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Section 4
Alarms
Wrong Power Alarm
High Stage System
Compensation Alarm
Multiple Alarms
Micro Board Failure
Lost Communication
4-2
Model 5600 Series
If a 230V freezer is connected to a 120V power source or a 120V freezer is
connected to a 230V power source, the electronics will detect that an
incorrect power source has been connected to the freezer. Under this
condition, the fans and compressors will not turn on and an audible and
visual alarm will occur along with the "WRONG POWER" message in the
LED message center.
The "WRONG POWER" alarm may also occur if the battery switch is
turned to Standby mode ( ) prior to applying power to the freezer. The
audible and visual alarms will remain until the freezer is connected to the
correct power source.
This condition is created when the high stage compressor and fans run for
30 minutes and are not capable of cooling the interstage heat exchanger to
Failure
the proper temperature. Under this condition, the high stage compressor
and fans will turn off after 30 minutes, and an audible and visual alarm
will occur along with the "HS SYST FAIL" message in the LED message
center.
Voltage
If the freezer is compensating for high or low line voltage, the system will
measure the compensated AC voltage. If the voltage is incorrect, the unit
will stop attempting to compensate, and the compressors will run on direct
line voltage. Under this condition, the message center will display
"VCOMPEN FAIL".
When multiple alarm conditions occur, active messages are displayed in the
message center one at a time, updating at 5 second intervals. Pressing Mute
during multiple alarms causes all active alarms to be muted and to ring
back in 15 minutes.
An internal communications failure has occurred with the micro board.
During this alarm, the compressor(s) attempt to run continuously.
Alarm
However, with this type of failure, freezer operation becomes
undependable.
Communication between the micro board and the display board has been
lost. Under this condition, the visual alarm LED flashes along with dashes
Alarm
(----) in the temperature display. In addition, 'LOST COMM' flashes in
the message center. Contact Technical Services.
VWR International
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