Manual Part 7

Heat Exchanger Climate Unit
EPC Bus Connectors
The E PC bus is an optional communication bus used for RBS communicati on.
Table 4 EPC Bus Connectors
Connector
Function
TD Transmit
RD Receive
Test Button
The test button on the front pan el of the CCU activates the t est fun ction. After
the
test has been completed, the indicators 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
Hea
ter active
Normal opera tion/failur e information from the indicators
Ericsson AB
SE-164 80 Stockholm
Sweden
asq.us@ericsson.com
No part of this docum ent may be reproduced in any form without
the wr itten permission of the copyright owner. The contents of
this document are subject to revision without notice due to
continued progress in methodology, design and manufacturing.
Ericsson shall have no liability for any error or damage of any
kind resulting from t he use of this document.
© Ericsson AB 2004 All Rights Reserved
8 (
8)
EN/LZT 720 0311 Uen R2A