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Operating Procedures
Alarm Handling
There are two alarms lists that can be accessed on the
HMI:
•
Main alarms list - It encompasses all the alarms/faults
that affect compressors/chiller operation 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.
Main Alarms List
Access: Main Menu > Alarm.
It lists all the current/acknowledged/reset alarms. When an
alarm occurs, a new message appears in RED on the
alarm screen.
All entries must be acknowledged with these buttons (see
below). This turns the entry YELLOW.
1. Press and hold the Reset button on the screen for 10
seconds. Any alarm condition that is clear will turn
GREEN. Any condition that is still yellow means the
condition still exists.
2. When all alarm entries on the alarm screen are green,
press the Delete button.
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Diagnostics Alarm List
Access: Main Menu > Setup Menu > HMI > Alarm.
Diagnostics alarms are handled in the same fashion as
main list alarms.
Apart from alarms list, the screen displays other chiller
diagnostic parameters.
Note: Do not delete the list if Yellow or Red.
Operator Tasks
Before operating the unit, ensure that all compressor
refrigeration service valves are fully back-seated
counterclockwise and all valves are in the open position.
Normal Power Up
The following procedure is used for a startup resulting from
scheduled seasonal or programmed cold shutdown of the
chiller.
WARNING
Hazardous Voltage!
Failure to disconnect power before servicing could
result in death or serious injury.
Disconnect all electric power, including remote
disconnects before servicing. Follow proper lockout/
tagout procedures to ensure the power can not be
inadvertently energized. Verify that no power is
present with a voltmeter.
Important: This start-up procedure is not to be used for the
first-time initial startup for a newly installed chiller.
1. De-energize the chiller using standard lockout/tagout
procedures.
2. Using a known operational voltage meter, test and
confirm the chiller is de-energized before proceeding
further.
3. Inspect power distribution fuses and overload settings
to verify they are correct.
4. Restore power.
5. Inspect refrigerant pressures using the touchscreen
interface panel.
6. Verify pressures correlate using manifold gauges.
ARTC-SVX013A-EN
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