HRX-MM-N007
Chapter 3 Alarm Indication and Troubleshooting
HRS Series
3.3 Troubleshooting
3-21
17.
Check the analogue
output of the the pressure sensor
(for high pressure) in the
refrigerant circuit.
15.
Check the display
of the pressure sensor (for
high pressure) in the
refrigerant circuit.
Error
Error
Normal
Error
11.
Check the pressure
sensor in the refrigerant
circuit.
14.
Check for an input to the
pressure sensor in the
refrigerant circuit.
Normal
Error
Normal
Normal
18.
Check the analogue
output of the the pressure sensor
(for low pressure) in the
refrigerant circuit.
16.
Check the display
of the pressure sensor (for
low pressure) in the
refrigerant circuit.
Error
Error
Normal
Go back to "12. Check if the
coolant leaks".
12.
Check if the coolant leaks.
13.
After stopping the
power supply, does the same
alarm goes off again when the
chiller is restarted?
With
leakage
Repair the refrigerant circuit.
Only a specialized operator is
allowed to handle the refrigerant
circuit.
Please contact SMC or distributor.
No leakage
N
Y
Replace the main board.
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.
See document No. HRX-MM-S029 for
replacement.
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.
Normal
See section "4.5.16
Replacement of main board
& communication board".
