Daikin VRV Aurora RXLQ-TATJU Series Service Manual page 192

Field Setting from Outdoor Unit
[2-26]:
This setting is used in conjunction with setting [2-22].
[2-27]:
This setting is used in conjunction with setting [2-22].
[2-28]:
185
Night-time low noise operation start time
Change [2-26] to 1, 2 or 3 in function of required timing.
Default value: 2
Value Start time automatic night-time low noise
[2-26]
1
2 (default)
3
Night-time low noise operation stop time
Default value: 3
Value Stop time automatic night-time low noise
[2-27]
1
2
3 (default)
Power transistor check mode
To evaluate the output of the power transistors. Use this function in case error code is
displayed related to defective inverter PCB or compressor is locked.
Default value: 0. Power transistor check mode is not active.
Field setting 1: Power transistor check mode is active.
Function:
 Inverter PCB gives output of 10 Hz in sequence by all 6 transistors. Remove the
U/V/W terminals of the compressor, and connect to the inverter checker module. If all 6
LEDs blink, the transistors switch correctly.
 When the power transistor check mode is interrupted, after internal power circuit is
disconnected on the inverter PCB, 2 LEDs will light up to indicate discharge of the DC
voltage. Wait till the LEDs are OFF before returning fasten terminals back to the
compressor terminals.
Minimum requirements to refer to the result on the inverter checker module:
 All 3 phases and neutral are available, and
 Inverter PCB control is active. Check if the green LED HAP on the inverter PCBs are
blinking normal (approx. 1/second). If LEDs are OFF, need to exit the standby mode of
the inverter:
 Disconnect and reconnect power supply control PCB, or
 Forced thermostat ON condition, or
 Briefly set 2-6-1 (forced thermostat ON indoor), or 2-20-1 (manual refrigerant charge).
 Once the LED is blinking on the inverter PCB, change related setting immediately
back to set 0 to deactivate related function.
 Diode module generates the required 260 VDC for RXLQ-TATJ* and RXLQ-TBTJ*,
600 VDC for RXLQ-TAYD* and RXLQ-TBYD*, or 750 VDC for RXLQ-TAYC*,
RXLQ-TBYC*, and RXYQ-TAYC*.
operation (approximately)
About 8:00 PM
About 10:00 PM
About 12:00 AM
operation (approximately)
About 6:00 AM
About 7:00 AM
About 8:00 AM
SiUS341802EC
Part 5 Field Settings and Test Operation