25
Item 9 CCN bus number
Default: 0
Range: 0 to 239
NOTE: No two network elements can have the same element
number and bus number at the same time.
4.2.11 - Description of the ALARMS menu
This menu can be used to display and reset up to 5 active
alarms.
ITEM FORMAT DESCRIPTION
0n «AL» n alarms active/alarm resets
1* nnn Active alarm code 1
2* nnn Active alarm code 2
3* nnn Active alarm code 3
4* nnn Active alarm code 4
5* nnn Active alarm code 5
Key:
n : numerical display
* : This item is displayed if the alarm is active
Item 0 Number of alarms active/Reset all alarms
This item displays the number of alarms
active (e.g. “3 AL” means that 3 alarms
are active) and also allows them to be
reset even if the unit is operating. If there
are no alarms active, “0 AL” is displayed
in block 2.
To reset active alarms, press the button
twice in succession when this item is
displayed.
For example: Reset active alarms
OPERATION PRESS BLOCK 3 BLOCK 1 BLOCK 2
KEY LED DISPLAY DISPLAY
Hold down the MENU button
until the LED for Alarms lights.
Block 2 displays the number of
alarms active (2 alarms in this
example).
Press the A button to authorise the
alarms to be reset. The Alarm
menu LED flashes and 0 is
displayed in block 2.
Press the A button again to
validate the reset. The Alarm menu
LED stops flashing. “Good” is
displayed for two seconds, then
‘2AL’ and finally ‘0 AL’.
Items 1 to 5 Active alarm code number
See section 6.4 for a list and complete
description of the alarm codes.
0
02 AL
00
0
Good
then
2 AL
then 0 AL
Item 4 Select ramp loading
Default:0
Range: 0 or 1
Config.:0 = Ramp disabled
1 = Ramp enabled
NOTE: This configuration enables the ramp to be activated
for heating and cooling modes: the maximum rate (in°C/
min) of temperature drop (in cooling mode) or temperature
rise (in heating mode) for the water leaving the active heat
exchanger. However, each mode has its own ramp setting
which can be configured in the Configuration menu.
Item 5 Leaving water temperature reset select
Default:0
Range: 0, 1 or 2
Config.:0 = Reset not selected
1 = Reset based on returning
water temperature
2 = Reset based on an external 0-
10 V d.c. signal
NOTE: Reset based on a 0-10 V d.c. signal has precedence
over 0-10 V d.c. demand limit: if 0-10 V d.c. reset has
already been selected, then the selection of limitation by a
0-10 V d.c. signal will be automatically disabled.
Item 6 Select demand limit type
Default:0
Range: 0, 1 or 2
Config.:0 = Limitation not selected
1 = Limitation based on an
external contact
2 = Limitation based on an
external 0-10 V d.c. signal
NOTE: Limitation based on an external 0-10 V d.c. signal.
With this configuration, a value of 0 volt will enable the
unit to operate at full capacity (100%), and a value of 10
volts will limit demand completely (0%). Between these two
values, limitation shall exhibit a linear slope. However,
these reference voltage values (0 and 10 volts) are
configurable (by Carrier Service only), so that their upper
and lower values or the direction of the limitation slope can
be modified.
CAUTION: Reset based on a 0-10 V d.c. signal has
precedence over 0-10 V d.c. demand limit: if 0-10 V d.c.
reset has already been selected, then the selection of
limitation by a 0-10 V d.c. signal will be automatically
disabled.
Item 7 Software version number
NOTE: This item shows the number of the software version
used by this controller. Access is read-only.
Item 8 CCN element address
Default:1
Range: 1 to 239
NOTE: No two network elements can have the same element
number and bus number at the same time.
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