SMC Networks HRS012-A-10 Series Service Manual page 56

HRX-MM-N007
Chapter 3 Alarm Indication and Troubleshooting
Check the main board.
5.
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 6 on the cable side of the "CN1" that
has been removed, and contact the positive side probe to the pin number 8.
Check the voltage between the cable side connectors number 6 and number 8 while making an
isolated operation of the pump (by pressing the "RUN/STOP" key and "MENU" key simultaneously).
<Normal> Between pin numbers 6 and 8: 24 VDC
3.3 Troubleshooting
3-40
Fig. 3.3-25 Check the pump signal output
HRS Series