Sanyo XH4242 / CH4242, XH3642 / CH3642 Electronic refrigerant control valve is defective

(B)Heating

b.Heating Poor heating

Refrigerant flow failure

Not enough air circulation

Cold air is discharged.

Cold draft prevention is not working.

Is setting temp. suitable ?

Is heating load too large ?

4-way valve is defective.

Refrigerant shortage

Electronic refrigerant control valve is defective.

Compressor is defective.

Service valves are not fully open.

Air filter

is clogged.

Is fan speed set to LOW ?

Refrigerant tubes between indoor and outdoor units are not insulated.

4-way valve is defective.

“STANDBY ” is displayed.

Indoor coil sensor E2 is defective.

4. Service procedures

Change the setting temp.

Review heating load estimate.

Replace the valve.

Charge with refrigerant.

Replace the valve.

Replace the compressor.

Open the valves fully.

Clean the filter.

Set the fan speed to either MEDIUM or HIGH.

4

Insulate wide and narrow tubes separately.

Replace the valve.

Replace indoor

P.C.B. Ass'y.

Replace the sensor.

0459_M_I

SM830082

IV - 5