Outline of Control (Outdoor Unit) < Symbols using in this manual >
Si33-105
90
Function R407C PLUS Series Heat Recovery System
"
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.
"
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
→
0pls
20S2=OFF
→
500pls
"
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
"
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)
Summary of Contents for R407C PLUS
Page 1: ...System R407C PLUS Series Heat Recovery System Si33 105 Service Manual ...
Page 11: ...Introduction Si33 105 x ...
Page 41: ...Specifications Si33 105 30 Specifications R407C PLUS Series Heat Recovery System ...
Page 147: ...Test Operation Si33 105 136 Test Operation R407C PLUS Series Heat Recovery System ...
Page 263: ...Si33 105 iv Index ...