Pulse Motor Valve (Pmv) Control; Clean Operation; Purpose; Operation - Toshiba RAS-07PKVP-E Service Manual

High Wall, Heat Pump Type
8-14.Pulse Motor Valve
(PMV) Control
This function controls throttle amount of the refrigerant
in the refrigerating cycle.
According to operating status of the air conditioner, this
function controls the open degree of valve with an
expansion valve with pulse motor.
Starting up
Initialize
Move to initial position
*SH control
*PMV open degree control
Stop by
Thermo. OFF
remote controller
Setup value
Setup value
Power OFF
* SH (Super Heat amount) =
TS (Temperature of suction pipe of the compressor)
–
TC or TE (Heat exchanger temperature at
evaporation side)
* PMV: Pulse Motor Valve
1) When starting the operation, move the valve
until it fits to the stopper. (Initialize)
NOTE
In this time, "Click" sound may be heard.
2) Adjust the open degree of valve by super heat
amount. (SH control)
3) If the discharge temperature was excessively
up, adjust the open degree of valve so that it is
in the range of set temperature. (Discharge
temp. control)
4) When defrost operation is performed, the open
degree of PMV is adjusted according to each
setup conditions; during preparation for defrost
or during defrost operation (4-way valve is
inversed.).
5) When turn off the compressor by thermo.
OFF or STOP by remote controller, the open
degree of the PMV is adjusted to the setup
value.

8-15.Clean Operation

8-15-1. Purpose

The clean operation is to minimize the growth of mold,
bacteria etc. by running the fan and drying so as to
keep the inside of the air conditioner clean.
When the cooling or dry operation shuts down, the unit
automatically starts the clean operation which is then
performed for the specified period based on duration of
the operation which was performed prior to the
shutdown, after which the clean operation stops.
(The clean operation is not performed after a heating

operation.)

Compressor ON
TD
release control
Defrost
Setup value
• During clean operations: The louver opens slightly.
8-15-2. Operation
46
Unit now performing cooling or dry operation
Push "STOP" button
Only S.CLEAN indicator lights,
and clean operation starts
Time set now elapses
Operation stops
The indoor fan operates continuously at a speed of
450 rpm.
1) When the stop signal from the remote
controller is received, the S.CLEAN indicator
(Orange) on the main body lights, and the
clean operation starts.
(Neither the OPERATION indicator nor the
PURE indicator light.)
2) The period of the clean operation is determined
by the duration of the operation performed prior
to the reception of the stop code.
3) After the clean operation has been performed
for the specified period, the unit stops
operating.
Service Manual