Sharp AF-T908X

24
AF-T908X
AF-R908X
AF-R1108X
AF-R1208X
TROUBLESHOOTING GUIDE
TROUBLESHOOTING GUIDE
Neither fan motor
nor compressor
operate
In sufficient cooling
No cooling
1) Check power supply
switch or plug and
measure the voltage
1) Set temperature
1) Fuse open or circuit breaker
open
1) If fuse or breaker are
normal, ask the power
supply company for
check.
2) Plug disconnected
3) Plug connected properly but
contact defective
2) Connect properly.
1) The set temperature high
3) Change power supply
cord with plug.
1) Down set temperature
2) Change compressor
2) Outside air too high temp.
1) Equipment defective if no temp. 
difference
3) Air conditioner normal but heat
load excessive
1) Change or repair defect
2) Improve ventilation,
avoid sunshine
3) Calculate cooling load
and change or remove
heat source
1) Change capillary tube
2) Check for gas leak and
repair, recharge
1) Capillary tube restricted
2) Gas leak
1) Gas leak
2) Compressor defective
2) Check if temp.
difference between
inlet and outlet air
of indoor unit is over
14˚F
1) No temperature
difference
between discharge
pipe and suction
pipe of compressor
3) Check indoor
exchanger inlet/
outlet piping temp.
Sweat is less than
half of coil or frost
sticks to capillary
tube
2) Check air filter
Air filter clogged Clean
3) Check for a high heat source
5) Undersized unit
4) Check doors and windows
6) Check if condenser and evaporator are clean
7) Check if any object is restricting heat radiation from
the condenser
8) Sealed system
Remove the added heat
source
Windows and doors must
be kept closed
Calculate heat load
Clean them with steam
cleaner or another method
Remove the object or move
the air conditioner
Check sealed system
1) Repair gas leak
Symptom Check Defect Remedy
4) PWB ass'y fuse open. 4) Change fuse.
2) Check thermistor
(Refer to page 27)
1) Change thermistor