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5. Release protective
<In cooling/dry operation>
control by
(Prevent-freezing control for indoor heat exchanger)
temperature of
In cooling/dry operation, the sensor of indoor heat
indoor heat
exchanger detects evaporation temperature and controls
exchanger
the compressor speed so that temperature of the heat
exchanger does not exceed the specified value.
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
Operation flow and applicable data, etc.
Usual cooling capacity control
Usual heating capacity control
R
When the value is
in Q zone, the
Q
compressor speed
is kept.
P
P
When the value is
Q
in Q zone, the
compressor speed
is kept.
R
– 26 –
Description
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.
(R zone)
1) When temperature of the indoor
heat exchanger rises in the range
from 50°C to 55°C, the compres-
sor speed is kept.
(Q zone)
When temperature of the indoor
heat exchanger drops in the
range from 46°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
50°C, or when it drops below to
46°C, the capacity control
operation returns to the usual
control in heating operation.
(R zone)
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