Release Protective Control By Temperature Of Indoor Heat Exchanger - Toshiba RAS-M10PKVP-E Service Manual
Air conditioner (split type)
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<In cooling / dry operation>
6. Release
protective
(Prevent-freezing control for indoor heat exchanger)
control by
In cooling / dry operation, the sensor of indoor heat exchanger
temperature
detects evaporation temperature and controls the compressor
of indoor
speed so that temperature of the heat exchanger does not exceed
heat
the specified value.
exchanger
Usual cooling capacity control
7˚C
6˚C
5˚C
Reduction of compressor speed
<In heating operation>
(Prevent-overpressure control for refrigerating cycle)
In heating operation, the sensor of indoor heat exchanger detects
condensation temperature and controls the compressor speed so
that temperature of the heat exchanger does not exceed the
specified value.
Reduction of compressor speed
55˚C
52˚C
48˚C
Usual heating capacity control
Operation flow and applicable data, etc.
R
Q
P
Q
R
When the value is
in Q zone, the
compressor speed
is kept.
P
When the value is
in Q zone, the
compressor speed
is kept.
– 64 –
Description
1) When temperature of the indoor heat
exchanger drops below 5°C, the
compressor speed is reduced. (P
zone)
2) When temperature of the indoor heat
exchanger rises in the range from
6°C to under 7°C, the compressor
speed is kept. (Q zone)
3) When temperature of the indoor heat
exchanger rises to 7°C or higher, the
capacity control operation returns to
the usual control in cooling operation.
(R zone)
1) When temperature of the indoor heat
exchanger rises in the range from
52°C to 55°C, the compressor speed
is kept. (Q zone)
When temperature of the indoor heat
exchanger drops in the range from
48°C to under 55°C, the compressor
speed is kept. (Q zone)
2) When temperature of the indoor heat
exchanger rises to 55°C or higher,
the compressor speed is reduced.
(P zone)
3) When temperature of the indoor heat
exchanger does not rise to 52°C, or
when it drops below to 48°C, the
capacity control operation returns to
the usual control in heating operation.
(R zone)
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