6. TROUBLE SHOOTING
IPM module
protection
×
O
×
a.
The IPM board fails;
b.
The outdoor fan is broken;
c.
The outdoor fan motor fails;
d.
The outdoor fan has been blocked ;
e.
The condenser is dirty;
f.
The outdoor unit has been installed without
standard.
PFC protection
O
×
×
a.
the PFC fails;
b.
the outdoor drive board fails
Compressor pre
heating process
O
★
O
it is normal mode in cold weather
Chip in outdoor
board in trouble
★
×
O
a. Using the wrong drive board;
b. Using the wrong compressor.
AC voltage higher
or lower
protection
★
★
O
a.
the supply voltage is higher or lower than
normal;
b.
the inner supply voltage of the unit is higher or
lower than normal
DC compressor
start failure
O
O
×
a.
the outdoor drive board fails;
b.
the compressor fails
Outdoor ambient
temperature too
low protection
★
O
O
a.
Outdoor ambient temperature too low
Mark description: the lights flash every two seconds for the following faults:
Protection against
overheated
outdoor radiator
Ο
×
×
a. Radiator sensors fail
b. Detection circuit of the sensor on the control
panel fails
Protection of the
system
against
too high pressure
Ο
Ο
×
a. The pressure switch fails
b. The pressure detection switch on the control
panel fails
c. The measured value of the system pressure
exceeds the limit
When the compressor is in operation:
Mark description:
★：
Light
Ο
：
Flash
×
：
Off; the flash cycle is 1S
No.
LED1
LED2
LED3
Reasons for the current operating frequency
of the compressor are limited
1
Ο
Ο
Ο
Normal frequency rising and decreasing, no
limitation
2
×
×
★
Frequency decreasing or prohibition of
frequency rising caused by over-current
