Manual for MDF-U53V

Manual for MDF-U53V

Brand: SANYO

Category: Refrigerator

Document Type: Manual

Language: EN

Uploaded: Nov. 21, 2025, 7:15 p.m.

Warranty Information

Refer to the manual for detailed warranty information.

Control Panel Functions:

  • Key & Switch BUZZER: Silences alarms, shows PT sensor temp. during power failure.
  • ALARM TEST: Activates alarm test mode, simulating alarm conditions.
  • SET: Enters set mode to change values; confirms changes.
  • STATUS: Displays status codes ('- - 1', '- - 2', '- - 3').
  • Directional Keys (→, ←): Shift digits during setting, adjust values.

Temperature Control:

  • Setting range: -50°C to -90°C.
  • Procedure: Use SET and directional keys to adjust and confirm.

Temperature Alarm:

  • High temp. alarm: +5°C to +20°C (initial +10°C).
  • Low temp. alarm: -5°C to -20°C (initial -10°C).
  • Procedure: Access via function mode (F01 for high, F02 for low), set value using keys.

Key Lock Mode:

  • Setting range: 0 (off) or 1 (on).
  • Procedure: Long press directional key to enter, use keys to set, press SET to save.

Function Mode:

  • Access: Long press directional key.
  • Examples: F03 (Battery accumulating time), F04 (Door alarm delay), F05 (Compressor delay), F07 (Temperature sensor adjustment).

Warning Functions:

  • Door Alarm: Activates after a set delay when the door is open.
  • High/Low Temp. Alarm: Triggers when temperature deviates from set points.
  • Filter Blockage: Alerts when the condenser filter temperature reaches a threshold.

Cascade Control:

  • Compressor L operates based on cascade sensor temperature during pull-down and pull-up.

Auto Return:

  • Automatic reversion to PV mode after 90 seconds of inactivity (not in F09, F10).

Sensor Temperature Display:

  • F12-F15 display temperatures from various sensors.

Battery Accumulating Time:

  • Displayed in F03; replace battery when shown as '02.5'.

Condensing Fan Motor Accumulating Time:

  • Displayed in F32; reset with code '419' in F06.

Monitor of Status:

  • DP52 lamp indicates ambient temp. issues, voltage problems, or high refrigerating circuit running rate.

Troubleshooting and error codes

Malfunction Check/Remedy
The chamber is not cooled at all The circuit breaker of power source is active.
The voltage is too low (In this case, call an electrician).
The power is not supplied.
The breaker is free.
The large amount of articles (load) is stored in the chamber at one time.
The cooling is poor The ambient temperature is too high.
The latch of inner door is not closed completely. The outer door is not closed firmly. (The frost or ice between the cabinet and door gasket possibly prevents door seal.)
The air intake vent is blocked.
The condenser filter is clogged. Always clean the filter when the filter check lamp is lit.
The door is not shut tightly.
The inner door is not installed correctly.
The set temperature in the controller is not set properly.
The grille is blocked out.
The filter is clogged.
The freezer is in the direct sunlight.
There is any heating source near the freezer.
A rubber cap and insulation are not set correctly.
You put too many unfrozen articles into the chamber.
Alarm test key cannot actuate the alarm The alarm is activated only when the power switch is ON.
When only the buzzer or only the alarm is actuated by the alarm test key, the unactuated part is out of order, and must be replaced.
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