Carrier Gen 2 Vvt Manual

							VELOCITY PRESSURE PROBE GAIN Ð The pressure
pickup which sends the pressure data can distort data due to
placement, vibration, or other factors. The Velocity Pressure
Probe Gain option allows a multiplier to be added to the value
being read by the pressure pickup. The default is 1.0 (mul-
tiplying by 1 results in an identical value). The range of
values is 0.5 to 5.0. To con®gure the Velocity Pressure Probe
Gain option, set category 5, option 6. Enter the gain for the
pickup probe speci®ed per the manufacturer.
PRESSURE SENSOR RE-ZERO Ð To assure that the
zone controller is able to maintain proper static pressure
levels during normal operation, the zone controller will
automatically re-zero when the Auto-Zero Enable option is
selected.
To auto-zero the pressure sensor, select category 5, option 7
(Auto-Zero Enable). Set the option to ON. The zone con-
troller will turn off the system fan and allow time for the
pressure to settle. The zone controller will wait until the pres-
sure in the system has dissipated before zeroing the sensor.
Once this time period expires, the zone controller will au-
tomatically zero the pressure sensor and reset the option to
OFF.
POSITION DAMPER (Pressure Independent Only) Ð The
zone controller damper position can be forced to any posi-
tion through the Position Damper option when in pressure
independent operation. This can be used to help determine
the desired velocity pressure when using pressure inde-
pendent control. To con®gure this option, select category 5,
option 8. The current damper position will be shown. Use
the left set point buttons to adjust the value. The range of
values is 0 to 15, with 0 fully closed and 15 fully open. The
default is 0.
Velocity Pressure Probe Calibration ÐThe ve-
locity pressure probe is used in conjunction with the zone
controller for Pressure Independent operation. Refer to the
pressure sensor installation instructions for more informa-
tion on tubing and sensor location.
To calibrate the velocity pressure probe, perform the fol-
lowing procedure:
1. Install a manometer or Magnehelic gage in parallel with
the pressure sensor. Tee the Magnehelic gage high port
into the high port of the pressure sensor. The high pres-
sure port is indicated with a P1 on the sensor. Tee the
Magnehelic gage low port into the low port of the pres-
sure sensor. The low pressure port is indicated with a P2
on the sensor.
2. Con®gure the zone controller pressure sensor range (cat-
egory 5, option 5). The value of 0.5 in. wg should be set
for use with a 33CSPS-01. Verify that it is set correctly.
3. Con®gure the zone controller Velocity Pressure Probe Gain
option (category 5, option 6). The default value is 1.0.
The value entered for Velocity Pressure Probe Gain is based
on which model PSP (Pressure Static Pickup) is used.
A value of 2.3 (1.56 for 350-v) should be used for all
PSP models.
4. Initiate the zone controller Auto-Zero function (category
5, option 7). Set the value to ON. The zone controller
will position its damper full closed and zero the sensor
reading. Once this is complete, the zone controller will
automatically turn the option to OFF.
5. Initiate the zone controller Position Damper function (cat-
egory 5, option 8). Adjust the damper position until the
desired velocity pressure is obtained at the manometer or
Magnehelic gage.
6. Calibrate the pressure sensor (category 5, option 9). Ad-
just the displayed value until it matches the measured value
of the manometer or Magnehelic gage.7. Set the Minimum and Maximum Air¯ow Set Points (cat-
egory 3, options 7 and 8). Set the Minimum Air¯ow Set
Point to allow acceptable fresh air requirements. Set the
Maximum Air¯ow Set Point so acceptable noise levels
are not exceeded.
8. Set the Damper Size option (category 3, option 9). The
value is set in square inches and is the cross sectional
area in which the probe is located.
9. Enable Pressure Independent Control (category 3, option 4).
Set the value to ON.
Indoor-Air Quality Sensor ÐThe Comfort IAQ fea-
ture allows the Carrier Comfort system to interface with the
economizer on the HVAC equipment and maintain the qual-
ity of indoor air within acceptable limits. An IAQ sensor (CO
2)
is used to monitor the IAQ levels in a zone or in the return
air duct. On zone controllers, the zone controller is con®g-
ured to either participate in the IAQ system, ignore IAQ com-
mands, or run IAQ monitoring locally.
When the CO
2level exceeds the preset level (factory con-
®guration is 1000 ppm), the sensor signals the indoor-fan
motor to run. The indoor fan circulates the air throughout
the occupied space. At the end of 5 to 30 minutes (on the
®rst IAQ alarm of the day only), if the CO
2level still
exceeds the set point, the indoor fan will stay energized. The
zone controller opens the zone damper to the full open po-
sition (in local mode) or all the participating zone dmapers
open (in system IAQ mode). This forces fresh outside air to
enter the zone(s) with de®cient IAQ. When the IAQ level
drops below the IAQ set point, the zone dampers return to
their standard operating mode.
When the system is bringing in additional outside air, the
thermostat is reset 0 to 10É F (®eld-con®gured) above or be-
low the original set point to allow the outside air to circulate
before the heating or cooling mode is initiated. If a CHR-06
or CHR-06W relay pack is used, the auxiliary contact can be
used to start a local exhaust fan when the system is bringing
in additional outside air. The zone controller will display
status when the system is in this mode.
SYSTEM IAQ PARTICIPATION Ð To con®gure the Sys-
tem IAQ Participation option, set category 14, option 1. When
the option is con®gured ON, the zone controller will modu-
late in IAQ mode during fan operation. When the option is
con®gured OFF, the IAQ commands from the system are not
used. The default is OFF.
LOCAL IAQ SENSOR Ð The Local IAQ Sensor function
speci®es if the zone controller (or controlling monitor ther-
mostat) is using a CO
2sensor. If the option is set to ON, the
zone controller monitors the input of the sensor. If the op-
tion is set to OFF, the zone controller does not monitor the
input of the sensor.
To con®gure the Local IAQ Sensor option, set category
14, option 2. Use the left set point buttons to toggle the op-
tion ON or OFF. The default is OFF.
IAQ MAXIMUM SPACE TEMPERATURE RESET Ð When
the IAQ mode brings in fresh outdoor air, the space tem-
perature will rise or drop depending on the outside-air tem-
perature. The IAQ Maximum Space Temperature option will
keep the HVAC equipment from entering heating or cooling
unless the temperature change is greater than the set point.
This keeps the heating or cooling equipment from coming
on during IAQ mode. The option is con®gured in category
14, option 3. The set point can be con®gured from 0 to
10É F. The default value is 2É F.
NOTE: The IAQ Maximum Space Temperature Reset op-
tion is always displayed is Fahrenheit, even when the Fahr-
enheit Temperature Display option (category 1, option 6) is
set to OFF.
