Haier HSU09VHJ Service Manual page 60

Pull out the exhaust sensor and measure its
resistance at standard
according to the resistance-temperature table
the results deviate
much?
The outdoor mainboard is damaged and
needs be replaced
7. .7
The EEPROM Abnormality (Indoor or outdoor unit)
the Data detected by the EEPROM are used to determine MCU
when the Data of EEPROM is error or the EEPROM is damaged
Check whether LED1 on
the outdoor unit blinks 1
times
the indoor
damaged,
replacing with a new one
HSU09VHJ DB -SM
temperatures
YES
NO
: Indoor EEPROM error
Outdoor EEPROM error
Faulty EEPROM data
Faulty EEPROM
Faulty PCB
Be sure to turn off power switch before connect or disconnect connector,
parts damage may be occurred.
NO
mainboard is
and needs
NO
The sensor is damaged. Replace the sensor
with a new one.
YES
The sensor is damaged. Replace the sensor
with a new one.
YES
The outdoor mainboard
is damaged. Replace it
with a new one.
58
Service Diagnosis
Domestic Air Conditioner
or