S&A CWUL-05 - Alarm and output terminal; Alarm output terminals and wiring diagram; Alarm causes and working status table

CWUL-05/10/20 Series
10
<5> Alarm and output terminal
In order to guarantee the equipment will not be effected while abnormal situation
happens on the chiller, CWUL-05/10/20 series chillers possess alarm protection
function.
1. Alarm output terminals and wiring diagram.
2. Alarm causes and working status table.
Note: The flow alarm is connected to the normally open relay and normally closed
relay contacts, requiring operating current less than 3A, working voltage less 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