Pressure Equalizing Control Before Starting - Daikin VRV Inverter K Series Manual

SI-05C.BOOK Page 224 Monday, November 6, 2000 4:13 PM
Outline of Control
4.2

Pressure Equalizing Control Before Starting

If differential pressure remains when the compressor starts, starting current increases and the unit may
stop due to malfunction. In order to prevent this, the hot gas bypass valve is opened for a certain amount of
time just before the compressor starts to equalize the pressure between high and low pressure. After this
control is completed, the unit immediately enters soft control.
When cooling
When heating
∆T is a constant determined by outdoor temperature and Te.
<In Case of Cooling
Only System>
When cooling
224
Control contents
Hot gas bypass valve ON for INV
outdoor unit and STD outdoor unit 1
Control contents
Function unit's solenoid valveY5, Y6,
Y7 are ON
: http://splitoff.ru/tehn-doc.html
Required time
1 minute
2 minutes. However, requires 3 minutes if Tc-Te > ∆T
when 1 minute elapses.
Required time
1 minute
Functions PLUS Series
SiE-05C