Toshiba MMU-AP0072H2UL Service Manual page 40

No. Item
6 Prevention of cold
air discharge
7 Freeze prevention
control
(Low temp. release)
Outline of specifications
1. In heating operation, the higher temperature of TC2
sensor and TCJ sensor is compared with temperature
of TC1 sensor and then the lower temperature is
used to set the upper limit of the fan tap.
• When B zone has continued for 6 minutes, the
operation shifts to C zone.
• In defrost time, the control point is set to
+10.8°F[6°C].
˚F [˚C]
97 [36]
D
93 [34]
C
90 [32]
86 [30]
75 [24]
68 [20]
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.
• When " I " zone is detected, the timer is cleared
and the operation returns to the normal operation.
• If forced thermo OFF by continuation of "J" zone,
operation of the indoor fan in LOW mode contin-
ues until it reaches the "
It is rest 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.
˚F
[˚C]
I
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 > 54°F [12°C] and TC2 > 54°F [12°C] and TCJ
> 54°F [12°C]
2) 20 minutes passed after stop.
˚F
[˚C]
L
P2
N
Q2
M
A zone: OFF
B zone:
Over 86˚F [30˚C], below 90˚F [32˚C], ULTRA LOW (LL)
E
C zone:
Over 90˚F [32˚C], below 93˚F [34˚C], LOW (L)
D zone:
Over 93˚F [34˚C], below 97˚F [36˚C], MED (H)
E zone: HIGH (HH)
B
A
I " zone.
TC1 TC2, TCJ
50°C [41°F] 14°F
P1
10°C [5°C] [–10°C]
32.5°F 7°F
Q1
[0°C] [–14°C]
TC2, TCJ
P2 41°F [5°C]
Q2 28°F [–2°C]
40
Remarks
TCJ: Temperature of indoor
heat exchanger sensor
• In D and E zones, priority
is given to remote control-
ler air speed setup.
• In A zone " " is displayed.
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.