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48
FAULT HISTORY
10
08/28/2009
Fr 5:19A
Table 24 - Boiler Fault Screens
B. Cascade Menu
This menu is accessed by pressing < at the default menu or > at the
status menu.
Screen
CASCADE MASTER READY
SYS PUMP OFF
CASCADE NO FOLLOWER
SYS PUMP OFF
CASCADE NO SENSOR
SYS PUMP OFF
whl-445 Rev. 000 Rel. 014 Date 7.21.20
This screen displays the tenth oldest
boiler control lockout fault. The top
line will alternate between the words
'FAULT HISTORY' and the actual fault
encountered. The bottom line will
display the date and time that the fault
occurred.
Description
This screen displays when the boiler
is configured as a Cascade Master
and the system is ready to accept
a demand for heat. The second line
indicates the cascade system pump
output status. This screen alternates
with the default screen every 5
seconds or can be accessed by
pressing the < key from the default
screen.
This screen displays when the boiler
is configured as a Master Boiler and
there are no connected follower
boilers, or the follower boilers
are not powered. The second line
indicates cascade system pump
output status. This screen alternates
with the default screen every 5
seconds or can be accessed by
pressing the < key from the default
screen.
This screen displays when the boiler
is configured as a Master Boiler and
there is no system temperature
sensor connected or the system
sensor is defective. The cascade
system will still function in this
situation with reduced efficiency.
All boilers will run simultaneously
rather than in a staged fashion.
The second line indicates cascade
system pump output status. This
screen will alternate with the default
screen every 5 seconds or can be
accessed by pressing the < key from
the default screen.
CASCADE TT 0123 567
SYS PUMP ON
12:47P
Press v once.
CASCADE PWR
100%
PRESENT 01234567
Press v once.
o
CASCADE SYST
118
F
o
CASCADE SET
190
F
Press v once.
BOILER 0
100%
BOILER 1
56%
Press v once.
BOILER 2
0%
BOILER 3
0%
Press v once.
BOILER 4
0%
BOILER 5
0%
Press v once.
BOILER 6
0%
BOILER 7
0%
Table 25 - Cascade Menu
This screen displays information
about cascade status. The TT in the
center of the top line shows that
cascade demand is coming from
TT contact being closed. You may
also see DHW if the demand is
from a DHW sensor, or 0-10 if the
demand is from a 0-10 volt input.
The following numbers show which
boiler
addresses
are
currently
communicating to the master.
If a boiler address is not used or
communicating, the number will
not display. In the example to
the left, boiler address #4 is not
communicating. When a boiler
in the system is firing, its address
number will alternate with a ' . ' to
signify it is firing. The bottom line
shows the status of the system
pump output contacts.
This screen displays overall cascade
power output. The range of this
value is the number of boilers
communicating with the Master
x 100. For example, if 8 boilers are
connected and firing, the maximum
cascade power is 800%. The second
line shows which boiler addresses
are communicating with the Master.
This screen displays current system
temperature sensor reading on the
top line and the cascade system
temperature setting on the bottom.
This screen displays the current
cascade power demand output
on a per connected boiler basis
for boilers addressed as 0 and 1.
In the example, boiler 0 is being
commanded to fire at 100% and
boiler 1 at 56%. If this were a 2 boiler
system, the 'CASCADE PWR' screen
above would read 156%.
This screen displays the current
cascade power demand output on
a per connected boiler basis for
boilers addressed as 2 and 3.
This screen displays the current
cascade power demand output on
a per connected boiler basis for
boilers addressed as 4 and 5.
This screen displays the current
cascade power demand output on
a per connected boiler basis for
boilers addressed as 6 and 7.
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