Operation Modes - Delta HCH1850 User Manual

When you try to enter Setting or Administrator screen, a password prompt will occur. If no
operation is performed for a long time after login, the login status will become invalid after
the system becomes idle. If you want to re-enter the above menu, you must re-enter the
password.
In the password prompt screen, entering the admin password means the entry of admin-
istrator and entering the user password represents the entry of general users. If you only
enter Power ON/ OFF or Status screen, no password is required.
The user's default password is 0000.
5.5

Operation Modes

Operation
mode
Automatic
mode
Standby
mode
Manual
mode
InfraSuite RowCool Precision Cooling –
Chilled Water
NOTE:
To avoid unauthorized change of and access to important settings, do not
disclose the admin password. To get the admin password, contact service personnel.
Path :
To get the cooling unit to automatically control its cooling capacity, please
select the automatic mode and the system will automatically micro-adjust
the fan speed and the opening of the three-way ball valve in accordance
with the set points.
You may also simultaneously press
to quickly switch between the automatic mode and the standby mode.
NOTE:
automatic mode or standby mode.
Path:
In the standby mode, the fans run at the minimum speed, the three-way
ball valve is fully closed and the chilled water goes through bypass without
passing the coil.
Path:
The manual mode is used to test if the components work normally or
make the system operate in accordance with the manual setting. In this
mode, you may manually set: fan speed, ball valve opening, indicator on-
off, backlight on-off, buzzer on-off, alarm dry contact on-off and chiller's
water pump dry contact on-off.
In the manual mode, press ESC to automatically return to the standby
mode.
Description
In the manual mode, the simultaneous pressing of
for 3 sec will not make the unit automatically enter the
38
for three seconds in any screen