6 Configuration
Installation manual
25
LMSEY1A09/13 + LMSEY2A19/25
Daikin LMS
4P728170-1 – 2023.03
6.5.2
To activate the shared parameters for
multiple units
It is possible to share some parameters between the primary unit
controller and its secondary unit controllers. This way these settings
only have to be done on the primary unit.
The list of the shared parameters is:
▪ Setpoint,
▪ Differential,
▪ PID for compressor control (cdt, cPr, cti),
▪ PID for valve control (P4, P5,P6),
▪ Defrost parameters (dt1, dP1, dd, Fd),
▪ High and low alarms (AL, AH, ALA, AHA, A1),
▪ Date & time,
▪ Eco timebands (tS1-tS8, tE1-tE8).
INFORMATION
ONLY the primary unit controller can change these
parameters when the sharing procedure is enabled. These
parameters can’t be changed on secondary unit
controllers.
It is possible to enable/disable the sharing procedure for each
controller. To do this:
1
On the primary unit controller, set the parameter ESP_n of the
secondary unit controller to "1" to enable, "0" to disable.
▪ E.g. with ESP_1 = 0 and ESP_2 = 1, the sharing procedure is
only enabled with secondary unit controller 2 and not with
secondary unit controller 1.
Name
Description
Default
Min.
Max.
ESP_1 Enable shared parameters for
secondary unit controller 1
0
0
1
ESP_2 Enable shared parameters for
secondary unit controller 2
0
0
1
ESP_3 Enable shared parameters for
secondary unit controller 3
0
0
1
ESP_4 Enable shared parameters for
secondary unit controller 4
0
0
1
6.5.3
To set the shared functions for multiple
units
Lights
Lights can be connected to all controllers in the network and the light
status is always synchronised. Each controller will turn the lights on
and off simultaneously.
The time during which the light stays on after opening and closing
the door is set by parameter H14, and can be set from 0 to
240 minutes. See
"6.3 To change the parameters"
Door open
The door microswitch must be connected to the primary unit
controller in the network. Door status is "open" if the switch is open.
As for the lights, also the door status is shared to all controllers.
Every controller knows if the door(s) is/are open or not, and each
controller can perform the actions that are set in parameters "DIE",
"DIP", "rIE" and "rIP".
Network temperature regulation
The temperature regulation can be performed in two ways
depending on the parameter "nrt" with the following values:
▪ 0: The relative controller regulates through the probe connected to
itself.
▪ 1: The relative controller regulates through the probe connected to
the primary unit controller.
The network logic allows avoiding simultaneous starts of
compressors. Using the "SSd" parameter it is possible to set a delay
between starts of different LMSEY units.
If it is necessary to start several units at the same time, the first unit
to signal to start will be the first one to start. After "SSd" the next unit
will also start and so on (See the example below).
1
0
C1
C2
C3
C4
CM
sec.
A
B
SSd SSd SSd SSd
SSd
1
0
1
0
1
0
1
0
1
On
0
Off
A
Compressor status
B
Request status
C1
Compressor secondary unit 1
C2
Compressor secondary unit 2
C3
Compressor secondary unit 3
C4
Compressor secondary unit 4
CM
Compressor primary unit
SSd
Delay between start up [s]
Note:
LM25AYE01 units have two compressors, but work
in a similar way.
Name
Description
Default
Min.
Max.
nrt_1
Network temperature regulation
for secondary unit 1.
▪ 0: The relative controller
regulates through the probe
connected to itself.
▪ 1: The relative controller
regulates through the probe
connected to the primary unit
controller.
0
0
1
nrt_2
Enable shared parameters for
secondary unit 2
0
0
1
nrt_3
Enable shared parameters for
secondary unit 3
0
0
1
nrt_4
Enable shared parameters for
secondary unit 4
0
0
1
SSd
Delay between the start up of
different compressors (in
seconds).
20
0
300
Network defrost
It is possible to enable/disable this functionality for each controller
separately.
Defrost can be synchronised between the primary unit controller and
secondary unit controllers using parameters dS_1, dS_2, dS_3, and
dS_4 with the following values:
▪ 0: No synchronisation performed.
