Communication; Operation; Regular Tests - Bitzer LHL3E/2EES-2Y Instructions De Service

8.1.8

Communication

The upper side of the ECOLITE controller is equipped
with an RS485 interface for communication with other
devices (e.g. with a PC using the BITZER BEST SOFT-
WARE). The BEST adaptor can be connected to the
ECOLITE controller via an adaptor cable. To connect
an external device to the ECOLITE controller via a
plug-in connection, the following components are re-
quired:
Connector housing:
Contacts:
Contact assignment: Pin 1 – RS485-
Protocol:
Type of user:
Address:
Speed:
Data format:
Adjustment possibilities:
Note: Adjusting the parameters may lead to a situation
where the communication of the external device with
the controller is no longer possible without performing
further modifications on the external device.
Modbus Function
address
Modbus: Modbus address of ECOLITE controller
53274
1 – 255
(read
Setting ex factory: 1
and
write)
Modbus: Modbus speed
53275
0 = 1200
(read
1 = 2400
and
write) 2 = 4800
3 = 9600
4 = 19200
KB-206-1
1x MOLEX part No.:
51065-0300
3x MOLEX part No.:
50212-8000
Pin 2 – RS485+
Pin 3 – GND
Modbus RTU
Slave
1
19200 baud
1 start bit
8 data bits
Even parity
1 stop bit
Modbus Function
address
5 = 38400
6 = 57800
7 = 115600 baud
Setting ex factory: 4 = 19200 baud
Modbus: Modbus parity
53276
1= even
(read
2 = none
and
write) 3 = odd
Setting ex factory: 0 = even parity
After having changed the parameters listed above, an
interruption of the supply voltage and a restart of the
controller is required in order to activate the new values
for communication of the controller.

9 Operation

9.1 Regular tests

The condensing unit must be checked by a specialist at
regular intervals. The inspection intervals depend on
the refrigerant, the cooling medium and the operating
mode. They must be defined by the system operator.
CAUTION
Risk of injury due to escaping vapour on the
pressure relief valve
Do not work in the area where the vapour es-
capes from the pressure relief valve!
Check the following points:
• Oil level of the compressor.
• Evaporation temperature.
• Suction gas temperature.
• Condensing temperature.
• Difference between condensing temperature and air
intake temperature into the condenser.
• Discharge gas temperature:
• Oil temperature.
• Cycling rate.
• Current consumption of the compressor.
• Current consumption of the condenser fan(s).
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