Controls, Start-Up, Operation, Service and ... - Climayoreo

position. Recovery is automatic. Reason for error is either a
faulty sensor, wiring error, or damaged input on the MBB control
board.
T221 (Outdoor Air Quality Sensor Failure) — If the outdoor
air quality sensor (InputsAIR.QOAQ) 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 Min Pos Override Input Failure) — If
the economizer minimum position override input fails, the
economizer will operate as if it were not configured for
override. Recovery is automatic. Reason for error is either a
faulty sensor, wiring error, or damaged input on the MBB control
board. This error only occurs when the unit is configured
for minimum position override and a 4 to 20 mA signal is not
present.
T245 (Outside Air Cfm Sensor Failure) — If the outside air cfm
sensor (InputsCFMO.CFM) fails, the economizer will default
to discrete positioning of the economizer (Configuration
IAQDCV.CIAQ.M, ConfigurationEconEC.MN).
Recovery is automatic. Reason for error is either a faulty sensor,
wiring error, or damaged input on the CEM control board.
T246 (Supply Air Cfm Sensor Failure) — If the supply air
cfm sensor (InputsCFMS.CFM) fails, fan tracking is not
possible and the system will shut down. Recovery is automatic.
Reason for error is either a faulty sensor, wiring error, or damaged
input on the EXB control board.
T247 (Return Air Cfm Sensor Failure) — If the return air
cfm sensor (InputsCFMR.CFM) fails, fan tracking is not
possible and the system will shut down. Recovery is automatic.
Reason for error is either a faulty sensor, wiring error, or damaged
input on the EXB control board.
T300 (Space Temperature Below Limit) — If the space temperature
is below the configurable SPT Low Alert Limits (occupied
[ConfigurationALLMSP.L.O] for 5 minutes or
unoccupied [ConfigurationALLMSP.L.U] for 10 minutes),
then an alert will be broadcast. The alert will automatically
reset.
T301 (Space Temperature Above Limit) — If the space temperature
is above the configurable SPT High Alert Limits
(occupied [ConfigurationALLMSP.H.O] for 5 minutes or
unoccupied [ConfigurationALLMSP.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 (Configuration
ALLMSA.L.O) for 5 minutes or the Low Supply air temperature
alert limit unoccupied mode (ConfigurationALLM
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
(ConfigurationALLMSAH.O) for 5 minutes or the SAT
HI Alert Limit/Unocc (ConfigurationALLMSA.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
ALLMRA.L.O) for 5 minutes or RAT HI Alert Limit/Occ
(ConfigurationALLMRA.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 (ConfigurationALLMRA.H.O)
for 5 minutes or RAT HI Alert
Limit/Occ (ConfigurationALLMRA.H.U) for 10 minutes,
then an alert will be broadcast. The alert will automatically reset.
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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 (ConfigurationUNIT
SENSRRH.S) setting, and the measured level is below the
configurable RH Low Alert Limit (ConfigurationALLM
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 (ConfigurationUNIT
SENSRRH.S) setting, and the measured level is above the
configurable RH High Alert Limit (ConfigurationALLM
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 Pressure Below Limit) — If the unit is a
VAV unit with a supply duct pressure sensor and the measured
supply duct static pressure (PressuresAIR.PSP) is below
the configurable SP Low Alert Limit (ConfigurationALLM
SP.L) for 5 minutes, then the alert will occur. The unit will
continue to run and the alert will automatically reset.
T311 (Supply Duct Pressure Above Limit) — If the unit is a
VAV unit with a supply duct pressure sensor and the measured
supply duct static pressure (PressuresAIR.PSP) is above
the configurable SP Low Alert Limit (ConfigurationALLM
SP.H) for 5 minutes, then the alert will occur. The unit will
continue to run and the alert will automatically 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 (ConfigurationALLMBP.L). If the measured
pressure (PressuresAIR.PBP) 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 (ConfigurationALLMBP.H). If the measured
pressure (PressuresAIR.PBP) is above the limit for
5 minutes, then the alert will occur.
T314 (IAQ Above Limit) — If the unit is configured to use a
CO 2 sensor and the level (InputsAIR.QIAQ) is above the
configurable IAQ High Alert Limit (ConfigurationALLM
IAQ.H) for 5 minutes then the alert will occur. The unit will
continue to run and the alert will automatically reset.
T316 (OAT Below Limit) — If the outside-air temperature
measured by the OAT thermistor (TemperaturesAIR.T
OAT) is below the configurable OAT Low Alert Limit (ConfigurationALLMOAT.L)
for 5 minutes then the alert will
be broadcast.
T317 (OAT Above Limit — If the outside-air temperature
measured by the OAT thermistor (TemperaturesAIR.T
OAT) is above the configurable OAT High Alert Limit
(ConfigurationALLMOAT.H) for 5 minutes then the alert
will be broadcast.
A400 (Hydronic Freezestat Trip) — If the freezestat for the
hydronic coil trips, the unit goes into emergency mode and
does not allow cooling or heating. The economizer goes to 0%
open. Supply fan operation is enabled. Recovery is automatic
when the switch goes off.
A404 (Fire Shut Down Emergency Mode [fire-smoke]) —
If the fire shutdown input is energized (fire shutdown is in effect),
or if two fire smoke modes are incorrectly energized at
the same time, a Fire Shutdown 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.
A405 (Evacuation Emergency Mode) — If the evacuation input
on the CEM is energized, an evacuation mode occurs
which flags an alarm. This mode attempts to lower the pressure
of the space to prevent smoke from moving into another space.