Delta HCH1850 User Manual page 45

User PW
To alter the current user's password , enter four digits.
Unit
Set the temperature unit and the default is (°C).
Delay On
The time difference between setting the startup of automatic mode and the actual
operation. The cooling unit will start up in the seconds you have designated.
Baud rate
Please set the on-line speed based on the Modbus protocol. The options include 9600,
19200, 38400 and 57600 and the default value is 9600.
Total Alarm
Decide what event can trigger the output dry contact 1. Please refer to the following
descriptions:
1. All: Any alarm and fault event can trigger it.
2. Fault: Only fault events can trigger it.
Alarm events
1. Filters are clogged
2. Abnormal internal communication
3. High and low of air supply/ return
temperature and humidity
4. High and low chilled water inlet/ outlet
temperature
Fault events
1. Emergency stop/ remote emergency
stop
3. Leakage alarm/ leakage open-circuit
alarm
4. Fire
5. Smoke
6. Abnormal air supply/ return temperature
and humidity sensor
6. High and low of remote temperature
and humidity
7. Overtime of maintenance
7. Abnormal remote sensor
8. Abnormal chilled water inlet/ outlet
temperature sensor
10. Abnormal fan
11. Abnormal three-way ball valve
41
Chapter 5 Operation