SMC Networks HRS012-A-10 Series Service Manual page 107

Check of power supply
1.
Check if the power supply is correct.
(1) Check if the power supply is within the specified range. Measure the power supply voltage that
is connected to the connector of the power supply cable to be connected to the Thermo-Chiller
with a tester, and check if the power supply voltage is within the specification range.
Thermo-Chiller model: HRS
- -10 (100V spec.): Single phase 100 VAC (50/60Hz), 115 VAC (60Hz)
- -20 (200V spec.): Single phase 200 VAC to 230 VAC (50/60 Hz)
(2) Check that there is no temporary voltage drop or instantaneous power supply stop caused with
the power supply.
2. Check the compressor operation.
Leave the Thermo-Chiller in an operation stop state for 2 hours or more (to decrease the
temperature of the compressor body).
After starting Thermo-Chiller operation, judge if the compressor is operating with the compressor
operating noise and the vibration of the compressor.
(When checking vibration, use a screwdriver to touch the compressor body. Do not touch the
compressor body directly with hand as it becomes hot while it is operating.)
3. Check the facility water system.
Check that the facility water system capability satisfies the required facility water flow rate that is
specified in the Operation Manual.
4. External load is out of the specification range.
Cooling capacity varies depending on the facility water temperature, set circulating fluid temperature,
and power supply frequency.
Please refer to the "Cooling capacity" graph shown in the Operation Manual.
Facility water is contaminated.
5.
Check that the facility water is clean (without any foreign matter or discolouration).
6. Incorrect flow rate of the facility water.
Install a flow meter and check that the facility water system satisfies the required facility water flow
rate that is specified in the Operation Manual.
* Facility water does not flow when the Thermo-Chiller is not operating. Check the facility water flow
rate while the external load is being applied to the Thermo-Chiller or the circulating fluid temperature
is being decreased.
HRS Series
Chapter 3 Alarm Indication and Troubleshooting
□-□-10/20-□
Power supply specification
HRX-MM-N007
3.3 Troubleshooting
3-91