Carrier 40MAHB Series Service Manual page 10

40MAHB: Service Manual
HEATING Mode
Indoor Fan Running Rules:
When the compressor is on, the indoor fan can be set to HIGH,
MEDIUM, LOW, AUTO, MUTE. When the indoor unit coil
temperature is low, the anti-cold air function starts and the indoor fan
motor runs at a low speed and the speed cannot be changed. When the
temperature is lower than the setting value, the indoor fan motor stops.
When the indoor temp reaches the setting temperature, the compressor
stops and the indoor fan motor runs at the minimum speed or setting
speed. The anti-cold air function is valid. The indoor fan is controlled as
shown in Fig. 13.
Setting fan
T1-Td
speed
H
M
L
Fig. 13 —Indoor Fan Running Rules
AUTO Fan Action in HEATING Mode
Fig. 14 — AUTO Fan Action in HEATING Mode
DEFROSTING Mode
The air conditioner enters the DEFROSTING mode according to
the T3 temperature value and the T3 temperature change value
range plus the compressor running time. During the DEFROSTING
mode, the compressor continues to runs, the indoor and outdoor motors
stop, and the indoor unit defrost lamp illuminates and
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Evaporator Coil Temperature Protection
Actual fan speed
H- H-=H-G)
H =H
H+(H+=H+G)
M-(M-=M-Z)
M(M=M)
When the evaporator temperature is higher than the setting protection
M+(M+=M+Z)
value, the compressor stops.
L-(L-=L-D)
AUTO Mode
L(L=L)
L+(L+=L+D)
This mode can be chosen with the remote controller and the setting
temperature can be changed between 62.6F(17C)~86F(30C). In the
AUTO mode, the air conditioner chooses the COOLING, HEATING or
FAN ONLY mode according to T (T =T1-Ts).
The indoor fan runs under AUTO fan in the relevant mode. The louver
operates the same as in relevant mode. If the air conditioner switches
between the HEATING and COOLING mode, the compressor stops for
a certain period of time and then chooses the mode according to T1-Ts. If
the setting temperature is modified, the air conditioner chooses the
running function again.
appears.
DRYING Mode
Indoor Fan Speed is Fixed
Indoor fan speed is fixed at BREEZE and can not be changed. The louver
angle is the same as in the COOLING mode.
Low Indoor Room Temperature Protection
In the DRYING mode, if the room temperature is lower than 50F
(10C), the compressor stops and will not resume until the room
temperature exceeds 53.6F (12C).
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Fig. 15 —
Evaporator Coil Temperature Protection
Fig. 16 — AUTO Mode