S&A RMUP-300 - Page 9

RMUP-300 Series
9
<5> Alarm function and output ports
In order to protect the safety of equipments when something unusual happens to
cooling water recycle, RMUP-300 series chiller equip with alarm protection
function.
1. Alarm causes and working status table
Display
working status
Buzzer
Input port
H1、H2
Output port
H1、H3
Circulation pump works properly
Disconnection
Breakover
Media temperature sensor failure
Sounds
Breakover
Disconnection
Ambient temperature sensor failure
Sounds
Breakover
Disconnection
Flow rate protection
Sounds
Breakover
Disconnection
Liquid level protection
Sounds
Breakover
Disconnection
Upper temperature limit alarm
Sounds
Breakover
Disconnection
Lower temperature limit alarm
Sounds
Breakover
Disconnection
Lower flow rate limit protection
Sounds
Breakover
Disconnection
Abnormal system operation
Sounds
Breakover
Disconnection
Interruption of chiller power supply
Breakover
Disconnection
2. Alarm and MODBUS RS-485 communication output terminal diagram.
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.