22
Sp
ec
ific
at
io
ns
s
ub
je
ct
to
c
ha
ng
e
w
ith
ou
t n
ot
ice
.
S
G
-3
8M
PR
A-
02
ERROR DIAGNOSIS AND TROUBLESHOOTING WITHOUT ERROR CODE
Table 18 — Remote Maintenance
Remote
Maintenance
Electrical Circuit
Refrigerant Circuit
Others
Possible causes
of trouble
Power failure The main
power tripped
Loose
connections
Faulty
transformer
The voltage is
too high or
too low
The remote
control is
powered off
Broken
remote
control
Dirty
air filter
Dirty
condenser
fins
The setting
temp is
higher/lower
than the
room's
(cooling/
heating)
The ambient
temp. is too
high/low when
the mode is
cooling/
heating
Fan mode
SILENCE
function is
activated
(optional
function)
Frosting and
defrosting
frequently
Heavy load
condition
Loose hold
down bolts
and/or screws
Not air tight
Air inlet or
outlet of either
unit is blocked
Interference
from cell
phones
towers and
remote
boosters
Shipping
plates
remained
attached
Unit will not start
☆
☆
☆
☆
Operation is
erratic,
unpredictable or
unit is
unresponsive
☆
Cannot set
desired temp.
☆
☆
Unit is on
but the wind is
not cold (hot)
☆
☆
☆
Unit runs, but
shortly stops
☆
☆
☆
The unit starts up
and stops often
☆
☆
☆
☆
Unit runs
continuously
however
insufficient
cooling
(heating)
☆
☆
☆
☆
☆
☆
☆
☆
Cool can not
change to heat
Unit is noisy
☆
☆
Unit emits
bad odor
☆
Test method/
remedy
Test voltage Close the
power switch
Inspect
connections
- tighten
Change the
transformer Test voltage
Replace the
battery of the
remote control
Replace
remote
control
Clean
or
replace
Clean
Adjust the
setting temp.
Turn the
AC later
Adjust to
Cool mode
Turn off
SILENCE
function.
Turn the
AC later
Check the
heat load
Tighten bolts
or screws
Close all
windows and
doors
Remove the
obstacles
Reconnect the
power or
press ON/
OFF button on
remote control
to restart
Remove
them
UNIT DAMAGE HAZARD
Be sure to turn off unit before any maintenance to prevent damage or
injury.
WARNING
