fault, or High Water
Temperature in Condenser Coil faults, and you can clear the lockout. The system shuts down for 2 minutes or until
the fault is cleared, whichever is longer. To clear the lockout, press the Power icon once to Off Mode and press it
again to On Mode.
L-3380 ENGLISH
OPERATION
Figure 17: Smart Touch General
Settings Page 6 of 7
Figure 18: Smart Touch General
Settings Page 7 of 7
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