Daikin R407C PLUS - Page 101

Outline of Control (Outdoor Unit) < Symbols using in this manual > Si33-105
90 Function R407C PLUS Series Heat Recovery System
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1
Compressor frequency
Fix the frequency at 41Hz + OFF + (OFF) for the basic operation.
However, increase the compressor operation step with 4-way valve function assuring control to
ensure the function of the 4-way valve.
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2
Outdoor fan control
Regarding 24 to 34HP model, the fan (M12F) on the inverter box side stops if operating at fan
tap  or lower. Therefore, Tfin switches M12F to M11F.
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3
Indoor unit instruction cancellation conditions
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4
Indoor unit instruction cancellation conditions
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5
Opening degree of Ev (in 3 compressor system: EV3) on sub unit side
20S2=ON
→
0pls
20S2=OFF
→
500pls
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6
Indoor unit EV instruction
Instructed opening degree is shifted under the following conditions only on indoor unit with
cooling thermostat ON.
Th7-Te>40°C
→
1000pls
Th7-Te<15°C
→
200pls
∗
∗∗
∗
Initial status: 200pls
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7
Indoor unit fan instruction
LL tap instruction is conducted after the startup control ending until the following conditions are
met.
Step  Step  Step 0
Pc>1.17
Pc<0.98MPa
Pc>0.78MPa
Pc<0.59MPa
(V2590)
M11F = H / L / OFF
M12F = OFF
 
0
M11F = OFF
M12F = ON
Tfin>87˚C
Tfin<67˚C
(V2591)
OR
HP>1.47MPa
Startup control ending
(V2592)
OR
DSH>30
Th7-Te>10
LP<0.1MPa
(V2593)
OR
HP>1.47MPa
Elapsed time of 4 minutes after startup control ending
Compressor stop
Activates during preparation of defrosting and oil return operation
(V2594)