Heating Mode - Midea MSR1-24HRDN1-QC2W Service Manual

8.7 Heating mode

8.7.1 Indoor fan action:
1) Anti-cold-wind function.
2) If the compressor stops caused by room temperature rising, indoor fan will be forced to run 127
seconds with breeze. During this period, anti-cold-wind is disabled. After this, anti-cold –wind function is
available.
3) If the machine runs in rating capacity test mode, indoor fan runs with rating speed, and
anti-cold-wind is disabled.
8.7.2 Indoor fan speed can be set as high, medium, low or auto grade, but anti-cold-wind function is preferential.
Auto fan action in heating mode.
8.7.3 After start the operation frequency of compressor submits to following rule:
When the machine runs, if ∆Th stays in a zone for 3 minutes, action of frequency is as follow:
Zone A: Elevate the current frequency one grade, and not stop until the maximum grade.
Zone B: Keep the current frequency.
Zone C: Descend the current frequency one grade.
2.5
2.0
1.5
1.0
5.0
4.5
3.5
3.0
2.5
low
medium
high
D
C
B
A
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