Haier HSU18VH7 manual Table for Wrong Codes

Page 13

 

 

 

 

Air conditioner

Edition: 10070808

 

 

 

 

 

 

Table for Wrong Codes

 

 

 

 

 

 

 

 

 

 

Wrong express

reasons

Ways and means

solutions

tools

 

power timing operating

 

 

 

 

 

 

 

 

 

indoor ambient

Check the sensor of indoor ambient

 

 

 

 

 

 

temperature

temperature,if the resistance value is

see the following flow chart 1

 

 

 

★ ■ ■

 

sensor

Multimeter

 

 

 

 

abnormal

0 or ∞,the sensor is

 

 

 

 

 

 

abnormal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

indoor pipe

Check the sensor of indoor coilpipe

 

 

 

 

 

 

temperature

see the following flow chart 1

Multimeter

 

 

★ □ □

 

,if the resistance value is 0 or

 

 

 

sensor

 

 

 

 

∞,the sensor is abnormal.

 

 

 

 

 

 

abnormal

 

 

 

 

 

 

 

 

 

 

 

 

 

Indoor fan

Check whether indoor PCB or motor

 

 

 

motor don’t

see the following flow chart 2

Multimeter

 

is abnormal

 

 

 

 

feed back

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Data error or no

Check whether the EEPROM is

Change the indoor PCB

Multimeter

 

EEPROM

installed properly

 

 

 

 

 

 

 

 

 

 

 

onflashoff

 

 

 

chart 1: SENSOR MALFUNCTIONS

Firstly check whether Terminal CN8 on the indoor mainboard contact well or not?

YES

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

The Indoor PCB is broken

chart 2 Indoor fan motor malfunction

Check whether Terminal CN2 on the indoor mainboard is well inserted or not?

NO

NO

YES

YES

YES

Pull out the terminals on the indoor mainboard and reinsert them.

Replace with new sensor

Replace with new indoor PCB

Pull out and reinsert the terminals.

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

NO

the PCB of the indoor unit is damaged and needs replacing

YES

the motor of the indoor unit is damaged and needs replacing.

- 11-

Image 13
Contents Domestic Air conditioner Contents General information HSU18VH7 ~43 Basic Function Introduction to electrical control functions State1 State2 State3 Ts-1 Ts+2 Ts+3 OFF Ts+2 Ts+1 1 hours 6hours Hour Ts SleepOFF thour PCB 10070808 Table for Wrong Codes 10070808 10070808 10070808 Air conditioner Indoor unit 10070808 10070808 10070808 Wiring Diagram Indoor Unit Outdoor Unit RKΩ RKΩ HSU18VH7 Circuit Diagram