Electronic Function; Main Protection - Midea MPPD-12CRN1-BH9 Service Manual

SLEEP OPERATION
Press this button, the selected temperature will increase(cooling) or
decrease(heating) by 2
(cooling) or decrease (heating) by another 2
minutes. This new temperature will be maintained for 7 hours before it
returns .to the originally selected temperature. This ends the Sleep mode and
the unit will continue to operate as originally programmed.
NOTE: This feature is unavailabe under FAN or DRY mode.

3. ELECTRONIC FUNCTION

3.1 Abbreviation
T1: Indoor room temperature.
T2: Temperature of evaporator.
T3: Temperature of condenser.
TS: The setting temperature.
S1: Water level swicth

3.2 Main Protection

1 The compressor functions protection with a delay of three minutes.
3.2.
Compressor will restart with a delay of three minutes once it stops
operation.But it is four minutes delay for Heat pump model's restarting.
Sensor protection at open or short circuit.
3.2.2
A/D ≤2 Ω, Sensor protection at open circuit;
A/D≥253Ω, Sensor protection at short circuit.
(Table A in next page show you the relation between temperature
and resistance of sensor.)
3.2.3
Auto defrosting at cooling mode or drying mode.
At cooling or drying mode,when T2 ≤2℃ for 3 minutes continuously,
it enters into Auto defrosting function with compressor turning off.
If water level is below S1,outdoor fan motor turns off with three minutes
delay. Auto defrosting function relieves when T2≥10℃ or T2 malfunction or
changing for other operation modes .
1 30 minutes.The temperature will then increase
℉/ ℃
1 after an additional 30
℉/ ℃
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