HRX-MM-N007
Chapter 3 Alarm Indication and Troubleshooting
HRS Series
3.3 Troubleshooting
3-105
AL26: Compressor discharge pressure sensor failure
<Detection method> This alarm goes off when the pressure detected by the refrigerant circuit
pressure sensor (for high pressure) is out of the -0.33 to 3.0 MPa range.
Compressor discharge
pressure sensor failure
AL26
1.
Check the connection.
Check for the correct
connections.
Error
Normal
Error
Error
2.
Check for an input
to the pressure sensor in the
refrigerant circuit.
Normal
Normal
3.
Check the output of
the refrigerant circuit
pressure sensor.
Replace the main board.
See section "4.5.16
Replacement of main board
& communication board".
See document No. HRX-MM-
S029 for replacement.
Refrigerant circuit pressure
sensor (for high pressure), which
is a part of the refrigerant circuit,
needs to be replaced. Only a
specialized operator is allowed to
handle the refrigerant circuit.
