York YHKMXH009BARX-FX Service Manual page 248

YHEJXH028~48BARX-GX YHGJXH048~60BARX-GX YHKMXH009~18BARX-FX
YHKMXH024~48BARX-FX YHKMXH060BARX-FX YHFMXH012~24BARX-FX
YHFMXH028~48BARX-FX YHFMXH060BARX-FX
LED flash times
Wired
of indoor PCB
controller
LED4 LED3 display
0 1 01
0 2 02
0 4 04
0 7 07
0 8
0 12 0C
0 13 0D
0 16 10
21 15
22 16
24 18
25 19
27 1B
28 1C
29 1D
30 1E
31 1F
32 20
33 21
35 23
36 24
37 25
38 26
39 27
43 2B
44 2C
47 2F
48 30
49 31
58 3A
59 3B
63 3F
64 40
Note:
1.The outdoor failure can also be indicated by the indoor unit,the checking method as follo- ws: LED4 flash times stands for
tens digit,and LED3 flash times stands for units digit, use this bidigitate figure minus 20,then will get the outdoor error code.
For example,if the outdoor error code is 15,LED4 will flash 3 times firstly,two seconds later,LED3 will flash 5 times , and four
seconds later the process will repeat again.
2.LED4 is a yellow one on the indoor PCB,LED3 is a green one.
3.To get much more details about the out door unit failure,please refer to the outdoor unit trouble shooting list.
INDOOR UNIT TROUBLE SHOOTING
Contents of Malfunction
Malfunction of indoor unit ambient
temper- ature sensor
Malfunction of indoor unit piping
temper- ature sensor
EEPROM wrong of indoor PCB
Abnormal communi- cation between
indo- or and outdoor units
Abnormal communi- cation between
/
wired controller and indoor unit
Malfunction of drain system
Zero cross sigal wrong
Indoor abnormal mode operation
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Outdoor unit abnormal
Sensor disconected,or broken,or at wrong position,or
short circuit
Sensor disconected,or brok- en,or at wrong position,or
short circuit
EEPROM chip disconected or broken or wrong
programmed,or PCB broken
Wrong connection,or the wires be disconected or wrong
adress setting of indoor unit or faulty power supply or
faulty PCB or slave unit malfunction in MAXI system
Wrong connection or wired controller broken,or PCB
faulty
Pump motor disconnected or at wrong position,or the
float switch,disconnected,or at wrong position,or the
short circuit bridge disconneted
Zero cross sigal detected wrong
Different from outdoor unit mode
Refer to the outdoor unit troubleshooting list
246
Possible reasons