Sharp r-8580 manual Problem, Possible Cause, Test Procedure Or, Correction

R -8580

PROBLEM	POSSIBLE CAUSE	TEST PROCEDURE OR
		CORRECTION

CONVECTION

rCONV indicator light but oven does not go into a cook cycle when START pad is touched.

CONV indicator lights, but heating element does not heat.

Temperature in the oven cavity is lower or higher than preset.

Lower than preset temperature.

Cooling fan motor, turntable mo-

tor and oven lamp run intermitantly or all the time.

Convection cycle runs 3 minutes then shuts down.

SENSOR

Oven is in the sensor cooking condition but AH sensor does not end stage 1 or does not stop cooking cycle or the oven stops soon.

Defective

heater

relay(RY4)

on

relay

unit.

Procedure

N.

Defective

key

unit.

Procedure

P.

Defective

thermistor.

procedure

K.

Open

wiring

in

circuit to

above compo-

Check

and

repair

wiring.

nents.

Defective

convection

heater.

Procedure

J.

Defective

heater

relay(RY4)

on

relay

unit.

Procedure

N.

Defective

CPU

unit.

Procedure

0.

Open

or

loose

wire

connection

to

the

Check

and

repair

wiring.

above

components.

Defective

convection

heater.

Procedure

J.

Defective

CPU

unit.

Procedure

0.

Defective

convection

motor.

Replace

motor.

Defective

thermistor.

Procedure

K.

Defective

cooling

fan

motor.

Replace

fan motor.

Defective

dumper

motor.

Procedure

L.

Defective

drive

mechanism

of convection

Check.

fan.

Low power supply voltage.

Check voltage.

Thermistor

shorted.

Procedure

K.

Thermistor

open.

Procedure

K.

AH sensor	open	and/or short.	Procedure	0.
Defective	CPU	unit.	Procedure	0.

0pen or loose wire connection to the Check and repair wiring. above components.

AH sensor assembly and/or steam duct Check and repair them. are not re-installed correctry.

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