Lennox CLIMATIC 60, Руководство пользователя

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CLIMATIC™ 60 – AIRCOOLED CHILLERS
MUL 41E -0610/ 06-2011 Page 83
ALARM 071, 072:
EXPANSION BOARD LINK, FAILURE

Description
The link between the expansion board(s) 1 or 2 and the CLIMATIC™ 60 is disconnected.
• Alarm 71: The expansion board N°1 is disconnected from the CLIMATIC™ 60,
• Alarm 72: The expansion board N°2 is disconnected from the CLIMATIC™ 60.

Action
• Immediate shut down of the unit.
• The alarm is signalling.

Reset
Once the communication is re-established for 30s, the alarm is automatically deleted. Up to 6 trips can occur during
a day and are saved in the alarm historic. The five first trips don’t give the alarm alert except if a trip is still present
during 1 hour, and are automatically reset every day at 6h00 am. The sixth trip activates the fault report and must
be manually reset.

Possible cause(s)
• Problem with wiring connection,
• Wrong expansion board address,
• Expansion board damaged.

Remedies
• Check the wiring connections,
• Check the expansion board address (refers to the “FREE INPUT / OUTPUT” paragraph),
• Replace the expansion board.