Toshiba MMC-AP0157HP1-E Service Manual page 25

No. Item
8 Freeze prevention
control (Low temp.
release)
9 Recovery control
for cooling oil
(Refrigerant)
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 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.
Reset conditions
1) TC1 12°C and TC2
2) 20 minutes passed after stop.
(°C)
P1 a
K
Q1
J
2. In all cooling operation, the air conditioner operates
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.
Reset conditions
1) TC1 12°C and TC2
2) 20 minutes passed after stop.
(°C)
L
P2
N
Q2
M
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.
I
" zone.
12°C and TCJ 12°C
TC1 TC2, TCJ
P1 10°C (5°C) –10°C
Q1 0°C –14°C
12°C and TCJ 12°C
TC2, TCJ
P2 5°C
Q2 –2°C
– 25 –
FILE NO. SVM-16042
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.