Helmer Scientific i.Series
®
Ultra-Low Freezer
Service and Maintenance Manual
360173-A/C
15
Alarm
Settings
screens
Change an Alarm Setting
1. Touch
i.C
3
APPS
,
Settings
.
2. Enter the Settings password (default password is “1234”).
3. Scroll down and touch
Alarm Settings.
4. Touch the minus (-) or plus (+) on the corresponding
Setpoint
spin box to change an alarm setpoint.
5. Touch the minus (-) or plus (+) on the corresponding
Time Delay
spin box to change the time delay duration
6. Touch
Home
to exit the Alarm Settings screen.
Note
Changing a temperature alarm setting to a value within the operating range of the freezer may trigger a temperature alarm.
Non-Configurable Alarms
The following alarms indicate operational conditions which require the attention of the operator or a qualified service technician.
Table 5. Non-Configurable Alarms
Alarm
Description
Compressor Temperature
Low stage or high stage compressor discharge temperature is too high
Condenser Temperature
High stage condenser discharge temperature is too high
Clean Filter
Filter cleaning interval has been reached
CO
2
/ LN
2
Active
CO
2
/ LN
2
back-up refrigeration system has been activated
Low Battery
Rechargeable battery voltage is low
No Battery
Rechargeable battery voltage is too low or battery is disconnected
Refrigeration System
• Refrigerant pressure is too high
• High stage compressor temperature is above the upper limit
• Low stage compressor temperature is above the upper limit
• High stage compressor has failed
• Low stage compressor has failed
Emergency Mode
Chamber temperature sensor has failed, and i.C³ system is operating high stage and low stage compressors at 100%
duty cycle
Communication Failure
Communication Failure 1
• Triggered if communication is lost between i.C³ display board and control board
• Unit will continue to run with previously-saved settings
• Screen will not display temperature changes or alarm conditions
• i.C³ system will continue to reset until connection is re-established
Communication Failure 2
• Triggered if communication is lost between i.C³ display board and internal system memory
• Unit will continue to run with previously-saved settings
Communication Failure 3
• Triggered if the database is corrupted
• The database is archived and a new database is automatically created
• Unit will continue to run with previously-saved settings