SMC Networks HRS012-A-10 Series Service Manual page 51

Check the external piping.
1.
Check if the external piping is in the conditions shown below:
(1) The external piping has close bending, curves at a sharp angle or clogging.
(2) A valve or a switching valve is mounted in the middle of the external piping, and it closes the
piping temporarily.
(3) A filter (strainer) for circulating fluid is used, and the filter is clogged.
2. Check the operating time of the Thermo-Chiller.
Operate the Thermo-Chiller as a single unit.
Connect an external piping of an I.D. of approximately 15 mm and a length of 2 meters or less) and a
valve that is capable of roughly regulating pressure to the Thermo-Chiller.
Start operating the Thermo-Chiller with the valve fully open.
(1) Check that "AL06: High circulating fluid discharge pressure" will not be generated with the valve
fully open.
(2) Display the circulating fluid discharge pressure "P1" on the operation panel, and gradually close
the valve while the Thermo-Chiller is operating.
Check that "AL06: High circulating fluid discharge pressure" is generated when the circulating
fluid discharge pressure "P1" reaches the pressures shown below:
- Option T: 0.7 MPa
- Option MT: 0.6 MPa
Check for any clogging in the heat exchanger.
3.
Check for clogging in the heat exchanger (evaporator) due to contamination contained in the
circulating fluid adheres to the heat exchanger.
Operate the Thermo-Chiller as a single unit.
(1) Connect an external piping of an I.D. of approximately 15 mm and a length of 2 meters or less)
and a valve that is capable of roughly regulating pressure to the Thermo-Chiller.
(2) Do not connect the piping to the circulating fluid return port that is usually connected to it. Open
the cap of the water fill port and inset the piping to the water fill port (to stop the circulating fluid
entering the heat exchanger).
Operate the Thermo-Chiller to confirm that the "AL06: High circulating fluid discharge pressure"
goes off. If it does not, it will cause clogging in the heat exchanger.
HRS Series
Chapter 3
Fig. 3.3-21 Piping example
Alarm Indication and Troubleshooting
3.3 Troubleshooting
HRX-MM-N007
3-35