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

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HRX-MM-N007
Chapter 3 Alarm Indication and Troubleshooting
HRS Series 3.3 Troubleshooting
3-51
AL12: Low super heat temperature
<Detection method> This alarm goes off when the compressor intake temperature sensor detects the
value that is lower than the converted temperature by the refrigerant circuit
pressure sensor (for low pressure).
1.
Is the flow rate of
the circulating fluid less
than 5 L/min?
2.
Check the pump
performance.
Connect a by-pass piping.
4.
Check the compressor
intake temp. sensor.
5.
Check the compressor
intake temp. sensor after
replacement.
9.
After stopping the
power supply, does the same
alarm goes off again when the
chiller is restarted?
Please contact SMC or distributor.
N
Y
Normal
Error
N
Normal
Error
Error
Normal
3.
Is circulating fluid
contaminated?
Low super heat temp. AL12
Are other alarms being
generated simultaneously?
Y
Check the troubleshooting that is
corresponding to the alarm number
that is being generated.
Error
6.
Check the pressure sensor in
the refrigerant circuit.
7.
Check for an input
to the pressure sensor
in the refrigerant
circuit.
Normal
Error
10.
Check the analogue
output of the the pressure
sensor (for low pressure) in the
refrigerant circuit.
8.
Check the display
of the pressure sensor (for low
pressure) in the refrigerant
circuit.
Error
Error
Normal
Normal
Normal
Y N
Y
Replace the pump.
See section "4.5.3
Replacement of pump (For
standard pump)",
and section "4.5.4
Replacement of high
pressure pump".
N
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 low pressure), which
is a part of the refrigerant circuit,
needs to be replaced. Only a
specialized operator is allowed
to handle the refrigerant circuit.
Electronic expansion valve,
which is a part of the refrigerant
circuit, needs to be replaced.
Only a specialized operator is
allowed to handle the refrigerant
circuit.
See document No. HRX-MM-
Q016 for replacement.
Clean the circulating fluid circuit.
See a document No. HRX-MM-
S060 for cleaning instructions.
If contamination with the circulating
fluid circuit cannot be removed by
cleaning, the heat exchanger,
which is an evaporator and a part
of the refrigerant circuit, needs to
be replaced. Only a specialized
operator is allowed to handle the
refrigerant circuit.
See document No. HRX-MM-Q014
for replacement.