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P1
Q1
°F
(°C)
a
K
J
I
No.
7
8
Item
Freeze prevention
control
(Low temp. release)
Outline of specifications
1. In all cooling operation, the air conditioner operates
as described below based upon temp.detected by
TC1, TC2 and TCJ sensors.
• When “J” zone is detected for 5 minutes, the
thermostat is forced to turn off.
• In “K” zone, the timer count is interrupted, and held.
• When “
I
” zone is detected, the timer is cleared
and the operation returns to the normal operation.
• If “J” zone continues, operation of the indoor fan in
LOW mode will continue until it reaches the “
I
” zone.
It is reset when the following conditions are
satisfied.
Reset conditions
1) TC1 > 54°F [12°C] and TC2 > 54°F [12°C] and
TCJ > 54°F [12°C].
2) 20 minutes passed after stop.
Remarks
2. In all cooling operation, the air conditioner oper-
ates as described below based upon temp. de-
tected by TC2 and TCJ sensors.
• When “M” zone is detected for 30 minutes, the
thermostat is forced to turn off.
• In “N” zone, the timer count is interrupted and held.
• When shifting to “M” zone again, the timer count
restarts and continues.
• If “L” zone is detected, the timer is cleared and
the operation returns to normal operation.
Reset conditions
1) TC1 > 54°F [12°C] and TC2 > 54°F [12°C] and
TCJ > 54°F [12°C].
2) 20 minutes passed after stop.
P2
Q2
°F
(°C)
L
N
M
( ) value:
When the power supply is
turned on, the thermostat is
forced to turn off if the
temperature is less than this
indicated temperature.
P1
Q1
TC1
50°F [10°C]
(41°F [5°C])
32°F [0°C]
TC2, TCJ
14°F
[–10°C]
7°F [–14°C]
P2
Q2
TC2, TCJ
41°F [5°C]
28°F [–2.0°C]
∗
In a Model without TC2,
TC2 is not considered.
Recovery control
for cooling oil
(Refrigerant)
The indoor unit which is in STOP/Thermostat-OFF
status or which operates in [FAN] mode performs the
following controls when it receives the cooling oil
(Refrigerant) recovery signal from the outdoor unit.
1) Opens PMV of the indoor unit with a constant
opening degree.
2) Operates the drain pump for approx. 1 minute
during recovery control and after finish of control.
• Recovery operation is
usually performed every
2 to 5 minutes.
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