92
T221 (Outdoor Air Quality Sensor Failure) — The indoor air
quality sensor (
Inputs
→
AIR.Q
→
OAQ
) fails if the signal from
the 4 to 20 mA sensor is below 2 mA. If the outdoor air quality
sensor fails, OAQ defaults to 400 ppm and demand control
ventilation will continue. Recovery is automatic. Reason for
error is either a faulty sensor, wiring error, or damaged input on
the CEM control board.
T229 (Economizer Minimum Position Override Input Fail-
ure)
—
If the unit is configured to use the remote position
override for the economizer and the input Econo Min. Pos.
Override (
Configuration
→
IAQ
→
AQ.SP
→
IQ.O.P
) input 4 to
20 mA reading is less than 2 mA then an alert will occur and
the default software minimum position will be used for the
economizer. The alert will automatically reset.
T300 (Space Temperature Below Limit) — If the space tem-
perature is below the configurable SPT Low Alert
Limits (occupied [
Configuration
→
ALLM
→
SP.L.O
] for
5 minutes or unoccupied [
Configuration
→
ALLM
→
SP.L.U
]
for 10 minutes), then an alert will be broadcast. The alert will
automatically reset.
T301 (Space Temperature Above Limit) — If the space tem-
perature is above the configurable SPT High Alert
Limits (occupied [
Configuration
→
ALLM
→
SP.H.O
] for
5 minutes or unoccupied [
Configuration
→
ALLM
→
SP.H.U
]
for 10 minutes), then an alert will be broadcast. The alert will
automatically reset.
T302 (Supply Temperature Below Limit) — If the supply-air
temperature measured by the supply temperature sensor is
below the configurable SAT LO Alert Limit/Occ (
Configura-
tion
→
ALLM
→
SA.L.O
) for 5 minutes or the Low Supply air
temperature alert limit unoccupied mode (
Configuration-
→
ALLM
→
SA.L.U
) for 10 minutes, then an alert will be
broadcast.
T303 (Supply Temperature Above Limit) — If the supply
temperature is above the configurable SAT HI Alert Limit Occ
(
Configuration
→
ALLM
→
SAH.O
) for 5 minutes or the SAT
HI Alert Limit/Unocc (
Configuration
→
ALLM
→
SA.H.
U
) for
10 minutes, then an alert will be broadcast. The alert will
automatically reset.
T304 (Return Air Temperature Below Limit) — If the return-
air temperature measured by the RAT sensor is below the
configurable RAT LO Alert Limit/Occ (
Configuration
→
ALLM
→
RA.L.O
) for 5 minutes or RAT HI Alert Limit/Occ
(
Configuration
→
ALLM
→
RA.L.U
) for 10 minutes, then an
alert will be broadcast.
T305 (Return Air Temperature Above Limit) — If the return-
air temperature is below the RAT HI Alert Limit/Occ (
Config-
uration
→
ALLM
→
RA.H.O
) for 5 minutes or RAT HI
Alert Limit/Occ (
Configuration
→
ALLM
→
RA.H.U
) for
10 minutes, then an alert will be broadcast. The alert will
automatically reset.
T308 (Return Air Relative Humidity Below Limit) — If the
unit is configured to use a return air relative humidity sensor
through the Return Air RH Sensor (
Configuration
→
UNIT
→
SENS
→
RRH.S
) setting, and the measured level is
below the configurable RH Low Alert Limit (
Configuration
→
ALLM
→
R.RH.L
) for 5 minutes, then the alert will occur.
The unit will continue to run and the alert will automatically
reset.
T309 (Return Air Relative Humidity Above Limit) — If the
unit is configured to use a return air relative humidity sensor
through the Return Air RH Sensor (
Configuration
→
UNIT
→
SENS
→
RRH.S
) setting, and the measured level is
above the configurable RH High Alert Limit (
Configuration
→
ALLM
→
R.RH.H
) for 5 minutes, then the alert will occur.
Unit will continue to run and the alert will automatically reset.
T310 (Supply Duct Static Pressure Below Limit) — If the unit
is a VAV unit with a supply duct pressure sensor and the
measured supply duct static pressure (
Pressures
→
AIR.P
→
SP
) is below the configurable SP Low Alert Limit
(
Configuration
→
ALLM
→
SP.L
) for 5 minutes, then the alert
will occur. The unit will continue to run and the alert will auto-
matically reset.
T311 (Supply Duct Static Pressure Above Limit) —
If the unit
is a VAV unit with a supply duct pressure sensor and the
measured supply duct static pressure (
Pressures
→
AIR.P
→
SP
) is above the configurable SP Low Alert Limit
(
Configuration
→
ALLM
→
SP.H
) for 5 minutes, then the alert
will occur. The unit will continue to run and the alert will auto-
matically reset.
