Daikin REYQ72-456XATJU, Service Manual

Page: 219 / 441

SiUS371901E Field Settings for Outdoor Unit
Field Settings and Test Operation 206
Next time graph shows the different steps during the power transistor check mode.
„
Switching sequence during power transistor check mode:
[2-29]: Capacity priority
When the night-time low noise operation is in use, performance of system might drop because airflow
rate of outdoor unit is reduced.
Default value: 0. Capacity priority cannot be used.
Field setting 1: Capacity priority can temporary cancel the night-time low noise operation. Capacity
priority can be initiated when certain operation parameters approach the safety setting:
„
Raise in high pressure during cooling.
„
Drop in low pressure during heating.
„
Raise of discharge pipe temperature.
„
Raise of inverter current.
„
Raise of fin temperature inverter PCB.
Power transistor check mode REYQ-XA
disconnect fasten U/V/W from compressor!
Step 1:
Set 2-28
0 1
Press RETURN
twice
Step 2:
Set 2-28
1 0
Press RETURN
twice
Check
1
Check
2
Check
3
Magnet
switch
K1M
ON
Magnet
switch
K1M OFF
Voltage
output
U/V/W
Voltage
output
U/V/W
Frequency: 10 Hz
note
∗
6 sec
3 sec
3 sec
30 sec
Check 4
Check
5
Check 1 : AC power input :
terminal L1B, L2B, L3B at REYQ72-120XATJU (208/230 V unbalance maximum 2%).
terminal L1D, L2D, L3D at REYQ144/168XATJU (208/230 V unbalance maximum 2%).
terminal L1B, L2B, L3B at REYQ-XAYDU (460 V unbalance maximum 2%).
terminal L1B, L2B, L3B at REYQ-XAYCU (575 V unbalance maximum 2%).
Check 2 : DC voltage :
connector X6A increase to ±260 VDC at REYQ72-120XATJU.
"C+, C-" on inverter PCB from opening hole increase to ±260 VDC at REYQ144/168XATJU.
connector X5A increase to ±600 VDC at REYQ-XAYDU.
connector X5A increase to ±750 VDC at REYQ-XAYCU.
Check 3 : DC = 1.42 x VAC power supply :
connector X6A at REYQ72-120XATJU.
"C+, C-" on inverter PCB from opening hole at REYQ144/168XATJU.
connector X5A at REYQ-XAYDU.
connector X5A at REYQ-XAYCU.
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 :
connector X6A increase to ±260 VDC at REYQ72-120XATJU.
"C+, C-" on inverter PCB from opening hole increase to ±260 VDC at REYQ144/168XATJU.
connector X5A increase to ±600 VDC at REYQ-XAYDU.
connector X5A increase to ±750 VDC at REYQ-XAYCU
note : Actual voltage value depends on multimeter characteristics.
∗
±57 VAC at REYQ-XATJU. ±115 VAC at REYQ-XAYDU. ±143 VAC at REYQ-XAYCU.