Reference Manual

Climate Unit for RBS 2106 Heat Exchanger Climate Unit
Ericsson AB
SE-164 80 Stockholm
Sweden
[e-mail]
Due to continued progress in methodology, design and manufacturing,
the contents of this document are subject to change without notice.
© Ericsson AB
8 (8) EN/LZT 720 0311 R1A
Indicators
Table 3 CCU front panel indicators
Indicator Description Colour
CCU FAULT Fault Red
OPERATION Operational Green
EPC BUS EPC-bus fault Yellow
HEAT FAULT Heater fault Yellow
HE.INT.FAN Heat exchanger internal fan fault Yellow
HE.EXT.FAN Heat exchanger external fan fault Yellow
PWR. FAULT Power fault Yellow
EPC-bus Connectors
The EPC-bus is an optical communication bus used for RBS communication.
Table 4 EPC-bus connectors
Connector Function
TD Transmit
RD Receive
Test button
The test button on the front panel of the CCU activates the test function. After
the test has been completed, the indicators will present the status for two
minutes. No alarm is sent if there is a malfunction.
The total test time is approximately 6.5 minutes. During that time, the following
are checked:
• External fan
• Internal fan
• Heater active
• Normal operation/failure information from the indicators
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