Black & Decker MUZ-FD09NA, MUZ-FD12NA Test Point Diagram and Voltage, Inverter P.C. board

10-6. TEST POINT DIAGRAM AND VOLTAGE

1. Inverter P.C. board

MUZ-FD09NA

Back side of unit

AC 208 / 230 V

Fuse(F901) 250 V 3.15 A

Output to drive com- pressor (LDU, LDV, LDW)

MUZ-FD12NA

		Smoothing	Smoothing		Smoothing
DB61		capacitor	capacitor		capacitor	Fuse(F701)
DC260 ~300 V		(C63)	(C62)		(C61)	250 V 3.15 A
(-)	(+)
				Fuse(F801)
				250 V 3.15 A

R.V.coil

(CN721)

208 / 230 VAC

AC208/230 V

Front side of unit

Output to drive outdoor fan motor (CN932) Fin temperature thermistor /RT64 (CN642) Outdoor heat exchanger temperature thermistor /RT68(CN644) Ambient temperature thermistor /RT65 (CN643) Defrost thermistor /RT61(CN641) Discharge temperature thermistor /RT62 (CN641)

LEV
	Jumper wire for
connector	changing defrost
(CN724)	setting (JS)

Jumper wire for pre-heat control setting (JK)

Resistance(kΩ)

Defrost thermistor(RT61)

Ambient temperature thermistor(RT65)

Outdoor heat exchanger temperature thermistor(RT68)

100
90
80								700	Discharge temperature thermistor(RT62)
70
								600
60							Resistance(kΩ)
20								200
50								500
40								400
30								300
10								100
0								0
	14	32	50	68	86	104
-4								32	50	68	86	104	122	140	158	176	194	212	230	248

Temperature(°F) Temperature(°F)

Resistance(kΩ)

Fin temperature thermistor(RT64)

200

180

160

140

120

100

80

60

40

20

0

3250 68 86 104 122 140 158 176

Temperature(°F)

31