Cooling Mode - Fisher FSIArt?100HFD Service Manual

8.5 Cooling Mode
8.5.1 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℃.
8.5.2 Indoor heat exchanger anti‐freezing function.
If T2 is lower than 0℃, the compressor stops and resumes when T2>5℃.
8.5.3 Outdoor unit current control in cooling mode.
8.5.4 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 cannot be turned into rating capacity test mode.
2) The machine will quit from the rating capacity test mode if running for 5 hours or changing fan speed or setting
temperature.
20
1 .5
1 .0
0 .5
‐0 .5
‐1.0
I3COOL
I2COOL
I1COOL
A
B
C
D
comp. pause
freq. descends if curr. rises;
freq. remains if curr. descends
running normally