SMC Networks HRS012-A-10 Series Service Manual page 31

11. Check for refrigerant leakage.
Refrigerant leakage reduces the cooling capacity. To check for refrigerant leakage, it is necessary to
make the refrigerant circuit temperature same as the ambient temperature. Stop the Thermo-Chiller
operation, and leave it not operating for 24 hours.
Take the following instructions to check for refrigerant leakage after leaving not operating.
(1)
Measure the ambient temperature (room temperature).
(2)
Check the pressure shown for "Ph: Refrigerant circuit pressure on the high pressure side" in the
"Check Monitor Menu" of the Thermo-Chiller.
(3) If the measured point is lower than the values shown in the graph in "Fig. 3.3-6: Ambient
temperature and refrigerant circuit pressure", it means there is refrigerant leakage caused.
12. After stopping power supply, check for the same alarm goes off again when the
chiller is re-started.
After stopping power supply (by tuning off the power supply switch on the Thermo-Chiller), check if
the same alarm goes off again when the Thermo-Chiller is restarted.
HRS Series
Chapter 3
Ambient temperature (
Fig. 3.3-6 Ambient temperature and refrigerant circuit pressure
Alarm Indication and Troubleshooting
o
C)
3.3 Troubleshooting
HRX-MM-N007
3-15