Helmer Scientific i.Series
®
and Horizon Series
™
Refrigerator - Pass-Thru
Service and Maintenance Manual
360429/A
51
11 Maintenance
Maintenance tasks should be completed according to the schedule below.
NOTICE
• Review all safety instructions prior to recharging refrigerant.
• Maintenance should only be performed by trained refrigeration technicians.
Notes
• The preventive maintenance schedule provides recommended minimum requirements. Regulations or physical
conditions at your organization may require maintenance items to be performed more frequently, or only by designated
service personnel.
• Before performing maintenance, protect items in refrigerator from extended exposure to adverse temperature.
• Allow refrigerator temperature to stabilize at setpoint after performing service or after an extended door opening.
Table 12. Horizon Series Preventive Maintenance Schedule
Task
Frequency
1 year
2 years
As Needed
Test the high temperature
(over maximum temperature limit)
and low temperature
(below
minimum temperature limit)
alarms
(as required by your organization’s protocols)
.
ü
Test the power failure alarm
(as required by your organization’s protocols)
.
ü
Test the door alarm
(as required by your organization’s protocols)
.
ü
Verify the temperature calibration on the monitor and change it if necessary.
ü
Replace monitoring system backup battery.
ü
Examine probe bottle
(if installed)
and clean or replace if necessary.
ü
Check the solution level in the probe bottle
(if installed)
. Refill or replace if necessary.
ü
Check the chamber lights and replace if necessary.
ü
Clean the door gaskets, interior, and exterior of the refrigerator.
ü
Clean the condenser grill
(located under ventilated cover on ante-room side)
.
ü
Replace optional Access Control backup battery.
ü
Models with chart recorders
Check the backup battery for the chart recorder after an extended power failure
and change it if necessary, or change the battery if it has been in service for one
year. Refer to the Temperature Chart Recorder Operation and Service Manual.
ü
NOTICE
Remove ventilated cover and clean the condenser grill regularly. Dust accumulation on the condenser coil will vary based
on the environment. Some environments require quarterly cleaning.
Notes
During a power failure the monitoring system backup battery provides power to the monitoring system and power
failure alarm. If the backup battery is not functioning, the power failure alarm will not be activated and the battery should
be replaced.
Horizon Series
