59 PB
TROUBLESHOOTING
Indoor Unit
Diagnostic Code
Error
Code
Content The root cause is may be one of the following
11 Outdoor EEPROM in trouble a. The EEPROM chip is loose.
b. The EEPROM chip inserted incorrectly.
c. The EEPROM chip failed.
12 Outdoor ambient temperature too low or too
high protection
Outdoor ambient temperature too low or too high.
13 Compressor exhaust temperature too high
protection.
a. The compressor exhaust temperature sensor failed.
b. The unit refrigerant charge is low
14 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 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 Compressor drive failure. a. The outdoor drive board failed.;
b. The compressor failed.
c. The outdoor control board failed.
20 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 excessive.
b. The outdoor fan motor failed.
c. The outdoor fan is broken.
d. The condenser 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.
23
There is a leak in the product
a. There is a leak in the indoor
b. There is a leak in the outdoor
c. There is a leak in the connecting pipe
24 Outdoor board chip failure. a. Using the wrong drive board;
b. Using the wrong compressor
26 Overheated outdoor radiator a. Radiator sensor fails.
b. Detection circuit of the sensor on the control panel fails.
27 Protection against too high system pressure a. The pressure switch fails.
b. The pressure detection switch on the control panel fails.
c. The measured value of system pressure exceeds the limit.
33 The failure for temperature sensor of indoor
room
a. The indoor room temperature sensor loose.
b. The indoor room temperature sensor failed.
c. The indoor control board failed.
34 The failure for temperature sensor of indoor
coil temperature
a. The indoor coil temperature sensor loose.
b. The indoor coil temperature sensor failed.
c. The indoor control board failed.
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