11 
						

							IAQ ALARM DELAY Ð The IAQ Alarm Delay option con-
trols how long the zone controller will wait before issuing
an IAQ alarm. To con®gure the IAQ Alarm Delay option,
set category 14, option 4. The number of minutes will be
shown. The range of acceptable values is 0 to 240 minutes
in 1-minute increments. Use the left set point buttons to set
the time limit to the desired value. The default value is
0 minutes.
DAMPER CONTROL
The zone controller modulates a zone damper to maintain
the zone temperature conditions as determined by the oc-
cupied or unoccupied set points.
The zone controller has 5 modes of damper operation
available:
· system mode
· local mode
· damper ventilation mode
· IAQ mode
· damper supplemental heat mode
The zone controller selects a damper mode based on zone
conditions and communications with the monitor thermo-
stat. The proper damper position is determined by the set-
tings of the Pressure Independent option (Pressure Depen-
dent Operation or Pressure Independent Operation).
During Pressure Independent Damper Modulation, the zone
controller damper is modulated to maintain a speci®c quan-
tity (cfm) of supply air.
Damper Interface ÐThe zone controller is interfaced
to the damper actuator through the wiring connector board.
The zone controller can be used to control one master damper
and up to 3 slave dampers. See Fig. 10. The zone controller
directly controls only the master damper. Slave dampers will
receive and follow damper position commands sent to the
master damper, but do not send information to the zone
controller.
Damper Modes ÐThe zone controller has 5 modes of
damper operation available: local mode, system mode, damper
ventilation mode, supplemental heat mode, and IAQ mode.
If the zone controller is a member of a zoning system, it
will have an associated system control (monitor thermostat)
that determines the heating/cooling equipment operation based
on zone demand.
When a system control has chosen a system mode, the
zone controller selects a damper mode based on the system
mode. If the associated system control has not chosen a sys-
tem mode, the zone controller selects a damper mode based
on the local mode.
ASSOCIATED CONTROL SYSTEM MODE Ð When cen-
tral system heating is needed, the system mode will beheating mode. When central system cooling is needed, the
system mode will be cooling mode.
If the zone controller zone has a heating demand and the
system is in heating mode, the zone damper is modulated in
the damper heating mode.
If the zone controller zone has a cooling demand and the
system is in cooling mode, the zone damper is modulated in
the damper cooling mode.
If the zone controller has no zone heating or cooling de-
mand, or if the zone controller zone demand is opposite of
the system mode, the zone controller will modulate the zone
damper in damper minimum air¯ow mode.
LOCAL MODE Ð When the system control has not
selected a system mode, the zone controller compares zone
temperature to supply-air temperature and determines the lo-
cal damper mode.
If the zone damper supply-air temperature is warmer than
the zone temperature and the zone controller is in heating
mode, then the zone damper is modulated in the damper heat-
ing mode.
If the zone damper supply air temperature is colder than
the zone temperature and the zone controller is in cooling
mode, then the zone damper is modulated in the damper cool-
ing mode.
If the zone controller has a zone heating or cooling de-
mand which is directly opposite of the local mode, the zone
controller will modulate the zone damper in the damper mini-
mum air¯ow mode.
If the zone controller has no zone heating or cooling de-
mand, the zone controller can modulate the zone damper in
the damper ventilation mode.
INDOOR AIR QUALITY (IAQ) MODE Ð When a local
sensor signals an alarm, the zone controller will check sys-
tem mode. If zone demand matches system mode, the zone
controller will participate in IAQ mode.
If the system mode is opposite of zone demand, the zone
controller will check its zone temperature, set points, and
reset temperature to determine if it will participate in IAQ
mode. If the zone temperature is outside the reset tempera-
ture range, the zone controller will look at duct temperature.
If the duct temperature will improve zone conditions, the zone
controller will participate in IAQ mode.
When in IAQ mode, the zone controller will position the
damper at the minimum position and send a signal to the
monitor thermostat to con®rm IAQ mode.
DAMPER VENTILATION AIRFLOW POSITION Ð The
Damper Ventilation Air¯ow Position is the position that the
damper will modulate to while in the ventilation mode. To
con®gure the option, set category 3, option 3. Use the set
point buttons to raise or lower the setting to the desired value.
The range of values is 0 to 7, where 0 is fully closed and 7
is half open. The default is 5. If the Damper Ventilation
Position is set to 0, or to a value equal or less than the
Minimum Damper Position, then ventilation mode is off. If
the Damper Ventilation Position is set to a value higher than
the Minimum Damper Position, then ventilation mode is on.
MAXIMUM DAMPER POSITION Ð The damper maxi-
mum position determines the maximum amount that the damper
will open or close during modulation. To con®gure the Maxi-
mum Damper Position option, set category 3, option 1. Use
the left set point buttons to raise or lower the Maximum Damper
Position setting. The range of values is 15 to 08, where 15
is fully open and 08 is half open. The default is 15.
MINIMUM DAMPER POSITION Ð The damper mini-
mum position determines the minimum amount that the damper
will open or close during modulation. To con®gure the Mini-
mum Damper Position option, set category 3, option 2. Use
Fig. 10 Ð Damper Wiring Connections
12 
						

							the left set point buttons to raise or lower the Minimum Damper
Position setting. The range of values is 0 to 7, where 0 is
fully closed and 7 is half open. The default is 5.
MINIMUM AIRFLOW SET POINT Ð The Minimum Air-
¯ow Set Point establishes the minimum supply air¯ow that
can be delivered to the zone controller zone during pressure
independent damper modulation. The air¯ow set point is shown
in cubic feet per minute.
To con®gure the Minimum Air¯ow Set Point option, set
category 3, option 7. The Minimum Air¯ow Set Point will
be shown. The range of values is 0 to 5000 cfm. Use the left
set point buttons to increase or decrease the Minimum Air-
¯ow Set Point. The default is 0.
MAXIMUM AIRFLOW SET POINT Ð The Maximum Air-
¯ow Set Point establishes the maximum supply air¯ow that
can be delivered to the zone controller zone during pressure
independent damper modulation. The air¯ow set point is shown
in cubic feet per minute.
To con®gure the Maximum Air¯ow Set Point option, set
category 3, option 8. The Maximum Air¯ow Set Point will
be shown. The range of values is 0 to 5000 cfm. Use the left
set point buttons to increase or decrease the Maximum Air-
¯ow Set Point. The default is 0.
DAMPER SIZE Ð The Damper Size option allows the zone
controller to be con®gured for the correct cross sectional area
(square inches) of the duct at the pressure sensor pickup (PSP)
location.
To con®gure the Damper Size option, set category 3,
option 9. Use the left set point buttons to toggle the display
until the correct damper size is shown. See Table 2 for a
description of damper sizes. The range of values is 0 to
1000 sq in. The default is 0.
Table 2 Ð Damper Sizes
ZONE DAMPER
MODEL NUMBERCROSS SECTIONAL
AREA (sq. in.)
