Operation Modes And Functions; Fan-Only Mode Function Requirement; Cooling Mode Function Requirement - Midea MPPD-12CRN1-BH9 Service Manual

3. 3 Operation Modes and Functions

3.3.1 Auto mode function requirement
TS range is 62
When T1<TS-1, select the setting temperature of TS-1
for Heating operation's temperature.
When TS+2≥T1≥TS-1,select the Fan-only mode.
When T1>TS+2, select the setting temperature(TS )
for Cooling operation's temperature.
The indoor fan motor operates at Auto-fan mode with speed
uncontrolled and not changed.

3.3.2 Fan-only mode function requirement

The compressor and outdoor fan are OFF at Fan-only mode
(except P1 protection).
The speed of indoor fan can be optionally chosen as High/Mid/Low.
The TS can't be controlled because of the LED displaying as T1.
The ION/TIMER functions are valid at the fan-only mode.

3.3.3 Cooling mode function requirement

The speed of indoor fan can be optionally selected as High/Mid/Low.
The outdoor fan will be turned on as soon as the unit being on cooling
mode.The operation of outdoor fan is according to the compare of
T1 and TS when the water level is below to switch 1.
If not, the outdoor fan doesn't work.
The compressor operates as below:
Operation conditon
(T1-Ts) ℃
+1
0
~88
(17
℉ ℉
Compressor on
Compressor off
~30
℃ ℃).
a) If T1﹥TS+1℃, outdoor fan
operates. After 15 seconds,
compressor operates.
b) The compressor is on, if T1≤TS,
this compressor will stop. If
outdoor fan operates for 3 minutes
at least, it will stop for a delay for 5
seconds.
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