Toshiba RAS-3M23GACV-E, Руководство по обслуживанию

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Item
11. Discharge
temperature
control
Operation flow and applicable data, etc. Description
1. Purpose
This function detects error on the
refrigerating cycle or error on the com-
pressor, and performs protective control.
2. Operation
• Control of the compressor speed
The speed control is performed as
described in the left table based upon
the discharge temperature.
* SH (Super Heat amount) =
Ts (Temperature of suction pipe of the compressor) –
Tc (Heat exchanger temperature of indoor unit)
* PMV: Pulse Motor Valve
Starting up
Initialize
Move to initial position
P.M.V. open degree control
SH control
Stop by remote controller
Discharge temp. control
Power OFF
Room temp. sensor
(Ta sensor) control
Compressor ON
12. Pulse motor
valve (P.M.V.)
control
This function controls throttle amount of the
refrigerant in the refrigerating cycle.
According to operating status of the air conditioner,
this function also controls the open degree of valve
with an expansion valve with pulse motor.
1) When starting the operation, move the
valve once 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) To turn off the compressor while the air
conditioner stops by control of the
thermostat or by remote controller, adjust
the open degree of valve to the setup
value before stop of the compressor.
Td value
117°C
112°C
108°C
105°C
98°C
Control operation
Judges as an error and stops the compressor.
Reduce the compressor speed.
Reduce slowly compressor speed.
Keeps the compressor speed.
If the operation is performed with lower speed than one
commanded by the serial signal, speed is slowly raised
up to the commanded speed.
Operates with speed commanded by the serial signal.