SERVICE MANUAL - Alarko Carrier
SERVICE MANUAL - Alarko Carrier
SERVICE MANUAL - Alarko Carrier
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Item<br />
14. Pulse motor<br />
valve (P.M.V.)<br />
control<br />
SH control<br />
Operation flow and applicable data, etc.<br />
This function controls throttle amount of the<br />
refrigerant in the refrigerating cycle.<br />
According to operating status of the air conditioner,<br />
this function also controls the open degree of valve<br />
with an expansion valve with pulse motor.<br />
Starting up<br />
Initialize<br />
Move to<br />
initial position<br />
Compressor ON<br />
Discharge<br />
temp. control<br />
Description<br />
1) When starting the operation, move the<br />
valve once until it fits to the stopper.<br />
(Initialize)<br />
* In this time, “Click” sound may be<br />
heard.<br />
2) Adjust the open degree of valve by super<br />
heat amount. (SH control)<br />
3) If the discharge temperature was excessively<br />
up, adjust the open degree of valve<br />
so that it is in the range of set temperature.<br />
(Discharge temp. control)<br />
4) When defrost operation is performed, the<br />
open degree of valve is adjusted according<br />
to each setup conditions during<br />
preparation for defrost and during defrost<br />
operation (4-way valve is inversed.).<br />
5) To turn off the compressor while the air<br />
conditioner stops by control of the<br />
thermostat or by remote controller, adjust<br />
the open degree of valve to the setup<br />
value before stop of the compressor.<br />
PMV open degree control<br />
Stop by<br />
remote controller<br />
Room temp. sensor<br />
(Ta sensor) control<br />
Power OFF<br />
Defrost<br />
* SH (Super Heat amount) =<br />
Ts (Temperature of suction pipe of the compressor) –<br />
Tc or Te (Heat exchanger temperature at evaporation side)<br />
* PMV: Pulse Motor Valve<br />
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