User's Manual

SM830043
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4
4. Service procedures
Fig. 47
Multimeter
Fan motor
Capacitor
0643_X_S
(3) Checking the Electrical Parts
1 Power transformer (TR1) ................. Indoor unit *Measure the coil resistance.
Primary 220-240 V ; Measure the resistance between two WHT lead wire
terminals of socket connected to power transformer.
Secondary 10.6V ; Measure the resistance between two BRN lead wires.
Refer to “1–3–(A) Other component specifications”.
2 Indoor fan motor (FMI) ............... Indoor unit *Measure the coil resistance.
Measure the resistance between each terminal of the socket connected to
the indoor fan motor.
Refer to “1–2–(A) Major component specifications”.
3 Outdoor fan motor (FMO) ........... Outdoor unit *Measure the coil resistance.
Measure the resistance in the same manner as explained above 2.
Refer to “1–2–(B) Major component specifications”.
4 Fan motor capacitor ............ Both in indoor and outdoor unit
Remove the lead wires from the capacitor terminals,
and then place a probe on the capacitor terminals as
shown in Fig. 47. Observe the deflection of the pointer,
setting the resistance measuring range of the multimeter
to the maximum value.
The capacitor is “acceptable” if the pointer bounces to a
great extent and then gradually returns to its original
position.
NOTE
The range of deflection and the deflection time differ according to
the capacity of the capacitor.