T312 (Building Static Pressure Below Limit) — 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 (
Configuration
→
ALLM
→
BP.L
). If the measured pres-
sure (
Pressures
→
AIR.P
→
BP
) is below the limit for 5 minutes
then the alert will occur.
T313 (Building Static Pressure Above Limit) — 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 (
Configuration
→
ALLM
→
BP.H
). If the measured
pressure (
Pressures
→
AIR.P
→
BP
) is above the limit for
5 minutes, then the alert will occur.
T314 (IAQ Above Limit) — If the unit is configured to use an
CO
2
sensor and the level (
Inputs
→
AIR.Q
→
IAQ
) is above the
configurable IAQ High Alert Limit (
Configuration
→
ALLM
→
IAQ.H
) for 5 minutes then the alert will occur. The
unit will continue to run and the alert will automatically reset.
A404 (Fire Shutdown Emergency Mode) — This alarm occurs
when the fire shutdown input is active (either open or closed
depending upon its configuration). If the fire shut down input is
energized (fire shutdown is in effect), or if two fire smoke
modes are incorrectly energized at the same time, a fire shut-
down mode will occur. This is an emergency mode requiring
the complete shutdown of the unit. Recovery is automatic
when the inputs are no longer on.
This alarm is usually caused by an auxiliary device that is
trying to shut down the unit (e.g., smoke detector). The input
for Fire Shutdown is at
Inputs
→
FIRE
→
FSD
. The switch
logic configuration for this switch input can be found at
variable
Configuration
→
SW.LG
→
FSD.L
. Verify that the
configuration is set correctly, verify the wiring and auxiliary
device. This alarm resets automatically.
A405 (Evacuation Emergency Mode)
—
Unit has been placed
in the fire evacuation mode by means of the external command
for evacuation (
Inputs
→
FIRE
→
EVAC
).
If the evacuation input on the CEM is energized, an evacua-
tion mode occurs which flags an alarm. This mode attempts to
lower the pressure of the space to prevent smoke from moving
into another space. This is the reverse of the Pressurization
mode. Closing the economizer, opening the return air damper,
turning on the power exhaust, and shutting down the indoor fan
will decrease pressure in the space. Recovery is automatic
when the input is no longer on.
A406 (Pressurization Emergency Mode)
—
Unit has been
placed in the fire pressurization mode by means of the External
command for pressurization (
Inputs
→
FIRE
→
PRES
).
If the pressurization input on the CEM is energized, a pres-
surization mode occurs which flags an alarm. This mode
attempts to raise the pressure of a space to prevent smoke
infiltration from another space. The space with smoke should
be in an Evacuation mode attempting to lower its pressure.
Opening the economizer, closing the return air damper, shut-
ting down power exhaust, and turning the indoor fan on will
increase pressure in the space. Recovery is automatic when the
input is no longer on.
Содержание WEATHERMAKER 48AJ020
Страница 95: ...95 Fig 13 Typical Main Control Box Wiring Schematic A48 7787 ...
Страница 96: ...96 TO NEXT PAGE Fig 14 Auxiliary Control Box Wiring Schematic A48 7294 ...
Страница 97: ...97 LEN PORT FOR USE WITH NAVIGATOR Fig 14 Auxiliary Control Box Wiring Schematic cont A48 7809 ...
Страница 98: ...98 Fig 15 Typical 2 Stage Gas Heat Wiring Schematic Size 051 and 060 Units Shown A48 6866 ...
Страница 99: ...99 TO NEXT PAGE Fig 16 Typical Staged Gas Heat Wiring Schematic Size 051 and 060 Units Shown A48 7296 ...
Страница 100: ...100 FROM PREVIOUS PAGE Fig 16 Typical Staged Gas Heat Wiring Schematic Size 051 and 060 Units Shown cont A48 7297 ...
Страница 101: ...101 Fig 17 Typical Electric Heat Control Schematic 50AJ AK AW AY Size 051 and 060 Units Shown A48 6689 ...
Страница 102: ...102 TO NEXT PAGE Fig 18 Typical Power Schematic Size 051 and 060 Units Shown A48 7298 ...
Страница 103: ...103 FROM PREVIOUS PAGE Fig 18 Typical Power Schematic Size 051 and 060 Units Shown cont A48 7299 ...
Страница 104: ...104 Fig 19 Controls Option Wiring Schematic A48 7810 ...
Страница 105: ...105 Fig 20 Small Chassis Component Location Size 020 035 Units A48 7301 ...
Страница 106: ...106 Fig 21 Large Chassis Component Locations Size 036 060 Units A48 7302 ...