Phcbi MDF-U5412, Operating Instructions Manual

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22
TROUBLESHOOTING
If the unit malfunctions, check out the following before calling for service.
Malfunction Check/Remedy
If nothing operates even
when plugged in □ The unit is not connected to the power supply properly.
□ The capacity and voltage of power supply is not sufficient.
□ There is a power failure.
□ The circuit breaker on the supply circuit is activated.
□ The fuse on the supply circuit is blown.
The alarm device is
activated during operation □ The unit is not connected to the power supply properly.
□ The capacity and voltage of power supply is not sufficient.
□ There is a power failure.
□ The circuit breaker on the supply circuit is activated.
□ The fuse on the supply circuit is blown.
□ The chamber temperature setting was changed.
□ The door was kept opened for a long time.
□ The containers of high temperature (load) were put in the chamber.
□ The door is opened.
No key operation is
available □ The key lock is set in ON (L 1).
→ Set the key lock in OFF (L 0).
During the setting mode,
the mode returns to the
temp. display mode  The setting mode returns to the temperature display mode
automatically when 90 seconds has passed without any key operation
(auto-return function).
Noisy □ The floor is not sturdy.
□ The installation location is not level.
□ The freezer is tilted.
□ The cabinet contacts the surrounding wall.
When chamber does not
get cold enough □ A large amount of items or warm product was put in the chamber.
□ The door is frequently opened.
□ The chamber temperature setting is high.
□ The unit is in direct sunlight.
□ The unit is not installed in the installation location specified in this
operating instructions.
□ The ventilation around the unit is blocked.
□ There is a nearby heat source.
□ The ambient temperature is too high.
→ The allowable ambient temperature is between 5 o C and 30 o C.
□ The stored items are too much.
□ The access port is not covered.
→ The access port should be covered with the insulation and rubber
caps when no use.
□ The door seal is damaged.
→ If it is damaged, contact our sales representative or agent for
replacement.
□ Any foreign substance is located between door gaskets.
Note:
If the malfunction is not eliminated after checking the above items or the malfunction is not shown in the
above table, contact our sales representative or agent.