Carrier Gen 2 Vvt Manual

Zone Controller Reset ÐThe zone controller con-
stantly veri®es operation and the information it utilizes. When
it ®nds a fault in a speci®ed area, the zone controller resets
using the zone controller initialization display.
The zone controller will reset when it ®nds fault in the
following areas:
· The ability of the microprocessor to properly operate the
programs used by the zone controller is veri®ed to prevent
improper response to zone and system conditions.
· The level of power used by the zone...

Alarm Routing Control ÐThe Alarm Routing Con-
trol option determines which devices on the CCN will re-
ceive and process the alarm information. This option cannot
be con®gured from the monitor thermostat. The default value
is 00000000. A value of 10000000 sends alarms to the Build-
ing Supervisor. A value of 01000000 sends alarms to the Auto-
Dial gateway. A value of 00010000 sends alarms to the printer
interface. This value sends/marks alarms for building super-
visors autodial gateways. A value of...

When the CO2level exceeds the preset level (factory
con®guration is 1000 ppm and cannot be changed without
optional software), the sensor signals the monitor thermo-
stat. The monitor thermostat energizes the indoor-fan motor
(if not already running). If the Auxiliary Relay has been con-
®gured for IAQ operation, the monitor thermostat energizes
the relay after the time delay on the ®rst IAQ alarm of the
day, or immediately on any other IAQ alarms. This is in-
tended for use with an economizer, but can...

General Operating Problems
NO DISPLAY Ð If the zone controller display remains blank
after 24 vac power has been applied to the damper actuator,
it is an indication that power is not reaching the zone
controller.
At the damper actuator, check that 24 vac is being sup-
plied from the power transformer. Acceptable voltage range
is 22 to 30 vac.
The va requirements are:
· 20 va for dampers only. (No relay packs or pressure
sensors.)
· 25 va for dampers interfaced with a relay pack or a pres-
sure sensor.
·...

Supplemental Heat Problems ÐWhen the zone
controller is interfaced to supplemental/auxiliary heating equip-
ment, use the following section to troubleshoot problems
related to the supplemental heat operation.
SUPPLEMENTAL HEAT (SUH) ANNUNCIATOR NOT
DISPLAYED Ð The zone controller does not activate supple-
mental heat upon 1.5É F demand (no SUH annunciator
displayed).
If the zone controller zone has a heating demand of 1.5É F
or more and the optional supplemental or auxiliary heat is
not energized, the...

Fig. 13 Ð Damper Actuator Relay
Fig. 14 Ð Relay Pack Wiring
26 

Ribbon Strip
Metal PinsCorresponding wire
connected to
Terminal Block
``TOP 1st Pin SBO +
2nd Pin Red
3-Wire Cable
Communication Bus 3rd Pin Black
4th Pin Green
5th Pin SBO-
6th Pin White
7th Pin Red
5-Wire Cable
to Damper or
Single Zone
Relay Pack 8th Pin Blue
9th Pin Yellow
10th Pin Green
11th Pin Red (RS+)
``BOTTOM 12th Pin Black (RSþ)
}
}
LEGEND
SBO ÐSetback Override
TVA ÐTransient Voltage Arrestor
NOTES:
1. By checking continuity on ribbon strip pins, continuous or intermittent problems with
the...

INDEX
Access Security Level, 7
Alarm Description, 22
Alarm Options, 21
Alarm Routing Control, 22
Alarm System Name, 22
Alternate Information Display, 5
Associated Control System Mode, 12
Blinking Display, 24
Broadcast, 21
Broadcast Acknowledge, 21
Cannot Detect Closed Damper, 19
Cannot Detect Open Damper, 19
Comfort Trend Error, 17
Common Causes of System Communication Problems, 24
Common Communication Related Problems, 24
Communication Failure Retry Time, 21
Computer Con®guration, 5
Con®guration, 4...