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ITEM
SP.L.O
SPT lo alert limit/occ
SP.H.O
SPT hi alert limit/occ
SP.L.U
SPT lo alert limit/unocc
SP.H.U
SPT hi alert limit/unocc
SA.L.O
EDT lo alert limit/occ
SA.H.O
EDT hi alert limit/occ
SA.L.U
EDT lo alert limit/unocc
SA.H.U
EDT hi alert limit/unocc
RA.L.O
RAT lo alert limit/occ
RA.H.O
RAT hi alert limit/occ
RA.L.U
RAT lo alert limit/unocc
RA.H.U
RAT hi alert limit/unocc
OAT.L
OAT lo alert limit
OAT.H
OAT hi alert limit
R.RH.L
RARH low alert limit
R.RH.H
RARH high alert limit
O.RH.L
OARH low alert limit
O.RH.H
OARH high alert limit
SP.L
SP low alert limit
SP.H
SP high alert limit
BP.L
BP lo alert limit
BP.H
BP high alert limit
IAQ.H
IAQ high alert limit
OARH High Alert Limit (O.RH.H)
If the unit is configured to use a return air relative humidity sensor
(Configuration
ECON
ORH.S) and the measured level is
above the configurable OARH High Alert Limit (O.RH.H), then
economizer operation will be disabled. The unit will continue to
run and the alert will automatically reset.
Supply Duct Pressure Low Alert Limit (SP.L)
If the unit is a VAV unit with a supply duct pressure sensor and
the measured supply duct static pressure is below the configu-
rable SP Low Alert Limit (SP.L), then Alert 310 will occur. The
unit will continue to run and the alert will automatically reset.
Supply Duct Pressure High Alert Limit (SP.H)
If the unit is a VAV unit with a supply duct pressure sensor and
the measured supply duct static pressure is above the configu-
rable SP High Alert Limit (SP.H), then Alert 311 will occur. The
unit will continue to run and the alert will automatically reset.
Building Pressure Low Alert Limit (BP.L)
If the unit is configured to use modulating power exhaust, then a
building static pressure limit can be configured using the BP Low
Alert Limit (BP.L). If the measured pressure is below the limit
then Alert 312 will occur.
Building Pressure High Alert Limit (BP.H)
If the unit is configured to use modulating power exhaust, then a
building static pressure limit can be configured using the BP Hi
Alert Limit (BP.H). If the measured pressure is above the limit,
then Alert 313 will occur.
Indoor Air Quality High Alert Limit (IAQ.H)
If the unit is configured to use a CO
the configurable IAQ High Alert Limit (IAQ.H), then the alert
will occur. The unit will continue to run and the alert will automat-
ically reset.
Sensor Trim Configuration
The TRIM submenu is used to calibrate the sensor trim settings.
The trim settings are used when the actual measured reading does
not match the sensor output. The sensor can be adjusted to match
the actual measured reading with the trim function. A list is shown
in Table 77.
Table 76 — Alert Limit Configuration
EXPANSION
sensor and the level is above
2
RANGE
UNITS
–10 to 245
dF
–10 to 245
dF
–10 to 245
dF
–10 to 245
dF
–40 to 245
dF
–40 to 245
dF
–40 to 245
dF
–40 to 245
dF
–40 to 245
dF
–40 to 245
dF
–40 to 245
dF
–40 to 245
dF
–40 to 245
dF
–40 to 245
dF
0 to 100
%
0 to 100
%
0 to 100
%
0 to 100
%
0 to 5
"H2O
0 to 5
"H2O
–0.25 to 0.25
"H2O
–0.25 to 0.25
"H2O
0 to 5000
IMPORTANT: Sensor trim must not be used to extend unit oper-
ation past the allowable operating range. Doing so may impair or
negatively affect the Carrier product warranty.
Air Temperature Leaving Supply Fan Sensor (SAT.T)
This variable is used to adjust the supply fan temperature sensor
reading. The sensor reading can be adjusted ±10°F to match the
actual measured temperature.
Return Air Temperature Sensor Trim (RAT.T)
This variable is used to adjust the return air temperature sensor
reading. The sensor reading can be adjusted ± 10°F to match the
actual measured temperature.
Outdoor Air Temperature Sensor Trim (OAT.T)
This variable is used to adjust the outdoor air temperature sensor
reading. The sensor reading can be adjusted ± 10°F to match the
actual measured temperature.
Space Temperature Sensor Trim (SPT.T)
This variable is used to adjust the space temperature sensor read-
ing. The sensor reading can be adjusted ± 10°F to match the actual
measured temperature.
Limit Switch Trim (L.SW.T)
This variable is used to adjust the limit switch temperature sensor
reading. The sensor reading can be adjusted ±10°F to match the
actual measured temperature.
Air Temperature Leaving Evaporator Trim (CCT.T)
This variable is used to adjust the leaving evaporator temperature
sensor reading. The sensor reading can be adjusted ± 10°F to
match the actual measured temperature.
A1 Discharge Temperature (DTA.1)
This variable is used to adjust the A1 compressor discharge tem-
perature sensor reading. The sensor reading can be adjusted ±10°F
to match the actual measured temperature.
NOTE: Due to the resolution of the control board analog input,
temperature readings less than 50°F will become increasingly in-
accurate as the temperature decreases.
Suction Pressure Circuit A Trim (SP.A.T)
This variable is used to adjust the suction pressure sensor reading
for circuit A. The sensor reading can be adjusted ±50 psig to
match the actual measured pressure.
99
CCN POINT
DEFAULT
SPLO
60
SPHO
85
SPLU
45
SPHU
100
SALO
40
SAHO
100
SALU
40
SAHU
100
RALO
60
RAHO
90
RALU
40
RAHU
100
OATL
–40
OATH
150
RRHL
0
RRHH
100
ORHL
0
ORHH
100
SPL
0
SPH
2
BPL
–0.25
BPH
0.25
IAQH
1200
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Table of Contents
Troubleshooting
