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
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