ZD06 Carrier Round Zone Damper 28
ZD08 Carrier Round Zone Damper 50
ZD10 Carrier Round Zone Damper 78
ZD12 Carrier Round Zone Damper 112
ZD14 Carrier Round Zone Damper 153
ZD16 Carrier Round Zone Damper 200
RD8x10 Carrier Rectangular Damper 78
RD8x14 Carrier Rectangular Damper 110
RD8x18 Carrier Rectangular Damper 142
RD8x24 Carrier Rectangular Damper 190
NOTE: Cross sectional areas are calculated using inside diameters
assuming 0.03 in sheet metal thickness and rounded off to the near-
est whole square inch.
ZD/RD ACTUATOR Ð If the ZD/RD Actuator option is set
to ON, the zone controller is con®gured to operate a model
ZD/RD actuator. If the ZD/RD Actuator option is set to OFF,
the zone controller is con®gured to operate a high torque
actuator.
NOTE: The HTA-02 rotates through 60 degrees of travel.
The HTA-03 rotates through 90 degrees of travel. The HTA-02
and 03 are available as separate damper actuators and are
not factory-assembled to a damper.
To con®gure the ZD/RD Actuator option, set category 3,
option 5. Use the left set point buttons to toggle the setting
to ON or OFF. The default is ON.COUNTERCLOCKWISE OPEN DAMPER MODULA-
TION Ð If the Counterclockwise Open Damper Modula-
tion option is set to ON, the zone controller will modulate
the damper counterclockwise to move it into the open po-
sition. If the Counterclockwise Open Damper Modulation
option is set to OFF, the zone controller will modulate the
damper clockwise to move it into the open position.
To con®gure the Counterclockwise Open Damper Modu-
lation option, set category 3, option 6. Use the left set point
buttons to toggle the setting to ON or OFF. The default is
ON.
The following VAV (variable air volume) zone dampers
require counterclockwise rotation to modulate the damper to
an open position:
· Model ZD Zone Damper
· Model RD Rectangular Damper
· Model MA08 Actuator
Pressure Dependent Damper Modulation ÐThe
zone controller modulates the zone damper depending on zone
temperature, supply-air temperature, zone demand, and mode.
The zone damper may be modulated to one of 16 mechani-
cal positions. Position 0 is fully closed, position 15 is fully
open.
The zone controller modulates the zone damper to the
Damper Maximum Open Position when zone demand is greater
than 1.5É F or greater and the system mode matches zone
demand. The zone damper cannot open to a position greater
than the maximum damper position.
When zone demand is less than 1.5É F, the zone controller
modulates the zone damper to maintain a percentage pro-
portional to zone demand. The damper cannot close to a po-
sition less than the Minimum Damper Position. See Fig. 11
for an example of damper modulation.
To con®gure the zone controller for damper modulation
(Pressure Dependent Operation), set the Zone Pressure
Independent Operation option (category 3, option 4) to
OFF.
When the zone controller is chosen as the reference zone
by the associated system control (monitor thermostat), it modu-
lates the zone damper to the Damper Maximum Open
Position. The zone controller operates at the maximum
position until it is no longer the reference zone.
NOTE: Regardless of zone demand or Ventilation position
setting, the zone controller will not close the zone damper
beyond the Minimum Damper Position.
If the zone damper supply-air temperature is within the
temperature range of 65 to 80 F, and the Ventilation Position
is set higher than the Minimum Damper Position, the zone
controller modulates its zone damper to the Ventilation
Position.
If the zone damper supply-air temperature is not within
the temperature range of 65 to 80 F, the zone controller modu-
lates its zone damper to the Minimum Damper Position.
When the zone controller is in the damper minimum air-
¯ow mode, it modulates the zone damper to the Minimum
Damper Position.
Pressure Independent Damper Modulation
(33CSZC--PI Only) Ð
During pressure independent
damper modulation, the zone controller will modulate its zone
damper to maintain the air¯ow (cfm) set point. Air¯ow to
the zone is maintained between the Minimum Air¯ow Set
Point and the Maximum Air¯ow Set Point.
13 
						

							When zone demand is 1.5É F or greater, the zone con-
troller modulates the zone damper open, until air¯ow through
the damper equals the Air¯ow Set Point or until the Damper
Maximum Open Position is reached. When zone demand is
less than 1.5É F, the zone controller modulates the zone damper
to maintain a percentage of the Air¯ow Set Point propor-
tional to zone demand.
To con®gure the zone controller for pressure independent
damper modulation, set the Zone Pressure Independent
Operation option to ON. The Minimum and Maximum Air-
¯ow Set Points, Velocity Pressure Probe Gain, Pressure
Sensor Range, and the Damper Size must all be con®gured
correctly for independent pressure modulation.
When the zone controller is chosen as the reference zone
by the associated system control (monitor thermostat, sys-
tem controller, etc.), it modulates the zone damper open
until air¯ow through the damper equals the Air¯ow Set Point
or the Damper Maximum Open Position is reached. The zone
controller operates at the maximum air¯ow condition until it
is no longer the reference zone.
NOTE: When the Ventilation Position is set to 0 (ventilation
mode is off) and the zone controller is in occupied mode,
regardless of zone demand, the zone controller will not close
the zone damper beyond the Damper Minimum Air¯ow
Position.
PRESSURE INDEPENDENT DAMPER MODULATION
DURING DAMPER VENTILATION MODE Ð If the zone
damper supply-air temperature is within the temperature range
of 65 to 80 F, the zone controller modulates its zone damper
to maintain a percentage of the Air¯ow Set Point propor-
tional to the damper ventilation position.
If the zone damper supply-air temperature is not within
the temperature range of 65 to 80 F, the zone controller modu-
lates its zone damper to the minimum air¯ow set point.
When the zone controller is in the damper minimum air-
¯ow mode, the zone controller modulates the zone damper
to maintain a percentage of the Air¯ow Set Point propor-
tional to the damper minimum air¯ow position.
NOTE: During the ventilation mode, the zone controller will
not close the zone damper past the setting of the Damper
Minimum Air¯ow Position option.PRESSURE INDEPENDENT OPERATION Ð If the Pres-
sure Independent Operation option is set to ON, the zone
controller modulates its zone damper using pressure inde-
pendent damper modulation. If the Pressure Independent
Operation option is set to OFF, the zone controller modu-
lates its zone damper using pressure dependent damper
modulation.
To con®gure the Pressure Independent Operation option,
set category 3, option 4. Use the left set point buttons to
toggle the display ON or OFF. The default is OFF.
SUPPLEMENTAL HEAT
The operation of supplemental heat for each zone is con-
trolled by the zone controller. The zone controller works in
conjunction with the associated monitor thermostat to:
· lock out supplemental heat based on outside-air temperature
· utilize central heat and supplemental heat to satisfy zone
heating demands
When air¯ow into the zone is necessary during supple-
mental heat operation the monitor thermostat can be con-
®gured to energize the supply air fan. The zone controller
can be con®gured to open the zone damper and allow the
required amount of supply air into the zone.
