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22
ALARM STATE
The smoke detector enters the alarm state when the amount of
smoke particulate in the sensor’s sensing chamber exceeds the
alarm threshold value. (See Table 3.) Upon entering the alarm
state:
• The sensor’s Alarm LED and the controller’s Alarm LED
turn on.
• The contacts on the controller’s two auxiliary relays switch
positions.
• The contacts on the controller’s alarm initiation relay
close.
• The controller’s remote alarm LED output is activated
(turned on).
• The controller’s high impedance multiple fan shutdown
control line is pulled to ground Trouble state.
The SuperDuct
1
duct smoke detector enters the trouble state
under the following conditions:
• A sensor’s cover is removed and 20 minutes pass before it
is properly secured.
• A sensor’s environmental compensation limit is reached
(100% dirty).
• A wiring fault between a sensor and the controller is detected.
An internal sensor fault is detected upon entering the trouble
state:
• The contacts on the controller’s supervisory relay switch
positions. (See Fig. 27.)
• If a sensor trouble, the sensor’s Trouble LED the control-
ler’s Trouble LED turn on.
• If 100% dirty, the sensor’s Dirty LED turns on and the
controller’s Trouble LED flashes continuously.
• If a wiring fault between a sensor and the controller, the
controller’s Trouble LED turns on but not the sensor’s.
Fig. 27 — Controller Assembly
NOTE: All troubles are latched by the duct smoke detector. The
trouble condition must be cleared and then the duct smoke detec-
tor must be reset in order to restore it to the normal state.
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 (indicated by LED). Clear the condition that has
generated the trip at this sensor. Then reset the sensor by press-
ing 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, determine the
cause 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 TROUBLE LED IS FLASHING
1. One or both of the sensors is 100% dirty.
2. Determine which Dirty LED is flashing then clean that sen-
sor 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, 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 nec-
essary 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. Make sure 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 CONTROLLER’S TROUBLE LED DOES
1. Verify that the remote test/station is wired as shown in
Fig. 25. Repair or replace loose or missing wiring.
2. Configure the sensor dirty test to activate the controller’s
supervision relay. See “Changing sensor dirty test operation.”
SENSOR’S TROUBLE LED IS ON, BUT THE CONTROL-
LER’S TROUBLE LED IS OFF
Remove JP1 on the controller.
PROTECTIVE DEVICES
Compressor Protection
OVERCURRENT
Each compressor has internal linebreak motor protection. Reset
is automatic after compressor motor has cooled.
OVERTEMPERATURE
Each compressor has an internal protector ASTP (Advance
Scroll Temperature Protection) to protect it against excessively
high discharge gas temperatures. Reset is automatic.
HIGH PRESSURE SWITCH
Each system is provided with a high pressure switch mounted
on the discharge line. The switch is stem-mounted and brazed
into the discharge tube. Trip setting is 630 psig ± 10 psig (4344
± 69 kPa) when hot. Reset is automatic at 505 psig (3482 kPa).
1. SuperDuct is a registered trademark of Edwards Signaling.
ALARM
POWER
TEST/RESET
SWITCH
TROUBLE
RESET
ALARM
TROUBLE
POWER
Summary of Contents for 50LC 14
Page 26: ...26 Fig 34 50LC 14 26 Control Wiring Diagram...
Page 27: ...27 Fig 35 50LC 14 26 RTU Open Control Wiring Diagram...
Page 28: ...28 Fig 36 50LC 14 20 208 230V 3 Phase Power Wiring Diagram...
Page 29: ...29 Fig 37 50LC 24 26 208 230V 3 Phase Power Wiring Diagram...
Page 30: ...30 Fig 38 50LC 14 26 460V 575V 3 Phase Power Wiring Diagram...