SLIM DUCT B SERIES
OWNERS MANUAL - INDOOR UNIT
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WARNING
When the following occurs, turn the unit off and
disconnect power immediately, contact your
installing contractor or a licensed HVAC technician.
• Power supply wiring is overheating or damaged.
• There’s abnormal sound during operation.
• Circuit breaker trips off frequently.
• Air conditioner gives off burning smell.
• Indoor unit is leaking.
Do not try to service or repair the unit yourself.
If the unit operates abnormally it may cause
internal or external damage, electric shock or
become a fire hazard.
TROUBLESHOOTING
General problem analysis
Please check below items before asking for maintenance.
If the problem still can’t be eliminated, please contact
local dealer or qualified professionals.
Problem
Check items
Solution
Indoor unit
isn’t receiving
the remote
controller
signal.
Interference from static
electricity
Disconnect power at breaker for 3
minutes.
Is the remote co ntroller within
the signal receiving range?
Signal receiving range is 26 ft.
Are there any obstacles?
The remote needs to have a clear
path to the indoor unit receiver.
Is the remote co ntroller pointing
at the receiving window?
Select proper angle and point the
remote controller at the rece iving
window on indoor unit.
Is sensitivity of rem ote
controller low; fuzzy display
or no display?
Check the batteries.
If the power of batteries is too low,
please rep lace them.
No display when op erating
remote cont roller?
Check whether rem ote controller
appears to be damaged. If yes,
replace it.
Electronic Interference?
Take the remote con troller close
to indoor unit. Turn off other
electronics and then try it again.
No air coming
from indoor
unit
Air inlet or air outlet of indoor
unit is blocked?
Eliminate obstacles.
In the HEAT mode, has the
indoor temperature reached
the set temperature?
After reaching set temperature, the
indoor fan will stop.
You just turned on the HEAT
mode.
In order to prevent cold air from
blowing out it may take several
minutes before the fan starts. This
is normal.
Air
conditioner
isn’t coming
on
Power failure?
Wait until power recovery.
Loose wiring?
Contact your contractor or an
electrician.
Circuit breaker has tripped or
fuse is burnt out?
Ask professional to replace circuit
breaker or fuse.
Wiring is overheating or
needs repair.
Ask professional to replace it.
Unit has restarted
immediately after stopping
operation?
Turn the unit off, wait 3 minutes
then turn it back on.
Does the remote controller
show the correct setting?
Reset the function.
Mist coming
from indoor
unit’s air
outlet
Indoor temperature and
humidity is high?
Happens when the indoor air
is cooled rapidly. After a while,
indoor temperature and hu midity
will be decrease and mist will
disappear.
Problem
Check items
Solution
Strange
smells?
Look for the source of
the odor; rugs, furniture,
cigarettes, etc.
Eliminate the odor source. Clean
the filter.
Can’t adjust
the “Set”
temperature
Your required temp erature
exceeds the set temperature
range?
Set temperature range: 16°C~30°C
(61°F~86°F).
Cooling /
Heating
is insufficient.
Voltage is too low?
May require calling an HVAC
technician.
Filter is dirty?
Clean the filter.
Set temperature is in proper
range?
Adjust temperature to proper
range.
Door and window are open?
Close door and window.
Air
conditioner
operates
abnormally
Is there inte rference, such as
lightning, wireless devices,
etc.
Disconnect power, put back power,
and then turn on the unit again.
“Water
flowing”
noise
The unit has just been turned
on or off.
The noise is the sound of
refrigerant flowing inside the unit,
which is a normal.
Cracking
noise
The unit has just been turned
on or off.
This is the sound of friction caused
by expansion and/or contraction
of panel or other parts due to
temperature changes.
Air guide
louver can’t
be closed
normally
Did you try to adjust the air
guide louver manually?
Did it stick during normal
operation?
Disconnect the power for 3s and
then connect the power; if the
problem still exits, call an HVAC
technician to resolve.
