Fan-Only Mode; Cooling Mode - Toyotomi MTN-MTG 256DV Service Manual

9.4 Fan-Only Mode

9.4.1 Temperature setting function is disabled, and no setting temperature display.
9.4.2 In this mode, the action of louver is the same as in cooling mode.
9.4.3 The action of auto fan in fan-only mode is the same as auto fan in cooling mode with 24
temperature.

9.5 Cooling Mode

9.5.1 The operation frequency of compressor after starting 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.
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
setting
24