Friedrich AS - W126BMS0, Service Manual

Page: 27 / 72

Part 4 Trouble Shooting
- 27 -
Temperature difference between intake and discharge air depends on room air humidity. When the room air
humidity is relatively higher, temperature difference is smaller. When the room air humidity is relatively lower tem-
perature difference is larger.
NOTICE
Problem Possible causes Corrective action Error Code
The air condi-
tioner stops
during opera-
tion.
• The connection of the indoor and
outdoor units has a problem.
• Conduct the wiring and piping error
check.
05, 09, 53
• The thermistor recognition has a
defect.
• Check that the thermistor have been
separated from the pipe holder.
09, 32, 41,
45
• The electronic expansion valve
operates incompletely.
• Check the temperature of the connection
pipe.
44, 61, 65
Indoor unit is
still operating
even when the
power is being
turned off.
• Auto-Clean mode is being operat-
ed.
• This function is to remove the rest
of moisture indoor unit.
• Please, wait until the end of functions.
• It will be inhibit a fungal growth.
If you do not want this feature, you can
turn off to press.
67
Mist is dis-
charged from
the air outlet of
the indoor unit.
• The cooled air from the air condi-
tioner makes mist.
• When the room temperature is down,
this phenomenon will disappear.
01, 02, 06,
12
Water leaks
from the out-
door unit. • In the heating operations, con-
densed water drop from the heat
exchanger.
• This symptom need to install drain hose
under the base pan.
• Contact the installer.
Operating noise
or vibration.
• Clicking sound
Clicking sound can be heard either
when the unit starts or stops due to
movement of reversing valve.
• Creaking sound
The plastic parts of the indoor unit
make sound of shrinks and
expands due to a sudden tempera-
ture change.
• The water flowing sound, Blowing
sound
The flow of refrigerant through the
air conditioner is switching, noise
can be heard.
• These are normal symptoms.
• After a moment, it will be silent.
41, 45, 62
Operating noise
or vibration. • The installation condition is in trou-
ble.
• Adjust the position of the air conditioner
so that it can have enough space.
10, 26, 67
The indoor unit
gives out odor.
• The air smells bad because a
musty or cigarettes odor may be
absorbed into the indoor unit and
discharged with airflow.
• If the smell does not disappear, you
need to wash filter or heat exchanger.
• Contact the installer.