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SOPHIA
TROUBLESHOOTING
M
DUCTLESS INVERTER
SPLIT AIR CONDITIONER
WITH HEAT PUMP
WALL MOUNTED TYPE
UL
TI-ZONE
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Troubleshooting
SAFETY PRECAUTIONS
If ANY of the following conditions occurs, turn o your unit immediately!
• The power cord is damaged or abnormally warm
• You smell a burning odor
• The unit emits loud or abnormal sounds
• A power fuse blows or the circuit breaker frequently trips
• Water or other objects fall into or out of the unit
DO NOT ATTEMPT TO FIX THESE YOURSELF! CONTACT AN AUTHORIZED SERVICE PROVIDER
IMMEDIATELY!
Common Issues
The following problems are not a malfunction and in most situations will not require repairs:
Issue Possible Causes
The unit does not
turn on when you
press the ON/OFF
button
The unit has a 3-minute protection feature that prevents the
unit from overloading. The unit cannot be restarted within
three minutes of being turned o.
The unit changes
from COOL/HEAT
mode to FAN
mode
The indoor unit
emits a white mist
Both the indoor
and outdoor units
emit a white mist
The unit may change its setting to prevent frost from forming
on the unit. Once the temperature increases, the unit will start
operating in the previously selected mode again.
The set temperature has been reached, at which point the
unit turns o the compressor. The unit will continue operating
when the temperature fluctuates again.
In humid regions, a large temperature dierence between the
room’s air and the conditioned air can cause a white mist.
When the unit restarts in HEAT mode after defrosting, a white
mist may be emitted due to moisture generated from the
defrosting process.
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Issue Possible Causes
A rushing air sound may occur when the louver resets its
position.
The indoor unit
makes noises
Due to expansion and contraction of the unit's plastic parts, a
squeaking sound may occur after the unit is run in HEAT mode.
Low hissing sound during operation: This is normal and is
caused by refrigerant gas flowing through both the indoor and
outdoor units.
Both the indoor
and outdoor units
make noises
The outdoor unit
makes noises
Dust is emitted
from either the
indoor or outdoor
unit
The unit emits a
bad odor
The fan of the
outdoor unit does
not operate
Low hissing sound when the system starts, has just stopped
running, or is defrosting: This is normal and is caused by
the refrigerant gas stopping or changing direction.
Squeaking sound: Normal expansion and contraction of
plastic and metal parts caused by temperature changes during
operation can cause squeaking noises.
The unit will make dierent sounds based on its current
operating mode.
The unit may accumulate dust during extended periods of
non-use, which will be emitted when the unit is turned on.
This can be mitigated by covering the unit during long periods
of inactivity.
The unit may absorb odors from the environment (such as
furniture, cooking, cigarettes, etc.) which will be emitted
during operation.
The unit’s filters have become moldy and should be cleaned.
During operation, the fan speed is controlled to optimize
product operation.
Operation is
erratic or
unpredictable or
the unit is
unresponsive
Interference from cell phone towers and remote boosters may
cause the unit to malfunction.
In this case, try the following:
• Disconnect the power, then reconnect.
• Press the ON/OFF button on the remote control to restart operation.
NOTE: If the problem persists, contact a local dealer or your nearest customer service center.
Provide them with a detailed description of the unit malfunction, as well as, your model number.
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Troubleshooting
When troubles occur, please check the following points before contacting a repair company.
Issue Possible Causes Solution
The temperature setting may
be higher than ambient
room temperature.
The heat exchanger on the
indoor or outdoor unit is
dirty.
Lower the temperature setting.
Clean the aected heat exchanger.
Poor cooling
performance
The air lter is dirty.
The air inlet or outlet of
either unit is blocked.
Doors and windows are
open.
Excessive heat is generated
by sunlight.
Too many sources of
heat are in the room
(people, computers,
electronics, etc.)
Refrigerant is low due to a
leak or long-term use.
The SILENCE function is
activated.
Remove the filter and clean it
according to the instructions.
Turn the unit o, remove the obstruction,
and turn the unit back on.
Make sure that all doors and
windows are closed while the unit is
operating.
Close windows and curtains
during periods of high heat or
bright sunshine.
Reduce the amount of heat sources.
Check for leaks, re-seal if
necessary, and top o refrigerant.
The SILENCE function can lower
product performance by reducing
operating frequency. Turn o the
SILENCE function.
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Issue Possible Causes Solution
The unit is not
working
The unit starts and
stops frequently
There is a power failure.
The power is turned o. Turn on the power.
The fuse is burned out. Replace the fuse.
The remote control batteries are
dead.
The unit’s 3-minute protection
has been activated.
The timer is activated. Turn the timer o.
There’s too much or too little
refrigerant in the system.
Incompressible gas or
moisture has entered the
system.
The compressor is broken. Replace the compressor.
The voltage is too high or too
low.
Wait for the power to be
restored.
Replace the batteries.
Wait 3 minutes after
restarting the unit.
Check for leaks and
recharge the system with
refrigerant.
Evacuate and recharge the
system with refrigerant.
Install a manostat to
regulate the voltage.
Poor heating
performance
Indicator lamps
continue flashing
An error code appears
in the window display
of the indoor unit:
• E0, E1, E2…
• P1, P2, P3…
• F1, F2, F3…
The outdoor temperature is
lower than 44.5°F (7°C).
Cold air is entering through
doors and windows.
Refrigerant is low due to a leak
or long-term use.
The unit may stop operation or continue to run safely. If
the indicator lamps continue to flash or error codes appear,
wait for about 10 minutes. The problem may resolve itself.
If not, disconnect the power, then connect it again. Turn
the unit on.
If the problem persists, disconnect the power and contact
your nearest customer service center.
Use an auxiliary heating
device.
Make sure that all doors
and windows are closed
during use.
Check for leaks, re-seal
if necessary, and top o
refrigerant.
NOTE: If your problem persists after performing the checks and diagnostics above, turn o your
unit immediately and contact an authorized service center.
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