H2SM-14/18C03/R2
32
LED1 of outdoor pcb flashes 5 or 9 times outdoor unit A or B’s coi sensor failure CN2
YES
NO
YES
whether terminal CN2 on
outdoor PCB contact well?
Pull out the terminals on the outdoor mainboard and
reinsert them
Pull the sensor out of the mainboard
5) Measure the value of resistance Between its two
jumpers
6) Measure the temperature of
outdoor unit A or
B’s coi
Check the value of the
sensor to see whether the
sensor is dama
ged or not?
NO
Sensor is broken,replace it with new sensor
The outdoor PCB is broken, replace a new one
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