Daikin VRV S RXMQ10ARY1, Service Manual

Page: 144 / 377

Field Settings for Outdoor Unit (6/8 HP Models) SiAF332111E
138 Part 5 Field Settings and Test Operation
 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:
 Line (for RXMQ6AR) or all 3 phases (for RXMQ8AR) and neutral are available, and

Inverter circuit is active. Check if the green LED “HBP” on the main PCB (for
RXMQ6AR) or "HAP" on the inverter PCB (for RXMQ8AR) is blinking normally
(approximately 1/second). If LED is 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 PCB, change related setting immediately back to set
0 to deactivate related function.
 Diode module generates the required 300 VDC (for RXMQ6AR) or 500 VDC (for
RXMQ8AR).

Cautions:
 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.
 Below time graphs show the different steps during the power transistor check mode.
 Switching sequence during power transistor check mode:
RXMQ6AR
Check 1 : AC power input (L, N on X1M: power supply terminal block) around 220 V
Check 2 : DC voltage on inverter circuit capacitor (C+,C–) increases to around 310 V.
Check 3 : VDC = 1.42 × VAC power supply (calculation from Check 1 and Check 2 )
Check 4 : AC U/V/W 10 rps intermediate (at fasten U/V/W) around 10 V
Check 5 : DC voltage drop (discharge inverter circuit capacitor DC) check difference between “C+, C–” within 2
LED (V phase) brightness reduce till off.
*Note: Actual voltage value depends on meter characteristics.
Check 3 Check 2 Check 1
Frequency 10 rps
Power transistor check
mode activate;
Mode 2-28 set 0
Ѝ
1
VAC [U/V/W]
Power transistor check
mode activate;
Mode 2-28 set 1
Ѝ
0
VDC [C+/C–]
(310 VAC)
60 VAC
Check 4 Check 5
About 6 minutes
Power supply
OFF
VAC
L/N
VDC
C+/C–
VDC =
1.42 × VAC
VAC
U/V/W
Disconnect U/V/W from compressor before
performing the power transistor check.
VDC
C+/C–
Time