Toshiba MMC-AP0154H-E(-TR), Service Manual, Page: 33 / 226

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6
Cold air
discharge
prevention
control 1. In heating operation, the upper limit of the fan tap is set according to the lower of
whichever is the higher between TC2 sensor and TCJ sensor temperatures, on
the one hand, and TC1 sensor temperature, on the other.
• If the fan continuously operates in zone B for 6 minutes, it automatically moves
into zone C.
• During defrosting, the control point is shifted by +6 °C.
TCJ: Indoor heat
exchanger sensor
temperature
• In zones D and E,
priority is given to the
remote controller fan
speed setting.
• In zone A, “HEATING
STANDBY ” is
displayed.
7
Freeze
prevention
control (low
temp. release) 1. During cooling, the air conditioner is operated in the manner described below
according to the temperature readings of the TC1, TC2 and TCJ sensors.
• If zone J operation is detected for 5 minutes, the air conditioner is forced into
thermo OFF.
• In zone K, the timer is put on pause, with the current timer count retained.
• If zone I operation is detected, the timer count is cleared, and the air conditioner
returns to normal operation.
• If continuous zone J operation forces the air conditioner into thermo OFF, the
indoor fan is operated in breeze mode until it moves into zone I.
The control is terminated under the following conditions:
Termination conditions
1) TC1 12 °C, TC2 12 °C, and TCJ 12 °C
2) Passage of 20 minutes after stoppage
2. During cooling, the air conditioner is operated in the manner described below
according to the temperature readings of the TC2 and TCJ sensors.
• If zone M operation is detected for 45 minutes, the air conditioner is forced into
thermo OFF.
• In zone N, the timer is put on pause, with the current timer count retained.
• When the air conditioner goes back into zone M, timer count is resumed from
the retained value.
• If zone L operation is detected, the timer count is cleared, and the air conditioner
returns to normal operation.
TC1: Indoor heat
exchanger sensor
temperature
Reset conditions
1) TC1 12 °C, TC2 12 °C and TCJ 12 °C
2) Passage of 20 minutes after stoppage
* With models without
TC2, TC2 is not part
of the control
parameters.
s k r a m e R e n i l t u o n o i t a c i f i c e p S m e t I . O N
Zone A:OFF
Zone B:26 °C or above and
below 28 °C
Breeze
Zone C:28 °C or above and
below 30 °C
Low
Zone D:30 °C or above and
below 32 °C
Medium
Zone E:High
Temperature in ( ): If the temperature is below
this value when the power is turned on, the air
conditioner is forced into thermo OFF.
TC1 TC2, TCJ
P1 10 °C (5 °C) -10 °C
Q1 0 °C -14 °C
TC2, TCJ
P2 5
Q2 -2.0