49 PB
TROUBLESHOOTING
Diagnostic Codes
Led Display
Error
Code
Power Timer Running
1 2 3 Content The root cause is may be one of the following
0 Normal
1 BLINK ON ON The failure for temperature
sensor of outdoor coil
a. The outdoor temperature sensor loose.
b. The outdoor temperature sensor failed.
c. The indoor control board failed
2 BLINK ON OFF Compressor exhaust
temperature sensor in
trouble
a. the compressor exhaust temperature sensor connect
loose.
b. the compressor exhaust temperature sensor failed.
c. the outdoor control board failed.
5 ON BLINK OFF IPM module protection a.The IPM board failed.
b.The outdoor fan is broken.
c.The outdoor fan motor failed
d.The outdoor fan has been blocked.
e.The condenser is dirty.
f.The outdoor unit has been installed below standards.
6 OFF BLINK OFF AC voltage higher or lower
protection
a. the supply voltage is higher or lower than normal.
b. the inner supply voltage of the unit is higher or lower
than normal.
7 ON ON OFF Communication failure
between the indoor unit
and outdoor unit
a.the communication cable connect loose.
b.the communication cable failed.
c.the connection between the lter board and the
outdoor control board is incorrect or loose.
d.the connection between the lter board and the
terminal is incorrect or loose.
e.the indoor control board failed.
f.the PFC board failed.
g.the power board failed.
h.the outdoor control board failed.
8 Current overload protection a.the fan motor runs abnormally.
b.the condensor and evaporator are dirty.
c.the air inlet and outlet is abnormal or obstructed.
9 Maximum current
protection
a.the outdoor control board is short circuited.
b.the drive board is short circuited.
c.ther components are short circuited.
10 ON OFF OFF Communication trouble
between outdoor unit and
driver
a. the connection wires connector loose.
b.the outdoor board or drive board failed.
11 BLINK OFF OFF Outdoor EEPROM in trouble a.the EEPROM chip is loose;
b.the EEPROM chip inserted in the opposite direction.
c.the EEPROM chip failed.
12 Outdoor ambient
temperature too low
protection
Outdoor ambient temperature too low.
13 BLINK OFF ON Compressor exhaust
temperature too high
protection
a.the compressor exhaust temperature sensor failed
b.the refrigerant chage is low.
14 ON ON BLINK Outdoor ambient
temperature sensor in
trouble
a.the outdoor ambient temperature sensor connector
is loose.
b.the outdoor ambient temperature sensor failed.
c.the outdoor control board failed.
15 OFF BLINK ON Compressor shell
temperature too high
protection
a.the compressor exhaust temperature sensor
connector loose.
b.the refrigerant charge is low.
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