No.
8
9
Item
Freeze prevention
control (Low temp.
release)
Outline of specifications
Remarks
TC1: Temperature of indoor
heat exchanger sensor
2. In all cooling operation, the air conditioner operates
as described below based upon temp. detected by
TC2 and TCJ sensors.
s
When “M” zone is detected for 45 minutes, the
thermostat is forcedly off.
s
In “N” zone, the timer count is interrupted and held.
s
When shifting to “M” zone again, the timer count
restarts and continues.
s
If “L” zone is detected, the timer is cleared and the
operation returns to normal operation.
Reset conditions
P2
Q2
(°C)
L
N
M
( ) value:
When the power supply is
turned on, the Forced
thermo becomes OFF if the
temperature is less than this
indicated temperature.
P2
Q2
TC2, TCJ
41°F(
5°C
)
28.4
°
F(–2.0°C)
Recovery control
for cooling oil
(Refrigerant)
The indoor unit which is under STOP/Thermo. OFF
status or which operates in [FAN] mode performs the
following controls when it received 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 indoor fan and drain pump for approx.
1 minute during recovery control and after finish of
control.
The direction of the louver becomes horizontal
direction.
s
Recovery operation is
usually performed every
2 hours.
1. In all cooling operation, the air conditioner operates
as described below based upon temp. detected by
TC1, TC2 and TCJ sensors.
s
When “J” zone is detected for 5 minutes, the
thermostat is forcedly off.
s
In “K” zone, the timer count is interrupted, and held.
s
When “
I
” zone is detected, the timer is cleared
and the operation returns to the normal operation.
s
When becoming thermo. OFF continuing J zone,
operation of the indoor fan in LOW mode
continues until it reaches the “
I
” zone.
It is reset when the following conditions are satisfied.
Reset conditions
1)
TC1
Ӎ
53.6°F(
12°C
)
and TC2
Ӎ
53.6°F(
12°C
)
and
TCJ
Ӎ
53.6°F(
12°C
)
2)
20 minutes passed after stop.
P1
Q1
(°C)
a
K
J
P1
Q1
TC1
32
°
F
(
0
°C)
TC2, TCJ
14
°
F(-10°C)
6.8°F(-14°C)
SVM-13085.indb 25
SVM-13085.indb 25
12/24/13 10:56 AM
12/24/13 10:56 AM
(°
F
)
50
°
F
(
10
°C)
(41°F)(5°C)
1)
TC1
Ӎ
53.6°F(
12°C
)
and TC2
Ӎ
53.6°F(
12°C
)
and
TCJ
Ӎ
53.6°F(
12°C
)
2)
20 minutes passed after stop.
- 22 -
Summary of Contents for Carrier MMU-AP0074HPUL
Page 15: ...2 WIRING DIAGRAM 15 ...
