Carrier 38MHRCQ24AA3 User Manual

22 Specifications subject to change without notice. SG-38MHRC-01
Indoor Fan Running Rules:
•In the COOLING mode, the indoor fan runs continuously and the
user can select any of the following speeds: HIGH, MEDIUM,
LOW and AUTO.
• When the setting temperature is reached, if the compressor stops
running, the indoor fan motor runs in the minimum or setting
speed (see Fig. 22).
Fig. 22 — Indoor Fan Running Rules
The AUTO fan adheres to the following rules (see Fig. 23):
Fig. 23 — AUTO FAN Running Rules
Compressor Temperature Protection
Fig. 24 — Compressor Temperature Protection
•Off: Compressor stops
•Decrease: Decrease the running frequency to the lower level
•Hold: Keep the current frequency
•Resume: No limitation for frequency
When the condenser temperature is higher than the setting value, the
compressor stops.
Evaporator Temperature Protection
When the evaporator temperature is lower than the setting value the
compressor stops.
HEATING Mode
Compressor Running Rules:
• When T1-Ts>-T, the compressor stops.
• When T1-Ts<T-1.5, the compressor is on. T is the programmed
parameter for temperature compensation.
• When the AC runs in MUTE mode, the compressor runs with a
low frequency.
• When the current is more than the setting value, the current
protection function activates and the compressor stops.
Outdoor Fan Running Rules:
The outdoor unit runs at a different fan speed according to T4. For
different outdoor units, the fan speeds differ.
Fig. 25 — Outdoor Fan Running Rules
Setting Fan
Speed
T1-Td °F (°C)
Actual Fan Speed
H
H + (H+=H+G)
H (=H)
A
B
C
H - (H- =H-G)
M
D
E
F
M + (M+=M+Z)
M (M=M)
M - (M- =M-Z)
L
H
I
G
L + (L+=L+D)
L (L=L)
L - (L- =L-D)
8.1°F (4.5°C)
5.4°F (3.0°C)
2.7°F(1.5°C)
8.1°F (4.5°C)
5.4°F (3.0°C)
2.7°F(1.5°C)
8.1°F (4.5°C)
5.4°F (3.0°C)
2.7°F(1.5°C)
a
b
c
d
e
T1
°F°C
10.8
°F (6.0°C)
9°F (5.0°C)
7.2°F (4.0°C)
10.8°F (6.0°C)
1.8°F (1.0°C)
H
(H-L)*0.75+L
(H-L)*0.5+L
(H-L)*0.25+L
L
T3
O
Decrease
Hold
Resume
E
C
B
A
T4 °F°C
D
69.8°F (21°C)
66.2
°F (19°C)
64.4
°F (18°C)
60.8
°F (16°C)
59°F (15°C)
54.4°F (13°C)
53.6
°F (12°C)
DC_FAN_SLOW_SPD_ADD°F
50°F (10°C)
DC_FAN_SLOW_SPD_ADD
DC_FAN_MIN_SPD_ADD
DC_FAN_MID_SPD_ADD
DC_FAN_HI_SPD_ADD

Carrier 38MHRCQ24AA3 Specifications

General

Brand	Carrier
Model	38MHRCQ24AA3
Category	Air Conditioner
Language	English