Pulse Motor Valve (P .M.v.) Control - Toshiba RAS-10SAVP-E Service Manual

Toshiba ilmalämpöpumppujen myynti, huolto ja asennus: Jäähdytinpalvelu RefGroup Oy, Vantaa
Item Operation flow and applicable data, etc.
14. Pulse motor This function controls throttle amount of the refriger-
valve (PMV) ant in the refrigerating cycle.
control
According to operating status of the air conditioner,
this function controls the open degree of valve with
an expansion valve with pulse motor.
Move to initial position
SH control
PMV open degree control
Stop by
remote controller
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
Starting up
Initialize
Compressor ON
release control
Thermo. OFF Defrost
Setup value Setup value
www.ilmalämpöpumput.com
1) When starting the operation, move the
valve until it fits to the stopper. (Initialize)
* 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 exces-
sively up, adjust the open degree of valve
so that it is in the range of set tempera-
ture. (Discharge temp. control)
4) When defrost operation is performed, the
open degree of PMV is adjusted accord-
ing 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 valve.
Td
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Description