Description Of The Information Menu - Carrier 30GX Installation, Operation And Maintenance Instructions

4.2.4 - Description of the INFORMATION menu

This menu is used to display the unit's main operating
parameters.
ITEM FORMAT DESCRIPTION
0 Displays active operating type
LOFF Local Off
L-C1 Local On - Cooing setpoint 1
L-C2 Local On - Cooing setpoint 1
L-H Local On - heating setpoint
LC1r Local On - Cooling setpoint 1 - Reclaim)
LC2r Local On - Cooling setpoint 2 - Reclaim)
CCn CCN Control
rEM Remote Control
1 n n n n Displays active modes:
1 2 3 4
n n = 1st active mode
1 2
n n = 2nd active mode
3 4
2*** n n n n Displays active modes:
1 2 3 4
n n = 3rd active mode
1 2
n n = 4th active mode
3 4
3*** n n n n Displays active modes:
1 2 3 4
n n = 5th active mode
1 2
n n = 6th active mode
3 4
4*** n n n n Displays active modes:
1 2 3 4
n n = 7th active mode
1 2
n n = 8th active mode
3 4
5*** n n n n Displays active modes:
1 2 3 4
n n = 9th active mode
1 2
n n = 10th active mode
3 4
6** Cool Heating/cooling operation
Heat Cool/heat
7 nn Number of active capacity stages
8** nnn Present demand limit in %
Inh Demand limit disabled in Local operating type
9 nnn Total active capacity of unit in %
10 nnn Total active capacity of circuit A in %
11* nnn Total active capacity of circuit B in %
12 ±nn.n Active setpoint in °C
13** ±nnn Control point in °C
14** nn.n Condensing or reclaim setpoint in °C
15 n n Reserved for use by Carrier Service only
1 2
16 n n n n Reserved for use by Carrier Service only
1 2 3 4
17 ±nnn Heat reclaim mode indicator, circuits A/B
18 n.n Reserved for use by Carrier Service only
19 n.n Reserved for use by Carrier Service only
Key:
n : numerical display
* : This item is displayed in certain unit configurations only.
** : Under certain operating conditions this item flashes (in block 1 of
main interface).
*** : This item is not displayed when zero.
Item 0 Displays active operating type
This item displays the current operating
type in text format.
Items 1-2-3-4-5 Displays active modes
Each of these items can display two
active modes at the same time. The first
two figures display one mode and the last
two figures display another. These items
enable up to 10 active modes to be
displayed.
For example: 510 means that modes 5 and
10 are active. 11 means that mode 11 is
active.
Description of modes:
MODE # MODE NAME DESCRIPTION
1 Local Off The unit has stopped in local mode because operating type
Local Off (LOFF) has been selected with the operating
type selector button.
2 CCN Off The unit has stopped in CCN mode because operating
type CCN (CCn) has been selected with the operating
type selector button and either:
• the unit has received a CCN halt command, or
• the controller has received a start command over the
network but the start/stop remote control is authorised in
CCN mode and the controller has received a halt
command from a volt-free contact connected to the
customer terminal block (see note, section 5.1).
3 Remote off The unit has stopped in remote mode because operating
type Remote Control (rEM) has been selected with the
operating type selector button and the unit has received a
shutdown command from volt-free contacts. See section
3.4.3, description of start/stop contact.
4 Local The unit is authorised to start up in local mode because
Operation operating mode Local Operation (L-C1 or L-C2 or L-H or
LC1r or LC2r) has been selected with the operating type
selector button.
5 CCN The unit is authorised to start up in CCN mode because
Operation operating type CCN (CCn) has been selected with the
operating type selector button and the unit has received a
CCN start command, and either:
• the start/stop remote control is not authorised in CCN
mode, or
• the start/stop remote control is authorised in CCN
mode and the controller has received a start command
from a volt-free contact connected to the customer
terminal block (see note, section 5.1).
6 Remote The unit is authorised to start up in remote mode because
Operation operating type Remote Control (rEM) has been selected
with the operating type selector button and the unit has
received a start command from volt-free contacts. See
section 3.4.3, description of start/stop contact.
7 Delay at The delay at start-up is active after the unit has been
start-up active switched on or after the unit has been stopped. If the
pause has not expired the mode is active. The delay can be
configured in the configuration menu.
8 2nd cooling The second cooling setpoint is active because one of the
setpoint active following conditions has been met:
• Operating type Local Operation - Cooling Setpoint 2
(L-C2) has been selected;
• The unit is in operating type CCN (CCn) and has
received a network command to use cooling setpoint 2;
• The unit is in operating type Remote (rEM) and
cooling setpoint 2 has been selected with remote
contacts. See section 3.4.4, description of setpoint
selection contact.
9 Setpoint reset Setpoint reset is active. In this mode, the unit uses the
active reset function to adjust the leaving water temperature
setpoint. Depending on the configuration, the setpoint can
be reset by reference to:
• An external 0-10 V d.c. signal (supplied by customer
or 0-10 V d.c. temperature sensor);
• The difference in temperature between water leaving
and returning to the evaporator (cooling) or condenser
(heating); For the reset function to be activated it must
be configured (see section 4.2.10). Mode 9 is only
active if the reset value calculated by the system is
non-zero.
10 Demand Demand limit is active. In this mode, the demand at
limit which the unit is authorised to operate is limited by
active reference to either:
• An external 0-10 V d.c. signal (supplied by customer)
or
• A volt-free contact.
For the demand limit function to be activated it must be
configured (see section 4.2.10). Mode 10 is only active if
the machine demands capacity greater than the limit value.
11 Ramp loading Ramp loading is active. In this mode, the rate of tempera-
active ture drop (cooling mode) or rise (heating mode) in °C/min
in the active heat exchanger leaving water is limited to a
preset value in order to prevent compressor overload. The
ramp values can be modified (see section 4.2.7).
12 Low temp. The unit is in heating mode and the temperature of the
protection evaporator leaving water is lower than the lesser of the two
heating mode cooling setpoints. A capacity stage is removed. This mode
only applies to heat pumps.
13 + 14 Low suction 13 = circuit A & 14 = circuit B
temperature Protection for evaporator suction low temperature circuit
protection is active. In this mode, circuit capacity is not authorised to
rise if the unit is in cooling mode, and saturated suction
temperature in the circuit is lower than the frost protection
threshold.
15 + 16 Low discharge 15 = circuit A & 16 = circuit B
superheat In this mode the circuit capacity is not authorised to rise.
protection
17 High pressure Circuit A is under high pressure protection because the HP
protection protection threshold has been exceeded. Circuit capacity is
circuit A not authorised to rise, and any slave compressors may be
stopped in order to prevent a high pressure break.
18 High pressure Circuit B is under high pressure protection because the
protection HP protection threshold has been exceeded. Circuit
circuit B capacity is not authorised to rise, and any slave
compressors may be stopped in order to prevent a high
pressure break.
19 Unit under Unit is under control of a System Manager (FSM or CSM
III)
SM control
20 Master/slave Unit is connected to a secondary unit by a master/slave
link active link and either:
• The unit is configured as a master and this master is
operating, or
• The unit is configured as a slave and the master is
operating.
21 + 22 Liquid level (21 = circuit A & 22 = circuit B)
reset Active, if there is a large difference between leaving water
circuit B temperature and SST
15