The zone controller can be con®gured to control a variety
of supplemental heat sources:
· Fan Powered Mixing Box
· Perimeter Baseboard Heat
· Radiant Heating Panel
· Duct Mounted Heat
· Hydronic Heat
The zone controller can be con®gured to energize the
primary air fan in series fan powered mixing boxes con-
tinuously during occupied mode and to satisfy a zone heat-
ing or cooling demand during unoccupied mode. If the zone
controller is an IAQ participant and has an exhaust fan, the
zone controller cannot control supplemental heat damper
positioning.
Fig. 11 Ð Damper Modulation
14 
						

							Supplemental Heat Interface ÐThe zone supple-
mental heat source is interfaced to the zone controller through
a Heating Relay Pack. With the relay pack the zone con-
troller can control a fan and two stages of supplemental heat.
See Fig. 12.
For side pocket fan powered mixing boxes (parallel fan
box), the zone controller can control three stages of heat. At
1.5É F demand, the zone controller energizes the fan relay.
At 2.0É F demand the zone controller energizes the H1 heat
relay. At 2.5É F demand the zone controller energizes the H2
heat relay.
For series fan powered mixing boxes, the zone controller
can control the primary air fan and two stages of heat. The
fan relay (FAN) controls the mixing box primary air fan. The
®rst stage heat relay (H1) controls the mixing box ®rst stage
electric or hot water heat. The second stage heat relay (H2)
controls the mixing box second stage electric or hot water
heat.
Supplemental Heat Operation ÐThe zone con-
troller can use supplemental heat to satisfy the zone heating
demand when the Zone Supplemental Heat function is set to
ON.
The zone controller uses the Heating Relay Pack to:
· energize ®rst stage supplemental heat (H1) when zone heat-
ing demand is 1.5É F
· energize second stage supplemental heat (H2) when zone
heating demand is 2.0É F.
Once a stage of supplemental heat is energized, it remains
on until zone heating demand is 0.5É F or less.
NOTE: When equipped with a parallel fan box, there are
3 heating stages: energize fan when zone heating demand
is 1.0É F, energize ®rst stage of supplemental heat (H1)
when zone heating demand is 2.0É F, energize second stage
of supplemental heat (H2) when zone heating demand is
2.5É F.
NOTE: Supplemental Heat Operation can be disabled by the
monitor thermostat.
ZONE SUPPLEMENTAL HEAT Ð When the Zone Supple-
mental Heat option is set to ON, the zone controller can use
supplemental heat operation to satisfy zone heating demand.
When the Zone Supplemental Heat option is set to OFF, the
zone controller will not energize supplemental heat.
To con®gure the Zone Supplemental Heat option, set cat-
egory 6, option 1. Use the left set point buttons to toggle the
setting to ON or OFF. The default is OFF.SUPPLEMENTAL HEAT TIME GUARD Ð The zone con-
troller has a system time limit (Time Guard) which prevents
supplemental heat from being energized directly after supple-
mental heat has been deenergized, the zone controller re-
ceives power, or the zone controller resets.
The power-up or reset time guard determines how long
the zone controller will wait before starting the supplemen-
tal heat when the zone controller is powered up or reset. The
length of the time guard is 30 seconds plus 0 to 189 seconds
(determined by the ®rst 6 bits of the address of the zone con-
troller). This keeps the supplemental heating equipment from
starting simultaneously with other equipment which keeps
peak energy usage down. The system fan controlled by the
zone controller has a power-up or reset time guard of
30 seconds.
After the supplemental heat has been deenergized, the zone
controller will wait 30 seconds before allowing the system
fan to be energized, and 2 minutes before allowing the heat
relay to be energized.
SUPPLEMENTAL HEAT TIME GUARD OVERRIDE Ð
When the Supplemental Heat Time Guard Override option
is set to ON, the zone controller supplemental heat time guards
are reset to 30 seconds. If the time guard is less than
30 seconds, it is unaffected.
NOTE: When Supplemental Heat Time Guard Override is
set to ON, the zone controller resets it to OFF after the time
guards have been reset.
When the Supplemental Heat Time Guard Override op-
tion is set to OFF, the Supplemental Heat Time Guard de-
termines time guard length based on normal operation.
To con®gure the Supplemental Heat Time Guard Over-
ride option, set category 6, option 3. Use the left set point
buttons to turn the option ON or OFF. The default is OFF.
Supplemental Heating Damper Modulation Ð
Prior to energizing supplemental heat the zone controller will
modulate the Zone Damper to the Supplemental Heat Damper
Position.
When the zone controller monitor thermostat has selected
a system heating mode:
· if supplemental heat is energized, the zone controller modu-
lates the damper to the Damper Maximum Open Position
(or to the Air¯ow Set Point if the Zone Pressure Indepen-
dent Operation option is ON)
· if supplemental heat is deenergized, the zone controller modu-
lates the damper using Damper Modulation (pressure de-
pendent operation) or Pressure Independent Damper
modulation functions.
SUPPLEMENTAL HEAT DAMPER FACTOR Ð The Supple-
mental Heat Damper Factor option speci®es the damper po-
sition during supplemental heat damper modulation.
If the Pressure Independent Operation option is set to OFF,
the Supplemental Heat Damper Factor is a percentage of the
15 damper positions.
If the Pressure Independent Operation option is set to ON,
the Supplemental Heat Damper Factor is speci®ed as a per-
centage of the Air¯ow Set Point.
To con®gure the Supplemental Heat Damper Factor set-
ting, set category 6, option 2. The zone controller supple-
mental heat damper position will be displayed.
The position is shown in the top left corner. Use the left
set point buttons to raise or lower the position setting. The
range of values is 0 to 10, where 10 is the maximum damper
factor and 0 is the minimum damper factor. The default is 0.
Fig. 12 Ð Supplemental Heat Interface
15 
						

							As an example, if the Maximum Damper Position is set to
13 and the Minimum Damper Position is set to 5. Subtract
5 from 13 to get 8. Divide 8 by 10 to get 0.8. Supplemental
Heat Damper Factor 0 is 5 (Minimum Damper Position).
Use this formula is determine the Supplemental Heat Damp-
er Factors: Minimum Position + (((Maximum Position þ
Minimum Position)/10) * supplement heat damper posi-
tion). Factor 01 is 5 + (0.8 * 1) = 5 (all values are truncated).
Factor 02 is 5 + (0.8 * 2) = 6. Factor 10 will be 13 (Maxi-
mum Damper Position).
NOTE: If the Minimum or Maximum Damper Position op-
tions are changed, the Supplemental Heat Damper Factor will
be automatically recalculated.
FAN POWERED MIXING BOX Ð The zone controller will
operate a fan powered mixing box.
