Cooling Mode - Midea MS9A-09HRDN1-QC2 Service Manual

9.4.3 The action of auto fan in fan-only mode is the same as auto fan in cooling mode with 24℃ setting temperature.

9.5 Cooling Mode

9.5.1 After starting, the operation frequency of compressor submits to following rule.
When the machine is running and ΔT(=room temp. – setting temp.) changes, the frequency of compressor will
rise or descend a grade (7 minutes after starting).
After starting, if ΔT stays in a zone for 3 minutes, the frequency will change as follow:
Zone A : Current frequency rise a grade till the maximum grade F8.
Zone B: Keep the current frequency of compressor.
Zone C: Descend the current frequency of compressor until F1.
Zone D: Compressor stops after running as the minimum frequency F1 for 60 minutes or ΔT is less than -2℃.
9.5.2 Indoor heat exchanger anti-freezing function.
If T2 is lower than 0℃, the compressor stops and resumes when T2>5℃.
9.5.3 Outdoor unit current control in cooling mode(refer to the parameter table)
9.5.4 Rating capacity test function
1) Set the indoor unit with remote controller as: high fan, 17℃ in cooling mode, then press "TURBO" button
3.5
3.0
1.5
1.0
1.5
1.0
0.5
-0.5
-1.0
I3COOL
I2COOL
I1COOL
high
medium
low
A
B
C
D
comp. pause
freq. descends if curr. rises;
freq. remains if curr. descends
running normally
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