Filter
Top Products
18
OPERATING INSTRUCTIONS
Alarm, safety function, and self diagnostic function
This unit has the alarm and safety functions shown in Table 2, and also self diagnostic function.
Table 2 Alarm and safety functions
Kind of alarm
or safety
Situation Indication Buzzer Safety operation
High
temperature
alarm
If the upper or lower
temp. sensor senses a
temperature 6
o
C.
Low
temperature
alarm
If the upper or lower
temp. sensor senses a
temperature 2
o
C.
Alarm lamp flashes.
Intermittent tone.
Remote alarm is
active.
Over-temp.
(high) alarm
If the high-temp.
thermostat sensor
senses a temperature
approximately 10
o
C.
Unit should already be
in alarm. No further
indication required.
Unit should
already be in a
high temp. alarm.
Remote alarm is
active.
Compressor ON.
Heater OFF.
Power failure
alarm
Interruption of power to
unit or power switch is
turned off.
Alarm lamp flashes.
Temp. indication off.
Intermittent tone.
Remote alarm is
active.
Door alarm
Outer door is ajar or
open.
Door check lamp is lit.
Intermittent tone
after a delay of 2
minutes.
Not affected.
Auto return
No key operation on
control panel for 90
seconds.
Monitor bottle temp. is
displayed.
-----
Calibration mode
is canceled.
Upper temperature
sensor goes open or
short circuit.
Alarm lamp flashes.
Monitor bottle temp.
E1 are alternately
displayed.
Lower temperature
sensor goes open or
short circuit.
Alarm lamp flashes.
Monitor bottle temp.
E2 are alternately
displayed.
Defrost sensor goes
open or short circuit.
Alarm lamp flashes.
Monitor bottle temp.
E3 are alternately
displayed.
Thermal
sensor
abnormality
Over-temp. sensor goes
open or short circuit.
Alarm lamp flashes.
Monitor bottle temp.
E4 are alternately
displayed.
Intermittent tone
Remote alarm is
active.
Note: The remote alarm contacts will activate in conjunction with the audible alarm. The remote alarm
contacts can be deactivated while pressing the BUZZER key when the unit is in alarm, except in a power
failure alarm where the contacts will remain in an alarm condition until the power failure is corrected. All
alarm functions will auto-reset. The buzzer and remote contacts will re-activate if the condition which
caused the alarm is not corrected within 30 minutes. Alarm conditions will remain active for about 24
hours on a fully charged back-up battery in the event of a power failure. Two days operation is required
to fully charge the battery after initial start-up if the power has been off for an extended period. The
remote alarm contacts will remain active even if the battery is discharged.
Alarm set procedure
Press the ALARM TEST key. The audible and visual alarm indicators will activate along with the remote
alarm contacts. The alarm condition will remain active for 90 seconds and then terminate automatically.
Otherwise the alarm test can be terminated manually at any time during the rest by pressing the ALARM
TEST key a second time.