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Operating Procedures
a. Each Hot Gas Bypass solenoid can be in one of the
following modes:
•
Auto. Solenoid controlled automatically;
•
Off. Solenoid is always forced off;
•
Manual. Solenoid is always forced on.
b. Access: Main Menu > Devices Menu > HGV
button > Solenoids button.
Security Configuration
The TACW Chiller control system has 3 levels of security:
1. User:
a. Automatic Logon.
b. View all main pages.
c. Can turn chiller on / off.
d. Can change user chilled water setpoint.
e. No access to Settings and Devices screens.
2. Tech:
a. User is responsible for day-to-day maintenance
of the chiller.
b. Has full access to Devices screens but no
access to Settings screens.
3. Admin:
a. Full Access.
Both Admin and Tech users must log on using the
button on the Main Screen and provide their username
and password in the user login screen.
Alarm Handling
There are two alarms lists that can be accessed on the
HMI:
•
Main alarms list. It includes all the faults that cause
compressors and/or chiller to shutdown and have to be
handled by the operator.
•
Diagnostics alarms list. It displays all the diagnostics
messages and is used for preventive/troubleshooting
purposes. It can be accessed by Admin user only.
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1. Main alarms list:
a. Lists all the current / acknowledged / reset.
b. When a fault occurs, a new message appears in
RED on the alarm screen.
c. All entries must be acknowledged with these
buttons:
This turns the entry YELLOW.
d. Then press and hold the Reset button on the
screen for 10 seconds. Any condition that is clear
will turn GREEN. Any condition that is still yellow
means the condition still exists.
e. When all entries on the screen are green, press the
delete button:
Note: Do not delete the alarm list if any are Yellow
or Red.
f.
Access: Main Menu > Alarm button.
2. Diagnostics alarm list
a. Diagnostics alarms are handled in the same fashion
as main list alarms.
b. Access: Main Menu > Setup Menu > HMI button >
Alarm button.
c. Apart from alarms list the screen displays also other
chiller diagnostic parameters.
Note: Do not delete the list if any are Yellow or Red.
ARTC-SVX007A-EN
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