30
F08
AC Input Overcurrent
Only in single phase unit. Restart the unit. Check if
there is electric leakage. If not, replace a new drive
board.
F09
Input voltage
sampling fault
1. Make sure power supply not lower than 300V or
higher than 500V;
2. If it’s OK, please replace a new compressor
driver board.
F10
Communication
Failure between DSP
and PFC
Only in single phase unit.
1. Check the inverter board connection.
2. If no problem, replace a new compressor driver
board.
F11
Communication Fault
between DSP and
Communication
board
1. Please check the inverter board connection.
2. If no problem, please replace a new compressor
driver board
F12
Communication
failure between PCB
and driver board
1. Check the connection between main control
board and compressor driver board. All of 12V-
12V, GND-GND, A-A, B-B should be closed.
2. If they are closed, turn on the power, then
measure the voltage between 12V and GND on
compressor driver board, if higher than 15V or
lower than 7V, please replace a new one
compressor driver board.
F13
IPM Overheat Stop
1. Check the fans are running or not.
2. Check the installation distance and space.
3. Leave enough distance and space to make heat
pump have a good transfer heating condition.
4. Clean the finned heat exchanger.
5. If they are OK, replace a new compressor driver
board.
F15
Input voltage Lacking
Phase
1. Check the phase of power supply R/S/T to
compressor driver board.
2. If it’s OK, replace a new compressor driver
board.
F16
Compressor weak
magnetic protection
alarm
1. Check the refrigeration system.
2. If it’s OK, replace a new compressor driver
board.
F17
Temperature fault of
drive board
1. Check the connection of heat sink temp. sensor.
2. Check the resistance of heat sink temp. sensor.
3. If they are OK, please replace a new heat sink
and heat sink temp. sensor.
F18
IPM Current
Sampling Fault
1. Check ambient temp. and inlet/outlet water
temp.
2. Check high/low pressure and discharge temp.
and suction temp.
