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Air conditioner Edition: 10070808
- 11-
Table for Wrong Codes
Wrong express
power timing operating
★
■
■
indoor ambient
temperature
sensor
abnormal
Check the sensor of indoor ambient
temperature,if the resistance value is
0 or
∞,the sensor is
abnormal.
see the following flow chart 1
Multimeter
★
□
□
indoor pipe
temperature
sensor
abnormal
Check the sensor of indoor coilpipe
,if the resistance value is 0 or
∞,the sensor is abnormal.
see the following flow chart 1
Multimeter
★ □ ★
Data error or no
EEPROM
Check whether the EEPROM is
installed properly
Change the indoor PCB Multimeter
reasons
Ways and means
solutions
tools
□
on
★
flash
■
off
■ □ ★
Indoor fan
motor don’t
feed back
Check whether indoor PCB or motor
is abnormal
see the following flow chart 2
Multimeter
chart 1: SENSOR MALFUNCTIONS
YES
YES
NO
Pull out the terminals on the indoor
mainboard and reinsert them.
Replace with new sensor
Replace with new indoor PCB
The Indoor PCB is broken
YES
Firstly check whether Terminal CN8 on
the indoor mainboard contact well or not?
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 specifications of the sensor to decide whether the sensor is damaged or not?
NO
chart 2 Indoor fan motor malfunction
NO
NO
the PCB of the indoor unit is damaged and needs replacing
Pull out and reinsert the terminals.
YES
Check whether Terminal CN2 on the indoor mainboard is well inserted or not?
Electrify the machine again and turn it on in the Cool state with the remote controller.
Measure the voltage between 1 and 4 of Terminal CN2 about DC150-380V,Measure the
voltage between 5 and 4 of Terminal CN2 on the indoor mainboard about DC13-16.5V.
Measure the voltage between 7 and 4 of Terminal CN2 about 1-6.5v
the motor of the indoor
unit is damaged and needs
replacing.
YES