Panasonic S-18PU3HB, Operating Instructions Manual, Page: 22 / 28

22
Troubleshooting
The following symptoms do not indicate malfunction.
Symptom Cause
The indicator LED blinks and the system is not turn
on or respond to remote controller immediately after
power on.
*Please wait a moment (5min/15sec) after power on
the system.
• For new product fi rst time power on after installation, the system
requires approximately 5 minutes for “System Auto con fi guration
Process”.
• For subsequent operation start up by power switch, the system
requires 15secs for “Program Initialization”.
TIMER indicator is always ON. • When Timer has been set, the Timer setting repeats daily.
Operation is delayed a few minutes after restarting. • The delay is a protection to the unit’s compressor.
Indoor fan stops occasionally during heating operation. • To avoid unintended cooling effect.
Fan operation continues after unit is turn off.
• It is normal when the internal cleaning is in operation for
approximately 75 minutes.
Operation starts after power resumes. • Auto restart is in function and operates under previous setting.
Air fl ow continues even after operation has stopped. • To extract the remaining heat from the indoor unit (maximum 30
seconds).
The room has a peculiar odour. • This may be due to damp smell emitted by the wall, carpet,
furniture or clothing.
Cracking sound during operation. • Changes in temperature caused the unit to expand and contract.
Water fl owing sound during operation. • Refrigerant fl ow inside the unit.
Mist emerges from indoor unit. • During cooling operation, the discharged cold air may condense
to water vapour.
Outdoor unit emits water or steam. • During cooling operation, condensation occurs on cold pipes and
the condensed water may drip from the outdoor unit.
• During heating operation, frost formed on the outdoor unit during
deice cycle melts and is discharged as water or steam.
Unit switch to FAN operation and air become humid. • This happens when the room temperature reaches the set
temperature, operation switches to FAN mode and the humidity
increase.
During dry mode, cold air blow out. • The unit is running cooling operation with low fan speed to
dehumidify the room.
Discoloration of some plastic parts. • Discoloration is subjected to the types of materials used in plastic
parts. It is accelerated when exposed to heat, sun light, UV light
or environmental factors.
Soft buzzing sound from indoor unit during nanoe™X
operation.
• It is normal when the nanoe™X generator is working. If you are
concerned about the sound, cancel the nanoe™X operation.
Check the following before calling for servicing.
Symptom Check
Operation in HEAT/COOL mode is not working
ef fi ciently.
• Set the temperature correctly.
• Close all doors and windows.
• Clean or replace the fi lters.
• Clear any obstruction at the air inlet and air outlet vents.
Noisy during operation. • Check if the unit has been installed at an incline.
• Close the intake grille properly.
Remote control does not work.
(Display is dim or transmission signal is weak.)
• Insert the batteries correctly.
• Replace weak batteries.
The unit does not work. • Check if the circuit breaker is tripped.
• Check if timers have been set.
The unit does not receive the signal from the remote
control.
• Make sure the receiver is not obstructed.
• Make sure the address is set correctly.
• Make sure the remote control signal transmission is within the
range.
• Certain fl uorescent lights may interfere with the signal transmitter.
Consult an authorised dealer.