Table of Contents
[ III Outdoor Unit Components ]
3. INV board
SC-P2
Bus voltage Input(P)
Bus voltage check
terminal (P)
Note
IGBT
(Rear)
CN1
Bus voltage output
N
P
Bus voltage check
terminal (N)
Note 1
SC-L1
Input(L1)
SC-L2
Input(L2)
SC-L3
Input(L3)
CT3
Current sensor(L3)
1) Before inspecting the inside of the control box, turn off the power, keep the unit off for at least 10 minutes, and confirm that
the voltage between FT-P and FT-N on INV Board has dropped to DC20V or less.
It takes about 10 minutes to discharge electricity after the power supply is turned off.
HWE1113B
SC-P1
CN6
Rectifier diode output (P)
Open: No-load operation setting
Short-circuited: Normal setting
LED1
Lit: Inverter in normal operation
Blink: Inverter error
- 54 -
CN5V
RSH1
GND
Overcurrent detection
5VDC output
resistor
CT22
CT12
Current sensor(U)
Current sensor(W)
C30
C37
Smoothing capacitor
CN4
GND(Fan Board)
Serial communication
signal output
CN2
Serial communication
signal output
GND
17VDC input
CNTYP Inverter
board type
SC-V
Inverter output(V)
SC-W
Inverter output(W)
SC-U
Inverter output(U)
GB
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Table of Contents
Troubleshooting
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