Sanyo MDF-C2156VAN, Service Manual, Page: 28 / 42

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