Operation and Use
Protect/fault
Reason
Fault
display
The temp. Sensor is broken or short
circuit
IPM Overcurrent Shutdown
Fault
Compressor Activation
Failure
PFC Fault
DC Bus Overload
DC Bus Underload
AC Input Underload
AC Input Overload
Input voltage Sample Fault
Communication Failure
between DSP and PFC
Communication Fault (DSP)
Communication Fault
(
Inverter Board
)
Meaning
12
40
40
Remarks
Adjustable
Adjustable
Adjustable
Default
F03
F06
F07
F08
F09
F10
F00
F11
F01
F12
F14
F17
F15
F13
F05
IPM Overheat Stop
Weak Magnetism Alarm
Input voltage Lacking Phase
IPM Current Sample Fault
F16
Frequency conversion board fault table:
IPM Input current is large
The PFC circuit protection
Lack of phase, step or drive hardware
damage
DC bus voltage>Dc bus over-voltage
protection value
DC bus voltage<Dc bus over-voltage
protection value
The input voltage is low, causing the
inputcurrent is low
The input voltage is too high, more than
outage protection current RMS
The input voltage sampling fault
DSP and PFC connect fault
The IPM module is overheat
Compressor magnetic force is not
enough
The input voltage lost phase
IPM sampling electricity is fault
Frequency conversion board and main
board communication failure
Sensor Fault of Module/
Radiator
IGBT Power Device
Overheat Alarm
F20
Overload Alarm
EEPROM Fault Alarm
LP 15V Underload Fault
F21
F23
F25
AC Input OverCurrent Alarm
F22
MCU error
The V15V is overload or undervoltage
MCU error
Destroyed EEPROM
Activation Ban Alarm
IGBT Power Device
Overheat Fault
F24
F26
Compressor electricity is large
Compressor electricity is large
Elimination methods
Check and adjust the current
measurement
Check the measuring voltage check
requency conversion board hardware
Che ck the PFC swit ch tube
short circuit
or not
Check the input voltage measurement
Check the input voltage measurement
Check the input voltage measurement
Check the input voltage measurement
Check and adjust the current measurement
Check and adjust the current measurement
Check and adjust the current measurement
Check and adjust the current measurement
Check and adjust the current measurement
Check the communication connection
Check the communication connection
Check and measure the voltage adjustment
Check the communication connection
Check whether the chip is damaged
Replace the chip
Check the V15V input voltage in range
13.5v~16.5v or not
Check whether the chip is damaged
Replace the chip
The compressor over-current protection
The compressor over-current protection
2
4
DSP and main board communication
failure
The IGBTis overheat
The IGBTis overheat