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ESiEN09-06 A
Special Control
Function
29
3. Special Control
3.1
Startup Control
This control is used to equalize the pressure in the front and back of the compressor prior to the startup of the
compressor, thus reducing startup loads. Furthermore, the inverter is turned ON to charge the capacitor.
In addition, to avoid stresses to the compressor due to oil return or else after the startup, the following control is made
and the position of the four way valve is also determined. To position the four way valve, the master and slave units
simultaneously start up.
3.1.1 Startup Control in Cooling Operation
3.1.2 Startup Control in Heating Operation
Thermostat ON
Pressure equalization
control prior to startup
Startup control
STEP1
STEP2
Compressor
0 Hz
52 Hz
+ OFF + OFF
124 Hz + OFF + OFF
+2 steps/20 sec.
(until Pc - Pe>0.39MPa is achieved)
Outdoor unit fan
STEP4
Ta<20 C: OFF
Ta 20 C: STEP4
+1 step/15 sec. (when Pc>2.16MPa)
-1 step/15 sec. (when Pc<1.77MPa)
Four way valve (20S1)
Holds
OFF
OFF
Main motorized valve (EV1)
0 pls
480 pls
480 pls
Subcooling motorized valve
(EV2) (RXYQ8~)
0 pls
0 pls
0 pls
Hot gas bypass valve
(SVP)
OFF
OFF
OFF
Accumulator oil return valve
(SVO)
OFF
OFF
OFF
Injection (SVT) (RXYQ5P
model)
OFF
OFF
OFF
Ending conditions
A lapse of one minute
A lapse of 10 sec.
A lapse of 130 sec.
Pc - Pe>0.39MPa
OR
Thermostat ON
Pressure equalization
control prior to startup
Startup control
STEP1
STEP2
Compressor
0 Hz
52 Hz
+ OFF + OFF
124 Hz + OFF + OFF
+2 steps/20 sec.
(until Pc - Pe>0.39MPa is achieved)
Outdoor unit fan
STEP4
STEP8
STEP8
Four way valve
Holds
ON
ON
Main motorized valve (EV1)
0 pls
0 pls
0 pls
Subcooling motorized valve
(EV2) (RXYQ8~)
0 pls
0 pls
0 pls
Hot gas bypass valve
(SVP)
OFF
OFF
OFF
Accumulator oil return valve
(SVO)
OFF
OFF
OFF
Injection (SVT) (RXYQ5P
model)
OFF
OFF
OFF
Ending conditions
A lapse of one minute
A lapse of 10 sec.
A lapse of 130 sec.
Pc>2.70MPa
Pc-Pe>0.39MPa
OR
Summary of Contents for ERQ Series
Page 2: ......
Page 16: ...Combination Table ESiEN09 06 A 6 General Information...
Page 17: ...ESiEN09 06 A Specifications 7 1 Specifications 8 1 1 Outdoor Units 8...
Page 33: ...ESiEN09 06 A Function general Function 23 1 2 Operation Mode...
Page 58: ...Outline of Control ESiEN09 06 A 48 Function...
Page 71: ...ESiEN09 06 A Wiring Diagram of Control Box Control Box EKEQ CBV3 61 3 2 F box...
Page 109: ...Test Operation ESiEN09 06 A 100 Test Operation 1 2 2 Turn power on...