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 0Ѝ1
VAC [U/V/W]
Power transistor check
mode activate;
Mode 2-28 set 1Ѝ0
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
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