Cooling Mode - Toyotomi Kuro MTN A228DV Service Manual

9.5 Cooling Mode

9.5.1
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 start, 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.
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 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.
Remark:
9K Model
12K Model
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 controller 6 times or more within 10 seconds(make sure indoor unit receives these signals), the machine
will turn into rating capacity test mode, the buzzer will make a "di" sound for 2 seconds continuously.
Also,
indoor fan will change to rating speed, the frequency of compressor will be fixed as rating value. Any
condition of above is not satisfied, the machine can not be turned into rating capacity test mode.
The operation frequency of compressor after starting submits to following rule.
3.5
3.0
-0.5
-1.0
I3COOL
I2COOL
I1COOL
I1COOL
4.5A
5.2A
A
comp. pause
freq. descends if curr. rises;
freq. remains if curr. descends
running normally
I2COOL I3COOL
6.0 A
6.4 A
B
H
7.0 A
7.5 A
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