74
IPM module
protection
´
×
O
Ο
´
×
a.
The IPM board is failure;
b.
The outdoor fan is broken;
c.
The outdoor fan motor is failure;
d.
The outdoor fan has been blocked ;
e.
The condenser is dirty;
f.
The outdoor unit has been installed without
standard.
PFC protection
O
Ο
´
×
´
×
a.
the PFC is failure;
b.
the outdoor drive board is failure
Compressor pre
heating process
O
Ο
★
O
Ο
it is normal mode in cold weather
Chip in outdoor
board in trouble
★
´
×
O
Ο
a.
Using the wrong drive board;
b.
Using the wrong compressor.
AC voltage higher
or lower
protection
★
★
O
Ο
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
Ο
O
Ο
´
×
a.
the outdoor drive board is failure;
b.
the compressor is failure
Outdoor ambient
temperature too
low protection
★
O
Ο
O
Ο
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 is limited
1
Ο
Ο
Ο
Normal frequency rising and decreasing, no
limitation
2
×
×
★
Frequency decreasing or prohibition of
frequency rising caused by over-current
3
×
★
★
Frequency decreasing or prohibition of
frequency rising caused by anti-freezing of
refrigeration or anti-overload in heating
4
★
×
★
Frequency decreasing or prohibition of
frequency rising caused by too high compressor
discharge temperature
Summary of Contents for AS-07UR4SYDDB15
Page 21: ...31 Indoor Model 1508588 1802900 ...
Page 22: ...35 Outdoor Model 1826526 1510248 ...
Page 23: ...40 1854446 ...
Page 36: ...57 Model of outdoor unit OU PCB SYD SVE ...
Page 37: ...58 1888290 ...
Page 39: ...61 ...