H2SM-14/18C03/R2
28
Codes and Description
Code indication
indoor
Description
Outdoor led1
blinks times
Power timer operate
Operate heating cooling
★ ■ ■
Room temperature sensor failure --
★ □ □
Heat-exchange sensor failure --
★ □ ★
Indoor EEPROM error ---
■ □ ★
Indoor fan motor malfunction --
Indoor
Malfunction
■ ■ ★ Communication Error (between indoor and outdoor unit)
3 or 7
outdoor EEPROM error 1
★ □ ■ Outdoor Senistor Error
2
outdoor unit A’s coil sensor failure
5
Outdoor
Malfunction
outdoor unit B’s coil sensor failure
9
explanation □on★flash■off
Trouble Shooting
★ ■ ■: Room temperature sensor failure CN8
★ □ □: Heat-exchange sensor failure CN8
YES
NO
YES
whether terminal CN8 on
indoor PCB contact wellt?
Pull out the terminals on the indoor mainboard and
reinsert them
Pull the sensor out of the mainboard
1) Measure the value of resistance Between its two
jumpers
2) Measure the temperature at the room temperature
sensing head.
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 indoor PCB is broken, replace with new indoor PCB
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