Heating Mode; Defrosting Mode; Auto Mode; Evaporator Temperature Protection - Midea DLFSHB Manual

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HEATING Mode

Compressor Control
1. Reach the configured temperature:
• If the following conditions are satisfied, the compressor ceases
operation.
While the calculated frequency (fb) is less than the minimum
a.
limit frequency (FminC).
When the protective time is more than or equal to ten minutes.
b.
c. When T1 is higher than or equal to Tsc+HDIFTEMP2.
NOTE: HDIFTEMP2 is the EEPROM setting parameter. It is 4F
(2C) usually.
• If the following conditions are satisfied, regardless of time.
Compressor running frequency is more than test frequency.
a.
b. When the compressor running frequency is equal to the test
frequency, T4 is more than 59F (15C) or no T4 or T4 fault.
c. Change the setting temperature.
d. Turbo or sleep function on or off.
2. When the current is higher than the predefined safe value, the surge
protection is activated, causing the compressor to cease operations.
Indoor Fan Control
1. In the HEATING mode, the indoor fan operates continuously. The
fan speed can be set to 1%−100%, or muted.
2. AUTO fan
Rise curve
•
When T1−Tsc is higher than −2.7F (-1.5C), fan speed
a.
reduces to 80%;
b. When T1−Tsc is higher than 0F (0C), fan speed reduces to
60%;
When T1−Tsc is higher than 0.9F (0.5C), fan speed reduces
c.
to 40%;
When T1−Tsc is higher than 1.8F (1C), fan speed reduces
d.
to 20%.
Descent curve
•
When T1−Tsc is lower than or equal to 0.9F (0.5C), fan
a.
speed increases to 20%;
When T1−Tsc is lower than or equal to 0F (0C), fan speed
b.
increases to 60%;
When T1−Tsc is lower than or equal to −2.7F (−1.5C), fan
c.
speed increases to 80%;
When T1−Tsc is lower than or equal to −5.4F (−3C), fan
d.
speed increases to 100%.
Outdoor Fan Control
• The outdoor unit runs at a different fan speed according to T4 and
compressor running frequency.
• For different outdoor units, the fan speeds differ.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

DEFROSTING Mode

• The unit enters the DEFROSTING mode according to changes in
the temperature value of T3, T4 as well as the compressor running
time.
• In the DEFROSTING mode the compressor continues to run and the
indoor and outdoor motor stop operating, the indoor unit's defrost
light illuminates, and the
• If any one of the following conditions is satisfied, defrosting
ends and the unit switches to the normal HEATING mode:
• T3 rises above TCDE1C.
• T3 maintained above TCDE2C for 80 seconds.
• Unit runs for 15 minutes consecutively in the

Evaporator Temperature Protection

• Off: Compressor stops.
• Decrease: Decrease the running frequency to the lower level per 20
seconds.
• Hold: Keep the current frequency.
• Resume: No limitation for frequency.

AUTO Mode

• This mode can be selected with the remote controller and the setting
temperature can be changed between 61F~86F (16C~30C).
• In the AUTO mode, the unit selects the COOLING, HEATING,
AUTO−DRYING or FAN−ONY mode on the basis of T1,Ts, T4 and
relative humidity.
• If the setting temperature is modified, the machine selects a new run-
ning function.
DRY Mode
In the DRY mode, the air conditioner operates the same as the auto fan
function in the COOLING mode.
1. Mute function is active.
All the protections are activated and operate the same as they do
•
that in COOLING mode.
2. Low Room Temperature Protection
• If the room temperature is lower than 50F (10C), the
compressor ceases operations and does not resume until the room
temperature exceeds 53.6F (12C).
Forced Operation Function
Forced COOLING Mode:
The compressor and outdoor fan continue to run and the indoor fan
runs at rated speed. After running for 30 minutes, the air conditioner
switches to AUTO mode with a preset temperature of 75.2F (24C).
Forced AUTO Mode:
The Forced AUTO mode operates the same as the normal AUTO mode
with a preset temperature of 75.2F (24C)
• The unit exits the forced operation when it receives the following sig-
nals:
• Switch on
Switch off
•
• Timer on
Timer off
•
• Changes in:
• Mode
Fan Speed
•
• Setting Temperature
13
symbol appears.
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