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TW-357 REV E
32
The DC solenoid valve requires that the battery be connected for the system to work properly. If the battery is
disconnected or completely discharged the valve operation and the control operation may be affected. In
particular, if the control is calling for a fill, the solenoid will be called to open. Opening the solenoid takes a
substantial inflow current, which the solenoid may “steal” from the control if it cannot get sufficient power
from the battery. This in turn will “fool” the control into believing that a power failure has occurred, which
will cause the control to reset and the valve to close. This will occur over and over again. If a battery-backed
control keeps turning itself on and then off, try recharging the battery by following the steps below.
Battery Charging: The Kryos control has a circuit that trickle charges the battery. This provides a fully
charged battery for the times when it is needed yet keeps it from being damaged by overcharging. If the
battery should become discharged, the following steps should be followed to charge it.
Turn the control off using the Power button on the front panel of the Kryos. Even though the control is turned
off, the battery will still be recharged.
Check all connections to the Kryos, especially the harness plug, the wall transformer and the battery extension
cable. The wall transformer should be plugged into the wall.
Wait for 30-60 minutes. After this time period, the battery should have enough power to run the control and
continue charging the battery.
Battery Life
The life of the battery will vary according to many factors including use and storage temperature. The lead-
acid batteries have an expected life of 3 to 5 years. For full functionality of your Cryo-Storage system we
recommend that the lead-acid battery be changed every 3 years.
INTERFACE SOFTWARE
Optional software (CRYOCOM) is available which allows a computer system to communicate with KRYOS
through the serial port on the freezer. The software provides the capability to download the logs, review
control settings, change control settings and perform system functions such as open/close the solenoid valve,
mute the alarm, etc. Contact Taylor-Wharton for details. Please have your Cryostorage System serial number,
KRYOS serial number and version number as it appears in ABOUT THIS CONTROL (MENU, 6, 4).
The Kryos control is also compatible with the SQR-1 Sequence that provides sequence filling at multiple
freezer locations.