S&A CWFL-500, User Manual

Page: 15 / 20

TY-JS-211220-00
9
15
VI. Alarm & Output Terminal
In order to guarantee the equipment will not be affected while abnormal situation
happens to the chillers, the chillers are designed with alarm protection function.
1. Alarm output terminals and wiring diagram.
2.Alarm causes and working status table.
Note: The alarm output port is connected with a set of normally open and normally closed
contacts of the relay inside the machine. The working current should be smaller than 3A while
the working voltage should be smaller than 300V.
Display
Condition
Alarm
code
Buzzer OUT H1
、
H2 OUT H1
、
H3
Circulating pump works
properly
DISCONNECTION BREAKOVER
Ultrahigh room temp E1 Sounds BREAKOVER DISCONNECTION
Ultrahigh water temp E2 Sounds BREAKOVER DISCONNECTION
Ultralow water temp E3 Sounds BREAKOVER DISCONNECTION
Faulted room temp sensor
（
constant temp invalid
）
E4 Sounds BREAKOVER DISCONNECTION
Faulted water temp sensor E5 Sounds BREAKOVER DISCONNECTION
Alarm of water shortage E6 Sounds BREAKOVER DISCONNECTION
Low flow rate /
water flow alarm
E6/E7 Sounds BREAKOVER DISCONNECTION
Faulted circulating pump E7 Sounds BREAKOVER DISCONNECTION
Chiller power failure BREAKOVER DISCONNECTION