Carrier 50TC Series User Manual

42
Table 9 – LEDs
The LEDs on the RTU Open controller show the status of certain functions
If this LED is on... Status is...
Power The RTU Open controller has power
Rx The RTU Open controller is receiving data from the network segment
Tx The RTU Open controller is transmitting data over the network segment
BO# The binary output is active
The Run and Error LEDs indi cate cont rol module and network sta tus
If Run LED shows... And Error LED shows... Status is...
2 flashes per second Off Normal
2 flashes per second 2 flashes, alternating with Run LED Five minute auto---restart delay after system error
2 flashes per second 3flashes,thenoff Control module has just been formatted
2 flashes per second 4 flashes, then pause Two or more devices on this network have the
same MSTP network address
2 flashes per second On Exec halted after frequent system errors or
control programs halted
5 flashes per second On Exec start---up aborted, Boot is running
5 flashes per second Off Firmware transfer in progress, Boot is running
7 flashes per second 7 flashes per second, alternating
with Run LED
Ten second recovery period after brownout
14 flashes per second 14 flashes per second,
alternating with Run LED
Brownout
On On Failure. Try the following solutions:
S Turn the RTU Open controller off, then on.
S Format the RTU Open controller.
S Download memory to the RTU Open controller .
S Replace the RTU Open controller.
NOTE: Refer to the RTU Open Multi--Pr otocol Controller
Controls, Start--Up, Operation and Tr oubleshooting manual
for complete configuration of RTU Open controller ,
operating sequences and troubleshooting information. Refer
to the RTU Open v3 Integration Guide for details on
configuration and troubleshooting of connected networks.
Have a copy of these manuals available at unit start--up.
Outdoor Air Enthalpy Control
(PNO
33CSENTHSW)
The enthalpy control (33CSENTHSW) is available as a
field--installed accesso ry to be used with the EconoMi$er
R
2
damper system. The outdoor air enthalpy sensor is part of
the enthalpy contro l. (The separate field--ins talled accessory
return air enthalpy sensor (33CSENTSEN) is required for
differential enthalpy control. See Fig. 72.)
Loca te the enthalpy control in the economizer next to the
Actuator Motor. Locate two GRA leads in the factory
harness and connect the gray lead labeled “ESL” to the
terminal labeled “LOW”. See Fig. 72. Connect the
entha lpy control power input termina ls to economizer
act uator power le ads RED (connect to 24V) and BL K
(connect to GND).
7
CTB ECON
(P’LINK: to J4-2) or
(RTU Open: to J2-6)
LOW
GND
24V
Enthalpy
Switch
GRA
BLK
RED
Factory Wiring Harness
PL6-1 (24-V)
PL6-4 (COM)
C11160
Fig. 72 -- Enthalpy Switch (33CSENTHSW) Connections
The outdoor enthalpy changeover setpoint is set at t he
enthalpy controller.
Differential Enthalpy Control —
Differential enthalpy control i s provided by sensing and
comparing the outside air and return air enthalpy
conditions. Install the outdoor air enthalpy control as
described above. Add and i nstall a return ai r enthalpy
sensor.
50TC

Carrier 50TC Series Specifications

General

Brand	Carrier
Model	50TC Series
Category	Air Conditioner
Language	English