Midea MCD-18HRFN1-QRC8 - Evaporator low temperature T2 protection.; Condenser high temperature T3 protection

Electrical Control Function
118 Electrical Control System
1.3.3.5 High evaporator coil temp.T2 protection:
For 12K units：
TEstop
T2
Resume
Off
Decrease
TEdown
TEnorm
Hold
Off: Compressor stops.
Decrease: Decrease the running frequency to the lower level.
Hold: Keep the current frequency.
Resume: No limitation for frequency.
For other units:T2>60℃, the compressor will stop and restart when T2≤54℃.
1.3.4 Auto-mode
This mode can be chosen with remote controller and the setting temperature can be changed between
17~30℃.
In auto mode, the machine will choose cooling, heating or fan-only mode according to ∆T (∆T =T1-Ts).
For 12K units:
∆T=T1-Ts Running mode
∆T＞1℃
Cooling
-1<∆T≤1℃
Fan-only
∆T≤-1℃
Heating
For other units:
∆T=T1-Ts Running mode
∆T≥2℃
Cooling
-1≤∆T<2℃
Fan-only
∆T<-1℃
Heating
Indoor fan will run at auto fan of the relevant mode.
The louver operates same as in relevant mode.
If the machine switches mode between heating and cooling, the compressor will keep stopping for 15
minutes and then choose mode according to T1-Ts.
If the setting temperature is modified, the machine will choose running function again.