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Model 700 Series -40C ___________________________________________________________________________Alarms
3.1 Alarms
The Model 700 Series -40C freezer alarms are displayed on the freezer control panel. When an alarm is active, the indicator
next to the alarm description will light and there will be an audible alarm. Press the Silence key to disable the audible alarm for the
ringback period. The visual alarm will continue until the freezer returns to a normal condition. The alarms are momentary alarms
only. When an alarm condition occurs and then returns to normal, the freezer automatically clears the alarm condition.
Description
Power Failure
High Temperature Alarm
Low Temperature Alarm
Probe Failure - see Section 3.2
Door Open
Wrong Power
Low Battery*
Hot Condenser
All alarm delays and ringback times are ±30 seconds.
* The automatic battery test runs 12 hours after initial start-up, then every 12 hours thereafter.
3.2 Wrong Power
The Wrong Power alarm occurs when incorrect voltage is
applied to the freezer. 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 the "Wrong Power" has
been applied. Under this condition, the fans and compressors
will not turn on and an audible and visual alarm will occur. This
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. The audible alarm cannot be silenced
under this condition.
3.3 Probe Failure Alarm
The microprocessor in Model 700 Series freezers continual-
ly scans all probes including the control probe, heat exchanger
probe and condenser probe to ensure that they are operating
properly. Should an error be detected, the "Probe Failure" alarm
will occur as described in Section 3.1 above. If an error is
detected with the control probe, the high and low stage compres-
sors will run continuously. As a result, the cabinet temperature
will decrease until it reaches the lowest temperature that the
refrigeration system can maintain. If an error is detected with
the heat exchanger probe, the freezer will cycle properly at its
temperature set point using a 5 minute step start between the
high and low stage compressors. If an error is detected with the
condenser probe, there is no impact on the performance of the
freezer; however, the hot condenser alarm may also occur.
Contact the Technical Services department (1-888-213-1790) or
your local distributor.
Section 3 - Alarms
Delay
Ringback
1 min.
15 min.
1 min.
15 min.
1 min.
15 min.
1 min.
15 min.
1 min.
15 min.
0 min.
none
1 min.
12 hours
1 min.
none
3.4 Voltage Compensation Alarm
detected by the controls that will result in an audible and visual
alarm. If the freezer is compensating for high or low line volt-
age, the system will measure the compensated AC voltage. If the
voltage is incorrect, the unit will stop attempting to compensate,
and the compressor will run on direct line voltage. Under this
condition, there will be a visual and audible alarm that can be
silenced with a ringback period of fifteen minutes. This alarm
condition is unlikely to occur, and as such, there is no LED
alarm indicator for this condition.
3 - 1
Relay
Yes
Yes
Yes
No
No
Yes
No
No
In addition to the alarms listed above, another condition is
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