S&A CW-5000 Series Service And Repair Handbook
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Also See for CW-5000 Series:
- User manual (15 pages) ,
- Installation & operation instructions (17 pages)
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Summary of Contents for S&A CW-5000 Series
- Page 1 CW-5000/5200 Series Industrial Chiller Malfunction Testing and Repair Handbook ...
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Page 2: Table Of Contents
Catalog 一、 Chiller Alarm (red light flash)—with water circulation………………P1-P4 二、 Chiller Alarm (red light flash)—without water circulation…………..P5 三、CW-5000 Series Temperature Controller T-503 alarm………………..P6-P10 3.1Alarm code E1: ultrahigh room temperature 3.2Alarm code E2: ultrahigh water temperature 3.3Alarm code E3: ultralow room temperature 3.4 Alarm code E4: room temperature sensor failure... -
Page 3: 一、Chiller Alarm (Red Light Flash)-With Water Circulation
一、Chiller Alarm (red light flash)—With Water Circulation Turn off the chiller, connect the outlet and inlet with 1 meter’s water pipe (as picture), and then turn on the chiller to observe the running status. The Status: Water circle running normal, the alarm stop (green light flash) Reason: The pipes which use to connect the chiller and apply machine and the pipes within the apply machine are choking (Such as pipe blockage or bending etc.) Solution: Clean the pipes to remove blockage, or replace the bending or damage pipes. - Page 4 2.2）If the alarm keep going (red light flash), please reconnect two red wires back to flow switch to conduct next testing 3）Cut off four wires on the Hall flow switch, connect the red wire with other red one, the black wire connect with the yellow one.
- Page 5 Clean the pipes to remove blockage or replace the bending or damage pipes. 2）Check output voltage of switching mode power supplies with testing tools; Standard working voltage of switching mode power supplies is DC24V for CW-5000 series machine. ...
- Page 6 Solution: Take away the shell of DC pump and check if there is choking or wore in rotor. If the alarm continues, it will need to replace DC pump. 4 ...
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Page 7: 二 Chiller Alarm(Red Light Flash)-Without Water Circulation
2） Check output voltage of switching mode power supplies with testing tools; standard working voltage of switching mode power supplies is DC24V for CW-5000 series machine. 2.1）If output voltage of switching mode power supplies lower than DC18V, the life and flow of pump will affect due to low voltage, it can be judged as failure of switching mode power supplies or pump failure. -
Page 8: 三、Cw-5000 Series Temperature Controller T-503 Alarm
三 、 CW-5000 Series Temperature Controller T-503 alarm (the alarm buzzer within Temperature Controller goes with code display when alarming) Remarks: In alarming status, the alarm sound could be suspended by pressing any button, but the alarm display remains until the alarm condition is eliminated. - Page 9 Texting method 1）Check input voltage of fan with testing tools (depending on the model: please refer to the manual technical parameters). If there is voltage input, it can judge is fan failure; if no voltage input, it can judge is circuit poor contact or fan short circuit.
- Page 10 3.4）Check the input wire (white color) of compressor with ammeter, if current is triple times or above than rated current, it can be judged as the rotor within the compressor not working. 4）Under refrigeration status, the compressor can work. 4.1）Observe the refrigeration piping (as picture) whether there is oil tracking or frosting, such as oil or frost phenomenon, can be judged refrigerant leakage (such as inside the condenser or evaporator internal pipe line leakage refrigerant).
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Page 11: Alarm Code E3: Ultralow Room Temperature
6）Compressor Rotor not working Observe weather the compressor is vibrating when thermostat reaches refrigeration status (D2 of thermostats light on). If there is no vibration of compressor and surface of compressor got heating, it means the interior of compressor malfunction. Solution: Replace compressor Alarm code E3: ultralow room temperature Reason:... -
Page 12: Alarm Code E5: Water Temperature Sensor Failure
to original terminals. 1.2）If there is E4alarm, can determine the temperature controller malfunction; If there is E5 alarm, can determine the room temperature sensor failure. 1.3）If the alarm display E4 ,E5 at the same time , suggest to replace room temperature sensor and temperature sensor and temperature controller Alarm code E5: Water temperature sensor failure Reason:... -
Page 13: 四、The Machine Does Not Work When Power Is On
四、The machine does not work when power is on Reason: 1、Fuse Fusing 2、Switching Mode Power Supplies Testing method 1）Open the safety tube and check if the fuse is fused (as picture).If fused, replace the standby insurance tube. 2）Check AC220V voltage (depend upon the mode of machine) of two groups of wire on the Switching Mode Power Supplies with Universal meter etc tools, if only one group with the AC220Vvoltage can judge switching mode power suppliers failure , will need to replace a new one.
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Questions and answers
The INDUSTRIAL CHILLER CW-5000 (SN: CS50781963) we are currently using does not work with the following symptoms. Please let us know how to solve this problem. When we turn on the power, the screen flashes as shown in the attached picture and the machine does not work. We rebooted the machine, but there was no change.
If an S&A CW-5000 industrial chiller shows a flashing screen and does not operate, follow these troubleshooting steps:
1. Check Water Circulation:
- Turn off the chiller.
- Connect the outlet and inlet with a 1-meter water pipe.
- Turn on the chiller and observe the running status.
2. Identify the Status:
- If the water circulates normally and the alarm stops (green light flashes), check for blockages or bends in the pipes. Clean or replace them if necessary.
- If the water circulates normally but the alarm continues (red light flashes), further investigation is needed.
3. Check Possible Causes:
- Ensure the aluminum fin of the condenser is not heavily clogged with dust.
- Verify that the heat load does not exceed the refrigeration capacity.
- Confirm that the working voltage meets the required specifications.
- Inspect the fan, temperature controller, compressor capacitor, compressor protector, refrigerant level, refrigerant solenoid valve, and the compressor itself for faults.
4. Electrical Testing:
- Use testing tools to check the input voltage of the fan. If voltage is present and the fan does not work, replace the fan. If no voltage is present, check for circuit issues or a fan short circuit.
- In refrigeration mode, check the working voltage output at the compressor terminals. If no voltage is present, the thermostat may be faulty.
- Check the solenoid valve voltage output. If voltage is present, the solenoid valve may need inspection or replacement.
Following these steps should help diagnose and resolve the issue.
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