Toshiba MMU-UP0071MH-UL Service Manual page 32

No. Item
7 Prevention of cold
air discharge
8 Freeze prevention
control (Low temp.
release)
Outline of specifications
1. In heating operation, the lowest temperature between
TC1 sensor and the highest temperature between
TC2 and TCJ sensor is set as the upper bound of the
fan speed mode control.
• When B zone has been continuing for 6 minutes,
the operation shifts to C zone.
• For the defrosting operation, the control point is
set to +10.8°F (+6°C).
°F [°C]
90 [32]
D
86 [30]
C
82 [28]
75 [26]
68 [20]
61 [16]
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.
• If "J" zone continues, 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 ≥ 54°F [12°C] and TC2 ≥ 54°F [12°C] and TCJ
≥ 54°F [12°C]
2) 20 minutes passed after stop.
(°C)
I
P1
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.
(°C)
L
P2
N
Q2
M
A zone: OFF
B zone:
Over 72°F [26°C], below 82°F [28°C], ULTRA LOW (LL)
C zone:
E
Over 82°F [28°C], below 86°F [30°C], LOW (L)
D zone:
Over 86°F [30°C], below 90°F [32°C], MED (H)
E zone: HIGH (HH)
B
A
I
TC1 TC2, TCJ
a 50°F (41°F)
P1
[10°C (5°C)] [–10°C]
Q1 32°F [0°C] 7°F [–14°C]
TC2, TCJ
P2 41°F [5°C]
Q2 28°F [–2.0°C]
– 32 –
Remarks
TCJ: Temperature of indoor
heat exchanger sensor
• In D and E zones, priority
is given to remote control-
ler fan speed setup.
• In A zone "
TC1: Temperature of indoor
heat exchanger sensor
" zone.
( ) value:
When the power supply is
turned on, the forced
thermostat becomes OFF if
14°F
the temperature is less than
this indicated temperature.
" is displayed.