Troubleshooting
Page 76
For MOD01-23HFN1-MT0W:
There are three LED on outdoor PCB: LED1(Blue color), LED4(Red color) and LED3(Green color)
When the unit is standby, LED1 flashes at 0.5Hz. When the unit has some problems, it flashes at 2.5Hz. When operate normally, it
is on. When in low ambient cooling mode, it flashes 4 times then stops 4 seconds.
LED4(Red color) and LED3(Green color) refer to the following table:
LED4
(Red)
LED3
(Green)
Error Information Solution
on off
Normal operation Normal
off on
Normal standby Normal
Flash OFF
Compressor speed malfunction or outdoor fan speed malfunction Page 72/85
Flash On
Compressor driven chip EEPROM parameter error Page 84
on Flash
Zero speed protection of compressor/ outdoor fan or lack of phase
of compressor or outdoor fan
Page 85
ON on
DC voltage too high/too low protection Page 82
Flash Flash
IGBT strong current protection Page 87
off Flash
IPM module protection Page 78
Flash Flash
Communication error between outdoor main chip and compressor
driven chip
Page 86
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