Cooling Mode - Midea MSC-18HRDN1-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 ∆T(=room temp. – setting temp.) changes, the frequency of compressor will
rise or descend a grade (7 minutes after starting).
After start, if ∆T stays in a zone for 3 minutes, the frequency will change as follow:
Zone A : Current frequency rise a grade till the maximum grade.
Zone B: Elevate or keep or descend the frequency of compressor.
Zone H: Compressor stops after running as the minimum frequency for 60 minutes or ∆T 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)
Remark:
MSC-18HRDN1-QC2
MSH-18HRDN1-QC2
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 on
℃
3.5
3.0
1.5
1.0
3.5
3.0
-0.5
-1.0
I3COOL
I2COOL
I1COOL
I1COOL
9.5 A
9.5 A
high
medium
low
A
B
H
comp. pause
freq. descends if curr. rises;
freq. remains if curr. descends
running normally
I2COOL I3COOL
10.5 A
10.5 A
13 A
13A
23