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If the unit is left idle for a period of approximately 30 seconds during service mode, the unit will exit service mode and return to
normal operation.
Note
If an alarm occurs while in the service mode, it will not show until exiting this mode.
To reset values back to factory settings, perform the following procedure:
1. Turn keyswitch to “OFF” position.
2. Hold the up ( ) and down ( ) arrows while turning the keyswitch to the “ON” position.
3. Continue to hold buttons for approximately 10 seconds.
4. Release buttons and turn keyswitch to “OFF” position.
5. Turn keyswitch to "ON" position.
Performing this reset will overwrite any changes made after receipt of this unit and may overwrite any changes that were
made at the factory to optimize performance.
9.5 Temperature Settings
The factory default temperature setting is -30°C for plasma freezers. To change the factory temperature settings, refer to the
instructions in
Section 9.3
.
The freezer described in this manual is designed for optimum performance at -30°C. It is advisable to call
Technical Service before changing setpoints.
9.6 Alarms
The alarm system is designed to provide visual and audible warning signals for both power failure and rise in temperature.
The alarm is equipped with a battery backup.
Default cold and warm alarm values are -35°C and -20°C. These values may be adjusted, following instructions in
Section 9.3
.
The alarm system is activated only when the key switch is turned to the Alarm On position. The audible warning signal sounds
when there is a power failure, temperature alarm condition, or when the door is ajar for approximately 3 minutes with default door
alarm setting.
The Mute function (pressing the (
SCAN
) button) allows you to turn off the audio warning without turning off the visual
indicators. The alarm will ring back after approximately 6 minutes if the alarm is still active.
During a warm alarm, a flashing of the uppermost bar of the thermometer, the temperature display, and the speaker icon will
occur at the same time. If there has been a warm alarm since the last alarm reset, but the temperature is not currently in an
alarm state, the uppermost bar of the thermometer and the speaker icon will slowly alternate in flashing.
During a cold alarm, a flashing of the bulb of the thermometer, the temperature display, and the speaker icon will occur at the
same time. If there has been a cold alarm since the last alarm reset, but the temperature is not currently in an alarm state, the
bulb of the thermometer and the speaker icon will slowly alternate in flashing.
During a power failure, the power failure icon will illuminate, the thermometer will display without the bulb, and the
temperature will flash approximately every 3 seconds. If there has been a power failure since the last alarm reset, the power
failure icon and the speaker icon will slowly alternate in flashing.
During a low battery condition, the low battery icon will illuminate.
The alarms can be reset by pressing and holding the and simultaneously.
