一、Chiller Alarm (Red Light Flash)-With Water Circulation - S&A CW-5000 Series Service And Repair Handbook

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.
The Status II: Water circle running normal, the alarm continuing (red light flash).
Reason:
1、 Flow switch issue
2、 Relay issue
Testing Method
1）Turn off the chiller, and then open the sheet metal on the chiller, locate the flow switch at outlet.
2）Cut off two red wires on the baffle flow switch, and then connect these two wires .Turn on the
chiller to observe if the alarm continues.
2.1）If the alarm stop (green light flash).It can be judged as the flow switch malfunction.
Solution: Replace the baffle flow switch.
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