To con®gure the Fan Powered Mixing Box option, set cat-
egory 6, option 4. Use the left set point buttons to toggle the
display from 0 to 2. When the option is set to 0, the zone
controller will not use a fan powered mixing box. When the
option is set to 1, the zone controller will function with a
series fan powered mixing box. When the option is set to 2,
the zone controller will function with a parallel fan powered
mixing box. The default is 0.
If the Fan Powered Mixing Box option is set to 0, the zone
controller will not operate as a Fan Powered Mixing Box.
When the Fan Powered Mixing Box option is set to 1 (Se-
ries Fan Box), the zone controller will energize the fan relay
continuously during Occupied mode. The Heat1 relay en-
ergizes at 1.5É F demand. The Heat2 relay energizes at
2.0É F demand.
When the Fan Powered Mixing Box option is set to 2 (Par-
allel Fan Box), the zone controller will energize the fan re-
lay as ®rst stage heating when there is 1.5É F heating demand.
The Heat1 relay will energize for second stage heat when
there is a 2.0É F demand. The Heat2 relay will energize as
third stage when there is a 2.5É F demand.
NOTE: The zone controller will not deenergize the fan relay
until zone demand is less than 0.5É F.
HYDRONIC HEAT Ð When the zone controller is con®g-
ured for Hydronic Heat and the Fan Powered Mixing Box
option is set to 0, the zone controller assumes that hot water
is being used for supplemental heat. The Hydronic Heat
algorithm allows ®rst stage to be energized before the sys-
tem fan is requested in order to allow the heating coils to
attain proper temperature. This prevents cold air at the be-
ginning of a Supplemental Heat Operation from entering the
zone.
When the Hydronic Heat option is set to ON, the zone
controller will energize the supplemental heat stages accord-
ing to the Hydronic Heat staging algorithm, provided the
Fan Powered Mixing Box option is set to 0, the ``No Box
option.
When the Hydronic Heat option is set to OFF, the zone
controller will not energize the supplemental heat stages
according to the Hydronic Heat staging algorithm.
To con®gure the Hydronic Heat option, set category 6,
option 5. Use the left set point buttons to toggle the setting
to ON or OFF. The default is OFF.
SUPPLEMENTAL HEAT LOCKOUT OVERRIDE Ð The
zone controller can be con®gured to ignore a Supplemental
Heat Lockout command sent by the associated monitor
thermostat.
When the Supplemental Heat Lockout Override option is
set to ON the zone controller will ignore the Supplemental
Heat Lockout command sent by the associated System
Controller.When the Supplemental Heat Lockout Override option is
set to OFF, the zone controller will accept the Supplemental
Heat Lockout command sent by the System Controller.
To con®gure the Supplemental Heat Lockout option, set
category 6, option 6. Use the left set point buttons to toggle
the setting to ON or OFF. The default is OFF.
METERING
The zone controller has zone metering capabilities. The
zone controller can meter zone usage in three ways:
· usage of the zone in addition to the normal occupied sched-
ule (amount of time the zone is in Unoccupied Override).
· usage of the heating/cooling equipment to maintain zone
temperature conditions (amount of time the zone demand
matches the System Mode).
· usage of the supplemental heating equipment to maintain
zone temperature conditions during unoccupied override.
HVAC Usage Meter ÐThe zone controller has a
usage meter that can accumulate up to 32,767 minutes
(22.75 days) of zone usage. Through communication, the
amount of time accumulated in the meter can be accessed,
recorded, and reset to zero. Once the maximum amount of
time has been accumulated, the zone controller stops me-
tering and an HVAC Usage Meter Full Error is generated.
To reset the meter, force the value to zero through Carrier
Network Access Software.
To disable the zone controller HVAC Usage Meter, set the
HVAC Usage Meter option to OFF. No metering occurs. To
Enable the HVAC Usage Meter, set the option to ON. To
con®gure the HVAC usage meter option, set category 7, op-
tion 5. Use the left set point buttons to toggle the option ON
or OFF. The default is OFF.
Override Usage Meter ÐThe zone controller has an
override usage meter that can accumulate up to 32,767 min-
utes (22.75 days) of override usage. When the Override
Usage Meter option is set to ON, zone metering will occur
when the zone controller is in Unoccupied Override. When
the Override Usage Meter option is set to OFF, zone me-
tering for override usage will not occur. Once the maximum
amount of time has been accumulated, the zone controller
stops metering and an Override Usage Meter Full Error is
generated. To reset the meter, force the value to zero through
Carrier Network Access Software.
To con®gure the Override Usage Meter option, set cat-
egory 7, option 6. Use the left set point buttons to toggle the
setting to ON or OFF. The default is OFF.
Supplemental Heat Override Usage Meter ÐThe
zone controller has a supplemental heat override usage meter
that can accumulate up to 32,767 minutes (22.75 days) of
supplemental heat override usage. When the Supplemental
Heat Override Usage Meter option is set to ON, zone me-
tering occurs when the zone controller uses supplemental heat
during unoccupied override. When the Supplemental Heat
Override Usage Meter option is set to OFF, zone meter-
ing will not occur for supplemental heat usage in unoc-
cupied override. Once the maximum amount of time has
been accumulated, the zone controller stops metering and a
Supplemental Heat Override Usage Meter Full Error is
generated. To reset the meter, force the value to zero through
Carrier Network Access Software.
To con®gure the Supplemental Heat Override Usage Meter
option, set category 7, option 7. Use the left set point but-
tons to toggle the setting to ON or OFF. The default is OFF.
16 
						

							DIAGNOSTICS
The zone controller has diagnostic capabilities for com-
ponents, information, zone comfort, and usage.
Diagnostic problems, called errors or alarms, are divided
into 3 categories: Hardware Failure (HF) errors, Storage Fail-
ure (SF) errors, and System Errors (SE). The zone controller
tracks the operating conditions in the zone.
Error Code Display ÐAn error code representing the
SE, SF, and HF diagnostic functions can be displayed to in-
dicate which error has been declared. The 2 letters located in
the left of the display represent the type of error. The 3 num-
bers located in the right of the display identify the speci®c
error.
When the Error Code Display option is ON, an error
code will be displayed when the associated error occurs. Any
previous error codes that occurred when the Error Code Dis-
play was con®gured OFF will be displayed.
NOTE: When an error is cleared, any other errors remaining
in memory will be displayed, until all errors are cleared.
When the Error Code Display option is set to OFF, no
error codes will be displayed by the zone controller.
To con®gure the Error Code Display option, set category
7, option 1. Use the left set point buttons to toggle the set-
ting to ON or OFF. The default is OFF.
System Errors (SE) ÐSystem Errors occur when the
zone controller detects a zone operating problem or system
operating problem. See Table 3 for System Errors.
