• 49 •CLIMATIC RT_UNITARY-IOM-1508-E
COMMUNICATION
ALARM 071, 072:
EXPANSION BOARD LINK, FAILURE
ALARM 073, 074, 075, 076:
INVERTER LINK, FAILURE
Description
The link between the expansion board(s) 1 or 2 and the CLIMATIC is disconnected.
• Alarm 71: the expansion board N°1 is disconnected from the CLIMATIC,
• Alarm 72: the expansion board N°2 is disconnected from the CLIMATIC.
Action
• Immediate shut down of the unit.
• The alarm is signalling.
Reset
Once the communication is re-established for 30 s, the alarm is automatically deleted.
Possible cause(s)
• Problem with wiring connection,
• Wrong expansion board address,
• Expansion board damaged.
Remedies
• Check the wiring connections,
• Check the expansion board address (refer to the “FREE INPUT / OUTPUT” paragraph),
• Replace the expansion board.
Description
The link between the inverter and the CLIMATIC has been disconnected for 5 s.
• Alarm 073: the blower inverter is disconnected from the CLIMATIC,
• Alarm 074: the exhaust inverter is disconnected from the CLIMATIC,
• Alarm 075: the condenser fan inverter of circuit 1 is disconnected from the CLIMATIC,
• Alarm 076: the condenser fan inverter of circuit 2 is disconnected from the CLIMATIC,
Action
• Alarm 073: immediate shut down of the complete unit. The alarm is signalling,
• Alarm 074: immediate shut down of the complete unit. The alarm is signalling,
• Alarm 075: immediate shut down of circuit 1. The alarm is signalling,
• Alarm 076: immediate shut down of circuit 2. The alarm is signalling,
Reset
Once the communication is re-established for 2 minutes, the alarm is automatically deleted.
Possible cause(s)
• Problem with wiring connection,
• Wrong inverter address,
• Inverter damaged.
Remedies
• Check the wiring connections,
• Check the inverter address,
• Replace the inverter.
To Next Page
Loading...
Need help?
General
