47 PB
TROUBLESHOOTING
Diagnostic Codes
Indoor Unit
Error
Code
Power Timer Running Sleep
1 2 3 4 Content The root cause is may be one of the following
9 OFF OFF BLINK OFF Maximum current
protection
a.the outdoor control board is short circuited.
b.the drive board is short circuited.
c. other components are short circuited.
10 OFF OFF BLINK ON Communication trouble
between outdoor unit and
driver
a. the connection wires loose.
b.the outdoor board or drive board failed.
11 OFF ON BLINK OFF Outdoor EEPROM in trouble a.the EEPROM chip is loose.
b.the EEPROM chip inserted incorrectly.
c.the EEPROM chip failed.
12 OFF ON BLINK ON Outdoor ambient
temperature too low
protection
Outdoor ambient temperature too low.
13 ON OFF BLINK OFF Compressor exhaust
temperature too high
protection
a.the compressor exhaust temperature sensor
failed.
b.the unit refrigerant charge is low
14 ON OFF BLINK ON Outdoor ambient
temperature sensor failure.
a.the outdoor ambient temperature sensor
connector loose
b.the outdoor ambient temperature sensor
failed.;
c.the outdoor control board failed.
15 ON ON BLINK OFF Compressor shell
temperature too high
protection
a.the compressor exhaust temperature sensor
connector loose.
b.the unit refrigerant charge is low.
16 Anti-freeze protection
with cooling or overload
protection with heating in
a.the indoor coil temperature sensor
connector loose;
b.the indoor coil temperature sensor failed..
c.the indoor control board failed..
d. the refrigerant system is abnormal
17 PFC protection a.the PFC failed.;
b.the outdoor drive board failed.
18 DC compressor start
failure
a.the outdoor drive board failed.;
b.the compressor failed.
19 OFF OFF OFF BLINK Compressor drive failure. a.the o utdo or dri ve b o ard fa iled.;
b.the compressor failed.
c. the outdoor control board failed.
20 ON OFF OFF BLINK Outdoor fan motor locked
rotor protection.
a.the connection of the outdoor fan motor is
loose.
b.there is something blocking the outdoor fan.
c.the fan motor failed.
d.the outdoor control board failed.
21 Outdoor coil anti-overload
protection with cooling.
a.the unit refrigerant charge is exccessive.
b.the outdoor fan motor failed.
c.the outdoor fan is broken.
d.the condensor is dirty.
e.the air inlet and air outlet of the indoor unit
and the outdoor unit is not normal.
22 Compressor pre heating
process
it is normal mode in cold weather.
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