XT Controllers for NLV-CN Compressors
Page 48 / 49
4.19.1.
List of Possible Events
The following events are useful to track changes and operations during the life of the control unit
T4C event
Text
T4C event
Value 1
T4C event
Value 2
Description
Event database cleared The event database was cleared.
Parameter changed –
[Parameter name]
New value
A parameter has been changed.
(The parameter name is in the brackets.)
User-connected
System,
Tool4Cool
®
,
Secop Front end,
Third-party front end,
Supply chain FFT,
Supply chain ICI,
Supply chain RA,
OEM production,
MMI
When a new user uses the system a log-
ging of the event will be done in order to
track who has made changes.
Mains voltage detected
115 V
230 V
This event is normal after powering up the
system.
Temperature log cleared The temperature log has been cleared.
Automatic baud rate
change detected
9600 baud
19200 baud
The baud rate has been automatically
changed.
System boot The system has started.
Acknowledge of alarms
The alarm has been acknowledged by the
user.
Factory settings stored
The factory settings have been stored in
the database.
Factory settings restored
The factory settings in the database have
been restored.
A220 Case cleaning com-
pleted
This alarm shows that case cleaning has
been completed.
A226 Controller in service
mode
This alarm shows that the controller has
been set in service mode.
Code Function Description
L50 PCB temperature Readout of the controller temperature on the circuit board
L51 Inverter temperature Readout of the controller temperature on the inverter module
L52 Mains voltage Readout of mains supply voltage
L53 Mains frequency Readout of mains supply frequency
L60 Compressor manual control Shows that the compressor is in manual mode
L61 Compressor actual state Indication of whether the compressor is running or not
L62
Compressor manual speed per-
centage when running
Set point of the actual compressor speed, in % of the variable speed
band during manual control.
0% means compressor runs at minimum speed and 100% means that
the compressor runs at max speed during service mode.
L63
Compressor actual speed per-
centage when running
Readout of the actual compressor speed, in % of the variable speed
band during manual control.
0% means compressor runs at minimum speed and 100% means that
the compressor runs at max speed during service mode.
4.20.
Service Mode
Accessing the service mode makes it possible to manually set the outputs and read the status of the
inputs. This improves the service ability of the whole cabinet.
Functional description:
To protect the NLV against unauthorized setting modifications, the NLV is protected with access codes
for the different user levels. To access the Service level, the appropriate access code for the service level
“Access code service” (o07) must be entered first.
In the service level it is possible to read different measurements, as well as force the relay outputs ON or
OFF and force the compressor to run at different speeds.
Readings:
In the service level, the following readings are available:
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