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Panasonic U-16MX4 Manual

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U-5~18MX4 + U-8~16ME4✽M + U-8~16ME4 + U-4~6ML5
Urban Multi air conditioner
4PW40727-1A
Operation manual
7
Symptom 12: The display shows " ".
■ This is the case immediately after the main power supply switch
is turned on and means that the remote controller is in normal
condition. This continues for one minute.
Symptom 13: The compressor in the outdoor unit does not stop after a
short heating operation
■ This is to prevent oil and refrigerant from remaining in the
compressor. The unit will stop after 5 to 10 minutes.
Symptom 14: The inside of an outdoor unit is warm even when the unit
has stopped
■ This is because the crankcase heater is warming the
compressor so that the compressor can start smoothly.
Symptom 15: Hot air can be felt when the indoor unit is stopped
■ Several different indoor units are being run on the same system.
When another unit is running, some refrigerant will still flow
through the unit.
11. TROUBLESHOOTING
If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
The system must be repaired by a qualified service person.
■ If a safety device such as a fuse, a breaker or an earth leakage
breaker frequently actuates or the ON/OFF switch does not
properly work.
Measure: Turn off the main power switch.
■ If water leaks from the unit
Measure: Stop the operation.
■ The operation switch does not work well.
Measure: Turn off the power.
■ If the display , the unit number and the operation lamp
flash and the malfunction code appears. (See figure 7)
Measure: Notify your dealer and report the malfunction code.
If the system does not properly operate except for the above
mentioned cases and none of the above mentioned malfunctions is
evident, investigate the system according to the following
procedures.
1 If the system does not operate at all
■ Check if there is no power failure.
Wait until power is restored. If power failure occurs during
operation, the system automatically restarts immediately after
the power supply is recovered.
■ Check if no fuse has blown or breaker has worked. Change the
fuse or reset the breaker if necessary.
2 If the system goes into fan only operation, but as soon as it
goes into heating or cooling operation, the system stops
■ Check if air inlet or outlet of outdoor or indoor unit is not blocked
by obstacles. Remove any obstacle and make it well-ventilated.
■ Check if the remote controller display shows " " (time to
clean the air filter). (Refer to "Maintenance" in the indoor unit
manual.)
3 The system operates but cooling or heating is insufficient
■ Check if air inlet or outlet of outdoor or indoor unit is not blocked
by obstacles.
■ Remove any obstacle and make it well-ventilated.
■ Check if the air filter is not clogged. (Refer to "Maintenance" in
the indoor unit manual.)
■ Check the temperature setting.
■ Check the fan speed setting on your remote controller.
■ Check for open doors or windows. Shut doors and windows to
prevent wind from coming in.
■ Check if there are too many occupants in the room during
cooling operation
■ Check if the heat source of the room is excessive.
■ Check if direct sunlight enters the room. Use curtains or blinds.
■ Check if the air flow angle is proper.
If after checking all above items, it is impossible to fix the problem
yourself, contact your dealer and state the symptoms, the complete
model name of the air conditioner (with manufacturing number if
possible) and the installation date (possibly listed on the warranty card).
12. AFTER-SALES SERVICE AND WARRANTY
Warranty period
■ This product includes a warranty card that was filled out by the
dealer at the time of installation. The completed card was
checked by the customer and stored carefully.
■ If repairs to the air conditioner are necessary within the warranty
period, contact your dealer and keep the warranty card at hand.
12.1. After-sales service
■ Recommendations for maintenance and inspection
Since dust collects when using the unit for several years,
performance of the unit will deteriorate to some extent.
As taking apart and cleaning interiors of units requires technical
expertise and in order to ensure the best possible maintenance
of your units, we recommend to enter into a maintenance and
inspection contract on top of normal maintenance activities.
Our network of dealers has access to a permanent stock of
essential components in order to keep your air conditioner in
operation as long as possible.
Contact your dealer for more information.
■ When asking your dealer for an intervention, always state:
• the complete model name of the air conditioner
• the manufacturing number (stated on the nameplate of the
unit)
• the installation date
• the symptoms or malfunction, and details of the defect.
WARNING
Stop operation and shut off the power if anything
unusual occurs (burning smells, etc.)
Leaving the unit running under such circumstances may
cause breakage, electric shock or fire.
Contact your dealer.
1 Inspection display
2 Indoor unit number in which a malfunction occurs
3 Operation lamp
4 Malfunction code
TEST
4PW40727-1A Page 7 Thursday, October 11, 2007 11:02 AM
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