HRX-MM-N007
Chapter 3 Alarm Indication and Troubleshooting
3.3 Troubleshooting HRS Series
7. Water-cooled condenser is contaminated.
Contamination given to the water-cooled condenser reduces cooling capacity. Check the
water-cooled condenser for contamination by following the instructions shown below:
(1) Remove the pipings connected to the inlet and outlet of the facility water.
(2) Remove the upper panel and the right panel.
(3) Remove the plug of the water-cooled condenser, and check inside the water-cooled condenser
for contamination.
8. Check the main board.
Check that the main board outputs signals.
Disconnect the connector "CN1" on the power board.
Perform settings of the tester to make it possible to measure 24 VDC.
Contact the negative side probe to the connector pin number 7 on the cable side of the "CN1" that
has been removed, and contact the positive side probe to the pin number 8.
Operate the Thermo-Chiller (by pressing "RUN/STOP" key), and heck the voltage between the cable
connectors number 7 and number 8.
<Normal> Between pin numbers 7 and 8: 24 VDC
Fig. 3.3-66 The port for visual check for
contamination inside the water-cooled
condenser
Fig. 3.3-67 Check the compressor signal
output
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