30
SPACE RELATIVE HUMIDITY SENSOR
This alarm indicates the mA input at the associated channel
falls below 3.5 mA or rises above 21 mA, or the Network value
for space RH is no longer being received. Cooling, heating,
and supply fan operation continues, however, the controller's
Humidi-MiZer
®
binary output is disabled until the fault condi-
tion is corrected.
IAQ SENSOR
This alarm indicates the mA input at the associated channel falls
below 3.5 mA or rises above 21 mA, or the Network value for
space RH is no longer being received. Cooling, heating, and sup-
ply fan operation continues. However, the controller's IAQ control
function is disabled until the fault condition is corrected.
OAQ SENSOR
This alarm indicates the mA input at the associated channel
falls below 3.5 mA or rises above 21 mA, or the Network value
for space RH is no longer being received. Cooling, heating,
and supply fan operation continues. However, the controller's
IAQ control function uses 400ppm as the fixed outdoor air CO
2
level until the fault condition is corrected.
SPACE TEMPERATURE
When Occupied, a Space Temperature alarm is generated if the
space temperature falls below the lower limit or rises above the
upper limit.
When Unoccupied, an unoccupied space temperature alarm is
generated when the space temperature falls below the alarm
configuration Unoccupied Low SPT Alarm Limit or when the
space temperature rises above the alarm configuration Unoccu-
pied High SPT Alarm Limit.
The following values are related to the Space Temperature
alarm:
Alarming Temperature – This variable displays the value of
the space temperature that caused the alarm and is only visible
when the space temperature is in an alarm state.
Alarm Limit Exceeded – This variable displays the value of
the alarm setpoint that was exceeded by the alarming space
temperature and is only visible when the space temperature is
in an alarm state.
SUPPLY AIR TEMPERATURE
This alarm indicates the supply air temperature fell below the
alarm configuration Low SAT Alarm Limit or exceeded the
alarm configuration High SAT Alarm Limit for 5 minutes. This
alarm is inhibited until the RTU has been running for 30 min-
utes to allow for system stabilization after startup.
SETPOINT SLIDER
This alarm indicates an open circuit is detected at the setpoint ad-
justment input. This can only occur if the Space Sensor Type is set
to T56. Note that only an open circuit results in an alarm. A short
across this input offsets the setpoints negatively by the amount
configured by configuration Setpoint Adjustment Range.
SWITCH CONFIGURATION
This occurs if more than one binary input (inputs 3, 5, 8, and 9)
is configured for the same function. When this happens the two
inputs (or more) configured wrong will be disabled as an in-
puts. This alarm will automatically be cleared when configura-
tion is corrected.
An example of this would be: Input 3 = Compressor Safety, in-
put 5 = Fan Status, input 8 = Fan Status, and input 9 = Humidi-
stat; the alarm would be active, unit would run, compressor
safety and humidistat would function normally, and Fan Status
(inputs 5 and 8) will be interpreted as “No Function.”
ANALOG INPUT CONFIGURATION
This occurs if more than one analog input (inputs 1 and 2) is
configured for the same sensor. When this happens the two in-
puts will be disabled as inputs. This alarm will automatically
be cleared when configuration is corrected.
An example of this would be: Input 1 = IAQ Sensor, input 2 =
IAQ Sensor; the alarm would be active, unit would run, but the
IAQ Sensor (inputs 1 and 2) will be interpreted as “No Function.”
SPACE RELATIVE HUMIDITY
This alarm indicates the space humidity fell below the alarm
configuration Low Space Humidity Alarm Limit or exceeded
the alarm configuration High Space Humidity Alarm Limit for
10 minutes. This alarm is inhibited until the RTU runs for 15
minutes to allow for system stabilization after start-up.
INDOOR AIR QUALITY
This alarm indicates the space CO
2
level exceeds the alarm
configuration Occupied High CO
2
Alarm Limit for 1-minute.
This alarm will be inhibited until the RTU has been running for
2-minutes to allow for system stabilization after start-up.
SUPPLY FAN RUNTIME
This alarm indicates the accumulated runtime exceeds the unit
configuration Supply Fan Service Alarm Timer value (when
not set to 0). This alarm is most commonly used to indicate an
equipment maintenance interval is due. The supply fan runtime
accumulator may be reset by setting the maintenance point
Reset Supply Fan Runtime Alarm to Clear, and then back to
Run – acknowledging each selection by clicking the OK button
when it appears. Setting unit configuration Supply Fan Service
Timer value to 0 disables the supply fan runtime alarm
function.
COMPRESSOR 1 RUNTIME
This alarm indicates the accumulated runtime exceeds the unit
configuration Compressor 1 Service Alarm Timer value (when
not set to 0). This alarm is most commonly used to indicate an
equipment maintenance interval is due. The Compressor 1
Runtime accumulator may be reset by setting the maintenance
point Reset Comp 1 Runtime Alarm to Clear, and then back to
Run – acknowledging each selection by clicking the OK button
when it appears. Setting unit configuration Compressor 1 Ser-
vice Timer value to 0 disables the Compressor 1 Runtime
alarm function.
COMPRESSOR 2 RUNTIME
This alarm indicates the accumulated runtime exceeds the unit
configuration Compressor 2 Service Alarm Timer value (when
not set to 0). This alarm is most commonly used to indicate an
equipment maintenance interval is due. The Compressor 2 run-
time accumulator may be reset by setting the maintenance
point Reset Comp 2 Runtime Alarm to Clear, and then back to
Run – acknowledging each selection by clicking the OK button
when it appears. Setting unit configuration Compressor 2 Ser-
vice Timer value to 0 disables the Compressor 2 runtime alarm
function. Note that this function is unavailable if the service
configuration Compressor Stages value is not set to Two
Stages.
FILTER
This alarm indicates the accumulated runtime exceeds the unit
configuration Filter Service Alarm Timer value (when not set
to 0). This alarm is most commonly used to indicate a filter re-
placement is due. Reset the filter service runtime accumulator
by setting the maintenance point Reset Filter Runtime Alarm to
On, back to Off, and clicking the OK button after each setting.
Setting unit configuration Filter Service Alarm Timer value to
0 disables the filter service alarm function.
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