Pulse Modulating Valve (P.m.v.) Control - Toshiba RAS-10N3AV2-A Service Manual

Item
This function controls throttle amount of the
12. Pulse
refrigerant in the refrigerating cycle.
Modulating
valve (P.M.V.) According to operating status of the air conditioner,
this function also controls the open degree of valve
control
with an expansion valve with pulse Modulation.
Starting up
Initialize
Move to
initial position
SH control
PMV open degree control
Compressor Stop by
Turn OFF by
"Room Temperature
remote controller
Move to "Stop
Position" (Setup
from factory)
* SH (Super Heat amount) =
Ts (Temperature of suction pipe of the compressor) –
Tc or Te (Heat exchanger temperature at evaporation side)
* PMV: Pulse Modulating Valve
Operation flow and applicable data, etc.
Compressor ON
Td
release control
Control"
Move to "Defrost
Position" (Setup
1) When starting the operation, move the
2) Adjust the open degree of valve by super
3) If the discharge temperature was exces-
4) When defrost operation is performed, the
5) When operation is OFF by the remote
Defrosting
operation
from factory)
– 41 –
FILE NO. SVM-13001
Description
valve once until it fits to the stopper.
(Initialize)
* In this time, "Click" sound may be
heard.
heat amount. (SH control)
sively up, adjust the open degree of valve
so that it is in the range of set tempera-
ture. (Discharge temp. control)
open degree of valve is adjusted accord-
ing to each setup conditions during
preparation for defrost and during defrost
operation (4-way valve is inversed.).
controller or when compressor is OFF by
room temperature control, the open
degree of valve is adjusted to the stop
position.