Room Controller 2 Confi Guration; Troubleshooting - Carrier CRC2 - NTC Installationsanweisung

NTC Room Controller 2
Room Controller 2 confi guration, troubleshooting
Confi guration table for NTC units
Item Value Description
°C Temperatures displayed in degrees C
1-
°F Temperatures displayed in degrees F
Co System - CRC2 will be used with a communicating system
2-
St Stand alone system - The CRC2 will be used with a non-communicating system
0 Temperature displaying
No temperature is displayed
1 The ambient temperature will be displayed
2 The set-point temperature will be displayed
3- (In non-communicating systems the temperature range goes from 15 to 32 °C; from 59 to
90 °F)
(In non-communicating systems with Reset step 1°, the temperature range goes from 18
to 26°C; from 68 to 76 °F)
(In communicating systems with Reset step 2°, the temperature range goes from 16 to 30
°C ; from 64 to 80 °F)
Reset Step Value
This represent the value of the single segment of the bar graph
One segment = 0° (C and F)
0=0°C or 0°F
(In communicating systems with Reset step 0°, temperature is fi xed at 22 °C, 72 °F)
One segment = 1 °C or 0.9 °F
1=0,5°C or 0,9°F
(In communicating systems with Reset step 0.5°, temperature
4-
One segment = 1 °C or 1,8 °F
2=1°C or 1,8°F (In communicating systems with Reset step 1°, temperature range goes from 18 to 26 °C;
from 68 to 76 °F)
One segment = 2 °C or 3,6 °F
3=2°C or 3,6°F (In communicating systems with Reset step 2°, temperature range goes from 16 to 30 °C;
from 64 to 80 °F
Indoor fan icon displaying
0 The icon of the 3-speed indoor fan will not be displayed
5-
1 The icon of the 3-speed indoor fan will be displayed
2 The variable speed indoor motor icon will be displayed
Louver icon displaying
6- 0 The louver icon will not be displayed
1 The louver icon will be displayed

Troubleshooting

Symptom
No LCD display
+12 volts applied to Room Controller at
the correct terminals and still does not
operate
The data sent by the indoor unit are not
displayed.
Icon A is displayed. There is no active
button.
GB - 6
Possible Cause
1) mis-wiring of the 12 volt power to
Room Controller 2 control.
2) Power not online
3) No 12 volts between P and G of
terminal block.
1) The Room Controller 2 is damaged.
1) The connecting cable between the unit
to the Room Controller2 is cut or not
properly connected.
1) Interference from another interface on
the CRC2 communication line.
Things to check
1) Verify that +12V and Ground are
connected to the proper terrminals of
the Controller. Reference Installation
wiring section for correct connections
1) Check that the units main power is
connected. The main control board
should be operating normally
1) Check the installation of the J6 plug on
the main control board.
1) Check connection to J2 on the unit
and on CRC2 "I" connector.
1) Check that the LED card is connected.
Displayed
NO
NO
YES
NO
YES: Should the unit be
provided with variable speed
indoor motor, two speeds
are available: HIGH and
AUTO
YES
Solution
After disconnecting the power, correct
the wiring problem and re-cycle power.
After verifi ng the wiring to the Room
Controller 2, re-cycle the unit power.
After disconnecting the power, correct
the wiring problem and re-cycle power.
Change the Room Controller 2 and re-
cycle power.
After disconnecting the power, correct
the wiring problem and re-cycle power.
Disconnect the LED card.
For Cassette units this should be made by
disconnecting the black connector under
the grille fi lter.