Daikin R407C PLUS, Service Manual

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Si33-105 Outline of Control (Outdoor Unit) < Symbols using in this manual >
Function R407C PLUS Series Heat Recovery System 49
3. Outline of Control (Outdoor Unit)
< Symbols using in this manual >
Apparatus No. Symbol Description
Y3S 20RH Discharge solenoid valve of BS unit
Y2S 20RL Suction solenoid valve of BS unit
Y1S 20RT Bypass solenoid valve of BS unit (liquid)
Y1R 20S1 4 way valve 1
Y2R 20S2 4 way valve 2
Y3R 20S3 4 way valve 3
52Ci Magnetic switch for INV compressor
DSH Discharge superheat
DSHi Discharge superheat of INV compressor
EV Electronic expansion valve
Y1E EV1 Electronic expansion valve of Heat EX.1
Y2E EV2 Electronic expansion valve of Heat EX.2
Y3E EV3 Electronic expansion valve of sub unit heat EX.
HDSHi Adjusted discharge superheat of INV compressor
HDSHs1 Adjusted discharge superheat of STD1 compressor
HDSHs2 Adjusted discharge superheat of STD2 compressor
SENPH Hp High pressure
HTdi Adjusted discharge pipe temperature of INV compressor
HTds1 Adjusted discharge pipe temperature of STD1 compressor
HTds2 Adjusted discharge pipe temperature of STD2 compressor
SENPL Lp Low pressure
SENPH Pc Condensing pressure
SENPL Pe Evaporating pressure
SH Superheat
SHS Target evaporator outlet superheat
Y2S SVP Bypass solenoid valve
Y1S SVS Solenoid valve for auxiliary condensor
Y3S SVTi Solenoid valve for INV comp. liquid injection
Y4S SVRVG Solenoid valve for liquid receiver
Y5S — Solenoid valve for liquid pressure control
Y6S SVTs1 Solenoid valve for STD1 comp. liquid injection
Y7S SVTs2 Solenoid valve for STD2 comp. liquid injection
R1T Ta Ambient temperature
R21T Tb1 Heat exchanger 1 distributor temperature
R22T Tb2 Heat exchanger 2 distributor temperature
R23T Tb3 Heat exchanger 3 distributor temperature
Tc High pressure equivalent saturation temperature
Tcg High pressure equivalent saturation temperature (gas side)
Tcl High pressure equivalent saturation temperature (liquid side)
Tcs Target Tc value
Td Discharge pipe temperature
R31T Tdi Discharge temperature of INV compressor
R32T Tds1 Discharge temperature of STD1 compressor
R33T Tds2 Discharge temperature of STD2 compressor
Te Low pressure equivalent saturation temperature
TeS Target Te value
T fin Inverter unit fin temperature
R1T Th1 Ambient temperature
R21, 22, 23T Th2 Heat exchange distributer temperature
R31T Th3-11 Discharge pipe temperature for INV compressor
R32, R33T Th3-12, 13 Discharge pipe temperature for STD1, 2 compressor
R41, 42, 43T Th4-11, 12, 13 Heat exchanger suction pipe temperature
R6T Th7 Accumulator outlet temperature
R8T Th8 Receiver outlet temperature
R6T Trac Accumulator outlet temperature
R8T Trev Receiver outlet temperature (liquid)
R41T Ts1 Heat exchanger 1 suction pipe temperature
R42T Ts2 Heat exchanger 2 suction pipe temperature
R43T Ts3 Heat exchanger 3 suction pipe temperature