Sanyo SAP-CMRV1923GJ Technical & Service Manual page 31

9-3-7. Electric expansion valve
When replacing the electric expansion valve and coil, be sure to attach the connectors in the correct positions. Labels are
applied to the valve body and coil, corresponding to the connector colors, to identify them.
o voltage on circuit board
ec t e ill
of t e re
Replace t e controller.
E:
ool the main unit with
a damp cloth or other
means while welding.
When applying
vacuum, use the
special service magnet
and rotate at least
revolutions
counterclockwise to
fully open the electric
expansion valve.
If you have manually checked the electric expansion valve, be sure to reapply the outdoor 220 V after you have replaced the
wiring. (The position of the electric expansion valve will be changed.)
9-3- . ranc t in te perat re sensor
heck that the sensor is securely contained in the thermostat holder.
9-3-9. rea er
heck whether or not the breaker has been tripped.
heck that the breakers and fuses used are of the specified capacity.
heck that the breaker and its line are exclusive for A/ use.
9-3-10. Refri erant as press re
tart a L test run, and measure the temperatures of the A/ intake air and discharge air. ompare the values with the
performance charts.
If the values are higher than the performance charts
heck for refrigerant shortage or blockage of the refrigerant circuit.
Assess ent of refri erant s orta e:
a The low pressure pressure value is
There is little condensation on the indoor heat exchanger, which overall appears dry.
istin is in et een refri erant s orta e an refri erant circ it loc a e:
If the low pressure pressure does not change when the circuit is charged 2
or if the change is small, then the problem may not be refrigerant shortage. The problem may be a blockage of the
refrigerant circuit.
heck that the electric expansion valve is not blocked. heck as described on the preceding page.
ontroller c ec
Voltage varies
ination ec t e coil resistance.
E .
0
Replace t e coil.
o temperature change
Replace t e electric
expansion valve.
a or more below the value in the performance charts.
se a tester to
When the power is turned
V (white)
sequence in approximately 10 20 seconds for each point.
( V is available only for
Approx. 4 4
pen an close t e
electric expansion valve
an to c ec it.
Temperature changes
is part is nor al.
ec else
times with refrigerant gas (200 g each time),
28
eas re t e volta e 1 .
, the needle will move from
VA (black) V (red)
RV24 model.)
ec t e resistance et een t e
ra lea ire an t e ot er ires.
Resistance is if it is
se t e special service
an rotate revol tions
cloc ise to f ll close t e valve.
en start t e nit an
t e te perat res at t e inlet an
o tlet t es of t e electric
expansion valve. f t e
te perat re ifference is lar e
t e valve is close .
en rotate revol tions
co ntercloc ise to open t e
valve. peration is nor al if t e
te perat re ifference et een
ere.
t e t es rops.
V (blue) in
at 0 .
a net
eas re