Release Protective Control By Temperature Of Indoor Heat Exchanger - Toshiba RAS-M10PKVP-E Service Manual

Item
6. Release protective <In cooling/dry operation>
control by
(Prevent-freezing control for indoor heat exchanger)
temperature of indoor
In cooling/dry operation, the sensor of indoor heat
heat exchanger
exchanger detects evaporation temperature and
controls the compressor speed so that temperature of
the heat exchanger does not exceed the specified
value.
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
P
Q
R
– 58 –
1) When temperature of the indoor
heat exchanger drops below 5°C,
the compressor speed is re-
duced. (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.
When the value is
in Q zone, the
(R zone)
compressor speed
is kept.
1) When temperature of the indoor
heat exchanger rises in the range
from 52°C to 55°C, the compres-
sor 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)
When the value is
3) When temperature of the indoor
in Q zone, the
heat exchanger does not rise to
compressor speed
52°C, or when it drops below to
is kept.
48°C, the capacity control
operation returns to the usual
control in heating operation.
(R zone)
Description