Daikin RXQ12AHR Service Manual page 151

SiAF341904E
 m2-26: Start time automatic night-time low noise operation. When the auto night-time low
 m2-27: Stop time automatic night-time low noise operation. When the auto night-time low
 m2-28: Power transistor check mode. To evaluate the output of the power transistors. Use
Part 5 Field Settings and Test Operation
noise operation is active (refer to field setting 2-22) outdoor will start when start time is
reached time is reached. The time judgement is taken from outdoor air tendency.
*When the outdoor air temperature becomes highest,
the unit is sensed as 2:00 PM
100
50
0
58
Max.8 dB reduced
(10 HP)
50
8:00 AM 12:00 PM
 Default value: 2 (10:00 PM)
 Field setting 1: 8:00 PM, 3: 12:00 AM (midnight).
noise operation is active (refer to field setting 2-22), outdoor unit will stop the night-time low
noise operation level automatically when stop time is reached.
 Default value: 3 (8:00 AM)
 Field setting 1: 6:00 AM, 2: 7:00 AM
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 until 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:
4:00 PM 8:00 PM 12:00 AM
Night mode
starts
Field Settings for Outdoor Unit
Night mode
ends
4:00 AM 8:00 AM
145