124
SENS
RRH.S) setting, and the measured level is below the
configurable RH Low Alert Limit (Configuration
IAQ
ALLM
R.RH.L) for 5 minutes, then the alert will oc-
cur. The unit will continue to run and the alert will automatical-
ly 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
IAQ
ALLM
R.RH.H) for 5 minutes, then the alert will oc-
cur. 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 (Pressures
AIR.P
SP) is below
the configurable SP Low Alert Limit (Configura-
tion
IAQ
ALLM
SP.L) for 5 minutes, then the alert will
occur. The unit will continue to run and the alert will automati-
cally 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 (Pressures
AIR.P
SP) is above
the configurable SP Low Alert Limit (Configura-
tion
IAQ
ALLM
SP.H) for 5 minutes, then the alert will oc-
cur. 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 (Configuration
IAQ
ALLM
BP.L). If
the measured pressure (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
IAQ
ALLM
BP.H). If the
measured pressure (Pressures
AIR.P
BP) is above the lim-
it 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 (Inputs
AIR.Q
IAQ) is above the
configurable IAQ High Alert Limit (Configuration
IAQ
ALLM
IAQ.H) for 5 minutes then the alert will oc-
cur. The unit will continue to run and the alert will automatical-
ly reset.
T316 (OAT Below Limit
) — If the outside-air temperature
measured by the OAT thermistor (Temperatures
AIR.T
OAT) is below the configurable OAT Low Alert Limit (Con-
figuration
IAQ
ALLM
OAT.L) for 5 minutes then the
alert will be broadcast.
T317 (OAT Above Limit
— If the outside-air temperature
measured by the OAT thermistor (Temperatures
AIR.T
OAT) is above the configurable OAT High Alert Limit
(Configuration
IAQ
ALLM
OAT.H) for 5 minutes then
the alert will be broadcast.
T318 (SP Not Holding Setpoint)
— If the static pressure (
Pres-
sures
AIR.P
SP
) is outside the range
Configura-
tion
SP
SP.SP
±
Configuration
IAQ
PROG
PG.SP
this
alert will be logged. Recovery is automatic. The reason for the alert
is that the static pressure set point is not being held by the supply.
T319 (BP Not Holding Setpoint) — If the building pressure
(Pressures
AIR.P
BP) is outside the range Configura-
tion
BP
BP.SP ± Configuration
IAQ
PROG
PG.BP this alert will be logged. Recovery is automatic. The
reason for the alert is that the building pressure set point is
not being held by the power exhaust fan.
T320 (DELTACFM Not Holding Setpoint)
— If the delta
cfm (Inputs
CFM
S.CFM - Inputs
CFM
R.CFM) is
outside the range Inputs
CFM
D.CFM ±
Configuration
IAQ
PROG
PG.DC this alert will be
logged. Recovery is automatic. The reason for the alert is that
the delta cfm is not being held by the return.
T321 (SH_A1 Not Holding Setpoint)
T322 (SH_A2 Not Holding Setpoint) — If the circuit A su-
perheat (Temperatures
REF.T
SH_A1, SH_A2) is outside
the range Run Status
EXVS
CTRL
C.SHS ± Configura-
tion
IAQ
PROG
PG.SH this alert will be logged. Recov-
ery is automatic. The reason for this alert is that the superheat
set point is not being held by EXV.
T323 (SH_B1 Not Holding Setpoint)
T324 (SH_B2 Not Holding Setpoint) — If the circuit B super-
heat (Temperatures
REF.T
SH.B1, SH.B2) is outside the
range Run Status
EXVS
CTRL
C.SHS ± Configura-
tion
IAQ
PROG
PG.SH this alert will be logged. Recov-
ery is automatic. The reason for this alert is that the superheat
set point is not being held by EXV.
T325 (Circuit A High Pressure Drop Detected –
Check Filter Drier)
T326 (Circuit B High Pressure Drop Detected –
Check Filter Drier) — Alert codes 325 and 326 are for circuits
A and B respectively. If the pressure difference DP.A-LP.A (or
DP.B-LP.B) on the corresponding circuit is outside of ± Con-
figuration
IAQ
PROG
PG.FD this alert will be logged.
Recovery is automatic. This alert is an indication the filter drier
may be dirty and need to be changed.
T327 (Heat Not Holding Setpoint)
— If the leaving air tem-
perature (Tempe ratures
AIR.T
S.G.LS) is outside the range
Run Status
VIEW
HT.C.P ± Configuration
IAQ
PROG
PG.MH this alert will be logged. Recovery is auto-
matic. The reason for the alert is that the heat control point is
not being held.
T329 (Possible MLV/HGBP Failure Detected)
— If the cir-
cuit A discharge pressure (Pressures
REF.P
DP.A) is not
reduced by Configuration
IAQ
PROG
PG.ML this alert
will be logged. Recovery is automatic. The reason for the alert
is that the MLV/HGBP may not be functioning properly.
T335 (Excess Outdoor Air)
— When the control detects a
stuck or jammed actuator, it shall compare the stuck position to
the command position to log additional alerts. If the stuck po-
sition > commanded position, the alert is set.
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 ef-
fect), 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 in-
put 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.
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)
— If the pressuriza-
tion input on the CEM is energized, a pressurization 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, clos-
ing the return-air damper, shutting down power exhaust, and
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