Daikin RXYQ-TA Series Service Manual page 162

Field Settings for Outdoor Unit
Next time graph shows the different steps during the power transistor check mode.
Switching sequence during power transistor check mode:
step1:
mode 2
code 28
set 01 02
"Return" 2x
Check Check
1
Check 1 : AC power input (connector X10A on A2P: inverter compressor) 380-415 V
Check 2 : relay "K1M" on inverter PCB switches : check DC voltage on P&N increase to
Check 3 : DC = 1.42 x VAC power supply L1-L3 : check at connector X3A (8-12 HP), or
Check 4 : AC UVW 10 Hz intermediate : check difference within 10 V (at fasten U/V/W)
Check 5 : AC UVW 240 Hz continuous output while voltage drop (discharge capacitors DC)
∗note : actual voltage value depends on meter characteristics
[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.
149
Power transistor check mode RXYQ-TA
disconnect fasten U/V/W from compressor!
Voltage
Magnet
output
sw.
U-V-W
K1M
ON
±100
VAC
note∗
Check
±6 sec
2 3
Voltage
output
U-V-W
Magnet sw.
±170
K1M OFF
VAC
note∗
±3 sec
unbalance max.2%.
±500 VDC.
X5,6A (14-20 HP).
check difference between UVW within 10 V. 2 LEDs (V phase) brightness reduce
till of.
Check 4
Frequency: 10 Hz
±3 sec
Check 5
Frequency: 240 Hz
±30 sec
SiUS341615E
step 2:
mode 2 - code 28
set 02 01+"Return
2x OR exit mode 2
("mode" button)
±60 VAC
note∗
Field Settings