SiUS341615E
Field Settings for Outdoor Unit
Field Settings
148
[2-26]: Night-time low noise operation start time
This setting is used in conjunction with setting [2-22].
[2-27]: Night-time low noise operation stop time
This setting is used in conjunction with setting [2-22].
[2-28]: 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 inverter 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 inverter 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
Make shortly 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 500 VDC.
Cautions:
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.
Value
[2-26]
Start time automatic night-time low noise
operation (approximately)
1
20:00
2 (default)
22:00
3
24:00
Value
[2-27]
Start time automatic night-time low noise
operation (approximately)
1
6:00
2
7:00
3 (default)
8:00
Summary of Contents for RXYQ-TA Series
Page 1: ...Service Manual SiUS341615E RXYQ72 408TAYDU RXYQ72 408TATJU Heat Pump 60 Hz...
Page 321: ...SiUS341615E Wiring Diagrams Appendix 308 RXYQ96 120TAYDU 2D106439A...
Page 322: ...Wiring Diagrams SiUS341615E 309 Appendix RXYQ144 168TAYDU 2D106440A...
Page 323: ...SiUS341615E Wiring Diagrams Appendix 310 RXYQ72TATJU 3D106435A...
Page 324: ...Wiring Diagrams SiUS341615E 311 Appendix RXYQ96 120TATJU 2D106436A...
Page 325: ...SiUS341615E Wiring Diagrams Appendix 312 RXYQ144 168TATJU 2D106437A...
Page 335: ...SiUS341615E Wiring Diagrams Appendix 322 VAM1200GVJU 3D073270C...
Page 336: ...Revision History Month Year Version Revised contents 02 2017 SiUS341615E First edition...
