Sanyo KH2442 / CH2442 Service Manual page 161

(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.
IV - 5
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.
Insulate wide and narrow
tubes separately.
Replace the valve.
Replace indoor
P.C.B. Ass'y.
Replace the sensor.
0459_M_I
SM830082
Section
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