42
11-4-8. Fuse
●
Check for continuity by observation or with a tester.
11-4-9. Compressor
●
Check for bad connections, short circuit or insulation failure of the compressor windings.
11-4-10. HIC
It should be checked in the following sequence:
Procedure
(1) Disc, –, U, V and W terminals.
(2) Using an analog tester (set to
´
100 range), measure the resistance between terminals in the following table.
HIC Terminal
Tester bar
+
Tester bar
Resistance
–
+
+
–
V
around 500 – 1,000
½
°
°
around 500 – 1,000
½
U
W
V
U
W
V
U
W
V
U
W
–
●
Use
´
100 range of circuit tester to confirm approximate values between 500 and 1,000 ohms. The HIC
can be judged normal if U, V and W all show the same resistance.
NOTE
11-4-11. Diode Module
●
Check each diode of the diode module separately.
Polarity of tester
1
2
3
1
4
1
4
2
3
2
3
4
Resistance
10
½
– 100
½
10
½
– 100
½
°
10
½
– 100
½
°
10
½
– 100
½
°
°
+
+
~
~
+
–
1
1
2
3
4
3
2
4
11-4-12. Outdoor Fan Motor
Gently rotate the fan by hand.
●
If the fan rotates easily:
a. Check for problems with motor-run capacitor, which is located on the Control PCB in Outdoor Unit.
b. Check for bad connections to the fan motor winding.
c. Measure the voltage across the outdoor fan motor terminals in the AC range with a tester. If the tester indi-
cates voltage is present, the fan motor is in normal condition.
●
If the fan will not rotate at all:
a. Check if an obstruction is touching the fan, or if the fan itself is making contact with the outer frame.
b. If the above yields no problem, the bearings in the fan motor may have overheated and become damaged.
Replace the fan motor as a whole.