COMFORT TREND ERROR (Space Temperature Alarm)
(SE01) Ð A Comfort Trend error is a system error that pro-
vides information on the ability of the system to maintain
temperature conditions in its reference zone.
When the zone demand exceeds the Comfort Trend
Demand Set Point, the zone controller begins tracking the
Temperature Trend of the zone.
The zone controller declares a Comfort Trend Error for
the zone when the Temperature Trend is continuously zero
(zone temperature conditions are not improving) or positive
(zone temperature conditions are becoming worse) for the
entire Comfort Trend Time Limit.
To clear a Comfort Trend Error, use the Unit Reset func-
tion. The Unit Reset function is in category 7, option 8. The
default is OFF. Use the left set point buttons to set the option
to ON. The zone controller will reset all errors and return to
the OFF con®guration. The error can also be cleared by set-
ting the Comfort Trend Demand set point to 0.
By indicating when zone heating or cooling set points can-
not be satis®ed, a Comfort Trend Error helps identify zone
heating or cooling problems.
When the system is commissioned, this information can
be used by the installing contractor to recognize zone air-
¯ow or supply-air temperature problems in the system.During system operation, Comfort Trend Errors can be con-
tinuously monitored by the servicing contractor through a
local network access device to determine when system or
equipment problems are affecting zone comfort.
To troubleshoot a Comfort Trend Error:
1. Check the quantity of air¯ow into the zone controllers
zone.
a. Check the con®guration of the zone controller Damper
Maximum Open Position setting (category 3, option 1)
and the position of any balancing dampers used by the
zone. Dampers may need to be adjusted further open
to allow additional air¯ow into the zone. The allow-
able range for the Damper Maximum Open Position
setting is 15 to 8, with 15 being full open and 8 being
approximately 50% open.
b. Check the ductwork running to the zone controllers
zone. Loose connections, obstructions, or poorly in-
sulated duct can result in reduced air volume or tem-
peratures causing the zone not to satisfy within the
Comfort Trend Time Limit.
c. Check the bypass controller con®guration. If the by-
pass controller is not con®gured correctly, it can keep
the system static pressure too low to meet the zone
design load air¯ow requirements.
d. After the previous steps have been completed, the
performance of the supply air fan should be checked.
During full load situations, the fan must produce an
adequate quantity of supply air at the necessary static
pressure to meet the zone design requirements. Reset
the zone controller to clear error.
2. Check the temperature of supply air into the zone. If the
temperature is above the zone design conditions during
system cooling mode, or below design conditions during
system heating mode, the operation of the equipment should
be checked. Reset the zone controller to clear error.
Comfort Trend Demand Set Point Ð The Comfort Trend De-
mand Set Point establishes the minimum zone demand level
that must exist in the zone, before it can declare a Comfort
Trend Error.
The Comfort Trend Demand set point is con®gured in
category 7, option 3. Use the left set point buttons to raise
or lower the set point. The range of values is 0 to 25.5É F in
1/10É F increments. The default is 0É F. The function is dis-
abled if it is set to 0É F.
NOTE: The Comfort Trend Demand set point is always dis-
played in Fahrenheit, even if the Fahrenheit Display option
is set to OFF.
Comfort Trend Time Limit Ð The Comfort Trend Time Limit
establishes the continuous amount of time that must elapse
before the zone controller can declare a Comfort Trend
Error.
The Comfort Trend Time Limit set point is con®gured from
category 7, option 4. The range of values is 2 to 255 minutes
in 1-minute increments. The default is 2.
Table 3 ± System Errors
ERROR CODE SYSTEM ERROR DESCRIPTION ALARM PRIORITY LEVEL
SE01Comfort Trend (Space Temperature Alarm) 2
SE02HVAC Usage Meter Full 4
SE03Override Usage Meter Full 4
SE04Supplemental Heat Override Usage Meter Full 4
SE10IAQ Exceeded Limit 2
17 
						

							METER FULL ERROR (SE02,03,04) Ð System Errors SE02,
SE03, and SE04 indicate when a zone meter is full.
NOTE: During a meter full error, the full usage meter stops
recording and retains its maximum value until cleared.
To clear an SE02, SE03, or SE04 error, reset the full meter
to zero by using network access software. The meter can be
reset by forcing the value to zero through Carrier Network
Access Software.
IAQ EXCEEDED LIMIT ERROR (SE10) Ð When the CO
2level exceeds the preset level, the sensor signals the zone
controller. The zone controller will wait until the IAQ Alarm
Delay time (category 14, option 4) has expired, then it will
issue an SE10. The system (if con®gured) will bring in fresh
outdoor air to meet IAQ requirements. If the IAQ Alarm De-
lay is not set to give the system enough time to correct IAQ
problems, the SE10 will be issued every time the IAQ mode
is entered.
To clear a system error, set the IAQ Alarm Delay time
(category 14, option 4) to 0. When the error clears, reset the
time to the desired set point.
Storage Failure (SF) Errors ÐA Storage Failure
error is an indication that the zone controller has invalid
information. The zone controller stores its information in non-
volatile memory. If the zone controller determines that a piece
of stored information is incorrect, it generates a storage fail-
ure error.
When an SF Error occurs, the zone controller replaces the
invalid data in memory with factory selected default values
and the invalid information is not used by the associated sys-
tem control.
To clear an SF Error, enter correct data at the zone con-
troller. See Table 4 for a description of Storage Failure
Errors.
EXAMPLE OF CLEARING AN SF ERROR Ð The zone
controller displays a SF19 error. Look up SF19 in Table 4.
The affected con®guration is Maximum Damper Position.
The default value is 15. The desired setting is 12.
To clear the SF19 error manually, recon®gure the Maxi-
mum Damper Position option to 12. The SF19 error should
be cleared.
NOTE: If the SF error cannot be cleared, replace the zone
controller and con®gure the new thermostat to match de-
sired settings.
