Daikin EWAQ016BAW, Руководство по обслуживанию

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ESIE11-05 Special Control
Functional Description 47
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 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
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 electronic expansion
valve (EV1)
0 pls 480 pls 480 pls
Subcooling electronic
expansion valve (EV2)
(EW*Q016BAW*)
0 pls 0 pls 0 pls
Hot gas bypass valve
(SVP)
OFF OFF OFF
Accumulator oil return valve
(SVO)
OFF OFF OFF
Ending conditions A lapse of one minute A lapse of 10 sec.

A lapse of 130 sec.

Pc - Pe>0.39MPa
Hydrobox expansion valve
K11E & K12E
0 pls 0 pls PI control
OR