Outline of Control
SiE-05C
246
Functions PLUS Series
When Heating
Indoor unit fan control
HPS operation for either STD outdoor unit 1 or 2
→
Fixed to L tap by thermostat ON unit only.
When Heating
Control IN conditions &
Emergency operation setting
Outdoor temperature detected to be above -5˚C
for STD outdoor unit 1
Step 1
Comp-
ressor
Outdoor
unit fan
Outdoor
unit EEV
Hot gas bypass
INV outdoor
unit
STD outdoor
unit 1
STD outdoor
unit 2
5 minutes elapse
0 Hz + OFF
H + ON
0 PLS
ON
ON + OFF
H + ON
SH control
OFF
ON + OFF
H + ON
SH control
OFF
Step 2
Comp-
ressor
Outdoor
unit fan
Outdoor
unit EEV
Hot gas bypass
INV outdoor
unit
STD outdoor
unit 1
STD outdoor
unit 2
0 Hz + OFF
H + ON
0 PLS
ON
ON + ON
H + ON
SH control
OFF
ON + ON
H + ON
SH control
OFF
Comp-
ressor
Outdoor
unit fan
Outdoor
unit EEV
Hot gas bypass
INV outdoor
unit
STD outdoor
unit 1
STD outdoor
unit 2
0 Hz + OFF
H + ON
0 PLS
OFF
ON + OFF
H + ON
2000 PLS
ON
ON + OFF
H + ON
2000 PLS
ON
Comp-
ressor
Outdoor
unit fan
Outdoor
unit EEV
Hot gas bypass
INV outdoor
unit
STD outdoor
unit 1
STD outdoor
unit 2
0 Hz + OFF
H + ON
0 PLS
OFF
ON + ON
H + ON
2000 PLS
ON
ON + ON
H + ON
2000 PLS
ON
OFF
ON
ON
: Operates No. 1 compressors only of STD outdoor unit 1 and 2.
Aperture of solenoid valves is fixed
for indoor units in this mode.
: Operates all compressors of STD outdoor unit 1 and 2.
Defrost
Oil return
: Heat exchange temp.
of any unit < -10˚C.
: Compressors operate total
of 70 min. following previous oil
return.
Oil return / defrost
:Operates by executing oil return for STD outdoor unit 1 and 2.
3 minutes 30 seconds elapse.
30 seconds elapse
Injection
Either malfunction, retry or outdoor temp.< -10˚C
Quit
step 2
step 1
Any unit executing
HPS operation
(VF125)
SI-05C.BOOK Page 246 Monday, November 6, 2000 4:13 PM
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