Carrier TOSHIBA MMK-UP0301HP-UL Service Manual page 19

No. Item
(1) In heating operation, the upper limit of the fan tap is set by
6 Prevention of
cold air
discharge
(°F)
89.6
86
82.4
78.8
68
33.8
(1) In cooling operation, the air conditioner operates as de-
7 Freeze preven-
tion control
(Low temp.
release)
(2) In cooling operation, the air conditioner operates as
Outline of specifications
one with higher temperature of TC2 sensor and TCJ
sensor.
• 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).
(°C)
32
D
30
C E
28
26
20
B
16
A
scribed below based upon temp. detected by TC1, TC2 and
TCJ sensors.
To prevent the heat exchanger from freezing, the operation
stops.
• When "J" zone is detected for 5 minutes, the forced
thermo is OFF.
• In "K" zone, the timer count is interrupted, and held.
• When " I I I I I " zone is detected, the timer is cleared and the
operation returns to the normal operation.
• When the forced thermo-OFF became S0 with continua-
tion of "J" zone, operation of the the indoor fan in LOW (L)
mode until it reaches the " I I I I I " zone.
It is reset when the following conditions are satisfied.
Reset conditions
1)
53.6°F(12°C) and TC2
TC1
53.6°F(12°C)
TCJ
2)
20 minutes passed after stop.
(°F)
(°C)
P1 a
K
Q1
J
described below based upon temp. detected by TC2 and
TCJ sensors.
• When "M" zone is detected for 45 minutes, the forced
thermo is 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 53.6°F(12°C) and TC2
53.6°F(12°C)
TCJ
2) 20 minutes passed after stop.
(°F)
(°C)
L
P2
N
Q2
M
A zone: OFF
B zone:
Over 78.8°F(26°C), below 82.4°F(28°C),
ULTRA LOW (LL)
C zone:
Over 82.4°F(28°C), below 86°F(30°C), LOW (L)
D zone:
Over 86°F(30°C), below 89.6°F(32°C), MED (H)
E zone: HIGH (HH)
53.6°F(12°C) and
TC1 TC2, TCJ
50°F(10°C)(41°F)(5°C) 14°F(-10°C)
P1
6.8°F(-14°C)
32°F(0°C)
Q1
53.6°F(12°C) and
TC2, TCJ
41°F(5°C)
P2
28.4°F(–2.0°C)
Q2
- 19 -
Remarks
• In D and E zones, priority
is given to remote control-
ler air speed setup.
• In A and B zones, " " is
displayed.