Troubleshooting - Phcbi MDF-1156 Series Operating Instructions Manual

TROUBLESHOOTING

If the unit malfunctions, check out the following before calling for service.
Malfunction
If nothing operates even
when switched on
No refrigeration
The cooling is poor
Alarm test key cannot
actuate the alarm
Recorder for ATN type
does not operate normally
Noise
Backup test switch does
not operate normally (when
the backup cooling kit is
provided)
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.
■ The unit is not connected to the power supply.
■ There is a power failure.
■ The fuse is blown or the circuit breaker is activated.
■ The voltage too low. (In this case, call an electrician.)
■ The breaker free.
■ The environmental temperature is too high.
■ The door is not shut tightly.
■ The inner lid is not installed correctly.
■ The set temperature is not set properly.
■ The grille is blocked out.
■ The condenser filter is clogged.
■ The freezer is in the direct sunlight.
■ There is any heating source near the freezer.
■ A rubber cap and insulation for the access port are not set
correctly.
■ You put too many unfrozen articles into the freezer compartment.
■ The battery has been discharged entirely. In this case, operate
the freezer for about 3 hours and switch on the alarm test key
again. Entirely discharged cell requires about 2 days' operation.
■ 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.
■ If the chart was not fed, examine the dry cell. The cell for the
recorder lasts about 1 year.
■ If the temperature was not recorded, examine the ink pen. The pen
should be our specified one. Is the recorder chart set correctly?
■ The freezer is not stable.
■ The freezer is not leveled with the leveling feet.
■ There is anything touching the frame.
■ It is the first operation after shutdown.
■ High temperature loads this freezer, and sometimes causes a noise.
Accordingly when the temperature lowered, the noise ceases.
■ The liquid N tank is not filled up.
2
■ The valve of the tank is not opened.
■ The pressure of liquid N
suppliers about its installation, removal, adjustment, and examination.
20
Check/Remedy
is 0.5 kg/cm 2 G. Inquire at liquid N
2 2