Forced Operation Function; Action Of 4-Way Valve; Two Speeds Outdoor Fan Function - Midea MSV1-09HRFN1-MT0W Service Manual

In auto mode, the machine will choose cooling, heating or fan-only mode according to ΔT(ΔT =T1-Ts).
ΔT=T1-Ts
-1≤ΔT≤1℃
8.8.2 Indoor fan will choose auto speed of relevant mode.
8.8.3 If the machine switches mode between heating and cooling, compressor will keep stopping for 15 minutes and
then rechoose mode according to ΔT.
8.8.4 If the setting temperature is modified, the machine will rechoose running function.

8.9 Forced operation function

8.9.1 Forced cooling and auto function can carry out with a touch button. In these two modes, the machine can be
changed by remote controller to any other mode at any moment.
8.9.2 When the machine is off, pressing the touch button will carry the machine to forced auto mode, after this, if
pressing the button once again within 5 seconds, the machine will turn into forced cooling mode. In forced auto,
forced cooling or any other operation mode, pressing touch button will turn off the machine. In forced operaton,
remote control is available.
8.9.3 In forced operation mode, all general protections is available.
8.9.4 In forced cooling mode, after running for 30 minutes. the machine will turn to normal auto mode which setting
temperature is 24℃.
8.9.5 The action of forced auto mode is the same as normal auto mode which temperature is 24℃.

8.10 Action of 4-way valve

In heating, fan-only, standby or turning off mode, 4-way valve is off, while in cooling\drying and forced cooling
mode 4-way valve is on. If the machine changes operation mode from heating to cooling\drying\forced cooling
mode, 4-way valve will be delayed off 2 minutes after compressor stop. If the machine changes operation mode
from non-heating mode to heating mode, the 4-way valve will be turned off immediately. For defrosting, please
refer to the passage "defrosting mode".

8.11 Two speeds outdoor fan function

8.11.1 Outdoor fan action in heating mode(including heating in auto mode).
ΔT＞1℃
ΔT＜-1℃
Running mode
Cooling
Fan-only
Heating
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