Protective Devices - Carrier 50TC*17 Series Service And Maintenance Instructions

Nominal 15 to 27.5 tons, with puron r-410a refrigerant

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Table of Contents

CONTROL OR INDICATOR

Magnetic test/reset switch

Alarm LED

Trouble LED

Dirty LED

Power LED

Resetting Alarm and Trouble Condition Trips:

Manual reset is required to restore smoke detector systems

to Normal operation. For installations using two sensors,

the duct smoke detector does not differentiate which

sensor signals an alarm or trouble condition. Check each

sensor for Alarm or Trouble status. Clear the condition

that has generated the trip at this sensor. Then reset the

sensor by pressing and holding the reset button (on the

side) for 2 seconds. Verify that the sensor's Alarm and

Trouble LEDs are now off. At the controller, clear its

Alarm or Trouble state by pressing and holding the

manual reset button (on the front cover) for 2 seconds.

Verify that the controller's Alarm and Trouble LEDs are

now off. Replace all panels.

Troubleshooting

Controller's Trouble LED is On

1. Check the Trouble LED on each sensor connected to

the controller. If a sensor's Trouble LED is on, deter-

mine the cause and make the necessary repairs.

2. Check the wiring between the sensor and the con-

troller. If wiring is loose or missing, repair or replace

as required.

Controller's Trouble LED is Flashing

1. One or both of the sensors is 100% dirty.

2. Determine which Dirty LED is flashing then clean

that sensor assembly as described in the detector

cleaning section.

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, se-

cure 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, deter-

mine why the controller does not have power and

make the necessary repairs.

2. Check the wiring between the sensor and the con-

troller. If wiring is loose or missing, repair or replace

as required.

Table 7 – Detector Indicators

Resets the sensor when it is in the alarm or trouble state. Activates or tests the sensor when it is in

the normal state.

Indicates the sensor is in the alarm state.

Indicates the sensor is in the trouble state.

Indicates the amount of environmental compensation used by the sensor

(flashing continuously = 100%)

Indicates the sensor is energized.

DESCRIPTION

Controller's Power LED is Off

1. Make sure the circuit supplying power to the con-

troller 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 re-

pair wiring as required.

Remote Test/Reset Station's Trouble LED Does

Not flash When Performing a Dirty Test, but the

Controller's Trouble LED Does

1. Verify that the remote test/station is wired as shown

in Fig. 40. Repair or replace loose or missing wiring.

2. Configure the sensor dirty test to activate the con-

troller 's supervision relay. See "Changing Sensor

Dirty Test Operation."

Sensor's Trouble LED is On, But the Controller's

Trouble LED is OFF

Remove JP1 on the controller.