Daikin VRV Aurora RXLQ-TATJU Series Service Manual page 193

SiUS341802EC
Step 1:
Set 2-28
0 1
Press RETURN
twice
Check Check
1 2
Magnet
K1M OFF
Check 1 : AC power input:
at terminals L1B, L2B, L3B for RXLQ72TATJ* and RXLQ72TBTJ* (208/230 V unbalance maximum 2%).
at terminals L1D, L2D, L3D for RXLQ96/120TATJ* and RXLQ96/120TBTJ* (208/230 V unbalance maximum 2%).
at terminals L1B, L2B, L3B for RXLQ-TAYD* and RXLQ-TBYD* (460 V unbalance maximum 2%).
at terminals L1B, L2B, L3B for RXLQ-TAYC*, RXLQ-TBYC*, and RXYQ-TAYC* (575 V unbalance maximum 2%).
Check 2 : DC voltage:
at connector X6A increases to ±260 VDC for RXLQ72TATJ* and RXLQ72TBTJ*.
C+, C– on inverter PCB from opening hole increases to ±260 VDC for RXLQ96/120TATJ* and RXLQ96/120TBTJ*.
at connector X5A increases to ±600 VDC for RXLQ-TAYD* and RXLQ-TBYD*.
at connector X5A increases to ±750 VDC for RXLQ-TAYC*, RXLQ-TBYC*, and RXYQ-TAYC*.
Check 3 : DC = 1.42 x VAC power supply:
at connector X6A for RXLQ72TATJ* and RXLQ72TBTJ*.
C+, C– on inverter PCB from opening hole for RXLQ96/120TATJ* and RXLQ96/120TBTJ*.
at connector X5A for RXLQ-TAYD* and RXLQ-TBYD*.
at connector X5A for RXLQ-TAYC*, RXLQ-TBYC*, and RXYQ-TAYC*.
Check 4 : AC U/V/W 10 Hz intermediate:
check difference within 10 V (at fasten U/V/W)
Check 5 : Voltage drop (discharge capacitors DC)
Check DC voltage:
at connector X6A increases to ±260 VDC for RXLQ72TATJ* and RXLQ72TBTJ*.
C+, C– on inverter PCB from opening hole increase to ±260 VDC for RXLQ96/120TATJ* and RXLQ96/120TBTJ*.
at connector X5A increases to ±600 VDC for RXLQ-TAYD* and RXLQ-TBYD*.
at connector X5A increases to ±750 VDC for RXLQ-TAYC*, RXLQ-TBYC*, and RXYQ-TAYC*.
Note(s)
Actual voltage value depends on multimeter characteristics:
 ±57 VAC for RXLQ-TATJ* and RXLQ-TBTJ*, ±115 VAC for RXLQ-TAYD* and RXLQ-TBYD*, and
±143 VAC for RXLQ-TAYC*, RXLQ-TBYC*, and RXYQ-TAYC*.
Part 5 Field Settings and Test Operation
Cautions:
 In case there is more than 1 compressor in a system (outdoor is multi outdoor
configuration) all compressor inverter PCBs will perform the power transistor check. In
such case, disconnect U/V/W fasten terminals on all compressors. Avoid accidental
touch of fasten terminals to short circuit or ground leak to casing.
 To stop the power transistor check mode, change setting to default 2-28-0.
 Output to U/V/W will also stop when outdoor unit main PCB decides standby mode of
inverter circuit.
Next time graph shows the different steps during the power transistor check mode.
 Switching sequence during power transistor check mode:
Power transistor check mode
disconnect fastened U/V/W from compressor!
Voltage
Magnet
output
switch
U/V/W
K1M
ON
note
Check
6 sec
3
Voltage
output
U/V/W
switch
3 sec
Check 4
Frequency: 10 Hz
3 sec
30 sec
Field Setting from Outdoor Unit
Step 2:
Set 2-28
1 0
Press RETURN
twice
Check
5
186