38
EXPERT WW rev.12
EXPERT WW
11.
ALARMS
When an alarm occurs, the controller lights up
the alarm pilot light, displays letters
“AL”
on
the LED display, and post the alarm condition
into the alarm log menu. The table on the right
gives a list of all possible alarm conditions.
Another alarm situation occurs when power to
the controller fails. In this case, the alarm relay
is activated. When the alarm relay is activated,
the normally open contact (
) closes.
Display
Meaning
Low Temperature
Alarm
Low temperature alarm
High Temperature
Alarm
High temperature alarm
Low Static
Pressure
Low static pressure alarm
High Static
Pressure
High static pressure alarm
Probe #1-8
Defect
A temperature probe is
defective
Outside Probe #x
Defect
Outside probe #x is defec-
tive
Whisker Switch
Defect
The Whisker switch is
defective
Water Spill
Water consumption too high
SP Sensor Defect
The static pressure sensor is
defective
Inside RH Sensor
Defect
The indoor humidity probe is
defective
Outside RH
Sensor Defect
The outdoor humidity probe
is defective
Relay panel
comm. Error
Communication is disrupted
between controller and relay
panel.
Inlet potentiom-
eter defect
The potentiometer is defec-
tive.
Feeder #x run
time exceeded
A feeder has been running
continuously on a too long
period of time.
Water module
comm. Error
Communication is disrupted
between controller and
water meter module.
the
Critical Temperature
, is defined to continue
monitoring the indoor temperature for high
temperatures. When the indoor temperature
reaches the critical high temperature (defined
as an absolute value), an alarm is set off.
Detection of
Temperature Alarms
Room T°
Alarm
Limits
Hi T°
limit
Hi T°
alarm
Lo T°
limit
Set
Point
Temperature Alarms in Clean Mode
The controller can monitor low temperature
alarms when it is in clean mode. If this alarm
condition is used, the controller sounds an
alarm when the temperature falls below low
alarm limit that is associated to the clean
mode.
The low alarm limit used in clean mode is re-
lated to the clean mode set point; this means
the alarm limit is automatically adjusted when
the clean mode set point changes.
Water Spill Alarm
A water spill alarm sets off when the consump-
tion of a water meter exceeds its consumption
limit. This limit can ranges from 1 to 10,000
gallons or liters per 15 minutes.
Static Pressure Alarms
The controller can sound an alarm when the
static pressure (SP) level exceeds high or low
pressure limits for a certain period of time.
Feeder Alarm
The controller sets off an alarm if a feeder
runs continuously on a too long period of
time. When this type of alarm occurs, the
relay associated with the problematic feeder
opens in order to stop the feeder motor. This
alarm condition is optional.
11.1. Alarm Log
1. Select:
Main menu
Monitoring
Alarm Log
Alarm
conditions
Details
about
the selected
alarm
Alarm Log
Use to navigate
Logged at Jan 01 200X
12:00 A
Temperature
High °F
Probe 5 Defective
Probe 4 Defective
11.2. Alarm Conditions
Temperature Alarms
The diagram below shows how temperature
alarms are detected.
When the average room temperature exceeds
the high temperature alarm setting, a high
temperature alarm is set off. When the aver-
age room temperature decreases below the
low temperature alarm setting, a low tempera-
ture alarm is set off. Although these settings
are entered by the user as absolute values,
they are defined based on the room set point.
They are thus automatically adjusted if the
set point changes.
The situation is slightly different when the
outside temperature is greater than the room
set point. In this case, the outside tempera-
ture becomes the reference point (instead of
using the set point as a the reference). This
means an alarm is set off when the room
temperature reaches
Outside Tempe High
Alarm Offset
(the offset being the difference
between the high alarm temperature setting
and the set point). A third parameter, called
