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5
CONTROL
[1] Control of Outdoor Unit
(1)
Initial processing
• When turning on power source, initial processing of microcomputer is given top priority.
• During initial processing, control processing corresponding to operation signal is suspended. The control process-
ing is resumed after initial processing is completed. (Initial processing : Data processing in microcomputer and
initial setting of each LEV opening, requiring approx. 2 minutes at the maximum.)
(2)
Control at staring
• In case unit is started within 2 hours after turning on power source at low ambient temperature (+5˚C or less), the
unit does not start operating for 30 minutes at the maximum.
(3)
Bypass, capacity control
• Solenoid valve consists of bypass solenoid valve (SV1, SV2) bypassing between high pressure side and low
pressure sider. The following operation will be provided.
1)
Bypass solenoid valves SV1 and SV2 (both “open” when turned on)
• PU(H)Y-200·250YMF-C
: Y
• PU(H)Y-P200·250YMF-C : Y-P
• PURY-200·250YMF-C
: R2
• PURY-P200·250YMF-C
: R2-P
Item
When starting compressor
After thermost “ON is returned
and after 3 minutes restart
When compressor stops in
cooling or heating mode
After operation stops
During defrosting operations
During oil recovery opera-
tions
During 20Hz operations, at
fall in low pressure or low
pressure saturation tempera-
ture. (3minutes or more after
starting)
When high pressure rises
(Pd)
When high pressure rises
(Pd) during 20Hz operations
(3 minutes after starting)
When discharge temperature
rises
(3 minutes after starting)
SV1
ON (Open)
OFF (Close)
Turned on for 4 minutes
Turned on for 4 minutes
Always turned on
Turned on for 3 minutes
Always turned on
Always turned on.
Always turned on.
–
–
When Pd
reaches
27.5kg/cm
2
G
(2.70MPa) or
more
When Pd is
24kg/cm
2
G
(2.35MPa) or
less 30
seconds
SV2
ON (Open)
OFF (Close)
Turned on for 4 minutes
Turned on for 4 minutes
–
–
Always turned on.
Always turned on.
–
When Ps is 1.5kg/
cm
2
G (0.15MPa) or
less
When low TH2 is
–30˚C or less
When Pd reaches
26.5kg/cm
2
G
(2.60MPa) or more
When Pd reaches
25.5kg/cm
2
G
(2.50MPa) or more
Turned on when high
pressure (Pd) ex-
ceeds pressure limit
When temp. exceeds
130˚C and Pb
reaches 15kg/cm
2
G
(1.47MPa) or more
When Ps is 2.5kg/
cm
2
G (0.25MPa) or
more
When TH2 is
–15˚C or more
When Pd is 23.5kg/
cm
2
G (2.30MPa) or
less after 30 seconds
When Pd is 23kg/
cm
2
G (2.25MPa) or
less after 30 seconds
When high pressure
(Pd) is 20kg/cm
2
G
(1.96MPa) or less
When discharge
temp. is 115˚C or
less
Object
Y
Y-P
R2
R2-P
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Compressor
Bypass
solenoid
valve (SV1)
(4-minute)
(2-minute)
(4-minute)
(3-minute)
Start
Thermo.
OFF
Thermo.
ON
Defrost-
ing time
(*1)
Stop
