Daikin RXYQ96PYDN, Руководство по обслуживанию

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Special Control SiUS34-801A_b
202 VRVIII R-410A Heat Recovery 60Hz
7.3.2 Heating Oil Return Operation (including cooling / heating simultaneous
operation)
[Start conditions]
Referring to the following conditions, start heating oil return operation.
• Integral oil rise rate is reached to specified level.
• When cumulative compressor operating time exceeds 8 hours (2 hours when the power supply turns ON for the
first time)
Furthermore, the integral oil rise rate is calculated by Tc, Te, and compressor loads.
The higher the compressor operating step No., the cumulative refrigerant oil consumption increases.
*1: In case of multi outdoor unit system:
Master unit: It conducts the operation listed in the table above.
Slave units: Operating units conduct the operation listed in the table above.
Non-operating units conduct the operation listed in the table above after the Oil Returning process. Non-
operating units stop while in Preparation mode.
Actuator Symbol
Elect. symbol
Oil return operation
REYQ REMQ
Compressor 1
—
M1C M1C
Maintain load that was applied before oil return operation.
When current circulation rate < circulation rate required for
oil return operation, turn ON the STD compressor every 10
seconds (up to 3 units at maximum).
Compressor 2 M2C M2C
Outdoor unit fan 1
—
M1F M1F
When outdoor unit heat exchanger is condenser, the fan
will run under cooling fan control.
When outdoor unit heat exchanger is evaporator, the fan
will run at the fan step 7 or 8.
Outdoor unit fan 2 M2F M2F
Electronic expansion valve (main) EVM
Y1E
Y3E
Y1E
20SA=ON : PI control
20SA=OFF : 418pls
Electronic expansion valve
(subcooling)
EVT
Y2E
Y5E
Y3E PI control
Electronic expansion valve (refilling
refrigerant)
EVJ Y4E Y2E 80pls
Four-way valve (for heat changer
selection)
20SA
Y2S
Y9S
Y3S
When outdoor unit heat exchanger is condenser, the valve
will turn OFF.
When outdoor unit heat exchanger is evaporator, the valve
will turn ON.
Four-way valve (for high- and low-
pressure gas pipe selection)
20SB Y8S Y2S OFF
Solenoid valve (main bypass) SVE
Y5S
Y10S
Y6S OFF
Solenoid valve (hot gas) SVP Y4S Y5S 0pls
Solenoid valve (liquid pipe of
refrigerant regulator)
SVL Y3S Y4S 0pls
Solenoid valve (gas discharge pipe of
refrigerant regulator)
SVG Y1S Y1S 0pls
Solenoid valve (drain pipe of
refrigerant regulator)
SVO Y7S Y7S 0pls
Solenoid valve (discharge pipe of
refrigerant regulator)
SVT Y6S Y8S 0pls
End conditions
•
Pe_min<31.9psi
•
After a lapse of 9 min.
OR
or