Table 4 Ð Storage Failure (SF) Errors
ERROR INFORMATION AFFECTEDDEFAULT
VALUE(S)
SF01 Occupied Cooling Set Point 72
SF02 Occupied Heating Set Point 68
SF03 Cooling Set Point Low Limit 68
SF04 Heating Set Point High Limit 75
SF05 Unoccupied Cooling Set Point 80
SF06 Unoccupied Heating Set Point 65
SF07 Rotating Display OFF
SF08 Fahrenheit Temperature Display ON
SF09 Occupancy Period 1MTWTHF
6:00AM-6:00PM
SF10 Occupancy Period 2MTWTHF
6:00AM-6:00PM
SF11 Occupancy Period 3MTWTHF
6:00AM-6:00PM
SF12 Occupancy Period 4MTWTHF
6:00AM-6:00PM
SF13 Occupancy Period 5MTWTHF
6:00AM-6:00PM
SF14 Occupancy Period 6MTWTHF
6:00AM-6:00PM
SF15 Occupancy Period 7MTWTHF
6:00AM-6:00PM
SF16 Occupancy Period 8MTWTHF
6:00AM-6:00PM
SF17 Schedule Number 0
SF18 Override Time Limit 1
SF19 Maximum Damper Position 15
SF20 Minimum Damper Position 0
SF21 Pressure Independent Operation OFF
SF22 Ventilation Position 5
SF23 ZD/RD Actuator ON
SF24 Counterclockwise Open ON
SF25 Maximum Air¯ow Set Point 0
SF26 Minimum Air¯ow Set Point 0
SF27 Damper Size 0
SF46Zone Temperature Sensor
CalibrationFactory Calibrated
SF47Remote Room Sensor
CalibrationFactory Calibrated
SF48Duct Temperature Sensor
CalibrationFactory CalibratedERROR INFORMATION AFFECTEDDEFAULT
VALUE(S)
SF49 Pressure Sensor Calibration Factory Calibrated
SF51 Room Sensor 1
SF59 Zone Supplemental Heat OFF
SF60Supplemental Heat Damper
Position0
SF61 Alarm System Name Network Con®gured
SF62 Fan Powered Mixing Box 0
SF63 Hydronic Heat OFF
SF64Supplemental Heat Lockout
OverrideOFF
SF65 Error Code Display OFF
SF67 Alternate Information OFF
SF68 Occupied Trend Demand 0
SF69 Occupied Trend Time Limit 2
SF70 HVAC Usage Meter Data OFF
SF71 Override Usage Meter Data OFF
SF72Supplemental Heat Override
Usage Meter DataOFF
SF75 Device Element Address 0
SF76 Security Level 1
SF77 Device Bus Number 0
SF82 Broadcast Acknowledge OFF
SF83 Global Schedule Broadcast OFF
SF85 Holiday Schedules 0
SF86 Equipment Priority 7
SF87Communication Failure Retry
Time10
SF88 Re-Alarm Time 30
SF89 IAQ System OFF
SF93 Local IAQ Sensor OFF
SF95IAQ Maximum Space
Temperature Reset0
SF98 Alarm Routing ControlNetwork Con®gured
(00000000)
SF100 HVAC Meter Enable ON
SF101 Override Meter Enable ON
SF103Supplemental Heat Override
Meter EnableON
18 
						

							Hardware Failure (HF) Errors ÐA Hardware Fail-
ure (HF) error is an error that corresponds to a hardware
failure at the zone controller, associated sensors, or zone damper.
To clear an HF Error, the component responsible for ini-
tiating the HF Error must be adjusted, repaired, or replaced.
See Table 5 for a description of HF errors.
Table 5 Ð Hardware Failure (HF) Errors
ERROR HARDWARE PROBLEMS PRIORITY LEVEL
HF01 Cannot Detect Closed Damper 2
HF02 Cannot Detect Open Damper 2
HF03 Zone Temperature Sensor
Out of Range2
HF04 Remote Room Sensor
Out of Range2
HF05 Duct Temperature Sensor
Out of Range2
HF06 Hardware NOVRAM Failure 2
HF07 Hardware Analog/Digital Failure 2
HF08 Pressure Sensor Out of Range 2
CANNOT DETECT CLOSED DAMPER Ð An HF01 error
is issued when the thermostat attempts to position the damper
closed, but the position sensor indicates the damper is not at
the fully closed position.
To clear the error, correct the damper problem and use the
Unit Reset function. The Unit Reset function is in category 7,
option 8. The default is OFF. Use the left set point buttons
to set the option to ON. The zone controller will reset all
errors.
To correct the damper problem:
1. Check the damper for mechanical binding. An obstruc-
tion in the damper or a bent damper blade can prohibit
the damper from modulating closed. Remove the source
of binding.
2. Check the actuator-to-damper alignment. If the damper
shaft is out of alignment with the actuator crank arm po-
sition, the damper may reach the fully closed position be-
fore the actuator.
Align the damper and the actuator so both fully closed
positions coincide. Prior to alignment, the Minimum Damper
Position (category 3, option 2) setting should be con®g-
ured to zero. This will ensure the actuator will be in the
fully closed position when the zone controller demand is
zero.
3. Check the damper actuator position to see if the traveler
arm has moved past the position sensor. If the traveler
arm is stuck at full open or full closed position, use the
following steps to correct the problem:
a. Disconnect the zone controller from the wiring con-
nector board.
b. At the damper, using a ¯at head screw driver, turn the
traveler screw (located on the stepper motor) until the
traveler arm is midway between the fully closed and
fully open positions.
c. Reconnect the zone controller.
4. Check for excessive inlet static pressure beyond the rated
ability of the damper actuator.
· ZD and RD zone dampers are rated for 18 in.-lb.
· The MA-08 actuator is rated for 18 in.-lb.
· The HTA-02 actuator is rated for 80 in.-lb.
· The HTA-03 actuator is rated for 45 in.-lb.
5. Check the con®guration of the zone controller Counter-
clockwise Open option (category 3, option 6). For
Carrier dampers, which the damper blade modulatescounterclockwise to open, the option should be con®g-
ured correctly.
6. Check the wiring between the damper actuator and zone
controller. If the green wire between the damper actuator
and the zone controller has lost continuity, the zone con-
troller will constantly receive the indication that the damper
is fully closed.
To check the wiring, disconnect the zone controller and
wiring connector board. Connect the zone controller and
wiring connector board directly at the damper board. If
the error disappears, the ®eld wiring or the connections
should be checked.
If the error is still present, the zone controller circuit board,
the wiring connector board, or the damper actuator cir-
cuit board is bad. To isolate the defective component, re-
place components, one at a time, until the error disappears.
CANNOT DETECT OPEN DAMPER Ð An HF02 error is
issued when the zone controller attempts to open the damper,
but the position sensor indicates the damper is fully closed.
To clear the error, correct the damper problem and use the
Unit Reset function. The Unit Reset function is in category 7,
option 8. The default is OFF. Use the left set point buttons
to set the option to ON. The zone controller will reset all
errors.
To correct the damper problem:
1. Check the damper for mechanical binding. An obstruc-
tion in the damper or a bent damper blade can prohibit
the damper from modulating open. Remove the source of
binding.
2. Check the damper actuator position to see if the traveler
arm has moved past the position sensor. If the traveler
arm is stuck at full open or full closed position, use the
following steps to correct the problem:
a. Disconnect the zone controller from the wiring con-
nector board.
b. At the damper, using a ¯at head screw driver, turn the
traveler screw (located on the stepper motor) until the
traveler arm is midway between the full closed and
full open positions.
c. Reconnect the zone controller.
3. Check for excessive inlet static pressure beyond the rated
ability of the damper actuator.
· ZD and RD zone dampers are rated for 18 in.-lb.
· The MA-08 actuator is rated for 18 in.-lb.
· The HTA-02 actuator is rated for 80 in.-lb.
