Daikin R407C PLUS, Service Manual

Page: 72 / 267

Si33-105 Outline of Control (Outdoor Unit) < Symbols using in this manual >
Function R407C PLUS Series Heat Recovery System 61
"
1
Compressor frequency
Fix the frequency at 41Hz + OFF + (OFF) for the basic operation.
However, increase the compressor operation step with 4-way valve operation ensuring control
to ensure the operation of the 4-way valve.
"
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.
"
3
Indoor unit instruction cancellation conditions
"
4
Indoor unit instruction cancellation conditions
"
5
Opening degree of Ev (in 3 compressor system: EV3) on sub unit side
20S2=ON
→
0 pls
20S2=OFF
→
500 pls
"
6
EV instruction to indoor unit
Instructed opening degree is shifted under the following conditions only on indoor unit with
cooling thermostat ON.
Th7-Te>40°C
→
1000 pls
Th7-Te<15°C
→
200 pls
" Initial status: 200 pls
"
7
Fan instruction to indoor unit
LL tap instruction is conducted after the startup control ending until the following conditions are
met.
Step Step Step 0
Pc>1.18MPa
Pc<0.98MPa Pc<0.59MPa
Pc>0.78MPa
Note : Initial step is Step 0.
(V2569)
M11F = H / L / OFF
M12F = OFF
0
M11F = OFF
M12F = ON
Tfin>87˚C
Tfin<67˚C
(V2570)
OR
HP>1.47MPa
Startup control ending
(V2571)
OR
DSH>30
Th7-Te>10
LP<0.098MPa
(V2572)
OR
OR HP>1.47MPa
Elapsed time of 4 minutes after startup control ending
Compressor stop
Activates during preparation of defrosting and oil return operation
(V2573)