Toshiba MMD-AP0481HF2UL Service Manual page 25

No. Item
9 Freeze preventive
control
(Low temperature
release)
Outline of specifications
1) The cooling operation is performed as follows based on
the detected temperature of TC1 sensor, TC2 sensor
and TCJ sensor.
• When [J] zone is detected for 5 minutes, thermostat is
forced to turn off.
• In [K] zone, timer counting pauses and is held.
• When [J] zone is detected, timer is cleared and returns
to normal operation.
• If thermostat is forcedly off by continuation of [J] zone,
indoor fan only operates until zone changes to [I] zone.
When the following conditions are satisfied, control
function resets.
<Reset conditions>
TC1 > 54 ˚F [ 12 ˚C ] and TC2 > 54 ˚F [ 12 ˚C ] and
TCJ > 54 ˚F [ 12 ˚C ]
20 minutes passed after stop
F˚ [ ˚C ]
I
P1
K
Q1
J
TC1
˚ ˚
P1 50 F [ 10 C ] (41
˚
Q1 32 F [ 0
( ) value:
When power supply is turned on, if
the value is under this temperature,
thermostat is forcedly off.
2) The cooling operation is performed as follows based on
the detected temperature of TC2 sensor and TCJ
sensor.
When [M] zone is detected for 45 minutes, thermostat
is forced to turn off.
In [N] zone, timer counting pauses and is held.
When shifting to [M] zone again, timer counting
restarts and continues.
When [L] zone is detected, timer is cleared and
operation returns to normal operation.
F˚ [ ˚C ]
L
P2
N
Q2
M
<Reset conditions>
TC1 > 54 ˚F [ 12 ˚C ] and TC2 > 54 ˚F [ 12 ˚C ] and
TCJ > 54 ˚F [ 12 ˚C ]
20 minutes passed after stop
a
TC2, TCJ
˚ ˚ ˚
F [ 5 C ]) 14 F [ –10
˚ ˚
C ] 7 F [ –14
TC2, TCJ
P2 41 ˚F [ 5 ˚C ]
Q2 28 ˚F [ –2 ˚C ]
– 25 –
Remarks
˚
C ]
˚
C ]