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SM830043
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4
4. Service procedures
4-2 A Sensor is Defective.
11
11
1 Indoor (heat exchanger) coil temp. Sensor is defective.
(a) Open (=No continuity in sensor)
Compressor and outdoor fan repeat ON for 10 minutes and OFF for 6 minutes
when sensor opens.
(b) Short
“Freeze Prevention” does not operate when dehumidified water is frozen on the
indoor coil.
22
22
2 Room temp. Sensor (in the remote control unit) is defective.
(a) Open (=No continuity in sensor)
Neither outdoor fan nor compressor runs.
(b) Short
Outdoor fan and compressor do not stop. — Excessive cooling.
4-3 Operation of Major Electrical Parts
(Function)
Operation
Indoor unit and Remote Control unit
Oudoor unit
Freeze prevention
Manual
Energy
saver
Night
setback
Timer
(set)
Fan
Operation Mode
Sweep
Stop
Indicator lamps
Thermo. ON ⅜⅜ ⅜⅜ ⅜
Thermo. OFF ⅜⅜ ⅜
Thermo. ON ⅜⅜ ⅜ ⅜⅜ ⅜
Thermo. OFF ⅜⅜ ⅜
Thermo. ON ⅜⅜ ⅜ ⅜⅜ ⅜
Thermo. OFF ⅜⅜ ⅜
ON Timer ⅜
OFF Timer ⅜⅜⅜ ⅜⅜ ⅜
⅜⅜ ⅜
⅜⅜
Cool ⅜⅜* ⅜* ⅜⅜* ⅜*
Fan ⅜⅜
Cool ⅜⅜* ⅜* ⅜⅜* ⅜*
Fan ⅜⅜
NOTE ⅜* Refer to Cooling Mode.
Cool
Timer
Sweep
Cool
-ing
Fan
Flap
Night setback
Energy saver
Room
Temp.
Fan Compressor