Pressure Equalization Prior To Startup - Daikin FCQ18PVJU Service Manual

SiUS28-902_a
3.7

Pressure Equalization Prior to Startup

Before activating the compressor, the activation load is lightened by equalization across the
compressor. In addition, inverters turn on electricity and capacitors are charged.
Actuator
Compressor
Outdoor unit fan
Four-way valve
Main electronic expansion valve (EV1)
Subcooling electronic expansion valve (EV2)
Hot gas bypass valve (SVP)
Receiver gas discharging valve (SVG)
Ending conditions
Function
Operation
OFF
Cooling:OFF
Heating:Ta>78.8°F; STEP 8,
Ta≤78.8°F; OFF
Keep former condition.
0 pls
0 pls
ON
OFF
• • 3 min.
or
• • Pc-Pe<29 psi
Special Control
Remarks
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