Toshiba Carrier MMU-AP0074HPUL Service Manual page 22

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