Black & Decker MUZ-FD09NA- U1, MUZ-FD12NA- U1 service manual Part name

10-4. TROUBLE CRITERION OF MAIN PARTS MUZ-FD09NAMUZ-FD12NA

Part name

Check method and criterion

Figure

Defrost thermistor

(RT61)

Ambient temperature

Measure the resistance with a tester.

thermistor (RT65)

Refer to 10-6. “Test point diagram and voltage”,1. “Inverter P.C.

Outdoor heat ex-

board”, the chart of thermistor.

changer temperature

thermistor (RT68)

Discharge tem-

Measure the resistance with a tester. Before measurement, hold the

perature thermistor

thermistor with your hands to warm it up.

(RT62)

Fin temperature

Refer to 10-6. “Test point diagram and voltage”,1. “Inverter P.C.

board”, the chart of thermistor.

thermistor (RT64)

Measure the resistance between terminals using a tester.

WHT

RED BLK

(Winding temperature : -4 ~ 104 °F (-20 ~ 40 °C))

2

3

1

Compressor

Normal

W

U-V

U-W

1.52 ~ 2.17 Ω

V

U

V-W

Measure the resistance between lead wires using a tester.

(Part temperature : 14 ~ 104 °F (-10 ~ 40 °C))

WHT

RED BLK

2

3

1

Outdoor fan motor

Color of lead wire

Normal

W

RED – BLK

BLK – WHT

11 ~ 16 Ω

V

U

WHT – RED

Measure the resistance using a tester.

(Part temperature : 14 ~ 104 °F (-10 ~ 40 °C))

R. V. coil (21S4)

Normal

970 ~ 1380 Ω

Measure the resistance using a tester.

(Part temperature : 14 ~ 104 °F (-10 ~ 40 °C))

WHT

RED

LEV

Expansion valve coil

Color of lead wire

Normal

ORN

WHT – RED

(LEV)

RED – ORN

37 ~ 54 Ω

YLW

BRN

BLU

YLW – BRN

BRN – BLU

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