Midea MSV1-09HRFN1-MT0W, Service Manual

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10.2 Outdoor unit error display
standby operating
LED1 slow flashing(0.2Hz) on
LED4 on on
The picture of PCB above is only for reference.
LED 4 is a red light and for the PCB POWER display.
LED 1 is a yellow light. After power on, it will be slow flash(0.2Hz) when the unit is in standby and quick
flash (2.5Hz) if the unit has some problems.
LED 6(green) and LED5 (red) are two lights controlled by the compressor drive chip. Below are
meanings for those lights.
No. Problems
LED6
(Green)
LED5
(Red)
IU display
1 standby for normal O X
2 Operation normally X O
3 IPM malfunction or IGBT over-strong current protection
☆
X P0
4 Over voltage or too low voltage protection O O P1
5 Over voltage or too low voltage protection O
☆
P1
6 Inverter compressor drive error X
☆
P4
7 Inverter compressor drive error
☆
O P4
8 Inverter compressor drive error
☆ ☆
P4
O
（
light
）
X
（
off
） ☆（
2.5Hz flash
）
LED1
(yellow)
LED4
(red)
LED5
(red)
& LED6
(green)