Troubleshooting; Symptoms That Are Not System Malfunctions; Symptom: The System Does Not Operate; Symptom: The Fan Strength Does Not Correspond To The Setting - Daikin FCAG35AVEB Installation And Operation Manual

13 Troubleshooting

13 Troubleshooting
If one of the following malfunctions occur, take the measures shown
below and contact your dealer.
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.
The system must be repaired by a qualified service person:
Malfunction
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.
If water leaks from the unit.
The operation switch does not work
well.
If the user interface display indicates the
unit number, the operation lamp flashes
and the malfunction code appears.
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.
Malfunction
If the system does not ▪ Check if there is no power failure. Wait
operate at all. until power is restored. If power failure
occurs during operation, the system
automatically restarts immediately after
power is restored.
▪ Check if no fuse has blown or breaker is
activated. Change the fuse or reset the
breaker if necessary.
The system operates ▪ Check if air inlet or outlet of outdoor or
but cooling or heating indoor unit is not blocked by obstacles.
is insufficient. Remove any obstacles and make sure
the air can flow freely.
▪ Check if the air filter is not clogged (see
"12.1.1 To clean the air filter" on
page 16).
▪ Check the temperature setting.
▪ Check the fan speed setting on your user
interface.
▪ Check for open doors or windows. Close
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 installer and state the symptoms, the complete
model name of the unit (with manufacturing number if possible) and
the installation date (possibly listed on the warranty card).
Installation and operation manual
18
13.1
The following symptoms are NOT system malfunctions:
13.1.1
▪ The air conditioner does not start immediately after the ON/OFF
button on the user interface is pressed. If the operation lamp
lights, the system is in normal condition. To prevent overloading of
the compressor motor, the air conditioner starts 5 minutes after it
is turned ON again in case it was turned OFF just before. The
same starting delay occurs after the operation mode selector
Measure
button was used.
Turn off the main power
▪ If "Under Centralized Control" is displayed on the user interface,
switch.
pressing the operation button causes the display to blink for a few
seconds. The blinking display indicates that the user interface
cannot be used.
Stop the operation.
▪ The system does not start immediately after the power supply is
Turn off the power.
turned on. Wait one minute until the micro computer is prepared
for operation.
Notify your installer and
report the malfunction
13.1.2
code.
The fan speed does not change even if the fan speed adjustment
button in pressed. During heating operation, when the room
temperature reaches the set temperature, the outdoor unit goes off
and the indoor unit changes to whisper fan speed. This is to prevent
cold air blowing directly on occupants of the room. The fan speed
Measure
will not change if the button is pressed.
13.1.3
The fan direction does not correspond with the user interface
display. The fan direction does not swing. This is because the unit is
being controlled by the micro computer.
13.1.4
▪ When humidity is high during cooling operation. If the interior of an
indoor unit is extremely contaminated, the temperature distribution
inside a room becomes uneven. It is necessary to clean the
interior of the indoor unit. Ask your dealer for details on cleaning
the unit. This operation requires a qualified service person.
▪ Immediately after the cooling operation stops and if the room
temperature and humidity are low. This is because warm
refrigerant gas flows back into the indoor unit and generates
steam.
13.1.5
When the system is changed over to heating operation after defrost
operation. Moisture generated by defrost becomes steam and is
exhausted.
13.1.6
This is because the user interface is intercepting noise from electric
appliances other than the air conditioner. The noise prevents
communication between the units, causing them to stop. Operation
automatically restarts when the noise ceases.
Symptoms that are NOT system
malfunctions

Symptom: The system does not operate

Symptom: The fan strength does not
correspond to the setting
Symptom: The fan direction does not
correspond to the setting
Symptom: White mist comes out of a unit
(Indoor unit)
Symptom: White mist comes out of a unit
(Indoor unit, outdoor unit)
Symptom: The user interface display
reads "U4" or "U5" and stops, but then
restarts after a few minutes
Split system air conditioners
4P471224-1 – 2017.03
FCAG35~140AVEB