Mitsubishi Electronics MUZ-FD12NA- U1 Test Point Diagram and Voltage, Inverter P.C. board

Page 31

10-6. TEST POINT DIAGRAM AND VOLTAGE

1. Inverter P.C. board

MUZ-FD09NA MUZ-FD12NA

Back side of unit

AC 208/230 V

Fuse (F901) 250 V 3.15 A

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

Front side of unit

Output to drive outdoor fan motor (CN932)

			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
	R.V. coil
	(CN721)
	208/230 VAC

AC208/230 V

temperatureFin thermistor/RT64 (CN642)	heatOutdoorexchanger temperaturethermistor /RT68(CN644) temperatureAmbient thermistor/RT65 (CN643)	Defrostthermistor /RT61(CN641)	Dischargetemperature thermistor/RT62 (CN641)		Jumper wire
			LEV	Jumper wire for	Jumper wire
			connector	changing defrost	for pre-heat
			(CN724)	setting (JS)	control setting
					(JK)

Resistance(kΩ)

Defrost thermistor(RT61)

Ambient temperature thermistor(RT65)

Outdoor heat exchanger temperature thermistor(RT68)

100
100
90
90
80														700	Discharge temperature thermistor(RT62)
80

70
70														600
60													Ω)

														500
50

													Resistance(k
20													Resistance(k	200
40														400
30														300
10														100


0														0
0		14		32		50		68		86		104		0
-4		14		32		50		68		86		104		32	50		68		86		104		122		140		158		176		194		212		230		248
				Temperature(°F)																		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

Image 31

Contents MUZ-FD09NA MUZ-FD09NA- U1 MUZ-FD12NA MUZ-FD12NA- U1 Specification has been corrected Part Names and Functions Technical ChangesMUZ-FD09NA MUZ-FD12NA SpecificationOperating Range Test conditionRequired Space Outlines and DimensionsWiring Diagram Unitinch Refrigerant System DiagramData MUZ-FD12NA Performance Curve CoolingMUZ-FD09NA HeatingCondensing pressure Condensing Pressure Cooling65 70F MSZ-FD09NA MSZ-FD12NA Standard Operation DataTest RUN Operation How to operate fixed-frequency operation Relation Between Main Sensor and Actuator Actuator ControlOutdoor FAN Motor Control R.V. Coil ControlPRE-HEAT Control Setting Service FunctionsTroubleshooting Change in Defrost SettingFailure Mode Recall Function Operational procedure Outdoor unit failure mode table Troubleshooting Check Table Page BLK WHT WHT RED Trouble Criterion of Main Parts MUZ-FD09NAMUZ-FD12NACheck of compressor How to check inverter/compressorCheck of open phase Troubleshooting FlowCheck of compressor operation time Check of compressor windingCheck of compressor start failure Check of R.V. coil Unit operates Cool mode even if it is set to Heat modeUnit operates Heat mode even if it is set to Cool mode Check of outdoor thermistorsCheck of outdoor fan motor Check of power supplyCheck of LEV Expansion valve Emergency Operation Check of inverter P.C. boardHow to check miswiring and serial signal error Outdoor unit Electromagnetic noise enters into TV sets or radiosInverter P.C. board Test Point Diagram and VoltageRemoving the cabinet Photo Disassembly InstructionsRemoving R.V. coil Removing the inverter assembly, inverter P.C. board PhotoPhoto 4 Inverter assembly Photo Removing the discharge temperature thermistorRemoving the compressor and 4-way valve Removing outdoor fan motor PhotoPage Made in Japan

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MUZ-FD09NA- U1, MUZ-FD12NA- U1, MUZ-FD12NA, MUZ-FD09NA specifications

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