Mitsubishi Electronics MUZ-GB50VA service manual Discharge temperature thermistor RT62

10-7. Test point diagram and voltage

1. Outdoor electronic control P.C. board

MUZ-GB50VA

Resistance (k')

Discharge temperature thermistor (RT62)

700

600
500
400
300													(Dischargetemperaturethermistor(RT62) (Defrostthermistor(RT61)		AmbienttemperatureCN663(
						(CN932 20-90VAC				(5VDC	GND 5V			(
200														CN661
100
0														Outdoorheatexchanger temperaturethermistor(RT68)	thermistor(RT65)
						(CN931 pulsewave Tofan motor
0	10	20	30	40	50	60	70	80	90	100	110	120

Temperature (;)

Defrost thermistor (RT61)

Ambient temperature thermistor (RT65)

Fin temperature thermistor (RT64) Outdoor heat exchanger temperature thermistor (RT68)

	200												100
	180												90
(k")	160											(k")
													80
	140
Resistance												Resistance
													70
	120
	100												60
	80												50
	60
													40
	40
													30
	20
	0												20
		10	20	30	40	50	60		70	80
	0
			Temperature (°C)										10
CN701 ((+) (–) 5V DC pulsewave		15V CN702 15V Signal ((–)reception (From powerGNDboard) 5V DC pulsewave (+)					GND(powerboard)		(+) R.V.coil(–) Rushcurrentrelay(–)				0
												12V ((DC (–) pulsewave ((+)
(To power board)	Signal transmission										CN781		LEV		CN795
								( 12V DC					-20	-10 0 10 20 30 40
															Temperature (°C)

LED 1

LED 2

CN801

325V DC

~

370V DC

Input

F801

FUSE

3.15A/250V

(

CN601

230V AC Input

(

Serial signal Room A

5~10V DC

31