H2SM-14/18C03/R2
30
LED1 of outdoor pcb flashes once: outdoor EEPROM error: Replace the PCB of outdoor unit,
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LED1of outdoor pcb flashes twice: Outdoor ambient Sensor failure CN1,
YES
NO
YES
whether terminal CN1 on
outdoor PCB contact well?
Pull out the terminals on the outdoor mainboard and
reinsert them
Pull the sensor out of the mainboard
3) Measure the value of resistance Between its two
jumpers
4) Measure the temperature of
Outdoor ambient
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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