Operation In Power Failure; Auto Return; Notice Of Parts Replacement; Warning Message - Sanyo MDF-C2156VAN Service Manual

Ultra-low temperature freezer
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9.

Operation in power failure

Unit checks power failure by the port for detecting power failure in every 0.42 seconds.
Operation in power failure;
-
All ports for controlling compressor, cap. tube heater, LCD back lamp, signal lines and
digital lock turn off and unit operates to the mode in low power consumption.
-
LCD is turned off and intermittent buzzer beeps.
-
If you press BUZZER key, buzzer stops beeping, LCD back lamp is lit for 5 seconds
and you can check the time when power failure was occurred. However, buzzer beeps
again after buzzer resume time is passed.
-
Log data is stored.

10. Auto Return

Display changes to the basic screen if there are any key inputs for 90 seconds.
11.

Notice of parts replacement

-
Battery replacement: When battery accumulating time is over than 2.8 years,
'Please exchange batteries' is indicated.
-
Fan motor replacement: When fan motor accumulating time is over than 5.6 years,
'Please exchange fan motor' is indicated.

12. Warning message

-
High temp. alarm:
-
Low temp. alarm:
-
Power failure alarm: ' Power failure Warning 20XX/XX/XX XX:XX:XX '
-
Filter alarm: ' Please check a condenser filter '
13. Setting specifications
Internal temperature
High temp. alarm
Low temp. alarm
Alarm delay time
Compressor L ON/OFF
Cycle of Cap. tube heater ON
Differential of Compressor L
Filter alarm operation
Auto Return
Key lock password
' High Temp Warning 20XX/XX/XX XX:XX:XX '
' Low Temp Warning 20XX/XX/XX XX:XX:XX '
-155 ~-125
Ring Back
(Initial: -150 )
+5 ~+20
Door delay time
(Initial: +10 )
-5 ~-20
Log record time
(Initial: -10 )
15 min.
Compressor L delay time
ON: -34
Compressor delay time after
OFF: -12
power failure
Every 18hrs.
Cap. tube heater ON time
+/- 0.5
Compressor H protection
Message
Buzzer:ON/OFF
Internal temp. offset
(Initial: ON)
90 sec.
Auto MENU OFF
Initial: 0000
25
Y
M
D
H
M
S
1~99 min.
0: OFF
(Initial: 30 min.)
1~15 min.
(Initial: 2 min.)
2~30 min.
(Initial: 15 min.)
2 min.
2~15 min.
(Initial: 15 min.)
6~15 min.
(Initial: 8 min.)
OFF: +60
up
ON: AT+10
-4.0
60 sec.

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