Daikin RXQ12AHR Service Manual page 152

Field Settings for Outdoor Unit
Step 1:
Mode 2-28
Set 01 02, then
press "Return" twice
Check 1 Check 2
Magnectic
K1M OFF
Check 1 : AC power input (connector X10A on A2P: inverter compressor) 380-415 V
unbalance max. 2%.
Check 2 : relay "K1M" on inverter PCB switches: check DC voltage on P&N increase to
±500 VDC.
Check 3 : DC = 1.42 x VAC power supply L1-L3: check at connector X3A (8-12 HP), or
X5A, X6A (14-20 HP).
Check 4 : AC U/V/W 10 Hz intermediate: check difference within 10 V (at fasten U/V/W)
Check 5 : AC U/V/W 240 Hz continuous output while voltage drop (discharge capacitors
DC) check difference between U/V/W within 10 V. 2 LEDs (V phase) brightness
reduce until OFF.
*Note: Actual voltage value depends on meter characteristics
 m2-29: Capacity priority. When the night-time low noise operation is in use, performance of
146
 In case there is more than 1 compressor in a system (outdoor is 14 HP or larger, or
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 earth 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:
Disconnect U/V/W from compressor before
performing the power transistor check.
Voltage
output
Magnectic
U/V/W
switch (K1M)
ON
±100V
AC*
Check 3 ±6 sec
Voltage
output
U/V/W
switch
±170
VAC*
±3 sec
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.
 Raise of discharge pipe temperature.
 Raise of inverter current.
 Raise of fin temperature inverter PCB.
Check 4
Frequency: 10 Hz
±3 sec
Check 5
Frequency: 240 Hz
±30 sec
Part 5 Field Settings and Test Operation
SiAF341904E
Step 2:
Mode 2-28
Set 02 01, then
press "Return" twice
OR press "MODE" button
±60 VAC*