6 720 862 440 (2016/04) Heat Pump Mini VRF Outdoor Unit
10 | TROUBLESHOOTING
7.2 Problems and causes for the remote controller
Before asking for servicing or repairing, check the following points.
(See in Table 7-2)
Table 7-2
Symptoms
Causes Solution
The fan speed can not be
changed.
• Check whether the MODE indicated on the display
is „AUTO“
When automatic mode is selected, the air conditioning
unit will automatically change the fan speed.
• Check whether the MODE indicated on the display
is „DRY“
When dry operation is selected, the air conditioning unit
automatically changes the fan speed. The fan speed can
be selected during „COOL“, „FAN ONLY“, and „HEAT“.
The remote controller signal is
not transmitted even when the
ON/OFF button is pushed.
• Check whether the batteries in the remote
controller need changing.
The power supply is off.
The TEMP. indicator does not
come on.
• Check whether the MODE indicated on the display
is FAN ONLY.
The temperature cannot be set during FAN mode.
The indication on the display
disappears after time.
• Check whether the timer operation has come to
an end and TIMER OFF is not indicated on the
display.
The air conditioning units operation will stop at it‘s set
time.
The TIMER ON indicator goes
off after time.
• Check whether the timer operation has started
and TIMER ON is indicated in the display.
Up to the set time, the air conditioning unit will
automatically start and the appropriate indicator will go
off.
No receiving tone sounds from
the indoor unit even when the
ON/OFF button is pressed.
• Check whether the signal transmitter on the
remote controller is properly directed to the
infrared signal receiver on the indoor unit when
the ON/OFF button is pressed.
Directly point the remote controller at the units receiver
and press the on/off button several times.
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