38
Sensor’s Trouble LED is On:
1. Check the sensor’s Dirty LED. If it is flashing, the
sensor is dirty and must be cleaned.
2. Check the sensor’s cover. If it is loose or missing,
secure the cover to the sensor housing.
3. Replace sensor assembly.
Sensor’s Power LED is Off:
1. Check the controller’s Power LED. If it is off,
determine why the controller does not have power
and make the necessary repairs.
2. Check the wiring between the sensor and the
controller. If wiring is loose or missing, repair or
replace as required.
Controller’s Power LED is Off:
1. Ensure the circuit supplying power to the controller is
operational. If not, make sure JP2 and JP3 are set
correctly on the controller before applying power.
2. Verify that power is applied to the controller’s supply
input terminals. If power is not present, replace or
repair wiring as required.
Remote Test/Reset Station’s Trouble LED Does Not
flash When Performing a Dirty Test, But the Control-
ler’s Trouble LED Does:
1. Verify that the remote test/station is wired as shown
in Fig. 53. Repair or replace loose or missing wiring.
2. Configure the sensor dirty test to activate the
controller’s supervision relay. See “To Configure the
Dirty Sensor Test Operation” for details.
Sensor’s Trouble LED is On, But the Controller’s
Trouble LED is OFF:
Remove JP1 on the controller.
Supply Air Temperature (SAT) Sensor — On
FIOP−equipped 50TCQ unit, the unit is supplied with a
supply−air temperature (SAT) sensor (p/n:33ZCSENSAT).
This sensor is a tubular probe type, approx 6−inches (12.7
mm) in length. It is a nominal 10−k ohm thermistor. See
PremierLinkt Installation, Start−Up and Configuration
Instructions. for temperature−resistance characteristic.
PREMIERLINK
E
CONTROL
The PremierLink controller (see Fig. 56) is compatible
with Carrier Comfort Network (CCN) devices. This
control is designed to allow users the access and ability to
change factory−defined settings, thus expanding the
function of the standard unit control board. CCN service
access tools include System Pilot, Touch Pilot and
Service Tool. Standard tier display tools Navigator and
Scrolling Marquee are not suitable for use with latest
PremierLink controller (Version 2.x).
The PremierLink control is factory−mounted in the
50TCQ unit’s main control box to the left of the CTB.
Factory wiring is completed through harnesses connected
to the LVTB. Field connections are made at a 16−pole
terminal block (TB1) located on the bottom shelf of the
unit control box in front of the PremierLink controller The
factory−installed PremierLink control includes the
supply−air temperature (SAT) sensor. The outdoor air
temperature (OAT) sensor is included in the
FIOP/accessory EconoMi$er 2 package.
Refer to Fig. 56 for PremierLink connection locations.
NOTE: Refer to PremierLinkt Installation, Start−Up
and Configuration Instructions. Have a copy of this
manual available at unit start−up.
C08199
Fig. 56 − PremierLink Controller
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