SMC Networks HRS012-A*-10-*, Руководство по обслуживанию

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HRX-MM-N007
Chapter 3 Alarm Indication and Troubleshooting
3.3 Troubleshooting HRS Series
3-98
AL23: Circulating fluid return temp. sensor failure
<Detection method> This alarm goes off when the circulating fluid temperature sensor (for return) detects
temperature that is outside of -80 to 120
o
C range.
N
Y
2.
Does "AL22" go
off when the cables that are
connected to PT1 and PT2
are exchanged and
connected?
1.
Check the connection.
Check for the correct
connections.
Error
Normal
Circulating fluid return temp.
sensor failure
AL23
Replace the main board.
See section "4.5.16
Replacement of main board
& communication board".
Replace the circulating fluid
temperature sensor (for
return) "PT2".
See section "4.5.2
Replacement of the
temperature sensor (PT2)".