11
2
Indoor unit, outdoor unit
• A continuous low hissing sound is heard
when the system is in cooling or defrost
operation. This is the sound of refrigerant
gas flowing through both indoor and outdoor
units.
• A hissing sound which is heard at the start
or immediately after stopping operation or
defrost operation. This is the noise of
refrigerant caused by flow stop or flow
change.
3
Outdoor unit
• When the tone of operating noise changes.
This noise is caused by the change of
frequency.
9.6
Dust comes out of the unit
• When the unit is used for the first time in a
long time.
This is because dust has gotten into the unit.
9.7
The units can give off odours
• The unit can absorb the smell of rooms,
furniture, cigarettes, etc., and then emit it again.
9.8
The outdoor unit fan does not
operate. But compressor still running
• The speed of the fan is controlled in order to
optimise product operation.
9.9
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.
9.10
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.
9.11
Does not cool very well
• Program dry operation.
Program dry operation is designed to lower the
room temperature as little as possible refer to
“
6.2 Program dry operation
”
10.
Troubleshooting
If one of the following malfunctions occur, take the
measures shown below and contact your dealer.
WARNING
Stop operation and turn 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.
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 remote controller display “
”
indicates the unit number, the operation lamp
flashes and the malfunction code appears.
Measure: Notify your installer 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. If it is impossible to fix
the problem yourself after checking all the
above items, contact your dealer.
Let him know the symptoms, system name,
and model name (listed on the warranty card).
1
If the system does not operate at all:
• Check if there is no power failure.
Wait unit 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.
• Turn the power on with
the breaker switch in
the off position.
Do not turn the power
on with the breaker
switch in the trip
position.
(Contact your dealer.)
ON
OFF
Switch
Breaker
Trip position
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