· The HTA-03 actuator is rated for 45 in.-lb.
4. Check the wiring between the damper actuator and zone
controller. If the green wire between the damper actuator
and the zone controller has lost continuity, the zone con-
troller will constantly receive the indication that the damper
is fully closed.
To check the wiring, disconnect the zone controller and
wiring connector board. Connect the zone controller and
wiring connector board directly at the damper board. If
the error disappears, the ®eld wiring or the connections
should be checked.
If the error is still present, the zone controller circuit board,
the wiring connector board, or the damper actuator cir-
cuit board is bad. To isolate the defective component, re-
place components, one at a time, until the error disappears.
ZONE TEMPERATURE SENSOR OUT OF RANGE Ð An
HF03 error is issued when the zone temperature sensor is
reading below 30 F or greater than 180 F. The zone tem-
perature sensor can be recalibrated. The HF03 error will
automatically clear when the sensor reading is back within
the allowable range.
19 
						

							To check the zone temperature sensor:
1. Check that the zone temperature sensor is physically in-
tact on the zone controller printed circuit board. Ensure
the sensor is not shorted against the zone controller printed
circuit board.
2. a. Ensure the Room Sensor option (category 5, option 1)
has been con®gured correctly.
b. Check for other wiring running parallel to and less than
12 in. from the remote room sensor wiring. Avoid
running AC, control, or communication bus near the
remote room sensor wiring. Maintain a minimum sep-
aration of 12 in. or more between other wiring and
remote room sensor wiring.
3. Check the zone temperature sensor calibration. Calibrate
the sensor by manual calibration at the zone controller
using the Zone Temperature Sensor Calibration function
(category 5, option 2) and an accurate thermometer. Mea-
sure the temperature at the zone controller zone tempera-
ture sensor location using the accurate thermometer. Wait
for the reading to stabilize. Using the set point buttons,
increase or decrease the temperature display to match the
reading of the thermometer. If the zone temperature sen-
sor cannot be recalibrated, replace the zone controller.
REMOTE ROOM SENSOR OUT OF RANGE Ð An HF04
error is issued when the remote room temperature sensor is
reading below 30 F or greater than 180 F. The remote room
temperature sensor can be recalibrated. The HF04 error will
automatically clear when the sensor reading is back within
the allowable range.
To check the remote room sensor:
1. Check that the remote room sensor wiring and connec-
tions to the circuit board are physically intact. Ensure the
5-conductor control wiring running between the damper
actuator and the zone controller is not run near AC, con-
trol, or communication bus wiring. Maintain a minimum
separation of 12 in. or more between other wiring and
remote room sensor wiring. A resistor must be added in
parallel if using more than one remote room sensor.
2. Check for proper wiring connections (red to +, black
to þ). A 9.2 k ohm resistor must be added in parallel if
using more than one remote room sensor.
3. Verify that category 5, option 1, Room Sensor, is set
correctly.
4. Check the remote room sensor calibration. Calibrate the
sensor by manual calibration at the zone controller using
the Remote Room Sensor Calibration function (category
5, option 3) and an accurate thermometer. Measure the
temperature at the remote room temperature sensor
location using the accurate thermometer. Wait for the read-
ing to stabilize. Using the set point buttons, increase or
decrease the temperature display to match the reading of
the thermometer.
DUCT TEMPERATURE SENSOR OUT OF RANGE Ð An
HF05 error is issued when the duct temperature sensor is
reading below 30 F or greater than 180 F. The duct tem-
perature sensor can be recalibrated. The HF05 error will
automatically clear when the sensor reading is back within
the allowable range.
To check the duct temperature sensor:
1. Check that the duct temperature sensor wiring and con-
nections to the damper actuator circuit board are physi-
cally intact. Ensure the 5-conductor control wiring run-
ning between the damper actuator and the zone controller
is not run near AC, control, or communication bus wir-
ing. Maintain a minimum separation of 12 in. or more
between other wiring.2. Check the duct temperature sensor calibration. Calibrate
the sensor by manual calibration at the zone controller
using the Duct Temperature Sensor Calibration function
(category 5, option 4) and an accurate thermometer. Mea-
sure the temperature at the duct temperature sensor
location using the accurate thermometer. Wait for the read-
ing to stabilize. Using the set point buttons, increase or
decrease the temperature display to match the reading of
the thermometer. If the duct temperature cannot be re-
calibrated, replace the damper board or duct sensor.
3. Check the wiring between the damper actuator and the
zone controller. If the green wire between the damper
actuator and the zone controller has lost continuity, the
zone controller will not function properly.
HARDWARE NOVRAM FAILURE Ð An HF06 error is
issued when the zone controller detects a problem in its non-
volatile memory. If the zone controller is able to correct the
problem, the error will clear in approximately 10 minutes. If
the condition persists, the zone controller must be replaced.
HARDWARE A/D FAILURE Ð An HF07 error is issued
when the zone controller detects a problem with its analog/
digital converter circuitry. If the zone controller is able to
correct the problem, the error will clear in approximately
10 minutes. If the condition persists, the zone controller must
be replaced.
PRESSURE SENSOR OUT OF RANGE Ð An HF08
error is issued when the pressure sensor is reading below
0.00 in. wg or greater than 5.0 in. wg. The pressure sensor
can be recalibrated. The HF08 error will automatically clear
when the sensor reading is back within the allowable range.
To clear the HF08 error:
1. Check for excessive static pressure or excessive differ-
ential pressure at the pressure sensor pressure pickup. The
33CSPS-01 is rated for a maximum of 0.5 in. wg. The
33CSPS-02 is rated for a maximum of 2.0 in. wg. When
the pressure sensor is operating at or above the rated pres-
sure, the sensor readings will be unstable, causing an HF08
error.
2. Check the connection of hoses running from the PSP pres-
sure pickup and the pressure sensor. Incorrect or faulty
connections with the PSP pressure pickup can result in an
HF08 error.
3. Check to ensure the pressure sensor wiring connection to
the damper actuator is complete and well connected. En-
sure the connections labeled ``O on the pressure sensor
wiring harness are not used or shorted to ground. For the
zone controller, the two wires marked ``O on the pres-
sure sensor wiring harness are not used and can be clipped
to prevent possible connection to ground.
4. Check the wiring from the pressure sensor to the damper
actuator printed circuit board. If improperly wired the zone
controller will be unable to communicate with the pres-
sure sensor. This will result in an HF08 error. To check
the wiring:
a. Remove the pressure sensor from location and wire it
directly to the factory supplied six-wire harness. The
harness should be connected to the damper actuator
printed circuit board.
b. If the HF08 error disappears, then the ®eld-wiring or
connections should be checked.
c. If the HF08 error still appears, the damper circuit board
or the pressure sensor may have failed.
d. To determine the defective component, replace the com-
ponents one at a time until the problem is isolated.
20