– 40 –
SM830079
11. SERVICE PROCEDURES
(2)
A Sensor is Defective
1
1
1
1
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.
2
2
2
2
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.
(3)
Operation of Major Electrical Parts
Oudoor unit
Fan Compressor
Manual
Thermo.ON
V
V
V
V
V
Thermo.OFF
V
V
V
Night
Thermo.ON
V
V
V
V
V
V
setback
Thermo.OFF
V
V
V
Timaer
ON Timer
V
(set)
OFF Timer
V
V
V
V
V
V
Freeze prevention
V
V
V
V
V
Sweep
Cool
V
V
*
V
*
V
V
*
V
*
Fan
V
V
Stop
Cool
V
V
*
V
*
V
V
*
V
*
Fan
V
V
NOTE
V
* Refer to Cooling Mode.
Indicator lamps
Cool
Room
Temp.
(Function)
Operation Mode
Operation
Indoor unit and Remote Control unit
Sweep
Fan
Night setback
Energy saver
Timer
Cool
-ing
Fan
Flap
