user manual

– 42 –
(˚C)
32
30
28
26
20
16
Tc
Tcj
HH
H
L
UL
OFF
E zone
D zone
C zone
B zone
A zone
5
2
A
J
K
I
(˚C)
A
B
L
N
M
(˚C)Tc
Tcj
No.
6
Item
Cool air
discharge
preventive
control
Outline of specifications
1) In heating operation, the indoor fan is controlled based
on the detected temperature of Tc sensor or Tcj sensor.
As shown below, the
upper limit of the
revolution frequency
is determined.
Remarks
In D or E zone, the priority
is given to setup of air
volume exchange.
In A and B zones,
[PRE-HEAT] is displayed.
1) The cooling operation (including Dry operation) is
performed as follows based on the detected tempera-
ture of Tc sensor or Tcj sensor.
When [J] zone is detected for 6 minutes (Following
figure), the commanded frequency is decreased from
the real operation frequency. After then the commanded
frequency changes every 30 seconds while operation is
performed in [J] zone.
In [K] zone, time counting is interrupted and the opera-
tion is held.
When [I] zone is detected, the timer is cleared and the
operation returns to the normal operation.
If the commanded frequency becomes S0 because the
operation continues in [J] zone, the return temperature
A is raised from 5°C to 12°C until [I] zone is detected
and the indoor fan
operates with [M] mode.
In heating operation, the freeze-preventive control
works if 4-way valve is not exchanged and the condition
is satisfied. (However the temperature for J zone
dashing control is changed from 2°C to –5°C.)
7
8
Freeze
preventive
control
(Low
temperature
release)
Tcj : Indoor heat ex-
changer sensor
temperature
High-temp
release control
1) The heating operation is performed as follows based on
the detected temperature of Tc sensor or Tcj sensor.
• When [M] zone is detected, the commanded fre-
quency is decreased from the real operation fre-
quency. After then the commanded frequency
changes every 30 seconds while operation is per-
formed in [M] zone.
• In [N] zone, the commanded frequency is held.
• When [L] zone is detected, the commanded fre-
quency is returned to the original value by approx.
6Hz every 60 seconds.
Setup at
shipment
Same when thermostat is
turned off.
Control temp (°C)
AB
56 (54) 52 (52)
NOTE :
When the operation has started or when Tc or Tcj became
lower than 30°C after start of the operation, temperature is
controlled between values in parentheses of A and B.