Helmer Scientific i.Series
®
Ultra-Low Freezer
Service and Maintenance Manual
360173-A/C
20
4 Maintenance
Maintenance tasks should be completed according to the schedule below.
CAUTION
• Maintenance should only be performed by trained refrigeration technicians.
• Review all safety instructions prior to performing maintenance.
Notes
•
It is important to ensure that all scientific equipment is maintained regularly for optimum performance.
• These are recommended minimum requirements. Regulations for your organization or physical conditions at your facility
may require maintenance items to be performed more frequently, or only be designated service personnel.
Table 8. Preventive Maintenance Schedule
Task
Frequency
Quarterly
Annually
2 years
As Needed
Verify the monitor/chamber temperature sensor accuracy. Calibrate the sensor
if necessary.
Verify the ambient temperature sensor accuracy. Calibrate the sensor if
necessary.
Test the High and Low chamber and Ambient Temperature alarms.
Test the Power Failure alarm (as required by your organization’s protocols).
Test the Door Open alarm.
Inspect electrical components and wiring terminals in the electrical box for
discoloration. Contact Helmer Technical Service if any discoloration is found.
Inspect and clean the condenser filter.
Replace the i.C
3
back-up battery
Defrost and clean the chamber, exterior door gasket, and inner doors.
NOTICE
•
Inspect and clean the condenser filter as directed in the maintenance schedule, or when prompted by the i.C³ control and
monitoring system.
•
The Clean Filter alarm monitors the condition of the air filter as a safety measure. The alarm is designed to warn if the filter
media becomes clogged such that freezer operation and product integrity will be affected.
• The Clean Filter alarm could indicate a failure of the condenser fan.
Notes
• During a power failure, the back-up battery provides power to the monitoring system, power failure alarm, and chart recorder
(if equipped). If the back-up battery is not functioning, the power failure alarm will not be activated.
• If the back-up battery does not provide power to the monitoring system during the power failure alarm test, replace
the battery.
• During a power failure, the Access Control lock will continue to secure the door. To access the freezer during a power
failure, the override key must be used.
